Article
Chemistry, Physical
Ge Gao, Lei Zhang, Yixin Shi, Shengjiong Yang, Gen Wang, Huining Xu, Dahu Ding, Rongzhi Chen, Pengkang Jin, Xiaochang C. Wang
Summary: The study found that the microscopic galvanic cell (mGC) exhibited higher Fe(II) release performance compared to ordinary nanoscale-ZVI (nZVI), resulting in improved Cr(VI) removal efficiency. Density functional theory (DFT) revealed that the close proximity of cathode and anode in mGC enhanced the galvanic corrosion of Fe(0). Additionally, hydroxyl radicals generated by a series of side-reactions slightly hindered the reduction of Cr(VI) in the system.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Yi Fang, Xiange Wu, Min Dai, A. Lopez-Valdivieso, Saleem Raza, Imran Ali, Changsheng Peng, Juying Li, Iffat Naz
Summary: The study investigated the advantages, limitations, and future development directions of ZVI-based materials in removing Cr(VI) pollutants, utilizing different preparation methods and material combinations to enhance the efficiency of ZVI. By considering the synergistic effect of pH and DO on Cr(VI) removal, the mechanism of pollutant removal by ZVI-based materials was revealed.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Metallurgy & Metallurgical Engineering
D. P. Ordinartsev, N. Pechishcheva, S. Kh Estemirova, A. Kim, K. Yu Shunyaev
Summary: In this study, a composite sorbent based on montmorillonite was synthesized, which exhibited enhanced adsorption efficiency for Cr(VI) ions. It has potential applications in wastewater treatment and the extraction of chromium compounds.
Article
Engineering, Environmental
Fengfeng Zhou, Qiangling Liu, Yaxin Qin, Wei Liu, Lizhi Zhang
Summary: In this study, L-cysteine was successfully modified on zero-valent iron (ZVI) through a mechanical ball-milling method, leading to improved surface functionality and enhanced removal efficiency of Cr(VI). The modified C-ZVIbm showed a significantly higher Cr(VI) removal efficiency of 99.6% compared to ZVIbm (7.3%) within 30 minutes. The surface characterization revealed the formation of a-COO-Fe complex through specific adsorption of Cys on the oxide shell. The adsorption process followed the Freundlich isotherm and pseudo-second-order kinetic model. Electrochemical and spectroscopic analysis demonstrated that Cys facilitated the Fe(III)/Fe(II) cycling on the surface of C-ZVIbm, resulting in the reduction of Cr(VI) to Cr(III).
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Chuan Wang, Sha Wang, Cheng Song, Hong Liu, Jingxin Yang
Summary: By isolating iron particles and embedding them in Al2O3 microspheres, the electron efficiency and long-term performance of zero-valent iron have been improved. The results of this study show that ZVI-ALOX has a higher efficiency in removing Cr(VI) during long-term continuous flow and can reduce the toxicity of Cr(VI) solution.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Ruiming Zhang, Rossana Napolano, Beidou Xi, Anne Millicent Salazar, Qiantao Shi, Ying Zhao, Xiaoguang Meng
Summary: Recent studies have found that the combination of zero-valent iron (ZVI) and pyrite (FeS2) can effectively remove Cr(VI) from water. This study discovered that dissolved oxygen (DO) plays a crucial role in enhancing the removal efficiency. The presence of DO led to the oxidation of pyrite, producing protons that promote ZVI corrosion and creating dissolved sulfide, which improves the removal of Cr(VI) by forming ferrous sulfide precipitates on the ZVI surface.
