Environmental Nanotechnology, Monitoring and Management最新文献_第10页

Reactive transport and sorption behavior of pollutants in presence of redox-sensitive nano Fe0 impregnated graphene: Advancing towards continuous water filtration 氧化还原敏感的纳米Fe0浸渍石墨烯存在下污染物的反应传输和吸附行为：朝连续水过滤方向发展

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2025-02-12 DOI: 10.1016/j.enmm.2025.101053

Jai Kishan Rajak , Nitin Khandelwal , Zahid Ahmad Ganie , Dieter Schild , Gopala Krishna Darbha

Fe⁰ impregnated graphene has shown promising candidature for removing both organic and inorganic contaminants from aqueous solutions. The current study investigates and fills some of the missing gaps in their large-scale environmental applicability, including- contaminants removal from complex water matrices, simultaneous separation of multiple contaminants, and continuous water filtration possibilities. Both metals and dyes were chosen of varying ionic behavior to broaden the scope of the work.

One-step graphene oxide (GO) delamination and iron reduction were performed to prepare Fe⁰ impregnated graphene (GOI) composite. Results have shown growth of smaller spherical Fe⁰ nanoparticles (< 50 nm) on graphene with good dispersion and preserved redox state. XPS analysis of reaction precipitate confirmed that GOI could reduce CrO₄^2- to less toxic Cr(III) through reductive sorption. Removal capacities in batch mode were Ni (30.5 mg/g) < Cr (49.8 mg/g) < Cd (93.7 mg/g) < As (143.6 mg/g) in mono-metallic system. In a multi-metallic system, efficient total metal removal capacity (>340 mg/g) and continuous filtration efficiency (85 mg/g) was observed. GOI composite has also shown efficient removal and continuous separation of cationic methylene blue (81.3 mg/g), anionic methyl orange (79.7 mg/g), and zwitterionic rhodamine-B (31.7 mg/g). Electrostatic attraction on heterogeneous GOI surface, redox transformation, complexation, and co-precipitation with generated iron-oxy-hydroxide were major contaminant removal mechanisms. Results conclude a good potential of GOI composite in the separation of multiple pollutants from environmental matrices and continuous filtration of contaminated waters.

Fe0浸渍石墨烯已显示出从水溶液中去除有机和无机污染物的前景。目前的研究调查并填补了它们在大规模环境适用性方面的一些空白，包括从复杂水基质中去除污染物，同时分离多种污染物，以及连续水过滤的可能性。金属和染料都选择了不同的离子行为，以扩大工作的范围。采用一步法对氧化石墨烯（GO）进行分层和铁还原，制备了Fe0浸渍石墨烯（GOI）复合材料。结果表明，生长了更小的球形Fe0纳米颗粒(<；50 nm)，具有良好的分散性和保持氧化还原状态。反应沉淀的XPS分析证实，GOI可以通过还原吸附将CrO42-还原为毒性较小的Cr（III）。批处理模式的去除能力为Ni (30.5 mg/g) <；铬（49.8 mg/g） <；Cd (93.7 mg/g) <；As （143.6 mg/g）在单金属体系。在多金属系统中，观察到有效的总金属去除能力（>340 mg/g）和连续过滤效率（85 mg/g）。GOI复合材料对阳离子亚甲基蓝（81.3 mg/g）、阴离子甲基橙（79.7 mg/g）和两性离子罗丹明- b （31.7 mg/g）也有较好的去除效果。非均相GOI表面的静电吸引、氧化还原转化、络合以及与生成的氧化铁共沉淀是主要的污染物去除机制。结果表明，GOI复合材料在环境基质中多种污染物的分离和污染水体的连续过滤方面具有良好的潜力。

{"title":"Reactive transport and sorption behavior of pollutants in presence of redox-sensitive nano Fe0 impregnated graphene: Advancing towards continuous water filtration","authors":"Jai Kishan Rajak , Nitin Khandelwal , Zahid Ahmad Ganie , Dieter Schild , Gopala Krishna Darbha","doi":"10.1016/j.enmm.2025.101053","DOIUrl":"10.1016/j.enmm.2025.101053","url":null,"abstract":"<div><div>Fe<sup>0</sup> impregnated graphene has shown promising candidature for removing both organic and inorganic contaminants from aqueous solutions. The current study investigates and fills some of the missing gaps in their large-scale environmental applicability, including- contaminants removal from complex water matrices, simultaneous separation of multiple contaminants, and continuous water filtration possibilities. Both metals and dyes were chosen of varying ionic behavior to broaden the scope of the work.</div><div>One-step graphene oxide (GO) delamination and iron reduction were performed to prepare Fe<sup>0</sup> impregnated graphene (GOI) composite. Results have shown growth of smaller spherical Fe<sup>0</sup> nanoparticles (< 50 nm) on graphene with good dispersion and preserved redox state. XPS analysis of reaction precipitate confirmed that GOI could reduce CrO<sub>4</sub><sup>2-</sup> to less toxic Cr(III) through reductive sorption. Removal capacities in batch mode were Ni (30.5 mg/g) < Cr (49.8 mg/g) < Cd (93.7 mg/g) < As (143.6 mg/g) in mono-metallic system. In a multi-metallic system, efficient total metal removal capacity (>340 mg/g) and continuous filtration efficiency (85 mg/g) was observed. GOI composite has also shown efficient removal and continuous separation of cationic methylene blue (81.3 mg/g), anionic methyl orange (79.7 mg/g), and zwitterionic rhodamine-B (31.7 mg/g). Electrostatic attraction on heterogeneous GOI surface, redox transformation, complexation, and co-precipitation with generated iron-oxy-hydroxide were major contaminant removal mechanisms. Results conclude a good potential of GOI composite in the separation of multiple pollutants from environmental matrices and continuous filtration of contaminated waters.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101053"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanoparticle based antigen detection of norovirus in human faecal samples: A proof-of-concept study 人类粪便样本中诺如病毒的纳米颗粒抗原检测：概念验证研究

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2025-04-11 DOI: 10.1016/j.enmm.2025.101064

Rishi Pandey , Pradip Gyawali , Mark A.T. Blaskovich , Sanjaya K.C.

