Environmental Nanotechnology, Monitoring and Management最新文献

Silane-grafted g-C3N4 nanosheet enhanced air monitoring filters for PM2.5 capture and detection in urban environments 硅烷接枝g-C3N4纳米片增强空气监测过滤器对城市环境中PM2.5的捕获和检测

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-29 DOI: 10.1016/j.enmm.2026.101129

Vignesh Jagajeevan, Vidhya Lakshmi Sivakumar

Particulate matter (PM₂.₅) pollution poses significant health risks in urban environments, particularly due to the presence of bioaccumulative heavy metals. This study evaluates the enhancement of quartz filter media functionalized with silane-grafted graphitic carbon nitride (g-C₃N₄) for the capture of metal-rich aerosols. Quartz filters were modified with pristine g-C₃N₄ nanosheets and subsequently with a silane-functionalized g-C₃N₄ coating. Material synthesis was confirmed via SEM, XRD, and FTIR analyses. Filters were deployed in an urban environment for 15 days alongside unmodified controls. Post-exposure analysis indicated that while pristine g-C₃N₄ coatings increased overall particulate mass through increased surface area (physisorption), the silane-functionalized filters exhibited a distinct chemisorption affinity for trace metals. Quantitative bulk analysis using inductively coupled plasma–optical emission spectroscopy (ICP–OES) revealed that the silane–g-C₃N₄ modification increased copper (Cu) and lead (Pb) capture by more than 220% compared to pristine g-C₃N₄. Furthermore, laser-induced breakdown spectroscopy (LIBS) surface mapping showed a strong correlation (R² > 0.9) with bulk ICP–OES data, validating LIBS as a rapid, reagent-free screening tool for filter saturation. These results demonstrate that amine-functionalized nanocoatings can transform passive air filters into active media for the selective sequestration of high-toxicity heavy metals.

颗粒物（PM2.5）污染在城市环境中构成重大健康风险，特别是由于存在生物蓄积性重金属。本研究评估了硅烷接枝石墨氮化碳（g-C3N4）功能化石英滤料对富金属气溶胶捕获的增强作用。用原始的g-C3N4纳米片修饰石英滤光片，然后用硅烷功能化的g-C3N4涂层修饰石英滤光片。通过SEM， XRD和FTIR分析证实了材料的合成。过滤器在城市环境中放置了15天，与未修改的对照一起。暴露后分析表明，虽然原始g-C3N4涂层通过增加表面积（物理吸附）增加了总体颗粒质量，但硅烷功能化过滤器对微量金属表现出明显的化学吸附亲和力。利用电感耦合等离子体发射光谱（ICP-OES）进行定量体分析表明，硅烷- g-C3N4改性后，与原始g-C3N4相比，铜（Cu）和铅（Pb）的捕获量增加了220%以上。此外，激光诱导击穿光谱（LIBS）表面制图与大量ICP-OES数据显示出很强的相关性（R2 > 0.9），验证了LIBS是一种快速、无试剂筛选过滤器饱和度的工具。这些结果表明，胺功能化纳米涂层可以将被动空气过滤器转变为选择性隔离高毒性重金属的活性介质。

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引用次数: 0

Green synthesis and antibacterial properties of Thalassiosira-microalgae decorated with silver and lignin Nanoparticles: A promising strategy for bacterial control in aquaculture 纳米银和木质素修饰海硅藻微藻的绿色合成和抗菌性能：一种很有前景的水产养殖细菌控制策略

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-24 DOI: 10.1016/j.enmm.2026.101127

Jose Luis Parrales , Sarah Briceño , Johnny Chimborazo , Lola De Lima , Francisco J. Alvarez , Gema Gonzalez

