Environmental Nanotechnology, Monitoring and Management最新文献

Performance by design of TiO2 nanostructured granules exploitable in water remediation applications

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub 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.

{"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":"2025-04-21","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

Potentially toxic elements and geochemical signatures in sediments and soils from Biritiba-Mirim reservoir, Brazil

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-04-18 DOI: 10.1016/j.enmm.2025.101070

Pedro do Nascimento Gonçalves , Sandra Regina Damatto , Thiago Costa Silva , Lúcio Leonardo , Lucilena Rebelo Monteiro , Marcos Antônio Scapin , Marycel Elena Barboza Cotrim

This study evaluated potentially toxic elements (PTEs) – V, Cr, Ni, Cu, Zn, Pb, As, Sb, and Co – in sediment cores and surface soils from the Biritiba-Mirim reservoir in Brazil. The study investigated the influence of nearby soil on the sediments in the reservoir, the accumulation of PTEs in the sediment core layers, and enrichment factors from anthropogenic or natural sources. The methodology focused on the geochemical and physico-chemical characteristics of soils and sediment. The results compose a database with regional interest in the environmental quality of a relevant water supply system for Brazil’s most populous city, as well as to international researchers studying the geochemistry of trace elements in dam reservoir environments. The mean PTEs concentrations, in mg/kg, found in soils and sediments, respectively, were V (116 | 214), Cr (32.7 | 52.8), Ni (7.9 | 13.9), Cu (58 | 65), Zn (61 | 57), Pb (69 | 74), As (5.6 | 25.7), Sb (0.39 | 0.90), and Co (1.97 | 3.40). The study hypothesized arsenic enrichment near sediment core transition zones, with positive correlations between As with Sediment Erosion Flux (SEF), indicating the impact of reservoir flooding on the sediment quality. Signatures of chemical correlation were found between reservoir sediments and catchment soils, which presented signs of copper and lead enhanced by anthropogenic release.

{"title":"Potentially toxic elements and geochemical signatures in sediments and soils from Biritiba-Mirim reservoir, Brazil","authors":"Pedro do Nascimento Gonçalves , Sandra Regina Damatto , Thiago Costa Silva , Lúcio Leonardo , Lucilena Rebelo Monteiro , Marcos Antônio Scapin , Marycel Elena Barboza Cotrim","doi":"10.1016/j.enmm.2025.101070","DOIUrl":"10.1016/j.enmm.2025.101070","url":null,"abstract":"<div><div>This study evaluated potentially toxic elements (PTEs) – V, Cr, Ni, Cu, Zn, Pb, As, Sb, and Co – in sediment cores and surface soils from the Biritiba-Mirim reservoir in Brazil. The study investigated the influence of nearby soil on the sediments in the reservoir, the accumulation of PTEs in the sediment core layers, and enrichment factors from anthropogenic or natural sources. The methodology focused on the geochemical and physico-chemical characteristics of soils and sediment. The results compose a database with regional interest in the environmental quality of a relevant water supply system for Brazil’s most populous city, as well as to international researchers studying the geochemistry of trace elements in dam reservoir environments. The mean PTEs concentrations, in mg/kg, found in soils and sediments, respectively, were V (116 | 214), Cr (32.7 | 52.8), Ni (7.9 | 13.9), Cu (58 | 65), Zn (61 | 57), Pb (69 | 74), As (5.6 | 25.7), Sb (0.39 | 0.90), and Co (1.97 | 3.40). The study hypothesized arsenic enrichment near sediment core transition zones, with positive correlations between As with Sediment Erosion Flux (SEF), indicating the impact of reservoir flooding on the sediment quality. Signatures of chemical correlation were found between reservoir sediments and catchment soils, which presented signs of copper and lead enhanced by anthropogenic release.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101070"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850206","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

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub 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.

{"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":"2025-04-12","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

Nanoparticle based antigen detection of norovirus in human faecal samples: A proof-of-concept study

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub 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.

{"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":"2025-04-11","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

Radioactivity in surface soil and water around the Valliyaru river

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-04-10 DOI: 10.1016/j.enmm.2025.101068

Vinod Kumar K.P. , Kumar A. , Karthik B.