Immunocapture assays that are fast, affordable, and can be utilised as on-site sensors for detecting pathogens or their biomarkers hold great value for ensuring public health and food safety. As proof of concept, a magnetic immunocapture assay was developed to detect norovirus. Acommercially available monoclonal antibody capable of capturing both norovirus genogroup I and II (GI and GII) was conjugated to the magnetic nanoparticles (MNPs) for capture and sequestration of norovirus GI and GII under laboratory conditions. The capability of the functionalised MNPs to capture norovirus from the faecal extract was determined by reverse transcription-qPCR. The capture efficiency of MNPs was >90 % for both genogroups of noroviruses. To complement the magnetic capture and enable rapid detection and genogroup identification, two different monoclonal antibodies specific to genogroups GI and GII were conjugated onto a fluorescent nanoparticle surface, and then used to quantify captured norovirus in a ‘sandwich’ assay. Replicate faecal extract suspensions containing 10³ gene copies of norovirus GI and GII per µL were tested with the magnetic capture-fluorescence detection assay platform, with quantification of fluorescent intensity. The fluorescent particle assay for the detection of the biomarkers matched the sensitivity of qPCR. This method doesn’t require any sample preparation steps like nucleic acid extraction and can be easily converted into a rapid point of need detection system. This dual nanoparticle system holds promise as an inexpensive and reliable analytical tool for classical qualitative immunoassays that are prone to false positives.

免疫捕获测定法快速、经济实惠，可作为检测病原体或其生物标志物的现场传感器，对确保公共卫生和食品安全具有重要价值。作为概念的证明，开发了一种磁免疫捕获法来检测诺如病毒。在实验室条件下，将一种能够捕获诺如病毒基因组I和基因组II （GI和GII）的市售单克隆抗体与磁性纳米颗粒（MNPs）偶联，用于捕获和隔离诺如病毒GI和GII。通过逆转录- qpcr确定功能化MNPs从粪便提取物中捕获诺如病毒的能力。两个诺如病毒基因组的MNPs捕获效率均为90%。为了补充磁捕获并实现快速检测和基因组鉴定，将GI和GII基因组特异性的两种不同单克隆抗体偶联到荧光纳米颗粒表面，然后在“三明治”试验中用于定量捕获的诺如病毒。每µL含有103个诺如病毒GI和GII基因拷贝的重复粪便提取物混悬液，采用磁捕获-荧光检测实验平台进行检测，并定量荧光强度。荧光颗粒法检测生物标志物的灵敏度与qPCR相匹配。该方法不需要核酸提取等样品制备步骤，易于转化为快速的需求点检测系统。这种双纳米粒子系统有望成为一种廉价而可靠的分析工具，用于容易出现假阳性的经典定性免疫测定。

{"title":"Nanoparticle based antigen detection of norovirus in human faecal samples: A proof-of-concept study","authors":"Rishi Pandey , Pradip Gyawali , Mark A.T. Blaskovich , Sanjaya K.C.","doi":"10.1016/j.enmm.2025.101064","DOIUrl":"10.1016/j.enmm.2025.101064","url":null,"abstract":"<div><div>Immunocapture assays that are fast, affordable, and can be utilised as on-site sensors for detecting pathogens or their biomarkers hold great value for ensuring public health and food safety. As proof of concept, a magnetic immunocapture assay was developed to detect norovirus. Acommercially available monoclonal antibody capable of capturing both norovirus genogroup I and II (GI and GII) was conjugated to the magnetic nanoparticles (MNPs) for capture and sequestration of norovirus GI and GII under laboratory conditions. The capability of the functionalised MNPs to capture norovirus from the faecal extract was determined by reverse transcription-qPCR. The capture efficiency of MNPs was >90 % for both genogroups of noroviruses. To complement the magnetic capture and enable rapid detection and genogroup identification, two different monoclonal antibodies specific to genogroups GI and GII were conjugated onto a fluorescent nanoparticle surface, and then used to quantify captured norovirus in a ‘sandwich’ assay. Replicate faecal extract suspensions containing 10<sup>3</sup> gene copies of norovirus GI and GII per µL were tested with the magnetic capture-fluorescence detection assay platform, with quantification of fluorescent intensity. The fluorescent particle assay for the detection of the biomarkers matched the sensitivity of qPCR. This method doesn’t require any sample preparation steps like nucleic acid extraction and can be easily converted into a rapid point of need detection system. This dual nanoparticle system holds promise as an inexpensive and reliable analytical tool for classical qualitative immunoassays that are prone to false positives.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101064"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143852084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graphitic carbon nitride nanotubes decorated with ruthenium: New efficient visible-light-driven photocatalyst 钌修饰的石墨氮化碳纳米管：新型高效可见光驱动光催化剂

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2024-12-09 DOI: 10.1016/j.enmm.2024.101034

Mohaddeseh Shahabi Nejad, Zahra Vakily, Ali Mostafavi, Hassan Sheibani

The discharge of effluents containing antibiotics into the environment poses a significant challenge, contributing to the proliferation of resistant bacterial pathogens. Consequently, the removal and degradation of these contaminants from aqueous environments, particularly through photodegradation with potent photocatalysts, has attracted considerable research interest. In this research, A novel generation of visible-light photocatalyst was developed by immobilizing a ruthenium complex on modified graphitic carbon nitride nanotubes, with a focus on degrading the commonly used antibiotic, tetracycline. To achieve this, the synthesis of graphitic carbon nitride nanotubes (g-C₃N₄ NTs) was successfully conducted using the hydrothermal method, followed by functionalization with the 1,10-Phenantroline-5,6-dione ligand. Subsequently, the functionalized g-C₃N₄ NTs were further enhanced through the immobilization of dichloro(p-cymene)ruthenium(II) dimer. The structure and morphology of the prepared photocatalyst were analyzed using X-ray diffraction (XRD), Fourier transform infrared (FT-IR)spectroscopy, and scanning and transmission electron microscopy (SEM & TEM). Subsequently, the photocatalyst’s efficiency in optically degrading tetracycline antibiotics was evaluated in a suspension reactor equipped with a 60 W LED lamp. Key parameters such as catalyst dosage, irradiation duration, temperature, and pH were systematically optimized. The results indicated that the immobilization of the Ru complex onto functionalized g-C₃N₄ NTs significantly enhanced photocatalytic activity, resulting in a 43 % increase in degradation efficiency. Furthermore, Chemical Oxygen Demand (COD) analysis demonstrated that approximately 90 % mineralization of a 10 mg/L tetracycline solution could be achieved using 20 mg of Ru (II) complex/g-C₃N₄ NTs at pH 7 after 480 min, without the need for additional oxidants.

