Environmental Nanotechnology, Monitoring and Management最新文献_第2页

Influence of acid route on chitosan nanoparticle formation: Physicochemical properties and application in methylene blue adsorption 酸途径对壳聚糖纳米颗粒形成的影响：理化性质及其在亚甲基蓝吸附中的应用

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-14 DOI: 10.1016/j.enmm.2026.101122

Eliane Merklein , Amanda S.M. de Freitas , Rafael A. Franco , Marystela Ferreira

In this study, chitosan nanoparticles (NC) were synthesized using two different acidic routes acetic acid (AA) and methacrylic acid (MA) employed as solubilizing agents and pH controllers. The resulting NC were characterized by dynamic light scattering (DLS), nanoparticle tracking analysis (NTA), atomic force microscopy (AFM), transmission electron microscopy (TEM), and Fourier-transform infrared spectroscopy (FTIR) to evaluate the influence of acid type on nanoparticle formation, morphology, and colloidal stability. The AA route produced nanoparticles with an average hydrodynamic diameter of 166 ± 4 nm and zeta potential of 21 ± 1 mV, whereas MA-derived NC exhibited a core–shell-like morphology, larger particle size 178 ± 3 nm, and enhanced electrostatic stability. Accelerated stability assays, including temperature variation, UV-C irradiation, and long-term storage, demonstrated superior stability for MA-based NC over 90 days. Adsorption-desorption experiments using methylene blue, monitored by UV–Vis spectroscopy, revealed NC derived from MA a maximum adsorption capacity of 65 % (3.25 mg/L) of the dye in relation to the initial concentration (5 mg/L), with a regeneration efficiency of 81 % (2.63 mg/L), indicating the potential for reuse of NCMA. Overall, the results demonstrate that acid-controlled synthesis plays a key role in governing the physicochemical properties and interfacial electrostatic interactions of chitosan nanoparticles, directly impacting their adsorption performance and regeneration behavior. These findings highlight the potential of chitosan nanoparticles as efficient, stable, and regenerable nanoadsorbents for water treatment applications.

本研究以乙酸（AA）和甲基丙烯酸（MA）为增溶剂和pH控制剂，通过两种不同的酸性途径合成了壳聚糖纳米颗粒（NC）。采用动态光散射（DLS）、纳米颗粒跟踪分析（NTA）、原子力显微镜（AFM）、透射电子显微镜（TEM）和傅里叶变换红外光谱（FTIR）对纳米颗粒的形成、形貌和胶体稳定性进行了表征，以评估酸类型对纳米颗粒形成、形貌和胶体稳定性的影响。AA途径制备的纳米颗粒平均水动力直径为166±4 nm， zeta电位为21±1 mV，而ma途径制备的NC具有核壳状形貌，粒径较大（178±3 nm），静电稳定性增强。加速稳定性试验，包括温度变化、UV-C照射和长期储存，证明了ma基NC在90天以上的优越稳定性。亚甲基蓝吸附-解吸实验，紫外-可见光谱监测显示，相对于初始浓度（5 mg/L）， MA衍生的NC对染料的最大吸附量为65% (3.25 mg/L)，再生效率为81% (2.63 mg/L)，表明NCMA的再利用潜力。综上所述，酸控合成对壳聚糖纳米颗粒的物理化学性质和界面静电相互作用起着关键作用，直接影响其吸附性能和再生行为。这些发现突出了壳聚糖纳米颗粒作为高效、稳定和可再生的水处理纳米吸附剂的潜力。

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引用次数: 0

Green Coffee-Mediated Biofabrication of silver Nanoparticles: Process optimization for heavy metal removal coupled antimicrobial applications in tannery wastewater 绿咖啡介导的纳米银生物制备：制革厂废水中重金属去除的工艺优化

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-12 DOI: 10.1016/j.enmm.2025.101115