Gross alpha and beta radiations for the samples of soil and water collected from the Valliyaru river in southern India were determined. Alpha radiation counting system, RC 605A for measuring gross alpha values was employed that revealed a maximum value of 0.843 Bq/L and 12491 Bq/Kg in water and soil respectively. Beta counting system, BCS 36A had given a maximum value of 0.32 Bq/L and 58594 Bq/Kg for water and soil respectively. Gamma determination was detected by IdentiFINDER-X that showed a maximum value of 3.78 µSv/h. These high values pertaining to radiations were prevailing only at Kadiapattanam village in Tamil Nadu, India, where the river confluences with the sea. Cluster analysis and the hierarchical dendrogram identify two distinct groups of radioactivity within the dataset: one near the sea and the other along various sites along the course of the Valliyaru River. Heat map analysis revealed that radioactivity of water and soil are correlated positively. One-way Anova results reflected that the radioactivity values are statistically different for soil and water. Annual effective doses (AED) and excess lifetime cancer risk (ELCR) were also computed that reflected safe levels at sites other than Kadiapattanam. The investigation revealed that upstream sites are within safe limits, whereas at the place of confluence with the sea, radioactivity values exceed beyond permissible limits.

{"title":"Radioactivity in surface soil and water around the Valliyaru river","authors":"Vinod Kumar K.P. , Kumar A. , Karthik B.","doi":"10.1016/j.enmm.2025.101068","DOIUrl":"10.1016/j.enmm.2025.101068","url":null,"abstract":"<div><div>Gross alpha and beta radiations for the samples of soil and water collected from the Valliyaru river in southern India were determined. Alpha radiation counting system, RC 605A for measuring gross alpha values was employed that revealed a maximum value of 0.843 Bq/L and 12491 Bq/Kg in water and soil respectively. Beta counting system, BCS 36A had given a maximum value of 0.32 Bq/L and 58594 Bq/Kg for water and soil respectively. Gamma determination was detected by IdentiFINDER-X that showed a maximum value of 3.78 µSv/h. These high values pertaining to radiations were prevailing only at Kadiapattanam village in Tamil Nadu, India, where the river confluences with the sea. Cluster analysis and the hierarchical dendrogram identify two distinct groups of radioactivity within the dataset: one near the sea and the other along various sites along the course of the Valliyaru River. Heat map analysis revealed that radioactivity of water and soil are correlated positively. One-way Anova results reflected that the radioactivity values are statistically different for soil and water. Annual effective doses (AED) and excess lifetime cancer risk (ELCR) were also computed that reflected safe levels at sites other than Kadiapattanam. The investigation revealed that upstream sites are within safe limits, whereas at the place of confluence with the sea, radioactivity values exceed beyond permissible limits.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101068"},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823995","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

Micro-nanobubble assisted photocatalytic and antibacterial activity of ZnFe2O4/g-C3N4/rGO nanocomposite

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-04-03 DOI: 10.1016/j.enmm.2025.101065

Sutthida Wongwichian , Ranjith Rajendran , Orawan Rojviroon , Priyadharsan Arumugam , Sanya Sirivithayapakorn , Thammasak Rojviroon

Addressing the ongoing challenge of water pollution by synthetic dyes requires advanced approaches. This study examines the improved degradation of Indigo Carmine (IC) dye using a ternary nanocomposite made of ZnFe₂O₄, g-C₃N₄, and reduced graphene oxide (rGO), in combination with micro-nanobubble technology. The nanocomposite was synthesized using hydrothermal method, promoting effective interaction between ZnFe₂O₄, g-C₃N₄, and rGO, which enhances photocatalytic performance. The ZnFe₂O₄/g-C₃N₄/rGO nanocomposite (ZGR NCs) exhibited a 92 % degradation efficiency of IC dye within 60 min, significantly outperforming ZnFe₂O₄ (49 %), ZG (59 %), ZR (64 %), and ZGR without MNB (72 %). The photocatalytic process followed pseudo-first-order kinetics with a high correlation coefficient (R² ∼ 0.9789–0.9968), demonstrating the efficiency of charge separation and transfer facilitated by rGO. ZnFe₂O₄ excels in absorbing visible light, g-C₃N₄ serves as a capable photocatalyst with a suitable bandgap for visible light, and rGO further facilitates electron mobility, minimizing charge recombination. Also, the combination of ZnFe₂O₄, rGO, and g-C₃N₄ generates a synergistic effect that significantly boosts photocatalytic activity. This interaction leads to more effective production of reactive oxygen species, which are essential for degrading pollutants. The nanocomposite also exhibited excellent reusability, retaining 88 % of its initial efficiency after five cycles. Additionally, antibacterial studies revealed strong inhibition zones against Streptococcus mutans (18–22 mm) and Enterococcus faecalis (14–20 mm), attributed to ROS-induced bacterial membrane disruption. These findings highlight the multifunctionality of the ZGR nanocomposite-micro-nanobubble (MNBs) system, offering a promising approach for sustainable wastewater treatment and antibacterial applications.