将含有抗生素的废水排放到环境中是一项重大挑战，有助于耐药细菌病原体的增殖。因此，从水环境中去除和降解这些污染物，特别是通过强效光催化剂进行光降解，已经引起了相当大的研究兴趣。本研究通过将钌配合物固定在改性石墨氮化碳纳米管上，开发了新一代可见光催化剂，重点降解了常用的抗生素四环素。为此，采用水热法成功合成了石墨化氮化碳纳米管（g-C3N4 NTs），然后用1,10- phenantroine -5,6-dione配体进行了功能化。随后，通过二氯（对花癸烯）钌（II）二聚体的固定化，功能化的g-C3N4 NTs进一步增强。采用x射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、扫描和透射电子显微镜(SEM &；TEM)。随后，在配备60 W LED灯的悬浮反应器中评估光催化剂光学降解四环素类抗生素的效率。对催化剂用量、辐照时间、温度、pH等关键参数进行了系统优化。结果表明，Ru配合物固定在功能化的g-C3N4 NTs上显著提高了光催化活性，降解效率提高了43%。此外，化学需氧量（COD）分析表明，在pH为7的条件下，使用20 mg Ru （II）络合物/g-C3N4 NTs，在480分钟后，10 mg/L四环素溶液的矿化率约为90%，无需额外的氧化剂。

{"title":"Graphitic carbon nitride nanotubes decorated with ruthenium: New efficient visible-light-driven photocatalyst","authors":"Mohaddeseh Shahabi Nejad, Zahra Vakily, Ali Mostafavi, Hassan Sheibani","doi":"10.1016/j.enmm.2024.101034","DOIUrl":"10.1016/j.enmm.2024.101034","url":null,"abstract":"<div><div>The discharge of effluents containing antibiotics into the environment poses a significant challenge, contributing to the proliferation of resistant bacterial pathogens. Consequently, the removal and degradation of these contaminants from aqueous environments, particularly through photodegradation with potent photocatalysts, has attracted considerable research interest. In this research, A novel generation of visible-light photocatalyst was developed by immobilizing a ruthenium complex on modified graphitic carbon nitride nanotubes, with a focus on degrading the commonly used antibiotic, tetracycline. To achieve this, the synthesis of graphitic carbon nitride nanotubes (g-C<sub>3</sub>N<sub>4</sub> NTs) was successfully conducted using the hydrothermal method, followed by functionalization with the 1,10-Phenantroline-5,6-dione ligand. Subsequently, the functionalized g-C<sub>3</sub>N<sub>4</sub> NTs were further enhanced through the immobilization of dichloro(p-cymene)ruthenium(II) dimer. The structure and morphology of the prepared photocatalyst were analyzed using X-ray diffraction (XRD), Fourier transform infrared (FT-IR)spectroscopy, and scanning and transmission electron microscopy (SEM & TEM). Subsequently, the photocatalyst’s efficiency in optically degrading tetracycline antibiotics was evaluated in a suspension reactor equipped with a 60 W LED lamp. Key parameters such as catalyst dosage, irradiation duration, temperature, and pH were systematically optimized. The results indicated that the immobilization of the Ru complex onto functionalized g-C<sub>3</sub>N<sub>4</sub> NTs significantly enhanced photocatalytic activity, resulting in a 43 % increase in degradation efficiency. Furthermore, Chemical Oxygen Demand (COD) analysis demonstrated that approximately 90 % mineralization of a 10 mg/L tetracycline solution could be achieved using 20 mg of Ru (II) complex/g-C<sub>3</sub>N<sub>4</sub> NTs at pH 7 after 480 min, without the need for additional oxidants.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101034"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wintertime water quality assessment via integrated indexical approaches with reference to drinking and irrigation standards in NW India 参考印度西北部饮用和灌溉标准，通过综合指数方法进行冬季水质评价

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2024-12-09 DOI: 10.1016/j.enmm.2024.101032

Saloni Kamboj, Nirankar Singh

To assess the wintertime toxicity linked with the characteristics of public supply water, tap water samples were collected from the selected sites of Ambala district in India during October 2022 to February 2023 covering winter season. Following the standard procedures and protocols recommended by APHA, BIS and WHO, several characteristics were explored in order to find their linkages with the health issues of adults and children during winters. The irrigation water quality parameters were also taken into consideration during characterization. The high levels of toxic elements (Pb, As, Cd, and Ni) were observed at various sites during this period exceeding the BIS acceptable limits. The average levels of F^-, Cl^-, NO₃^–, SO₄^2-, PO₄^3- and HCO₃^– were found to be 0.261 mg L^-1, 27.95 mg L^-1, 0.234 mg L^-1, 47.99 mg L^-1, 0.210 mg L^-1 and 5.97 mg L^-1 respectively. Levels of As, Ni, Cd, Co, Cr, Cu, Pb, and Zn remained at 123.62 µgL^-1, 56.24 µgL^-1 2.59 µgL^-1, 1.367 µgL^-1, 9.45 µgL^-1, 8.79 µgL^-1, 77.92 µgL^-1, and 10.79 µgL^-1 respectively. The mean hazard indices were found greater than one (>1) for children and adults both (0.96–5.5, 0.96–2.61) during this winter season. Owing to low body weight, children found more prone than adults to health issues. The mostly sites had good water quality indices (WQIs). Based on the SAR, RSC, MAR, SSP values, mostly samples were found in excellent category of water source for irrigation. Several statistical and geographic distributions were used to evaluate the samples for direct human consumption along with the associated health risk at the study area. This study, first time reports the toxicity levels associated with the tap water characteristics in the chosen area and discusses the novel findings of the hazard analysis with reference to direct intake of freshwater and water for irrigation.

为了评估与公共供水特征相关的冬季毒性，在2022年10月至2023年2月期间，从印度Ambala地区的选定地点收集了冬季自来水样本。按照卫生保健协会、国际卫生组织和卫生组织建议的标准程序和方案，探讨了若干特征，以便找出它们与冬季成人和儿童健康问题的联系。表征时还考虑了灌溉水质参数。在此期间，在多个地点观察到高水平的有毒元素（铅、砷、镉和镍）超过了国际清算银行的可接受限度。F-、Cl-、NO3 -、SO42-、PO43-和HCO3 -的平均含量分别为0.261 mg L-1、27.95 mg L-1、0.234 mg L-1、47.99 mg L-1、0.210 mg L-1和5.97 mg L-1。As、Ni、Cd、Co、Cr、Cu、Pb和Zn的含量分别为123.62µgL-1、56.24µgL-1、2.59µgL-1、1.367µgL-1、9.45µgL-1、8.79µgL-1、77.92µgL-1和10.79µgL-1。冬季儿童和成人的平均危害指数（0.96 ~ 5.5,0.96 ~ 2.61）均大于1 （>1）。由于体重过轻，儿童比成年人更容易出现健康问题。大部分站点水质指数较好。基于SAR、RSC、MAR、SSP值，大部分样品属于灌溉水源的优类。使用了几种统计和地理分布来评估研究区域人类直接消费的样本以及相关的健康风险。本研究首次报道了选定地区自来水特性的毒性水平，并讨论了直接取用淡水和灌溉用水危害分析的新发现。