The overuse of antibiotics promotes the development of antibiotic-resistant bacteria that persist in the environment and affect both human and animal health. This work proposes a sustainable alternative using Thalassiosira microalgae decorated with silver and lignin nanoparticles to control bacte- rial growth. Lignin (LNPs) and Silver nanoparticles (AgNPs), synthesized using Moringa oleifera and Croton lechleri (Dragon’s Blood), were then in- corporated into the microalgae as a carrier. The samples were characterized using Ultraviolet–Visible spectroscopy (UV–Vis), Fourier Transform Infrared (FTIR) spectroscopy, Transmission electron microscopy (TEM), Atomic Force microscopy (AFM), Fluorescence microscopy, and Raman spectroscopy. Atomic Force microscopy confirmed the formation of AgNPs within a range of 17 nm using C. lechleri, 95 nm with M. oleifera, and 28.6 nm for Lignin nanoparticles. Antimicrobial tests conducted on Pseudomonas aeruginosa and Vibrio parahaemolyticus demonstrated that the nanoparticle-decorated microalgae displayed promising antimicrobial and fluorescence properties. The combination of AgNPs − M. oleifera with Lignin nanoparticles demonstrates notable antibacterial efficacy with an inhibition of 14.53 mm at 15 ppm, suggesting a potential additive effect. The results reveal that microalgae decorated with nanoparticles have potential as an innovative dietary supplement for aquaculture.

抗生素的过度使用促进了抗生素耐药细菌的发展，这些细菌在环境中持续存在，影响人类和动物的健康。这项工作提出了一种可持续的替代方案，利用银和木质素纳米颗粒修饰的海硅藻微藻来控制细菌的生长。将辣木和龙血合成的木质素（LNPs）和银纳米粒子（AgNPs）作为载体掺入微藻中。采用紫外可见光谱（UV-Vis）、傅里叶变换红外光谱（FTIR）、透射电子显微镜（TEM）、原子力显微镜（AFM）、荧光显微镜和拉曼光谱对样品进行了表征。原子力显微镜证实，C. lechleri在17 nm范围内形成AgNPs， M. oleifera在95 nm范围内形成AgNPs，木质素纳米颗粒在28.6 nm范围内形成AgNPs。对铜绿假单胞菌和副溶血性弧菌进行的抗菌试验表明，纳米颗粒修饰的微藻具有良好的抗菌和荧光特性。AgNPs−M. oleifera与木质素纳米颗粒的联合抗菌效果显著，在15 ppm下抑制14.53 mm，表明可能存在加性效应。结果表明，纳米颗粒修饰微藻具有作为水产养殖创新饲料添加剂的潜力。

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引用次数: 0

Synthesis and evaluation of chitosan functionalized urea nanofertilizer for efficient foliar application: insights into structure and function 壳聚糖功能化叶面尿素纳米肥料的合成与评价：结构与功能研究

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-21 DOI: 10.1016/j.enmm.2026.101126

Damyanti Prajapati , Ajay Pal , Shiwani Mandhania , Khaidem Aruna Devi , Shanti Kumar Sharma , Harish , Vinod Saharan

In this study, a novel chitosan-functionalized urea nanofertilizer (CS-f-Urea NF) was synthesized via a two-step ionic gelation method, incorporating Zn and Ni to enhance foliar nitrogen (N) assimilation. The key structural and functional properties of CS-f-Urea NF were analysed by NTA, DLS, FTIR, HR-TEM, EDS, XPS, BET, and BJH. In foliar CS-f-Urea NF treatment, a notable increase in plant leaf urease activity was observed in wheat flag leaf, which is essential for enhanced N assimilation compared to foliar urea. Consequently, higher N content and increased chlorophyll levels were recorded, which significantly support plant growth. The results suggest that Zn contributes to structural stabilization of the chitosan complex, while Ni enhances urease-mediated N assimilation. The present work demonstrates that foliar CS-f-Urea NF enhanced N availability to wheat leaves while using 1.8–3.7 times less urea than 2% urea foliar application.

