COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Liping Liang,Yishun Wu,Weishou Tan,Fenfen Xi,Yun Zhang,Jinhui Zhao,Xu Meng,Jianfeng Ma
This study successfully synthesized g-C 3 N 4 -S-nZVI and rGO-S-nZVI composites for U(VI) sequestration and for the assessment of microbial toxicity to bacteria and fungi. The maximum U(VI) adsorption capacities of g-C 3 N 4 -S-nZVI and rGO-S-nZVI were 662.3 mg/g and 578.0 mg/g at pH = 6.0, respectively. The adsorption kinetics followed the pseudo-second-order model, and the isotherm data were well-described by the Langmuir model. The composites had a good application prospect due to their excellent resistance to ionic interference and favorable recyclability. Analysis via X-ray absorption near-edge structure (XANES), X-ray photoelectron spectroscopy (XPS), and extended X-ray absorption fine structure (EXAFS) confirmed that U(VI) removal occurred primarily through chemisorption, with uranyl ions forming a bidentate mononuclear edge-sharing coordination complex on the iron oxide surface. The presence of reactive oxygen species inhibited the reduction of U(VI) to U(IV). Fungal toxicity assays indicated good biocompatibility of g-C 3 N 4 and rGO, while S-nZVI and its composites exhibited significant inactivation of Arthrographis arxii . The inactivation mechanism involves the synergistic effects of physical contact, dissolved Fe 2+ , and ROS generation. Sediment microbial community analysis revealed that S-nZVI caused the greatest disturbance to bacterial communities, while the composites formation mitigated their influence. It is worth noting that g-C 3 N 4 -S-nZVI exhibited the most significant anti-fungal efficacy, whereas rGO-S-nZVI had a relatively small impact on bacterial and fungal communities. This research not only provides an effective method for removing U(VI), but also clarifies the impact of material use on environmental microorganisms.
研究领域:
环境科学
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材料科学
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微生物学
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纳米技术
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放射化学
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产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 3
·399
·
IF 5.3
Jonathan Suazo-Hernández,Pamela Sepúlveda,Lizethly Cáceres-Jensen,Jorge Castro-Rojas,Patricia Poblete-Grant,Nanthi Bolan,María de la Luz Mora
In the last decade, the application of nanoscale zero-valent iron (nZVI) has garnered great attention as an adsorbent due to its low cost, non-toxicity, high porosity, and BET-specific surface area. In particular, the immobilization of nZVI particles onto inorganic and organic substrates (nanocomposites) decreased its agglomeration, allowing them to be effective and achieve greater adsorption of pollutants than pristine nanoparticles (NPs). Although nZVI began to be used around 2004 to remove pollutants, there are no comprehensive review studies about phosphate removal from aquatic systems to date. For this reason, this study will show different types of nZVI, pristine nZVI, and its nanocomposites, that exist on the market, how factors such as pH solution, oxygen, temperature, doses of adsorbent, initial phosphate concentration, and interferents affect phosphate adsorption capacity, and mechanisms involved in phosphate removal. We determined that nanocomposites did not always have higher phosphate adsorption than pristine nZVI particles. Moreover, phosphate can be removed by nZVI-based nanoadsorbents through electrostatic attraction, ion exchange, chemisorption, reduction, complexation, hydrogen bonding, and precipitation mechanisms. Using the partition coefficient (PC) values, we found that sepiolite-nZVI is the most effective nanoadsorbent that exists to remove phosphate from aqueous systems. We suggest future studies need to quantify the PC values for nZVI-based nanoadsorbents as well as ought to investigate their phosphate removal efficiency under natural environmental conditions.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
Journal of Environmental Sciences
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2022
·
IF 6.796
Chengwei Zhong,Yinying Jiang,Quanfeng Liu,Xiaoshuang Sun,Jiang Yu
Natural siderite (FeCO 3 ), simulated synthetic siderite and nZVI/FeCO 3 composite were used as green and easily available iron-based catalysts in peroxydisulfate activation for remediating 2-chlorophenol as the target contaminant and this technique can effectively degrade organic pollutants in the soil. The key reaction parameters such as catalysts dosage, oxidant concentration and pH, were investigated to evaluate the catalytic performance of different materials in catalytic systems. The buffering property of natural soil conduced satisfactory degradation performance in a wide pH range (3-10). Both the main non-radical of 1 O 2 and free radicals of SO 4 · − and O H · were evidenced by quenching experiment and electron paramagnetic resonance. The reduction of nZVI on FFC surface not only has the advantage for electronic transfer to promote the circulation of Fe(III) to Fe(II), but also can directly dechlorinate. Furthermore, the intermediates were comprehensively analyzed by GC-MS and a potential removal mechanism of three oxidant system for 2-CP soil degradation was obtained. Briefly, this research provides a new perspective for organic contaminate soil treatment using natural siderite or simulated synthetic siderite as efficient and environmental catalytic material.