{"title":"Wintertime water quality assessment via integrated indexical approaches with reference to drinking and irrigation standards in NW India","authors":"Saloni Kamboj, Nirankar Singh","doi":"10.1016/j.enmm.2024.101032","DOIUrl":"10.1016/j.enmm.2024.101032","url":null,"abstract":"<div><div>To assess the wintertime toxicity linked with the characteristics of public supply water, tap water samples were collected from the selected sitesof Ambala district in India during October 2022 to February 2023 covering winter season.Following the standard procedures and protocols recommended by APHA, BIS and WHO, severalcharacteristics were exploredin order to find their linkages with the health issues of adults and children during winters. The irrigation water quality parameters were also taken into consideration during characterization. The high levels of toxic elements (Pb, As, Cd, and Ni) were observed at various sites during this period exceeding the BISacceptable limits. The averagelevels of F<sup>-</sup>, Cl<sup>-</sup>, NO<sub>3</sub><sup>–</sup>, SO<sub>4</sub><sup>2-</sup>, PO<sub>4</sub><sup>3-</sup> and HCO<sub>3</sub><sup>–</sup> were found to be 0.261 mg L<sup>-1</sup>, 27.95 mg L<sup>-1</sup>, 0.234 mg L<sup>-1</sup>, 47.99 mg L<sup>-1</sup>, 0.210 mg L<sup>-1</sup> and 5.97 mg L<sup>-1</sup> respectively. Levels of As, Ni, Cd, Co, Cr, Cu, Pb, and Znremained at 123.62 µgL<sup>-1</sup>, 56.24 µgL<sup>-1</sup> 2.59 µgL<sup>-1</sup>, 1.367 µgL<sup>-1</sup>, 9.45 µgL<sup>-1</sup>, 8.79 µgL<sup>-1</sup>, 77.92 µgL<sup>-1</sup>, and 10.79 µgL<sup>-1</sup>        <!-->This study, first time reports the toxicity levels associated with the tap water characteristics in the chosen area and discusses the novel findings of the hazard analysis with reference to direct intake of freshwater and water for irrigation.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101032"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance by design of TiO2 nanostructured granules exploitable in water remediation applications 二氧化钛纳米颗粒的性能设计及其在水修复中的应用

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2025-04-21 DOI: 10.1016/j.enmm.2025.101071

Maurizio Vespignani , Ilaria Zanoni , Simona Ortelli , Magda Blosi , Chiara Artusi , Andreana Piancastelli , Cesare Melandri , Irini Furxhi , Anna Luisa Costa

The development of advanced materials through safe and sustainable methods has become a priority in the field of material science. This study addresses this need by exploring how different design options affect the performance of nano-TiO₂ granulated powders exploitable in water remediation applications. The high-shear wet granulation (HSWG) process parameters have been investigated to produce nanostructured powders that are easy to handle, disperse, and remove from liquids, while preserving their ability to adsorb and photodegrade water pollutants or encapsulate and stabilize active ingredients. We systematically examined a range of key variables, including liquid-to-solid ratio, granulation time, and impeller speed, which were identified as the primary factors affecting the size population. The percentage of the > 1000 µm granules fraction reached 100 % by increasing the liquid-to-solid ratio up to 0.6 g_water/g_powder, while an increase in granulation time and impeller speed caused a reduction of the largest fraction by approximately 30 % and 20 %, respectively. Additionally, we investigated the addition of different binder agents, followed by calcination at 600 °C. We found a correlation between tapped density, open porosity, swelling ratio and compressive strength. Maltodextrin (MD) improved the degree of compaction resulting in the highest compressive strength (9.5 ± 0.2 MPa) and lowest release of titanium when redispersed in water, whilst micro acryl emulsion (MA) improved the sample porosity (80.6 ± 0.5 %) and its capacity to adsorb water (swelling ratio. The pro-oxidative potential of the granules was evaluated using an •OH radical sensitive probe. TiO₂-based granules showed a reactivity comparable to TiO₂ pristine nanopowders, consuming approximately 98 % of RNO after 4 h.

通过安全和可持续的方法开发先进材料已成为材料科学领域的一个重点。本研究通过探索不同的设计选择如何影响可用于水修复应用的纳米tio2颗粒状粉末的性能来解决这一需求。研究了高剪切湿造粒（HSWG）工艺参数，以生产易于处理、分散和从液体中去除的纳米结构粉末，同时保持其吸附和光降解水污染物或封装和稳定活性成分的能力。我们系统地检查了一系列关键变量，包括液固比、造粒时间和叶轮转速，这些变量被确定为影响粒度种群的主要因素。>；通过将液固比提高到0.6 gwater/gpowder， 1000µm颗粒分数达到100%，而造粒时间和叶轮转速的增加分别使最大分数降低了约30%和20%。此外，我们还研究了不同粘结剂的加入，然后在600°C下进行煅烧。我们发现了出丝密度、开孔率、膨胀率和抗压强度之间的相关性。麦芽糖糊精（MD）提高了样品的压实度，使样品的抗压强度最高（9.5±0.2 MPa），再分散在水中时钛的释放量最低，而微丙烯酸酯乳液（MA）提高了样品的孔隙率（80.6±0.5%）和吸水性（溶胀率）。使用•OH自由基敏感探针评估颗粒的促氧化电位。TiO2基颗粒表现出与TiO2原始纳米粉末相当的反应性，在4小时后消耗约98%的RNO。

{"title":"Performance by design of TiO2 nanostructured granules exploitable in water remediation applications","authors":"Maurizio Vespignani , Ilaria Zanoni , Simona Ortelli , Magda Blosi , Chiara Artusi , Andreana Piancastelli , Cesare Melandri , Irini Furxhi , Anna Luisa Costa","doi":"10.1016/j.enmm.2025.101071","DOIUrl":"10.1016/j.enmm.2025.101071","url":null,"abstract":"<div><div>The development of advanced materials through safe and sustainable methods has become a priority in the field of material science. This study addresses this need by exploring how different design options affect the performance of nano-TiO<sub>2</sub> granulated powders exploitable in water remediation applications. The high-shear wet granulation (HSWG) process parameters have been investigated to produce nanostructured powders that are easy to handle, disperse, and remove from liquids, while preserving their ability to adsorb and photodegrade water pollutants or encapsulate and stabilize active ingredients. We systematically examined a range of key variables, including liquid-to-solid ratio, granulation time, and impeller speed, which were identified as the primary factors affecting the size population. The percentage of the > 1000 µm granules fraction reached 100 % by increasing the liquid-to-solid ratio up to 0.6 g<sub>water</sub>/g<sub>powder</sub>, while an increase in granulation time and impeller speed caused a reduction of the largest fraction by approximately 30 % and 20 %, respectively. Additionally, we investigated the addition of different binder agents, followed by calcination at 600 °C. We found a correlation between tapped density, open porosity, swelling ratio and compressive strength. Maltodextrin (MD) improved the degree of compaction resulting in the highest compressive strength (9.5 ± 0.2 MPa) and lowest release of titanium when redispersed in water, whilst micro acryl emulsion (MA) improved the sample porosity (80.6 ± 0.5 %) and its capacity to adsorb water (swelling ratio. The pro-oxidative potential of the granules was evaluated using an •OH radical sensitive probe. TiO<sub>2</sub>-based granules showed a reactivity comparable to TiO<sub>2</sub> pristine nanopowders, consuming approximately 98 % of RNO after 4 h.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101071"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous LC-MS/MS determination of multi-class emerging contaminants in an orange plant system LC-MS/MS同时测定柑橘植物体系中多类新发污染物