本研究通过两步离子凝胶法制备了一种新型壳聚糖功能化尿素纳米肥料（CS-f-Urea NF），该肥料加入Zn和Ni以促进叶片氮(N)的同化。采用NTA、DLS、FTIR、HR-TEM、EDS、XPS、BET和BJH分析了CS-f-Urea NF的主要结构和功能特性。在叶片cs -f-尿素NF处理下，小麦旗叶脲酶活性显著增加，这是促进氮素同化的必要条件。结果表明，氮素含量和叶绿素含量均显著增加，有利于植物生长。结果表明，Zn有助于壳聚糖复合物的结构稳定，而Ni则增强了脲酶介导的N同化。本研究表明，与2%尿素叶面施用相比，CS-f-Urea NF在减少1.8-3.7倍尿素的情况下提高了小麦叶片氮素有效性。

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引用次数: 0

A user-friendly AgNP colorimetric sensor for mercury(II) monitoring in water systems 一种用户友好的AgNP比色传感器，用于水系统中的汞（II）监测

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-18 DOI: 10.1016/j.enmm.2026.101125

Dhony Hermanto , Yulida Tsaniyatinnuri , Saprini Hamdiani , Lely Kurniawati , Siswoyo Siswoyo , Bambang Kuswandi , Rochmad Krissanjaya , Julinton Sianturi , Nurul Ismillayli

Mercury (Hg) remains a persistent and highly toxic pollutant that readily infiltrates aquatic environments, bioaccumulates in organisms, and biomagnifies along food chains, ultimately posing significant ecological and human health risks, particularly through seafood consumption. The rapid and selective detection of Hg(II) in water is therefore essential for effective environmental monitoring and safeguarding public health. In this study, a user-friendly colorimetric sensor based on silver nanoparticles (AgNPs) was developed using a green electrosynthesis approach assisted by Stachytarpheta jamaicensis leaf extract (SJLE). The resulting AgNPs serve as a facile visual and spectroscopic probe for Hg(II) detection, operating through an Ag–Hg amalgamation mechanism that induces localized surface plasmon resonance (LSPR) quenching and produces a distinct color transition from brownish-yellow to pale yellow. Under optimized conditions, the sensor exhibited a strong linear response to Hg(II) concentrations ranging from 1–50 µg L⁻¹, with a limit of detection of 1.47 µg L⁻¹ and a limit of quantification of 2.52 µg L⁻¹. The method demonstrated high precision (RSD ≤ 2.3 %) and strong agreement with UV–Vis measurements. Validation using cold vapour–atomic absorption spectrophotometry (CV-AAS) on well water samples produced satisfactory recoveries and showed excellent correlation (R² > 0.99) with minimal bias (<0.01 µg L⁻¹). Beyond its analytical reliability, the proposed platform offers a rapid, reagent-free, and field-deployable solution for mercury monitoring. Overall, this environmentally friendly sensing approach provides a cost-effective alternative to conventional laboratory techniques and holds promising potential for broader applications in heavy metal detection, supporting sustainable water management and contributing to SDGs 6 and 14.

汞仍然是一种持久性高毒性污染物，很容易渗透到水生环境中，在生物体中进行生物积累，并沿着食物链进行生物放大，最终对生态和人类健康构成重大风险，特别是通过食用海产品。因此，快速和选择性地检测水中汞（II）对于有效的环境监测和保障公众健康至关重要。在本研究中，采用绿色电合成方法，以牙买加水芋叶提取物（SJLE）为辅助材料，开发了一种基于银纳米粒子（AgNPs）的用户友好型比色传感器。结果AgNPs作为简单视觉和光谱探针Hg (II)检测,操作通过Ag-Hg融合机制,引起局部表面等离子体共振(LSPR)淬火并产生一个不同的颜色从棕黄色过渡到淡黄色。在优化条件下，该传感器对Hg（II）浓度在1 ~ 50µg L−1范围内表现出较强的线性响应，检测限为1.47µg L−1，定量限为2.52µg L−1。该方法精密度高（RSD≤2.3%），与UV-Vis测量结果吻合度高。使用冷蒸汽原子吸收分光光度法（CV-AAS）对井水样品进行验证，回收率令人满意，并且具有极好的相关性（R2 > 0.99），偏差最小（<0.01µg L−1）。除了分析可靠性之外，该平台还提供了一种快速、无试剂、可现场部署的汞监测解决方案。总体而言，这种环境友好型传感方法为传统实验室技术提供了一种具有成本效益的替代方案，在重金属检测、支持可持续水资源管理和促进可持续发展目标6和14方面具有广阔的应用前景。