研究领域:
环境科学
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土壤化学
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产品关联
DOI
PubMed
高影响因子
Scientific Reports
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2019
·Vol. 9
·期 1
·1-8
·
IF 4.011
Yu Pingping,Yu Haifan,Sun Qisong,Ma Bomou
In this study, polyacrylic acid modified filter paper (FP/PAA) was synthesized by in-situ polymerization of acrylic acid, which was used as a matrix to chelate nano-scale zero valent iron (nZVI). The loading content of nZVI in the filter paper reached 24.8%. The fabricated composite FP/PAA/nZVI was characterized by SEM, FT-IR and TGA respectively. Moreover, it was used for the removal of methyl blue and methylene blue as model anionic and cationic dyes. The effect of initial dye concentration on decolorization efficiency was investigated. The results showed that FP/PAA/nZVI enhanced the removal of dye from the simulated dye wastewater and the decolorization efficiency exceeded 95% for the dye solutions lower than 20 mg/L. More importantly, the filter paper supported nZVI realized the continuous treatment of simulated dye wastewater by a simple filtration process. This study hopes to serve as a basis for the application of nZVI in textile wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Jun Zhao,Jilai Gong,Juan Li
The widespread use of neonicotinoid insecticides such as thiamethoxam poses significant ecological risks due to their persistence and mobility, particularly at the soil-water interface (SWI). This study investigated a nanoscale zero-valent iron-loaded biochar composite (nZVI-BC) synergized with indigenous phototrophic biofilms to enhance in situ degradation. While biochar alone immobilized thiamethoxam, it also prolonged its persistence in soil. The nZVI-BC composites significantly reduced pesticide leaching (49.7–62.6%) and accelerated its soil degradation, achieving 85.3–96.6% removal within 40 days, which was 2.1–2.4 times greater than biochar alone, while reducing the pesticide’s half-life to 6.73–14.6 days. Phototrophic biofilms were the primary driver at the SWI, mediating aqueous-phase degradation (half-life of 0.67 days). Integrated analysis revealed that nZVI provided electrons for reductive transformation and enriched functional microbes, while biochar acted as a stable carrier and electron shuttle, facilitating microbial co-metabolism. This work demonstrates a synergistic “adsorption-reduction-biodegradation” strategy, effectively overcoming the limitation of biochar’s contaminant retention and offering a sustainable approach to pesticide remediation at critical environmental interfaces.
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Guangyu Xu,Han Chen,Jingjing Cai,Baowei Hu,Linfa Bao
The contamination of heavy metals and antibiotics represents one of the most serious environmental issues. In this study, the synergistic removal of chromium (Cr(VI)) and tetracycline (TC) by nZVI/MoS 2 composites was investigated to evaluate the removal performance of nZVI-based composites. The characterizations showed that the addition of MoS 2 increased the dispersion of nZVI, provided multiple electron-rich active sites and facilitated the electron transfer of photocatalysis. The addition of TC significantly enhanced the Cr(VI) removal rate, increasing it from 60 % to 80 % within 10 min. The catalytic reaction rate of nZVI/MoS 2 increased from 0.0046 to 0.0163 min −1 . Furthermore, the presence of Cr(VI) also improved the photodegradation efficiency of TC. Based on XPS and EPR analyses, the synergistic removal of Cr(VI) and TC was mainly attributed to enhanced electron transfer promoted by the presence of TC, which accelerated the photocatalytic reduction of Cr(VI) to Cr(III). Surface complexation modeling further confirmed that Cr(VI) removal by nZVI/MoS 2 involved both adsorption and reduction processes. These results are anticipated to inform the design of more efficient nZVI-based composites for practical applications in environmental remediation.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Song Li,Jingchun Tang,Chen Yu,Qinglong Liu,Lan Wang
The easy passivation defect of nano zero-valent iron (nZVI) greatly limits its application in site pollution remediation. Carbon coating can effectively inhibit the passivation of nZVI, but its effectiveness in the soil is still unknown. This study investigated the feasibility of carbon-coated nZVI (Fe 0 @C) as a persulfate (PS) activator to degrade anthracene (ANT) in soil. The results show that the Fe 0 @C/PS system can remove 51.6% of ANT in the soil after 0.5 h of reaction, and reach 76.4% after 12 h of reaction. Not only that, the Fe 0 @C/PS system shows a good removal effect on ANT within the initial pH range of 3–9. Free radical scavenging experiments show that superoxide radicals (O 2 •− ) and singlet oxygen ( 1 O 2 ) are mainly responsible for the removal of ANT, while O 2 •− may be mainly used as a precursor for the generation of 1 O 2 . The activation of PS by Fe 0 @C can generate a large number of free radicals, and soil components (such as β -MnO 2 ) can promote the conversion of O 2 •− to 1 O 2 . Furthermore, the possible degradation pathway of ANT was also proposed. The findings are of great significance to fill up the knowledge gaps in the application of nZVI in soil remediation .