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2025-05-12 DOI: 10.1016/j.enmm.2025.101077

Mahdiyeh Otoukesh, Claudia Simarro-Gimeno, Félix Hernández, Elena Pitarch

As freshwater supplies decline, agriculture is turning to alternative sources like recycled wastewater for irrigation. However, treated wastewater may still contain organic micropollutants (OMPs), which can contaminate soil, be absorbed by crops, and enter the food chain. This raises the need for analytical methods to reliable identify and quantify OMPs in vegetable and soil matrices at low concentrations. Additionally, advanced wastewater treatment methods are necessary to minimize OMPs in effluents from conventional wastewater treatment plants.

This study, part of a broader project on recycled wastewater for irrigating orange fields, focused on developing a modified QuEChERS method to determine 18 pesticides and 15 pharmaceuticals in soil, orange leaves and fruits. Compounds were quantified using liquid chromatography coupled to tandem mass spectrometry with a triple quadrupole. The methods were validated at two fortification levels (1–5 and 10–50 ng g⁻¹). Matrix effects were evaluated, showing a minimal impact in soil, but significant effects (> 20 %) in oranges and leaves, requiring matrix-matched calibration and/or isotopically labeled internal standards for accurate correction. The recoveries for most compounds were within 70–120 %, with relative standard deviations under 20 %, and limits of quantification ranged 1–5 ng g⁻¹.

In real samples, the insecticide acetamiprid was the most bioaccumulated contaminant, exceeding 20 ng g⁻¹ in leaves. Eleven pesticides were detected at concentrations below the limit of quantification, and the pharmaceutical atorvastatin was found in a soil sample.

随着淡水供应的减少，农业正在转向替代水源，如回收废水用于灌溉。然而，处理后的废水可能仍含有有机微污染物（OMPs），这些污染物会污染土壤，被作物吸收并进入食物链。这增加了对分析方法的需求，以可靠地识别和量化蔬菜和土壤基质中低浓度的omp。此外，必须采用先进的废水处理方法，以最大限度地减少传统废水处理厂流出物中的omp。这项研究是一个更广泛的柑橘田灌溉回收废水项目的一部分，其重点是开发一种改进的QuEChERS方法，以测定土壤、柑橘叶和果实中的18种农药和15种药物。采用液相色谱-三重四极杆串联质谱法对化合物进行定量分析。在两种强化水平（1 - 5和10-50 ng g−1）下验证了该方法。对基质效应进行了评价，表明基质效应对土壤的影响很小，但效果显著(>；20%)，需要基质匹配校准和/或同位素标记的内标进行准确校正。加样回收率在70 ~ 120%之间，相对标准偏差在20%以内，定量限为1 ~ 5 ng g−1。在实际样品中，杀虫剂啶虫脒是生物积累最多的污染物，在叶片中超过20 ng g−1。11种农药的浓度低于定量限制，在土壤样本中发现了药物阿托伐他汀。

{"title":"Simultaneous LC-MS/MS determination of multi-class emerging contaminants in an orange plant system","authors":"Mahdiyeh Otoukesh, Claudia Simarro-Gimeno, Félix Hernández, Elena Pitarch","doi":"10.1016/j.enmm.2025.101077","DOIUrl":"10.1016/j.enmm.2025.101077","url":null,"abstract":"<div><div>As freshwater supplies decline, agriculture is turning to alternative sources like recycled wastewater for irrigation. However, treated wastewater may still contain organic micropollutants (OMPs), which can contaminate soil, be absorbed by crops, and enter the food chain. This raises the need for analytical methods to reliable identify and quantify OMPs in vegetable and soil matrices at low concentrations. Additionally, advanced wastewater treatment methods are necessary to minimize OMPs in effluents from conventional wastewater treatment plants.</div><div>This study, part of a broader project on recycled wastewater for irrigating orange fields, focused on developing a modified QuEChERS method to determine 18 pesticides and 15 pharmaceuticals in soil, orange leaves and fruits. Compounds were quantified using liquid chromatography coupled to tandem mass spectrometry with a triple quadrupole. The methods were validated at two fortification levels (1–5 and 10–50 ng g<sup>−1</sup>). Matrix effects were evaluated, showing a minimal impact in soil, but significant effects (> 20 %) in oranges and leaves, requiring matrix-matched calibration and/or isotopically labeled internal standards for accurate correction. The recoveries for most compounds were within 70–120 %, with relative standard deviations under 20 %, and limits of quantification ranged 1–5 ng g<sup>−1</sup>.</div><div>In real samples, the insecticide acetamiprid was the most bioaccumulated contaminant, exceeding 20 ng g<sup>−1</sup> in leaves. Eleven pesticides were detected at concentrations below the limit of quantification, and the pharmaceutical atorvastatin was found in a soil sample.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101077"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monte Carlo simulation for human health risk assessment of groundwater contaminated with arsenic at an Iranian semi-arid region 伊朗半干旱区受砷污染地下水人体健康风险评估的蒙特卡罗模拟

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2025-04-12 DOI: 10.1016/j.enmm.2025.101069

Ali Mantashloo , Reza Shokoohi , Zahra Torkshavand , Ebrahim Chavoshi , Salman Khazaei , Mohammad Khazaei , Amir shabanloo