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引用次数: 0

Nanobiochar from pomegranate peel biomass for enhanced 4-nitrophenol removal: synthesis, characterization, and performance evaluation 石榴皮生物质纳米炭增强4-硝基苯酚去除：合成、表征和性能评价

Q1 Environmental Science

Environmental Nanotechnology, Monitoring and Management

Pub Date : 2026-01-16 DOI: 10.1016/j.enmm.2026.101123

Kustomo , Sam Fong Yau Li

Nanobiochar (NBC) derived from pomegranate peel biomass was engineered as a low-cost, mildly synthesized, and sustainable adsorbent for the efficient removal of 4-nitrophenol (4-NP) from water. NBC was prepared via controlled pyrolysis at 600°C for 2 h (10°C min⁻¹ heating rate, 0.67 L min⁻¹ N₂ flow), followed by facile ball milling and ultrasonication to create a high surface area, abundant oxygen-containing functional groups, and nanoscale defect sites tailored for enhanced adsorption performance. Comprehensive characterization using FTIR, XRD, SEM-EDS, TEM, Raman spectroscopy, BET surface area analysis, TGA, zeta potential, and CHN elemental analysis was employed to correlate NBC’s structural and surface properties with its adsorption behavior. Under optimized conditions (pH 6, 15 mg NBC dose, 30 mL 4-NP solution at 298 K), NBC exhibited rapid 4-NP uptake with a maximum adsorption capacity of 84.75 mg g⁻¹ and a removal efficiency exceeding 94.12%. The Langmuir isotherm and pseudo-second-order kinetic models best described the data result, indicating predominant monolayer chemisorption and strong interactions between NBC and 4-NP. Regeneration studies showed that NaOH outperformed HNO₃, achieving 85.76% and 20.53% 4-NP removal, respectively, after three consecutive cycles. Overall, NBC demonstrates promising as a practical and environmentally benign adsorbent for advanced treatment of 4-NP-contaminated waters and related phenolic pollutants.

从石榴皮生物质中提取的纳米炭（NBC）是一种低成本、合成温和、可持续的吸附剂，可有效去除水中的4-硝基苯酚（4-NP）。通过在600°C条件下（10°C min - 1升温速率，0.67 L min - 1 N2流量）热解2 h制备NBC，然后进行简单的球磨和超声波处理，以获得高表面积，丰富的含氧官能团和纳米级缺陷位点，以增强吸附性能。采用FTIR、XRD、SEM-EDS、TEM、拉曼光谱、BET表面积分析、TGA、zeta电位和CHN元素分析等综合表征方法，将NBC的结构和表面性质与吸附行为联系起来。在优化条件下（pH为6，NBC剂量为15 mg， 4-NP溶液为30 mL， 298 K）， NBC对4-NP具有快速吸附能力，最大吸附量为84.75 mg g−1，去除率超过94.12%。Langmuir等温线和拟二阶动力学模型最能描述数据结果，表明主要的单层化学吸附和NBC与4-NP之间的强相互作用。再生研究表明，连续三次循环后，NaOH的4-NP去除率分别达到85.76%和20.53%，优于HNO3。总的来说，NBC作为一种实用且环保的吸附剂，有望用于深度处理4- np污染的水和相关的酚类污染物。

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引用次数: 0

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