研究领域:
环境科学
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化学工程
·
土壤学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Xiaoyan Liu,Shenyu Zhang,Xinying Zhang,Hao Guo,Xinde Cao,Ziyang Lou,Wei Zhang,Chuanhua Wang
A novel hydrogel-supported nanoscale zero-valent iron (nZVI) composite (nZVI@LH) was synthesized by ion exchange and in-situ reduction. The removal efficiency was tested, and the mechanism was also explored. The nZVI@LH at the precursor Fe(II) ion concentration of 0.1 mol/L presented an enhanced Cr(VI) removal capacity of 310.86 mg/g Fe 0 at pH 5.3, which was 11.6 times more than that of the pure nZVI. The removal efficiency of the composite at pH 2.1 was more than double compared with alkaline or neutral conditions. Scanning electron microscopy (SEM) suggested that the nZVI particles were uniformly immobilized in the lignin hydrogel. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) provided evidence supporting the removal mechanism. According to the XPS results, the high removal capacity of the composite was attributed to chemical reduction/precipitation (69.7%), surface sorption (19.7%), and swelling uptake (10.6%). The pseudo-first-order reduction kinetics and pseudo-second-order kinetic model were employed to simulate the kinetic data, which supported the mechanism that chemical reduction and surface sorption could simultaneously remove Cr(VI). The electron acceptor and electron donor affected the reaction rate, and the presence of humic acid significantly inhibited the reaction. The present study demonstrated that lignin hydrogel acted as a carrier to prevent aggregation of nZVI particles. nZVI particles loaded on lignin hydrogel showed high reactivity and high degree of utilization compared with bare-nZVI. These results exhibited the great potential of nZVI@LH in practical water treatment due to its high activity.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yuwei Wang,Jingfeng Gao,Wanjun Duan,Wenzhi Zhang,Yifan Zhao,Jie Liu
The inactivation of a gram-negative sulfonamide antibiotic resistant bacteria (ARB) HLS.6 and removal of intracellular antibiotic resistance gene (ARG, sul1 ) and class I integrase gene ( intI1 ) by nanoscale zero-valent iron (nZVI) and sulfide-modified nZVI (S-nZVI) with different S/Fe molar ratios were investigated in this study. The S-nZVI with high sulfur content (S/Fe = 0.05, 0.1, 0.2) was superior to nZVI and the treatment effect was best when S/Fe was 0.1. The ARB (2 × 10 7 CFU/mL) could be completely inactivated by 1.12 g/L of S-nZVI (S/Fe = 0.1) within 15 min, and the removal rates of intracellular sul1 and intI1 reached up to 4.39 log and 4.67 log at 60 min, respectively. Quenching experiments and flow cytometry proved that reactive oxygen species and adsorption were involved in the ARB inactivation and target genes removal. Bacterial death and live staining experiments and transmission electron microscopy showed that the ARB cell structure and intracellular DNA were severely damaged after S-nZVI treatment. This study provided a potential alternative method for controlling the antibiotic resistance in aquatic environment.