Marwa E. El-Sesy , Sabah S. Ibrahim , Shereen shoieb Yousif , Yadong Zhao

An environmentally friendly approach for the synthesis of silver nanoparticles (AgNPs) using green Coffee (g-Coffee) bean extract as an eco-friendly reducing and stabilizing agent is presented herein. The synthesized Ag/g-Coffee nanoparticles were employed to remove Cr⁶⁺ and Mn²⁺ ions from aqueous solutions, and their antimicrobial activity was also evaluated. The successful synthesis was verified via UV–Vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM) characterization. The results revealed that the Ag/g-Coffee nanoparticles achieved adsorption capacities of 79 mg/g for Cr(VI) and 85 mg/g for Mn(II), as confirmed by EDX and elemental mapping. The kinetic data fitted well in a pseudo-second-order kinetic model, as deduced from R² values (0.999 for Mn²⁺ and 0.989 for Cr⁶⁺), which was further confirmed with statistical validation using root mean square error (RMSE), mean absolute error (MAE), and mean square error (MSE). pH 6, 3 g/L adsorbent dosage, 90 min contact time, and 100 mg/L initial metal concentration were determined to be the optimal conditions using a Central Composite Design optimization technique. Nanoparticles exhibited high antimicrobial activity against Yersinia enterocolitica MZ673567.1 and Staphylococcus aureus PV910481 and showed very good regeneration ability up to four successive cycles. Application to real tannery wastewater removal resulted in 98 % removal efficiency for Cr⁶⁺ and 93 % removal efficiency for Mn²⁺ ions with additional decreases in Cu, Ni, and Zn. This study demonstrates the promising potential of bio-fabricated Ag/g-Coffee nanoparticles as efficient, eco-friendly agents of environmental remediation and antimicrobial applications in industrial wastewater treatment.

本文介绍了一种以绿咖啡（g-Coffee）豆提取物为环保还原剂合成纳米银粒子（AgNPs）的方法。将合成的Ag/g-Coffee纳米粒子用于去除水溶液中的Cr6+和Mn2+离子，并对其抗菌活性进行了评价。通过紫外可见光谱（UV-Vis）、傅里叶变换红外光谱（FTIR）和透射电子显微镜（TEM）表征验证了合成的成功。结果表明，Ag/g- coffee纳米颗粒对Cr（VI）的吸附量为79 mg/g，对Mn（II）的吸附量为85 mg/g。根据R2值（Mn2+为0.999，Cr 26 +为0.989）推导出的动力学数据与拟二阶动力学模型拟合良好，并通过均方根误差（RMSE）、平均绝对误差（MAE）和均方误差（MSE）进行了统计验证。采用中心复合设计优化技术确定了pH为6、吸附剂用量为3 g/L、接触时间为90 min、初始金属浓度为100 mg/L的最佳条件。纳米颗粒对小肠结肠炎耶尔森菌MZ673567.1和金黄色葡萄球菌PV910481具有较高的抗菌活性，并且在连续4个循环中表现出良好的再生能力。应用于实际制革废水中，Cr 26 +的去除率为98%，Mn2+的去除率为93%，同时Cu、Ni和Zn的去除率进一步降低。该研究表明，生物制备银/g-咖啡纳米颗粒作为高效、环保的环境修复剂和抗菌剂在工业废水处理中的应用前景广阔。

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引用次数: 0

Monitoring advanced oxidation processes’ efficiency via fluorescence loss in carbon quantum dots 利用碳量子点的荧光损失监测高级氧化过程的效率

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-09 DOI: 10.1016/j.enmm.2026.101120

Roman Belykh, Vered Cohen-Yaniv, Hadas Mamane

Carbon quantum dots (CQDs) synthesized from ammonium citrate were investigated as fluorescence-based probes for assessing ultraviolet (UV) fluence and hydroxyl radicals (•OH) in advanced oxidation processes (AOPs). CQDs characterized through fluorescence spectroscopy showed two distinct emission bands at 440 nm and 520 nm, corresponding to the monomeric and agglomerated forms of citrazinic acid (CZA), respectively. Under low-pressure (LP) mercury lamp irradiation, CQDs exhibited fluorescence loss that was significantly enhanced in the presence of hydrogen peroxide. Dose–response analysis identified three distinct processes: the monomer (440 nm) reaction followed Langmuir-Hinshelwood (L-H) kinetics, while the other two processes are the agglomerate (520 nm) fast and slow reactions. Methanol scavenging confirmed •OH involvement in the monomer and slow agglomerate reactions, while the fast aggregate reaction proceeded via another mechanism. Comparative experiments with carbamazepine (CBZ) showed first-order degradation kinetics with linear dependence on H₂O₂ concentration, contrasting with the L-H kinetics observed for CQDs. These findings give additional insight on the structure of CQDs derived from citric acid and demonstrate that such CQDs cannot serve as dual actinometers for both UV and UV-based AOP monitoring.