Article
Chemistry, Physical
Zishen Lin, Chunli Zheng, Jieling Ren, Aibin Zhu, Chi He, Hua Pan
Summary: Sulfidated zero-valent iron (SZVI) samples were synthesized using different sulfur precursors, resulting in increased surface area and hydrophobicity. SZVI-Na2S showed the highest specific surface area and optimal hydrophobicity. Sulfidation also improved the corrosion potential and Fe0 content of SZVI. In terms of Cr(VI) removal, SZVI-Na2S exhibited the highest efficiency through enhanced adsorption, rapid reduction, and precipitation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Environmental
Sihai Zhou, Liping Wang, Qiuya Zhang, Yu Cao, Yanan Zhang, Xudong Kang
Summary: The ball-milled zero-valent iron biochar composite prepared by the ball milling method has excellent dispersion and oxidation resistance. Factors such as the mass ratio of ZVI and BC, ball milling time, dosage, and initial pH were found to affect the removal performance of Cr(VI). Biochar as a carrier effectively disperses ZVI in solution, while weak magnetic field (WMF) increases the removal efficiency of Cr(VI). Overall, the combination of biochar, WMF, and ZVI shows potential in the removal of Cr(VI).
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Meng Wang, Yingbo Chen, Yuanyuan Zhang, Ke Zhao, Xianshe Feng
Summary: A new composite adsorbent for Cr(VI) removal was developed by immobilizing PEI on the surface of ZVI particles with TA as a stabilizer. The adsorbent showed excellent stability and high selectivity for Cr(VI) removal even after exposure to air for 30 days. The mechanism of Cr(VI) removal with Fe-TA-PEI-10 was based on adsorption and reduction, making it an efficient and long-lasting reactive adsorbent for Cr(VI) removal.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Nibin K. Mathew, K. Rohith Vinod, G. Theertharaman, M. Navaneethan, S. Balakumar
Summary: Zero valent iron nanoparticles are synthesized through chemical reduction of iron salts using sodium borohydride. The nanoparticles possess a core shell structure with a passivation layer composed of iron oxides and hydroxides. The thickness of the passivation layer affects the electron transfer process, and a liquid nitrogen-assisted synthesis method is proposed to tune the physicochemical properties of the passivation layer. The liquid nitrogen-assisted nanoparticles show improved magnetic saturation and Cr (VI) reduction performance compared to room temperature-synthesized nanoparticles. The liquid nitrogen-assisted nanoparticles have a particle size distribution in the range of 10-120 nm and can reduce the concentration of 10 ppm Cr (VI) in about 15 minutes at pH 7.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Haitao Wang, Yue Wang, Zhenglong Liu, Shuangjiang Luo, Valentin Romanovski, Xianqiang Huang, Bozena Czech, Hongwen Sun, Tielong Li
Summary: This study reports the rational construction of mZVI/graphene composite (mZVI/G) through a simple and environmental-friendly mechanochemical method, achieving efficient removal of Cr(VI) in wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Jun Hou, Yan Li, Hanlin Ci, Lingzhan Miao, Guoxiang You, Jun Wu, Yi Xu
Summary: The aggregation behaviors of different materials and their effects on Cr (VI) removal were investigated. It was found that increased concentrations of sodium polyacrylate and starch alleviated the aggregation of modified zero-valent-iron nano-particles. Calcium ions and fulvic acid had different effects on the aggregation of the modified nano-particles and the removal of Cr (VI).
Article
Environmental Sciences
Wenxian Chen, Xiangwei Xu, Jinping Cui, Zhenyang Zhou, Yuyuan Yao
Summary: This study developed a novel bifunctional material that can efficiently degrade organic pollutants and eliminate hexavalent chromium. The material exhibited high apparent first-order constant and storage stability, enabling efficient degradation and removal of harmful substances at low temperatures.
Article
Biotechnology & Applied Microbiology
Chun-Yan Cao, Si-Lin Chen, Xin Wan, Min Wang, Zhi-Guo Song, Shuang Zhao
Summary: This study prepared a composite material consisting of NZVI particles supported on biochar (NZVI/BC) for the removal of Cr(VI) from polluted wastewater. The results showed that the removal efficiency of Cr(VI) was influenced by the dosage, pH, and reaction temperature of NZVI/BC.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Zhuang Tong, Qin Deng, Shengxu Luo, Jinying Li, Yong Liu
Summary: A water treatment system for the removal of heavy metal ions such as Cr(VI) has been developed, based on the immobilization of nano zero-valent iron (nZVI) on seashell powder. Under optimal conditions, the nZVI-loaded seashell powder showed a 79% increase in the removal efficiency of Cr(VI) compared to free nZVI. This study is expected to contribute to the development of environmental remediation materials using bioresource waste.