The present study investigated the contamination of drinking water with arsenic and its human health risk assessment in Qorveh County, Kurdistan Province, Iran. The data of this study were collected and analyzed in the wet and dry seasons and from a total of 56 groundwater samples. This study used two deterministic and stochastic approaches to evaluate carcinogenic and non-carcinogenic risk. Monte Carlo simulation, which is based on the Markov chain approach, was used for risk assessment. The examination of heavy metals As, B, Cd, Cu, Hg, Mn, Ni, Pb, Sb, V, and Zn in the water samples reveals that except for the arsenic, the insignificant concentration of the abovementioned metals was found, consequently, the health risk studies were conducted focusing on the arsenic contamination. Data analysis revealed the average concentration of arsenic in the dry and wet seasons to be 14.93 ± 17.67 and 13.79 ± 16.57 μg/L, respectively. Furthermore, beyond 39 % and 35 % of the area of Qorveh County rely on groundwater sources having the arsenic contents more than the permissible level (10 µg/L) in dry and wet seasons, respectively. The Monte Carlo simulation output clearly showed that the HQ values for the 95th percentile in the dry season were 3.58 and 2.03 for the age groups of children and adults, respectively. In other words, the non-carcinogenic risk for children is almost twice that of adults. All carcinogenic risk values was reported more than the acceptable threshold, typically set at 1 × 10⁻⁶ (or 1 in a million) by EPA. The sensitivity analysis of the contribution of arsenic concentration, duration of exposure, and rate of ingestion showed 89.5 %, 5.7 %, and 4.6 %, respectively, which indicates the major effect of arsenic concentration. The findings of this study provide an environmental alert to inform policy and attract appropriate financial resources for the management of drinking water sources containing arsenic in these areas.

本研究调查了伊朗库尔德斯坦省Qorveh县饮用水砷污染及其人体健康风险评估。本研究的数据收集和分析是在干湿季节和56个地下水样本中进行的。本研究采用确定性和随机两种方法来评估致癌和非致癌风险。采用基于马尔可夫链方法的蒙特卡罗模拟进行风险评估。通过对水样中重金属As、B、Cd、Cu、Hg、Mn、Ni、Pb、Sb、V、Zn的检测发现，除砷外，上述重金属的浓度均不显著，因此重点开展了砷污染的健康风险研究。数据分析显示，干湿季节砷的平均浓度分别为14.93±17.67和13.79±16.57 μg/L。此外，库尔维县超过39%和35%的地区依赖地下水，其砷含量在旱季和雨季分别超过允许水平（10微克/升）。Monte Carlo模拟结果清楚地表明，在旱季，儿童和成人年龄组第95百分位的HQ值分别为3.58和2.03。换句话说，儿童的非致癌风险几乎是成人的两倍。所有报告的致癌风险值都超过了可接受的阈值，EPA通常将其设定为1 × 10−6（或百万分之一）。砷浓度、暴露时间和摄食率的敏感性分析分别为89.5%、5.7%和4.6%，表明砷浓度是主要影响因素。这项研究的结果提供了一个环境警报，为这些地区含砷饮用水源的管理提供政策信息和吸引适当的财政资源。

{"title":"Monte Carlo simulation for human health risk assessment of groundwater contaminated with arsenic at an Iranian semi-arid region","authors":"Ali Mantashloo , Reza Shokoohi , Zahra Torkshavand , Ebrahim Chavoshi , Salman Khazaei , Mohammad Khazaei , Amir shabanloo","doi":"10.1016/j.enmm.2025.101069","DOIUrl":"10.1016/j.enmm.2025.101069","url":null,"abstract":"<div><div>The present study investigated the contamination of drinking water with arsenic and its human health risk assessment in Qorveh County, Kurdistan Province, Iran. The data of this study were collected and analyzed in the wet and dry seasons and from a total of 56 groundwater samples. This study used two deterministic and stochastic approaches to evaluate carcinogenic and non-carcinogenic risk. Monte Carlo simulation, which is based on the Markov chain approach, was used for risk assessment. The examination of heavy metals As, B, Cd, Cu, Hg, Mn, Ni, Pb, Sb, V, and Zn in the water samples reveals that except for the arsenic, the insignificant concentration of the abovementioned metals was found, consequently, the health risk studies were conducted focusing on the arsenic contamination. Data analysis revealed the average concentration of arsenic in the dry and wet seasons to be 14.93 ± 17.67 and 13.79 ± 16.57 μg/L, respectively. Furthermore, beyond 39 % and 35 % of the area of Qorveh County rely on groundwater sources having the arsenic contents more than the permissible level (10 µg/L) in dry and wet seasons, respectively. The Monte Carlo simulation output clearly showed that the HQ values for the 95th percentile in the dry season were 3.58 and 2.03 for the age groups of children and adults, respectively. In other words, the non-carcinogenic risk for children is almost twice that of adults. All carcinogenic risk values was reported more than the acceptable threshold, typically set at 1 × 10<sup>−6</sup> (or 1 in a million) by EPA. The sensitivity analysis of the contribution of arsenic concentration, duration of exposure, and rate of ingestion showed 89.5 %, 5.7 %, and 4.6 %, respectively, which indicates the major effect of arsenic concentration. The findings of this study provide an environmental alert to inform policy and attract appropriate financial resources for the management of drinking water sources containing arsenic in these areas.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101069"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of fly ash/melamine composites for crystal violate dye removal from aqueous media 粉煤灰/三聚氰胺复合材料去除水中晶体染料的研究

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2025-02-13 DOI: 10.1016/j.enmm.2025.101056

Imran Khan Rind , Ahmet Sarı , Mustafa Tuzen , Muhammad Farooque Lanjwani , Tawfik A. Saleh

Fly ash (FA) as a low-cost and easily obtainable by-product from thermal power plants is considered for the decontamination of inorganic and organic pollutants from wastewater. In this work, FA was grafted with melamine and the obtained composite was used for the adsorption of crystal violet (CV) from water. By modification of melamine, the surface of FA was enhanced with amide groups as effective binding groups for CV molecules and therefore achieved higher sorption capacity. The chemical and textural characteristics of the FA/Melamine composite were studied by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). Factorial designing was used for evaluating optimum adsorption parameters. ANOVA analysis of the P-value of individuals and combined variables was significant due to a P-value of less than 0.05 and a higher F-value. Equilibrium results show a monolayer isotherm model by Langmuir isotherm model with a maximum CV uptake capacity of 487 mg g⁻¹ under optimized conditions (250 mg adsorbent dosage, 10 ppm concentration, 30 min contact time and pH 6.0). Kinetic studies revealed that CV removal was nominated by the pseudo-second-order (PSO) model. CV dye molecules were adsorbed onto FA/Melamine composite via electrostatic attractions dipole–dipole interactions and n-π stacking interactions. Furthermore, the obtained results exposed that the synthesized FA/Melamine composite can be assessed as a promising sorbent for CV dye removal with high adsorption capacity.