研究了柠檬酸铵合成的碳量子点（CQDs）作为荧光探针，用于评价高级氧化过程（AOPs）中紫外线（UV）通量和羟基自由基（•OH）。荧光光谱表征的CQDs在440 nm和520 nm处显示出两个不同的发射波段，分别对应于单体和团块形式的柠檬酸（CZA）。在低压汞灯照射下，CQDs的荧光损失在过氧化氢的存在下显著增强。剂量-反应分析确定了三个不同的过程：单体反应（440nm）遵循Langmuir-Hinshelwood （L-H）动力学，另外两个过程是团块反应（520 nm）的快速和慢速反应。甲醇清除证实了•OH参与单体和慢团聚反应，而快团聚反应通过另一种机制进行。与CQDs的L-H动力学相比，卡马西平（CBZ）的一级降解动力学与H2O2浓度呈线性关系。这些发现对柠檬酸衍生的CQDs的结构提供了额外的见解，并证明这种CQDs不能作为紫外和基于紫外的AOP监测的双重辐射计。

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引用次数: 0

Adsorptive and Photo-Fenton catalytic activities of Iron-Tungstate/Reduced graphene oxide nanocomposite for hospital wastewater treatment 钨酸铁/还原氧化石墨烯纳米复合材料在医院废水处理中的吸附及光fenton催化活性

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-02 DOI: 10.1016/j.enmm.2025.101117

O.J. Ajala , J.O. Tijani , A.S. Abdulkareem , R.B. Salau , O.S. Aremu , D. Onwudiwe , T.C. Egbosiuba , M.N. Alharthi , Y. Balogun

This study presents the synthesis, characterization, and application of a novel FeWO₄/reduced graphene oxide (rGO) nanocomposite as adsorptive and photo-fenton agent for the removal of heavy metals and treatment of hospital wastewater. The nanocomposite was successfully prepared using a one-pot synthesis method and characterized by various techniques including X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analyser, high resolution scanning electron microscopy (HRSEM), Energy Dispersive Spectroscopy (EDS) and UV–Vis spectroscopy. FeWO₄/rGO nanocomposite demonstrated excellent adsorption capacity for lead (Pb), cadmium (Cd), copper (Cu), nickel (Ni), and chromium (Cr), with maximum removal efficiencies of 86.68 %, 80.13 %, 70.52 %, 68.10 %, and 61.87 %, respectively. The adsorption process followed pseudo-second-order kinetics, with the optimal conditions being 0.1 g of adsorbent, 120 min of contact time, and 200 rpm stirring speed. In addition, FeWO₄/rGO nanocomposite exhibited notable photo-Fenton catalytic activity under solar radiation, achieving a significant reduction in biological oxygen demand (63.54 %), total organic carbon (39.14 %), and chemical oxygen demand (33.33 %) in hospital wastewater. The optimization of the photo-Fenton process, conducted via the Box-Behnken Design, showed that the optimal conditions for organic pollutants degradation were 0.35 g of catalyst, pH 7, and 147.27 min of reaction time. These findings highlight the potential of FeWO₄/rGO nanocomposites for effective wastewater treatment, offering a sustainable solution for the removal of hazardous pollutants from hospital effluents.