Article
Engineering, Environmental
Shun-Shun Chen, Xu-Xiu Chen, Tian-Yu Yang, Li Chen, Zheng Guo, Xing-Jiu Huang
Summary: A temperature-modulated sensing strategy was proposed to identify and determine BTEX compounds. Highly effective identification of BTEX was achieved using linear discrimination and convolutional neural network analyses. Additionally, quantitative analysis of concentration was accomplished by establishing the relationship between concentration and response.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Myungkyung Noh, Jeong Yeon Sim, Jisung Kim, Jee Hwan Ahn, Hye-Young Min, Jong-Uk Lee, Jong-Sook Park, Ji Yun Jeong, Jae Young Lee, Shin Yup Lee, Hyo-Jong Lee, Choon-Sik Park, Ho-Young Lee
Summary: This study reveals that chronic exposure to PM induces chronic inflammation and development of COPD by dysregulating NAD+ metabolism and subsequent SIRT1 deficiency in pulmonary macrophages. Activation of SIRT1 by resveratrol effectively mitigates PM-induced inflammation and COPD development. Targeting metabolic and epigenetic reprogramming in macrophages induced by PM is a promising strategy for COPD treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yu Liu, Linlin Qin, Yiming Qin, Tong Yang, Haoran Lu, Yulong Liu, Qiqi Zhang, Wenyan Liang
Summary: Co/NC/PAC electrode was prepared by compounding ZIF-67 with powder-activated carbon for the electrocatalytic treatment of nitrogen-containing heterocyclic compounds. The degradation efficiency of the four compounds reached 90.2-93.7% under optimal conditions, and the degradation order was pyridazine < pyrimidine < pyrazine < pyridine.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Julien Couturier, Pierre Tamba Oulare, Blanche Collin, Claire Lallemand, Isabelle Kieffer, Julien Longerey, Perrine Chaurand, Jerome Rose, Daniel Borschneck, Bernard Angeletti, Steven Criquet, Renaud Podor, Hamed Pourkhorsandi, Guilhem Arrachart, Clement Levard
Summary: This study analyzes the properties of bauxite residue samples and explores the influence of bauxite ore origin, storage conditions, and storage time. The results show that the speciation of yttrium is related to the origin of bauxite ore, while no significant variation was observed with storage conditions or aging of the residues.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Sakthinarenderan Saikumar, Ravi Mani, Mirunalini Ganesan, Inbakandan Dhinakarasamy, Thavamani Palanisami, Dharani Gopal
Summary: Microplastic contamination in marine ecosystems poses a growing concern due to its trophic transfer and negative effects on marine organisms. This study investigates the transfer and impacts of polystyrene microplastics in an estuarine food chain. The results show that microplastics can be transferred through the food chain, although the transfer rates are low. The exposed organisms exhibit stress responses, suggesting the potential risk of microplastics reaching humans through the food chain.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Engineering, Environmental
Yan-Jiao Li, Ying Yuan, Wen-Bing Tan, Bei-Dou Xi, Hui Wang, Kun-Long Hui, Jia-Bao Chen, Yi-Fan Zhang, Lian-Feng Wang, Ren-Fei Li
Summary: This review investigated and analyzed the distribution, composition, and abundance of heavy metals and antibiotic resistance genes (ARGs) in landfill. The results showed that heavy metals have lasting effects on ARGs, and complexes of heavy metals and organic matter are common in landfill. This study provides a new basis to better understand the horizontal gene transfer (HGT) of ARGs in landfill.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Jessy Joseph, Ari Vaisanen, Ajay B. Patil, Manu Lahtinen
Summary: Efficient and environmentally friendly porous hybrid adsorbent beads have been developed for the removal of arsenic from drinking water. The structural tuning of the adsorbents has been shown to have a significant impact on their adsorption performance, with high crystallinity leading to increased adsorption capacity and selectivity towards As5+.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yangyang Liu, Minhua Xiao, Kaiqin Huang, Juntao Cui, Hongli Liu, Yingxin Yu, Shengtao Ma, Xihong Liu, Meiqing Lin