解决合成染料对水污染的持续挑战需要先进的方法。本研究利用由 ZnFe2O4、g-C3N4 和还原氧化石墨烯（rGO）组成的三元纳米复合材料，结合微纳米气泡技术，研究了如何改善靛蓝（IC）染料的降解。该纳米复合材料采用水热法合成，促进了 ZnFe2O4、g-C3N4 和 rGO 之间的有效相互作用，从而提高了光催化性能。ZnFe2O4/g-C3N4/rGO 纳米复合材料（ZGR NCs）在 60 分钟内对 IC 染料的降解效率达到 92%，明显优于 ZnFe2O4（49%）、ZG（59%）、ZR（64%）和不含 MNB 的 ZGR（72%）。光催化过程遵循伪一阶动力学，相关系数很高（R2 ∼ 0.9789-0.9968），表明 rGO 促进了电荷分离和转移的效率。ZnFe2O4 擅长吸收可见光，g-C3N4 可作为光催化剂，具有适合可见光的带隙，而 rGO 则进一步促进了电子迁移，最大限度地减少了电荷重组。此外，ZnFe2O4、rGO 和 g-C3N4 的组合还能产生协同效应，显著提高光催化活性。这种相互作用能更有效地产生活性氧，而活性氧对降解污染物至关重要。这种纳米复合材料还表现出极佳的可重复使用性，在循环使用五个周期后，其初始效率仍能保持 88%。此外，抗菌研究显示，纳米复合材料对变异链球菌（18-22 毫米）和粪肠球菌（14-20 毫米）有很强的抑制作用，这归因于活性氧诱导的细菌膜破坏。这些发现凸显了 ZGR 纳米复合材料-微纳米气泡（MNBs）系统的多功能性，为可持续废水处理和抗菌应用提供了一种前景广阔的方法。

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引用次数: 0

Highly sensitive electrochemical sensing of fipronil using a ZnO/Graphene@C-dots hybrid nanocomposite

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-04-03 DOI: 10.1016/j.enmm.2025.101067

La Ode Agus Salim , Paulina Taba , Muhammad Zakir , Muhammad Nurdin , Abdul Wahid Wahab , Dahlang Tahir , St. Fauziah , Akrajas Ali Umar

This study presents the development of a novel electrochemical sensor for the ultrasensitive detection of fipronil, a widely used pesticide, utilizing a hybrid nanocomposite material consisting of graphene (Gr), zinc oxide nanorods (ZnO NR), and carbon dots (C-dots). The hybrid nanocomposite, GZC (Graphene-ZnO@C-dots), was synthesized through a microwave-assisted method, leveraging the distinct physicochemical properties of each component to significantly enhance sensor performance. Electrochemical analysis conducted via cyclic voltammetry (CV) revealed a marked improvement in electron transfer efficiency and redox behavior compared to unmodified graphene electrodes, attributed to the synergistic interaction among ZnO NR, C-dots, and graphene. The GZC-based electrode demonstrated exceptional sensitivity in detecting fipronil, achieving an impressively low limit of detection (LOD) of 0.00490 µg/L and a limit of quantification (LOQ) of 0.01633 µg/L, outperforming numerous previously reported sensors. A strong linear correlation (R² = 0.9931) was observed between the oxidation peak current and fipronil concentration, indicating excellent analytical performance. Additionally, the sensor exhibited high stability and reproducibility, with a relative standard deviation (RSD) of 0.26 % over 20 consecutive measurements. Validation using a commercial pesticide sample confirmed the sensor’s ability to detect fipronil at trace levels with high accuracy. Moreover, the Horwitz Ratio (HorRat) of 0.024 underscores the superior reproducibility of the sensor, well below the theoretical threshold. The GZC nanocomposite electrode provides a reliable, efficient, and highly sensitive platform for detecting fipronil in environmental samples, showcasing its potential in environmental monitoring to enhance food safety and environmental health through early pesticide residue detection.