本研究介绍了一种新型FeWO4/还原氧化石墨烯（rGO）纳米复合材料的合成、表征和应用，该材料作为吸附和光fenton剂，用于去除重金属和处理医院废水。采用一锅法成功制备了纳米复合材料，并通过x射线衍射（XRD）、布鲁诺尔-埃米特-泰勒（BET）表面积分析仪、高分辨率扫描电子显微镜（HRSEM）、能谱分析（EDS）和紫外可见光谱等多种技术对其进行了表征。FeWO4/rGO纳米复合材料对铅（Pb）、镉（Cd）、铜（Cu）、镍（Ni）和铬（Cr）具有良好的吸附能力，最大去除率分别为86.68%、80.13%、70.52%、68.10%和61.87%。吸附过程符合准二级动力学，最佳条件为吸附剂用量0.1 g、接触时间120 min、搅拌速度200 rpm。此外，FeWO4/rGO纳米复合材料在太阳辐射下表现出显著的光- fenton催化活性，可显著降低医院废水中的生物需氧量（63.54%）、总有机碳（39.14%）和化学需氧量（33.33%）。通过Box-Behnken设计对光- fenton工艺进行优化，结果表明，催化剂用量为0.35 g， pH为7，反应时间为147.27 min，对有机污染物的降解效果最优。这些发现突出了FeWO4/rGO纳米复合材料在有效处理废水方面的潜力，为去除医院废水中的有害污染物提供了一种可持续的解决方案。

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引用次数: 0

Bio-inspired formulation of starch-coated silver nanoparticles: A sustainable computing towards environmental monitoring and biomedical sectors 淀粉包覆银纳米颗粒的生物启发配方：面向环境监测和生物医学部门的可持续计算

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-12-31 DOI: 10.1016/j.enmm.2025.101118

Koyel Biswas , Zisan Ahamed , Tiasha Dutta , Bhaskar Mallick , Pooja Biswas , Jayanta Kumar Biswas , Sushil Kumar Mandal

A simple, eco-friendly method was employed to synthesize biopolymer-coated silver nanoparticles (AgNPs) using an aqueous starch (St) solution and tea waste extract (WT), without toxic chemicals. DLS, FTIR, SEM-EDX, TEM, XRD, and UV–visible spectroscopy were used to analyze the St/WT-AgNPs. AgNPs production was verified by UV–Vis analysis, which showed a surface plasmon resonance peak at 430 nm. A zeta potential of –28.15 mV and an average particle size of 77.95 nm were found using DLS measurements. Functional groups responsible for stabilizing nanoparticles were discovered by FTIR analysis; stability was maintained for up to nine months. Porous morphology, elemental composition, spherical shape, and crystalline (FCC) structure were all shown by SEM, EDX, TEM, and XRD. The catalytic performance of St/WT-AgNPs in the degradation of Rhodamine B (RhB) and 4-Nitrophenol (4-NP) followed pseudo-first-order kinetics. At concentrations of 50, 100, 150, and 200 ppm, the corresponding rate constants (k) for RhB degradation were 0.406, 0.1382, 0.0578, and 0.0339 min⁻¹. K values for 4-NP were 0.033, 0.056, 0.1037, and 0.344 min⁻¹. Additionally, the effect of St/WT-AgNPs’ recyclability and reductant on degrading efficiency was evaluated. With MIC values of 100 μg/ml for Bacillus subtilis and 80 μg/ml for Proteus vulgaris, antimicrobial testing demonstrated high action against both Gram-positive and Gram-negative bacteria. The IC₅₀ for cytotoxicity against HeLa cells was 80 μg/ml. A comparative study with non-coated WT-AgNPs highlighted the enhanced catalytic, antibacterial, and cytotoxic performance of St/WT-AgNPs.