研究领域:
环境科学
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微生物学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Liang Baiming,Hu Yuguo,Zeng Jiajun,Liang Yu,Xu Wenli,Wang Yu,Yang Pengfei,Li Jingjing,Duan Chongxiong
An NZVI@MOF composite was synthesized via liquid-phase reduction and ambient-temperature precipitation, which not only mitigates NZVI agglomeration but also significantly increases the active sites. Under optimized conditions (pH = 6.0, initial U(VI) concentration of 80 mg L −1 ), the as-synthesized NZVI@MOF composite achieved a maximum adsorption capacity of 349 mg g −1 and a removal efficiency of 96%, outperforming pristine NZVI, MOFs, and conventional adsorbents (e.g., zeolites and activated carbon) via an “adsorption-reduction” synergistic mechanism. Kinetic studies revealed that the adsorption conforms to a pseudo-second-order model, while the Freundlich isotherm model indicated a heterogeneous multilayer chemisorption mechanism. These findings highlight the NZVI@MOF composite as a promising material for radioactive wastewater treatment.
研究领域:
环境科学
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材料化学
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核废料处理
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水净化
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纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2017
·
IF 6.942
Yuancai Lv,Zhuyu Niu,Yuancai Chen,Yongyou Hu
With the introduction of nano zero valent iron (nZVI) technology into our environment, its potential environmental risk to environmental microorganisms has attracted considerable attention. In this study, Pseudomonas putida was chosen as a typical strain to study the bacterial toxicity of nZVI/Pd. The CFU assay results indicated that nZVI/Pd was toxic to P. putida cells but the toxicity decreased with an increase in DO. The experiments isolated by dialysis bag and flow cytometry analysis suggested that both membrane disruption caused by direct contact and oxidative stress were the main bactericidal mechanisms under the aerobic condition , while membrane disruption resulting from direct contact was the primary bactericidal mechanism in the anaerobic system. Furthermore, according to TEM, SEM, EDS , XRD , FTIR and XPS , it was indicated that in the aerobic system, the reactive oxygen species (ROS) generated by nZVI/Pd could oxidize the amide and hydroxyl groups into carboxyl groups , resulting in a decline in peptides and increase in polysaccharides . In addition, the ROS also accumulated inside the cell and caused cell inactivation via oxidative stress . In the anaerobic system, the adhered nZVI/Pd particles would attack the functional groups such as carboxyl, ester and amide, leading to the decline in proteins and polysaccharides and subsequent damage of the membrane. The findings provide a significant guide for the application of nano-bio combined technology.
研究领域:
环境微生物学
·
纳米生物学
✓ 已验证
DOI
高影响因子
WATER ENVIRONMENT RESEARCH
·
2019
·Vol. 91
·期 7
·565-572
·
IF 1.24
Jingge Shang,Jie Gao,Junting Xi,Yingjie Wang,Fangyu Ji,Ruijun Li
A graphene oxide (GO)—nanoscale zerovalent iron (nZVI)—biochar composite (GO-nZVI/BC) was synthesized prior to characterization by X-ray diffraction (XRD), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy analyses. Batch experiments were performed at different initial Cr(VI) concentrations, contact times, and solution pH values. The effects of coexisting anions and chelating agents were also examined. The results indicated that the removal of Cr(VI) was highly pH-dependent and reached a maximum capacity at pH of 2. The equilibrium data were fitted well with the Langmuir isotherm model, and the kinetic data fitted better with the pseudo-second-order kinetic model. The increasing concentrations of EDTA in aqueous solutions were favorable to the removal of Cr(VI), while significantly inhibited adsorption. Furthermore, the GO-nZVI/BC maintained ~84.5% of its original capacity after aging in the air for 25 weeks. Based on the removal efficiency, GO-nZVI/BC can be considered to be an effective material for water treatment applications. Practitioner points Biochar-supported graphene oxide-coated nanoscale zerovalent iron (GO-nZVI/BC) was synthesized and used to treat Cr(VI) from solution. Cr(VI) removal was pH-dependent and obeyed the Langmuir isotherm model and pseudo-second-order model. GO-nZVI/BC maintained ~84.5% of its original capacity after aging for 25 w in the air. Graphical TEM and Magnetic Field of GO-nZVI/BC and its removal capacity of Cr(VI).
研究领域:
环境科学
·
材料科学
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水处理技术
·
污染物修复
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）