Summary: This study measured the levels of phthalate metabolites in breast milk collected from mothers in southern China. The results showed that phthalates are still prevalent in the region, and breastfeeding contributes to phthalate intake in infants. However, the levels detected do not pose significant health risks to infants based on dietary exposure. The increasing exposure to certain phthalates calls for further research into their sources and potential risks.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhiqiang Wu, Jianxing Sun, Liting Xu, Hongbo Zhou, Haina Cheng, Zhu Chen, Yuguang Wang, Jichao Yang
Summary: Ocean depth affects microbial diversity, composition, and co-occurrence patterns of microplastic microbial communities. Deterministic processes dominate the assembly of mesopelagic plastisphere microbial communities, while stochastic processes shape the assembly of bathypelagic microbial communities. The relationships between microorganisms in the mesopelagic layer are more complex and stable, with Proteobacteria and Actinobacteriota playing important roles.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Tingting Xiao, Renjie Chen, Chen Cai, Shijie Yuan, Xiaohu Dai, Bin Dong, Zuxin Xu
Summary: Based on the efficiency of catalytic ozonation techniques in enhancing sludge dewaterability, this study investigated its effectiveness in simultaneous reduction of antibiotics and antibiotic resistance genes. The results showed that catalytic ozonation conditioning changed the distribution of antibiotics and achieved high degradation rates. It also significantly reduced the abundance of ARGs, inhibited horizontal gene transfer, and decreased the signal transduction of typical ARGs host bacteria.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yang Deng, Xiaohong Guan
Summary: This article discusses two different development approaches for ferrate(VI) technology in water treatment, arguing that process integration is a promising method that can drive technological innovation and revolution in water treatment, achieving higher treatment efficiency, reduced costs and energy consumption, and a smaller physical footprint.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhe Zhang, Lu Zhang, Zhihao Huang, Yuxin Xu, Qingqing Zhao, Hongju Wang, Meiqing Shi, Xiangnan Li, Kai Jiang, Dapeng Wu
Summary: In this study, a floating catalytic foam was designed and prepared to enhance the mass transfer in immobilized photocatalysts for wastewater treatment. The floating catalytic foam could float on the water surface and establish a temperature gradient, effectively promoting the diffusion and adsorption of target molecules during the photocatalytic process.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Muhammad Nafees, Adiba Khan Sehrish, Sarah Owdah Alomrani, Linlin Qiu, Aasim Saeed, Shoaib Ahmad, Shafaqat Ali, Hongyan Guo
Summary: The accumulation of cadmium and antibiotics in edible plants and fertile soil is a worldwide problem. This study investigated the potential of zinc oxide nanoparticles to alleviate the toxicity of both cadmium and antibiotics and promote spinach growth.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Lurui Wan, Kai Wang, Yuan Chen, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a low viscosity and high thermal stability SO2 absorbent with dual interacting sites was successfully synthesized. The absorbent showed the highest absorption enthalpy change and entropy change values among reported SO2 absorbents, and exhibited lower viscosity and comparable thermal stability to ILs.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhengwei Zhou, Guojie Ye, Yang Zong, Zhenyu Zhao, Deli Wu
Summary: This study utilized Mo powder and STPP to enhance the performance of the sodium percarbonate system in pollutant degradation. The presence of Mo and STPP resulted in a higher degradation rate of the model pollutant SMX, with low oxidant consumption. The system generated multiple active species through a series of chain reactions at different pH values, exhibiting excellent performance towards electron-rich pollutants. Furthermore, Mo demonstrated excellent stability and reusability.
JOURNAL OF HAZARDOUS MATERIALS
(2024)