采用一种简单、环保的方法，以水淀粉（St）溶液和茶渣提取物（WT）为原料合成生物聚合物包被银纳米粒子（AgNPs），且不含有毒化学物质。采用DLS、FTIR、SEM-EDX、TEM、XRD和uv -可见光谱对St/WT-AgNPs进行了分析。通过紫外可见光谱分析证实了AgNPs的产生，在430 nm处发现了表面等离子体共振峰。DLS测定得到的zeta电位为-28.15 mV，平均粒径为77.95 nm。FTIR分析发现了稳定纳米颗粒的官能团；稳定状态维持了长达9个月。通过SEM、EDX、TEM、XRD等表征材料的孔隙形态、元素组成、球形结构和结晶结构。St/WT-AgNPs降解罗丹明B （RhB）和4-硝基苯酚（4-NP）的催化性能符合准一级动力学。在50、100、150和200 ppm的浓度下，RhB降解的相应速率常数(k)分别为0.406、0.1382、0.0578和0.0339 min−1。4-NP的K值分别为0.033、0.056、0.1037和0.344 min−1。考察了St/WT-AgNPs的可回收性和还原剂对降解效率的影响。对枯草芽孢杆菌的MIC值为100 μg/ml，对普通变形杆菌的MIC值为80 μg/ml，对革兰氏阳性菌和革兰氏阴性菌均有较高的抑菌活性。对HeLa细胞的细胞毒性IC50为80 μg/ml。一项与未涂覆的WT-AgNPs的比较研究表明，St/WT-AgNPs具有更强的催化、抗菌和细胞毒性能。

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引用次数: 0

Environmental contaminants and ecotoxicological consequences of antibiotics and personal care products in freshwater ecosystems: Monitoring and management strategies – A review and meta-analysis 淡水生态系统中抗生素和个人护理产品的环境污染物和生态毒理学后果：监测和管理策略-综述和荟萃分析

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-12-31 DOI: 10.1016/j.enmm.2025.101119

Md. Didaruzzaman Sohel , Md Saydur Rahman

Pharmaceuticals and personal care products (PPCPs) constitute a class of newly discovered micropollutants that harm living aquatic organisms. Pharmaceutical drugs, such as antibiotics, are commonly found in freshwater ecosystems and wastewater treatment effluents. Notably, antibiotics can enter freshwater habitats, posing a growing ecological threat. Additionally, PPCPs are hazardous to aquatic organisms both acutely and chronically. This study focused on peer-reviewed articles on PPCPs from 2000 to 2025 on scholarly databases. The initial literature search yielded 1,760 articles. After removing duplicates and systematically assessing study relevance, the dataset was narrowed to 1,172 articles. VOSviewer software was used to generate visual maps of keyword relatedness. We evaluated the quantitative concentrations (ng/L to µg/L) of antibiotics and PCP and reviewed their effects on growth, development, and reproductive functions in aquatic organisms. Importantly, research has uncovered a link between antibiotics and PCP pollution, which affects aquatic life. The elimination of antibiotics and PCPs has been achieved through various degrading techniques, including chemical and biological processes. However, antibiotics and PCPs cannot be entirely eliminated through biological and chemical treatments. Therefore, more effective, environmentally friendly methods must be developed for treating antibiotics and PCPs in aqueous media. This article thoroughly reviews the presence, fate, and possible hazards of antibiotics and PCPs in freshwater organisms. Additionally, this review article addresses the current knowledge gap regarding the levels and trends of antibiotics and PCPs in freshwater environments. Finally, it provides suggestions and innovative strategies that can help manage and evaluate ecological risks and contamination levels for further study.

药品和个人护理产品（PPCPs）构成了一类新发现的危害水生生物的微污染物。药物，如抗生素，通常存在于淡水生态系统和废水处理流出物中。值得注意的是，抗生素可以进入淡水栖息地，造成越来越大的生态威胁。此外，ppcp对水生生物有急性和慢性危害。本研究的重点是2000年至2025年学术数据库中关于ppcp的同行评议文章。最初的文献检索产生了1760篇文章。在去除重复和系统评估研究相关性后，数据集缩小到1172篇。使用VOSviewer软件生成关键词相关性可视化图。我们评估了抗生素和PCP的定量浓度（ng/L到µg/L），并回顾了它们对水生生物生长、发育和生殖功能的影响。重要的是，研究发现了抗生素和影响水生生物的PCP污染之间的联系。抗生素和pcp的消除是通过各种降解技术实现的，包括化学和生物过程。然而，抗生素和pcp不能通过生物和化学处理完全消除。因此，必须开发更有效、更环保的方法来处理水介质中的抗生素和pcp。本文全面回顾了淡水生物中抗生素和pcp的存在、命运和可能的危害。此外，这篇综述文章解决了目前关于淡水环境中抗生素和pcp的水平和趋势的知识差距。最后，提出了有助于生态风险和污染水平管理和评估的建议和创新策略，供进一步研究。