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引用次数: 0

Green synthesis of metal oxide nanoparticles using plant extracts: A sustainable approach to combat antimicrobial resistance

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-04-03 DOI: 10.1016/j.enmm.2025.101066

Sathyabama Balaji , Muthu Senthil Pandian , Ramasamy Ganesamoorthy , Thirugnanasambandham Karchiyappan

The green synthesis of metal oxide nanoparticles using plant extracts has emerged as a sustainable and eco-friendly approach to combat antimicrobial resistance. Bio-inspired synthesis is an innovative approach miming natural processes to create advanced materials with unique properties. This method leverages biological principles and templates to guide the synthesis of nanoparticles, polymers, and other materials. The resulting materials often exhibit enhanced performance, biocompatibility, and sustainability. This method leverages the natural reducing, capping, and stabilizing agents found in plant extracts to synthesize nanoparticles, avoiding the use of hazardous chemicals. This study explores the bio-inspired synthesis of metallic and non-metallic nanoparticles, focusing on their potential application bio-inspireds in various fields, including medicine, energy storage, and environmental remediation. By understanding and replicating nature’s strategies, bio-inspired synthesis offers a promising pathway to develop next-generation materials with improved functionality and reduced environmental impact. The development of nanoparticles (NPs) having antibacterial action, like metal oxide nanoparticles (MONPs), is made possible by nanotechnology. Because MONPs can interact with multiple biological components and suppress microbial growth, they offer a potential solution to overcome pathogenicity or antimicrobial resistance. The overview of the review provides burgeoning research surrounding the green synthesis of different nanoparticles utilizing various plant extracts. It provides the antimicrobial efficacy of nanoparticles, including zinc oxide (ZnO), titanium dioxide (TiO₂), iron oxide (FeO), copper oxide (CuO), and nickel oxide (NiO), at different concentrations against different bacterial strains. Furthermore, the mechanism underlying the antimicrobial activity of these nanoparticles was discussed. The findings underscore the importance of sustainable nanotechnology in developing effective antimicrobial agents and promoting environmental sustainability.

利用植物提取物绿色合成金属氧化物纳米粒子已成为一种可持续的生态友好型抗菌方法。生物启发合成是一种模仿自然过程的创新方法，用于制造具有独特性能的先进材料。这种方法利用生物原理和模板来指导纳米粒子、聚合物和其他材料的合成。合成的材料通常具有更高的性能、生物相容性和可持续性。这种方法利用植物提取物中的天然还原剂、封盖剂和稳定剂合成纳米粒子，避免了有害化学物质的使用。本研究探讨了受生物启发合成金属和非金属纳米粒子的方法，重点关注生物启发在医药、能源储存和环境修复等多个领域的潜在应用。通过理解和复制自然界的策略，生物启发合成为开发功能更强、环境影响更小的下一代材料提供了一条前景广阔的途径。纳米技术使具有抗菌作用的纳米粒子（NPs）（如金属氧化物纳米粒子（MONPs））的开发成为可能。由于 MONPs 可与多种生物成分相互作用并抑制微生物生长，因此为克服致病性或抗菌药耐药性提供了潜在的解决方案。综述介绍了围绕利用各种植物提取物绿色合成不同纳米粒子的新兴研究。综述介绍了不同浓度的纳米粒子（包括氧化锌（ZnO）、二氧化钛（TiO2）、氧化铁（FeO）、氧化铜（CuO）和氧化镍（NiO））对不同细菌菌株的抗菌功效。此外，还讨论了这些纳米粒子的抗菌活性机理。研究结果强调了可持续纳米技术在开发有效抗菌剂和促进环境可持续性方面的重要性。

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引用次数: 0

Removal of Cu and Co ions form polluted water via Bi-TiO2 loaded on g-C3N4 nanostructures

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-03-25 DOI: 10.1016/j.enmm.2025.101063

Abueliz Modwi , Ahmed Algarni , Ibrahim Sulaiman Almuzaini , Abdulaziz I. Alromaeh , Fahad Ibrahim Alghuraybi , Tahani M. Alresheedi , Abdulaziz A. Alharbi