粉煤灰作为一种低成本、易获取的火电厂副产物，被认为是去除废水中无机和有机污染物的有效原料。本研究将FA接枝三聚氰胺，所得复合材料用于吸附水中的结晶紫（CV）。通过对三聚氰胺的改性，FA表面增强了酰胺基团作为CV分子的有效结合基团，从而获得了更高的吸附能力。采用扫描电镜（SEM）和傅里叶变换红外光谱（FTIR）研究了FA/三聚氰胺复合材料的化学和结构特征。用析因设计法评价最佳吸附参数。个体和组合变量的p值的ANOVA分析具有显著性，因为p值小于0.05，f值较高。平衡结果表明，在吸附剂用量为250 mg，浓度为10 ppm，接触时间为30 min， pH为6.0的条件下，采用Langmuir等温线模型建立的单层等温线模型最大CV吸收量为487 mg g−1。动力学研究表明，CV去除符合伪二阶（PSO）模型。通过静电吸引、偶极-偶极相互作用和n-π堆积相互作用，将CV染料分子吸附在FA/三聚氰胺复合材料上。结果表明，合成的FA/三聚氰胺复合材料具有较高的吸附能力，是一种很有前途的去除CV染料的吸附剂。

{"title":"Development of fly ash/melamine composites for crystal violate dye removal from aqueous media","authors":"Imran Khan Rind , Ahmet Sarı , Mustafa Tuzen , Muhammad Farooque Lanjwani , Tawfik A. Saleh","doi":"10.1016/j.enmm.2025.101056","DOIUrl":"10.1016/j.enmm.2025.101056","url":null,"abstract":"<div><div>Fly ash (FA) as a low-cost and easily obtainable by-product from thermal power plants is considered for the decontamination of inorganic and organic pollutants from wastewater. In this work, FA was grafted with melamine and the obtained composite was used for the adsorption of crystal violet (CV) from water. By modification of melamine, the surface of FA was enhanced with amide groups as effective binding groups for CV molecules and therefore achieved higher sorption capacity. The chemical and textural characteristics of the FA/Melamine composite were studied by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). Factorial designing was used for evaluating optimum adsorption parameters. ANOVA analysis of the P-value of individuals and combined variables was significant due to a P-value of less than 0.05 and a higher F-value. Equilibrium results show a monolayer isotherm model by Langmuir isotherm model with a maximum CV uptake capacity of 487 mg g<sup>−1</sup> under optimized conditions (250 mg adsorbent dosage, 10 ppm concentration, 30 min contact time and pH 6.0). Kinetic studies revealed that CV removal was nominated by the pseudo-second-order (PSO) model. CV dye molecules were adsorbed onto FA/Melamine composite via electrostatic attractions dipole–dipole interactions and n-π stacking interactions. Furthermore, the obtained results exposed that the synthesized FA/Melamine composite can be assessed as a promising sorbent for CV dye removal with high adsorption capacity.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101056"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The hidden threat of microplastics in urban freshwater ecosystem: A comprehensive review 微塑料在城市淡水生态系统中的潜在威胁：综述

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2025-02-16 DOI: 10.1016/j.enmm.2025.101054

Md. Fahim Murshed, Nusrat Fardin Arpita, Amit Hasan Anik, Maisha Binte Sultan

Microplastic (MP) pollution has become a pressing environmental issue, particularly in urban freshwater ecosystems, where it poses significant risks to water quality and public health. By integrating new data and insights, this article aims to deepen the understanding of MP contamination in urban freshwater ecosystems and its broader environmental implications. This article reviews the current literature of MPs focusing on urban freshwater ecosystems, often overlooked in favor of marine settings. It uniquely addresses the sources, pathways, and biomagnification of MPs in these environments, linking ecological effects to public health, and advocating for collaborative stakeholder action and innovative management strategies. This holistic approach provides a comprehensive view of MP pollution in urban contexts where aquatic organisms can ingest MPs present in these freshwater ecosystems and move through the food chain thus ultimately reaching the human body. The effects of MPs on the food chain are examined, particularly how they accumulate in organisms, transfer between different levels of the food chain, and increase in concentration as they move up through different trophic levels. To successfully tackle MP contamination, it pushes for collaborative action among stakeholders, including researchers, policymakers, and the community. It calls for enhanced research efforts to fill existing knowledge gaps and develop innovative management strategies to mitigate the impacts of MPs. Ultimately, this serves as a crucial resource for informing future policies and initiatives to preserve water quality and protect public health in the face of growing plastic pollution.

微塑料污染已成为一个紧迫的环境问题，特别是在城市淡水生态系统中，它对水质和公众健康构成重大风险。通过整合新的数据和见解，本文旨在加深对城市淡水生态系统中MP污染及其更广泛的环境影响的理解。这篇文章回顾了目前的文献MPs关注城市淡水生态系统，往往被忽视，有利于海洋环境。它独特地解决了这些环境中MPs的来源、途径和生物放大，将生态影响与公共卫生联系起来，并倡导利益相关者的协作行动和创新的管理战略。这种整体的方法提供了城市环境中多聚物污染的全面视图，水生生物可以摄取这些淡水生态系统中存在的多聚物，并通过食物链移动，最终到达人体。研究了MPs对食物链的影响，特别是它们如何在生物体中积累，在食物链的不同层次之间转移，以及随着它们在不同营养水平上的上升而浓度增加。为了成功地解决MP污染问题，它推动了利益相关者之间的合作行动，包括研究人员、政策制定者和社区。它呼吁加强研究工作，以填补现有的知识空白，并制定创新的管理战略，以减轻下院议员的影响。最终，面对日益严重的塑料污染，这将成为为未来政策和举措提供信息的关键资源，以保护水质和保护公众健康。

{"title":"The hidden threat of microplastics in urban freshwater ecosystem: A comprehensive review","authors":"Md. Fahim Murshed, Nusrat Fardin Arpita, Amit Hasan Anik, Maisha Binte Sultan","doi":"10.1016/j.enmm.2025.101054","DOIUrl":"10.1016/j.enmm.2025.101054","url":null,"abstract":"<div><div>Microplastic (MP) pollution has become a pressing environmental issue, particularly in urban freshwater ecosystems, where it poses significant risks to water quality and public health. By integrating new data and insights, this article aims to deepen the understanding of MP contamination in urban freshwater ecosystems and its broader environmental implications. This article reviews the current literature of MPs focusing on urban freshwater ecosystems, often overlooked in favor of marine settings. It uniquely addresses the sources, pathways, and biomagnification of MPs in these environments, linking ecological effects to public health, and advocating for collaborative stakeholder action and innovative management strategies. This holistic approach provides a comprehensive view of MP pollution in urban contexts where aquatic organisms can ingest MPs present in these freshwater ecosystems and move through the food chain thus ultimately reaching the human body. The effects of MPs on the food chain are examined, particularly how they accumulate in organisms, transfer between different levels of the food chain, and increase in concentration as they move up through different trophic levels. To successfully tackle MP contamination, it pushes for collaborative action among stakeholders, including researchers, policymakers, and the community. It calls for enhanced research efforts to fill existing knowledge gaps and develop innovative management strategies to mitigate the impacts of MPs. Ultimately, this serves as a crucial resource for informing future policies and initiatives to preserve water quality and protect public health in the face of growing plastic pollution.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101054"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of Congo red adsorption using oxidated nitrogen-doped carbon nanotubes 氧化氮掺杂碳纳米管增强刚果红吸附