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引用次数: 0

Nano ZnCuFe2O4 decorated activated carbon derived from date palm biowaste for efficient adsorptive removal of atenolol from water and additional photocatalytic activity 纳米ZnCuFe2O4修饰的枣椰树生物废弃物活性炭对水中阿替洛尔的吸附去除及光催化活性研究

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-12-30 DOI: 10.1016/j.enmm.2025.101116

Anood Ibrahim , Jibran Iqbal , Kenesha Wilson , Pramod Kumbhar , Swati Singh , Kyriaki Polychronopoulou , Yousef Nazzal

Access to clean and safe water remains a global challenge, particularly in arid regions such as the United Arab Emirates (UAE). The present study proposes an innovative approach to treat emerging sources of wastewater, like atenolol (AT) pharmaceuticals, by utilizing activated carbon (AC) produced from biomass waste of date palm leaves, an abundant agricultural waste in the UAE. The prepared AC achieved 84.5 % removal of AT; however, making its composite with nano ZnCuFe₂O₄ promoted the removal of AT to 97 % at 180 min under the conditions of [AT]₀ = 10 mg/L, [AC]₀ = [AC/ZnCuFe₂O₄]₀ = 1.0 g/L, and pH = 7.5. The removal of AT by AC and AC/ZnCuFe₂O₄ best fitted the Freundlich adsorption model and the pseudo-second-order kinetic model. Thermodynamic analysis confirmed the spontaneous and exothermic nature of AT adsorption onto AC/ZnCuFe₂O₄. The removal efficiency of AT was promoted with increasing both adsorbent and adsorbate doses. The removal efficiency of AT was declined under the conditions of both very high and lower pH. The composite material proved to be reusable and stable, and showed greater adsorption efficiency even in the presence of counter ions. The advanced characterization techniques, like FTIR, XRD, SEM-EDX, BET, XPS, and TEM showed successful formation of AC and AC/ZnCuFe₂O₄ composite with porous nature and high surface properties. The adsorptive removal mechanism of AT by the prepared material was found to occur primarily through H-bonding, π-π, and n-π interactions. The prepared material also showed good photocatalytic activity and caused effective degradation of AT into different degradation products (DPs). The ecotoxicities of AT and its DPs were analyzed by ECOSAR program. The effective adsorption and photocatalytic degradation suggest significant potential of the prepared materials in treating pharmaceuticals wastewater.

获得清洁和安全的水仍然是一项全球性挑战，特别是在阿拉伯联合酋长国（阿联酋）等干旱地区。本研究提出了一种创新的方法来处理新兴的废水来源，如阿特洛尔（AT）药物，利用从阿联酋丰富的农业废弃物枣椰叶的生物质废物中产生的活性炭（AC）。制备的AC对AT的去除率达到84.5%；在[AT]0 = 10 mg/L, [AC]0 = [AC/ZnCuFe2O4]0 = 1.0 g/L, pH = 7.5的条件下，与纳米ZnCuFe2O4复合，180 min AT去除率可达97%。AC和AC/ZnCuFe2O4对AT的去除最符合Freundlich吸附模型和拟二级动力学模型。热力学分析证实了AC/ZnCuFe2O4吸附AT的自发和放热性质。随着吸附剂和吸附物用量的增加，AT的去除率均有所提高。在很高和很低的ph条件下，AT的去除效率都有所下降。复合材料具有可重复使用性和稳定性，即使在反离子存在的情况下也表现出较高的吸附效率。FTIR、XRD、SEM-EDX、BET、XPS、TEM等先进表征技术表明，AC和AC/ZnCuFe2O4复合材料具有多孔性和高表面性能。制备的材料对AT的吸附去除机制主要通过h键、π-π和n-π相互作用进行。所制备的材料还具有良好的光催化活性，并能有效地将AT降解成不同的降解产物（DPs）。采用ECOSAR程序分析了AT及其DPs的生态毒性。制备的材料具有良好的吸附和光催化降解性能，在处理制药废水方面具有广阔的应用前景。