This study surveys the impact of Bi@TiO₂ on the separate and combined adsorption of Cu (II) and Co (II) heavy metals in a water-based solution using g-C₃N₄ nanosheets. The Bi@TiO₂@CN nanostructures are effectively produced using the sol–gel technique and ultrasound method. The manufactured materials of Bi@TiO₂@CN are confirmed by SEM, EDX, XRD, FTIR, and XPS characterizations. The BET surface area was 45.43 m²/g, and the pore size distribution is 1.5406 nm. Nanostructures exhibit significant adsorption capabilities for Cu (II) (562.7 mg/g) and Co (II) (547 mg/g) after 24 h under optimum experimental conditions. The adsorption isotherm models have a strong agreement with the Langmuir isotherm, while the investigation on kinetics model fitting demonstrates an excellent fit with the pseudo-second-order. Furthermore, the adsorbent composite was regenerated in four cycles without loss of efficiency or stability. This study offers valuable insights into the significance of Bi@TiO₂@CN nanostructures in achieving extremely efficient, fast, and simultaneous removal of heavy metals.

{"title":"Removal of Cu and Co ions form polluted water via Bi-TiO2 loaded on g-C3N4 nanostructures","authors":"Abueliz Modwi , Ahmed Algarni , Ibrahim Sulaiman Almuzaini , Abdulaziz I. Alromaeh , Fahad Ibrahim Alghuraybi , Tahani M. Alresheedi , Abdulaziz A. Alharbi","doi":"10.1016/j.enmm.2025.101063","DOIUrl":"10.1016/j.enmm.2025.101063","url":null,"abstract":"<div><div>This study surveys the impact of Bi@TiO<sub>2</sub> on the separate and combined adsorption of Cu (II) and Co (II) heavy metals in a water-based solution using g-C<sub>3</sub>N<sub>4</sub> nanosheets. The Bi@TiO<sub>2</sub>@CN nanostructures are effectively produced using the sol–gel technique and ultrasound method. The manufactured materials of Bi@TiO<sub>2</sub>@CN are confirmed by SEM, EDX, XRD, FTIR, and XPS characterizations. The BET surface area was 45.43 m<sup>2</sup>/g, and the pore size distribution is 1.5406 nm. Nanostructures exhibit significant adsorption capabilities for Cu (II) (562.7 mg/g) and Co (II) (547 mg/g) after 24 h under optimum experimental conditions. The adsorption isotherm models have a strong agreement with the Langmuir isotherm, while the investigation on kinetics model fitting demonstrates an excellent fit with the pseudo-second-order. Furthermore, the adsorbent composite was regenerated in four cycles without loss of efficiency or stability. This study offers valuable insights into the significance of Bi@TiO<sub>2</sub>@CN nanostructures in achieving extremely efficient, fast, and simultaneous removal of heavy metals.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101063"},"PeriodicalIF":0.0,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715420","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

Nanotechnology in textiles: Environmental safety and sustainable practices

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-03-20 DOI: 10.1016/j.enmm.2025.101062

Sunita Boruah , Seiko Jose

Incorporation of nanoparticles into textiles brings significant functional properties while maintaining flexibility. Today, nano textiles are employed in various sectors such as sports, healthcare, and protection. Nonetheless, nanotechnology is seen to have the ability to change the current status of technologies dramatically; there is concern about its effects on the human and environment. The first part lays down the basics of nanoparticles’ toxicology while stressing that future studies must fully characterize nanoparticles and how they interact, become bioactive, and pose threats to humans and the environment. This review article discusses the environmental and safety aspects of nanomaterials while incorporating in textiles. The current regulations regarding nanomaterials in textiles such as REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals), EPA (Environmental Protection Agency), and OSHA (Occupational Safety and Health Administration) highlight the need for processes covering and measuring nanoparticles is focused. Also, it considers the integration of green nanotechnology, provides recommendations for the safe usage of nanotechnology to eradicate negative outcomes on the environment, and suggests the use of natural and recyclable items. By illustration of real-life applications, the review shows that sustainability and applicability of nanoparticles could go hand in hand for further developments such as smart and responsive textiles, as well as catering to the future aspects of nanotechnology in textiles.

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引用次数: 0