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-06-01 Epub Date: 2024-12-16 DOI: 10.1016/j.enmm.2024.101037

Alicia E. Chávez-Guajardo , Luis Octavio Solis-Sanchez , María Medina-Llamas , Brenda I. Orea-Calderón , Florentino López-Urías , Emilio Muñoz-Sandoval , Verónica L. Medina-Llamas

This work reports the synthesis of nitrogen-doped multilayer carbon nanotubes (N-MWCNTs). The N-MWCNTs were subjected to mild oxidation in air at different temperatures and exposure times to obtain a variety of composites from N-MWCNTs with iron oxide nanoparticles up to mainly nanostructured hematite in its alpha phase (α-Fe₂O₃). X-ray diffraction allowed us to track the transformation path of the N-MWCNTs have a cross oxidation time. Each composite was fully characterized. FTIR analysis revealed that the oxidated N-MWCNTs exhibited a high content of carboxylic and carbonyl functional groups. Raman spectroscopy characterization shows a decrease in the D-band intensity and an increase in the 2D-band intensity as the oxidation temperature and oxidation time increase. For instance, the 5 min oxidized N-MWCNTs at 620 °C show a 3 % decrease in both the I_D/I_G and I_2D/I_G ratios. At 10 min at 620 °C, a 10 % decrease in the I_D/I_G ratio and a 15 % increase in the I_2D/I_G ratio were observed. The former results indicate the opening of the CNTs tips and the exposure of the graphitic layers as oxidation time increases. The TEM micrographs can easily corroborate the former trends. The performance of the pristine and oxidized N-MWCNTs was evaluated for the adsorption of Congo red (CR) as a model pollutant. The results indicate that mild oxidation temperatures (620 °C) and short oxidation times favor CR adsorption with a faster adsorption equilibrium than pristine N-MWCNTs. The percentage removal of pristine N-MWCNTS was 33 %. The oxidized samples at 620 °C had a higher adsorption removal of CR up to 36 % and 43 % when oxidation time was 5 and 10 min. The results demonstrate that oxidation thermal treatment reduces amorphous carbon and promotes the opening of the CNTs, increasing the active sites on the surface of the material, which facilitates interaction with CR.

本文报道了氮掺杂多层碳纳米管（N-MWCNTs）的合成。将N-MWCNTs在不同温度和暴露时间的空气中进行轻度氧化，得到从N-MWCNTs与氧化铁纳米颗粒到主要为α相（α-Fe2O3）的纳米结构赤铁矿的各种复合材料。x射线衍射使我们能够跟踪N-MWCNTs的转变路径，并具有交叉氧化时间。每种复合材料都被充分表征。FTIR分析显示，氧化的N-MWCNTs具有高含量的羧基和羰基官能团。拉曼光谱表征表明，随着氧化温度和氧化时间的增加，d波段强度降低，2d波段强度增加。例如，在620℃下氧化5分钟的N-MWCNTs，其ID/IG和I2D/IG比值均下降了3%。在620°C下加热10 min，观察到ID/IG比降低10%，I2D/IG比增加15%。前者的结果表明，随着氧化时间的增加，碳纳米管尖端的开口和石墨层的暴露增加。TEM显微图可以很容易地证实前一趋势。研究了原始N-MWCNTs和氧化N-MWCNTs对刚果红（CR）的吸附性能。结果表明，较低的氧化温度（620°C）和较短的氧化时间有利于CR的吸附，吸附平衡比原始N-MWCNTs更快。原始N-MWCNTS的去除率为33%。当氧化时间为5 min和10 min时，620℃下氧化样品对CR的吸附去除率分别高达36%和43%。结果表明，氧化热处理减少了非晶态碳，促进了CNTs的打开，增加了材料表面的活性位点，有利于与CR的相互作用。

{"title":"Enhancement of Congo red adsorption using oxidated nitrogen-doped carbon nanotubes","authors":"Alicia E. Chávez-Guajardo , Luis Octavio Solis-Sanchez , María Medina-Llamas , Brenda I. Orea-Calderón , Florentino López-Urías , Emilio Muñoz-Sandoval , Verónica L. Medina-Llamas","doi":"10.1016/j.enmm.2024.101037","DOIUrl":"10.1016/j.enmm.2024.101037","url":null,"abstract":"<div><div>This work reports the synthesis of nitrogen-doped multilayer carbon nanotubes (N-MWCNTs). The N-MWCNTs were subjected to mild oxidation in air at different temperatures and exposure times to obtain a variety of composites from N-MWCNTs with iron oxide nanoparticles up to mainly nanostructured hematite in its alpha phase (α-Fe<sub>2</sub>O<sub>3</sub>). X-ray diffraction allowed us to track the transformation path of the N-MWCNTs have a cross oxidation time. Each composite was fully characterized. FTIR analysis revealed that the oxidated N-MWCNTs exhibited a high content of carboxylic and carbonyl functional groups. Raman spectroscopy characterization shows a decrease in the D-band intensity and an increase in the 2D-band intensity as the oxidation temperature and oxidation time increase. For instance, the 5 min oxidized N-MWCNTs at 620 °C show a 3 % decrease in both the I<sub>D</sub>/I<sub>G</sub> and I<sub>2D</sub>/I<sub>G</sub> ratios. At 10 min at 620 °C, a 10 % decrease in the I<sub>D</sub>/I<sub>G</sub> ratio and a 15 % increase in the I<sub>2D</sub>/I<sub>G</sub> ratio were observed. The former results indicate the opening of the CNTs tips and the exposure of the graphitic layers as oxidation time increases. The TEM micrographs can easily corroborate the former trends. The performance of the pristine and oxidized N-MWCNTs was evaluated for the adsorption of Congo red (CR) as a model pollutant. The results indicate that mild oxidation temperatures (620 °C) and short oxidation times favor CR adsorption with a faster adsorption equilibrium than pristine N-MWCNTs. The percentage removal of pristine N-MWCNTS was 33 %. The oxidized samples at 620 °C had a higher adsorption removal of CR up to 36 % and 43 % when oxidation time was 5 and 10 min. The results demonstrate that oxidation thermal treatment reduces amorphous carbon and promotes the opening of the CNTs, increasing the active sites on the surface of the material, which facilitates interaction with CR.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101037"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0