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引用次数: 0

Nanotechnology for sustainable remediation of petrochemical effluents: trends, challenges, and opportunities 纳米技术用于石化废水的可持续修复：趋势、挑战和机遇

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-12-24 DOI: 10.1016/j.enmm.2025.101113

Isaac Alhamdu Baba , Paul Habila Samson , Saad Shafiu , Saheed Mustapha , Ambali Saka Abdulkareem , Jimoh Oladejo Tijani

The enormous expansion of the petrochemical industry has resulted in an immediate rise in complex and recalcitrant pollutants released into water bodies, posing severe environmental and health hazard to the public. The traditional treatments are largely ineffective in removing the varied array of the common pollutants found in petrochemical wastewaters, such as heavy metals, polycyclic aromatic hydrocarbons (PAHs), phenols, and volatile organic compounds (VOCs). Over the past decades, nanotechnology has been a developing area of sustainable treatment of petrochemical wastewater with a high surface area, adjustable physicochemical characteristics, and improved reactivity. The present review provides an integrated overview of recent advancements in application of nanomaterials such as metal oxides, carbon-based nanostructures, and hybrid nanocomposites for efficient treatment of petrochemical effluents. Adsorption, photocatalytic, and redox removal mechanisms are scrutinized at the molecular level. Also, the current paper establishes the master challenges, such as nanoparticle agglomeration, secondary pollution, scalability, and regulation. Trends of innovative green synthesis routes, intelligent nanomaterials, and coupled treatment systems are also presented as avenues to greener and effective remediation. This review will provide a general vision to engineers, researchers, and policymakers for the safe application of nanotechnology in environmental settings.

石化工业的大规模扩张，导致水体中复杂难降解污染物的迅速增加，对公众的环境和健康造成严重危害。传统的处理方法在去除石化废水中发现的各种常见污染物方面基本上是无效的，例如重金属、多环芳烃（PAHs）、酚类和挥发性有机化合物（VOCs）。在过去的几十年里，纳米技术以其高表面积、可调节的物理化学特性和提高的反应性成为石油化工废水可持续处理的一个发展方向。本文综述了金属氧化物、碳基纳米结构和杂化纳米复合材料等纳米材料在石油化工废水处理中的应用进展。吸附，光催化和氧化还原去除机制在分子水平上进行审查。此外，本文还提出了纳米颗粒团聚、二次污染、可扩展性和监管等主要挑战。创新的绿色合成路线，智能纳米材料和耦合处理系统的趋势也提出了更绿色和有效的补救途径。这篇综述将为工程师、研究人员和决策者提供纳米技术在环境环境中的安全应用的总体前景。

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引用次数: 0

Biogenic ZnO nanoparticles from Ixora coccinea: Effect of calcination on selected heavy metal removal from brackish water 生氧化锌纳米颗粒：煅烧对苦咸水中重金属去除的影响

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-12-16 DOI: 10.1016/j.enmm.2025.101114

Isaac Alhamdu Baba , Ambali Saka Abdulkareem , Tijani Jimoh Oladejo

Water pollution by heavy metals remains a priority environmental problem; as such, there is a demand for low-cost and ecologically benign approaches toward their treatment. Herein, ZnO nanoparticles were synthesized using Ixora coccinea flower extract, a nontoxic and green pathway toward nanoparticle preparation. The prepared ZnO samples were calcined in a temperature window of 350–550 °C to modulate their physicochemical properties, with subsequent use in the batch mode removal of Pb(II), Cu(II), Fe(III), Cd(II), and Cr(VI) from brackish wastewater. Amongst the calcination temperatures employed, the sample calcined at 500 °C exhibited the highest adsorption efficiency because it removed >90 % of Pb(II), Cu(II), Fe(III), and Cd(II) and 71 % of Cr(VI); this was due to a balance of crystallinity, surface functionality, and accessible active sites at this temperature. Adsorption followed pseudo-second-order kinetics, while the Langmuir isotherm described the equilibrium data, pointing toward monolayer chemisorption. Thermodynamic analysis (negative ΔG and positive ΔH) confirmed the spontaneity and endothermic nature of the adsorption process. More than 80 % removal efficiency was retained by the adsorbent even after five regeneration cycles, pointing toward its good stability and reusability. This work highlights the applicability of Ixora coccinea-derived ZnO nanoparticles as a sustainable and efficient adsorbent toward multi-metal wastewater remediation.

重金属污染水污染仍然是一个优先的环境问题；因此，对低成本和生态友好的治疗方法有需求。本文采用无毒、绿色的纳米颗粒制备途径——鸢尾花提取物合成ZnO纳米颗粒。制备的ZnO样品在350 ~ 550℃的温度窗下煅烧，以调节其物理化学性质，随后用于间歇模式去除微盐废水中的Pb(II), Cu(II), Fe(III), Cd（II）和Cr（VI）。在不同的焙烧温度下，500℃焙烧样品的吸附效率最高，可去除90%的Pb（II）、Cu（II）、Fe（III）、Cd（II）和71%的Cr(VI)；这是由于结晶度、表面功能和在该温度下可获得的活性位点的平衡。吸附遵循准二级动力学，而Langmuir等温线描述了平衡数据，指向单层化学吸附。热力学分析（负ΔG和正ΔH）证实了吸附过程的自发性和吸热性质。经过5次再生，吸附剂的去除率仍保持在80%以上，表明吸附剂具有良好的稳定性和可重复使用性。这项工作强调了Ixora coccinea衍生的ZnO纳米颗粒作为多金属废水修复的可持续和高效吸附剂的适用性。

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引用次数: 0

High-sensitive electrochemical assay for endocrine disruptor bisphenol A detection based on graphene/TiO2-S nanohybrid modified sensor 基于石墨烯/TiO2-S纳米杂化修饰传感器的内分泌干扰物双酚A高灵敏度电化学检测

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2025-12-08 DOI: 10.1016/j.enmm.2025.101107

Irwan Irwan , Anwar Anwar , Wenkey Mangera P , Muhammad Nurdin , Maulidiyah Maulidiyah , Muhammad Zakir Muzakkar

Bisphenol A (BPA) is one of the most widely discussed endocrine-disrupting compounds due to its significant impact on both human health and the environment. Therefore, the development of accurate, rapid, and portable monitoring methods for BPA is urgently needed. In this study, we report the electrochemical detection of BPA using a novel graphene/TiO₂-S (GTS) nanocomposite, synthesized through a simple sonication process. The prepared nanocomposite was characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy-Dispersive X-ray Spectroscopy (EDX). The average particle size was found to range between 100–500 nm. Furthermore, the electrochemical performance of the GTS-modified electrode was investigated using cyclic voltammetry techniques. Under optimal conditions, the proposed sensor exhibited two linear response ranges: 0.1–0.9 µgL^-1 (R² = 0.996) and 1–10 µgL^-1 (R² = 0.998), with a low limit of detection (LOD) of 0.0048 µgL^-1. Additionally, the sensor demonstrated good stability and selectivity, indicating its promising potential for BPA detection in real sample analysis.

双酚A （BPA）是被广泛讨论的内分泌干扰化合物之一，因为它对人体健康和环境都有重大影响。因此，迫切需要开发准确、快速、便携的双酚a监测方法。在这项研究中，我们报告了使用一种新的石墨烯/TiO2-S （GTS）纳米复合材料进行双酚a的电化学检测，该复合材料通过简单的超声过程合成。采用傅里叶变换红外光谱（FTIR）、x射线衍射（XRD）、扫描电镜（SEM）和能量色散x射线能谱（EDX）对所制备的纳米复合材料进行了表征。平均粒径在100-500纳米之间。此外，利用循环伏安法研究了gts修饰电极的电化学性能。在最佳条件下，该传感器具有0.1 ~ 0.9µgL-1 （R2 = 0.996）和1 ~ 10µgL-1 （R2 = 0.998）两个线性响应范围，低检出限（LOD）为0.0048µgL-1。此外，该传感器表现出良好的稳定性和选择性，表明其在实际样品分析中检测BPA的潜力很大。

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引用次数: 0