Article
Chemistry, Physical
Peng Fan, Xuanjun Zhang, Huanhuan Deng, Xiaohong Guan
Summary: This study successfully enhanced the removal rate, capacity, and selectivity of p-NP by utilizing C-dots@ZVI, which mainly attributed to the promoted hydrophobicity of ZVI surface, facilitated electron transfer, and accelerated corrosion.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Peng Fan, Xiaohong Guan, Guangfeng Wei, Lina Li
Summary: By simply closing the reactor, the electron efficiency and specific removal capacity of ZVI for four metal(loid)s increased significantly, while the removal kinetics was slightly affected. The consumption-redissolution process of DO and corrosion of ZVI were decelerated under closed condition, leading to improved selectivity in metal(loid)s removal.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Engineering, Environmental
Zenglu Qi, Ruiping Liu, Tista Prasai Joshi, Jianfeng Peng, Jiuhui Qu
Summary: The electrolysis-assisted nano zerovalent iron (E-nZVI) system demonstrated a high removal efficiency of Se(IV), exceeding the non-assisted nZVI system by 135%. Higher voltages did not significantly increase the reaction rate constant, indicating a complex relationship between parameters in the system.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Roman Solovov, Verbina Orlichenia, Boris Ershov
Summary: Zerovalent iron nanoparticles with spherical shape and narrow size distribution were prepared by photochemical reduction of iron(III) in isopropyl alcohol.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Haozhen Li, Jinhua Zhang, Kaili Gu, Jinxiang Li
Summary: This study investigated the impact of sulfidation on the selectivity of ZVI towards Cr(VI), finding that sulfidation significantly increased the removal rate of Cr(VI) and was mainly attributed to the involvement of FeSx. Sulfidation can tune the reactive sites and corrosion products of ZVI to improve the mass transfer and electron transfer of Cr(VI), providing a new approach to enhance the selectivity of ZVI for water decontamination.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Payel Singh, Prabir Pal, Priyanka Mondal, Govindachetty Saravanan, Penumaka Nagababu, Swachchha Majumdar, Nitin Labhsetwar, Subhamoy Bhowmick
Summary: Sulphur modified nano zerovalent iron (S?nZVI) has shown high efficiency in removing inorganic arsenic from water, especially under acidic conditions. The addition of FeS on the surface of nZVI can significantly alter the sequestration mechanism of arsenic, leading to enhanced removal efficiency in contaminated water.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Peng Fan, Yuankui Sun, Han Lei, Zixin Hu, Wei Wang, Xiaohong Guan
Summary: Mechanochemical ball-milling approach, as a clean and efficient strategy for chemical synthesis, has been developed promisingly for the preparation of functional materials for water treatment. Fe2+-ZVI(bm) synthesized through this approach showed evident superiorities for the removal of Se(VI) and other metal(loid)s, and demonstrated great potential for practical wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Shengqiong Fang, Xiaoyi Huang, Shuangling Xie, Jiale Du, Jianlong Zhu, Kai Wang, Qinglin Zhuang, Xuan Huang
Summary: A novel biochar-loaded nano-zerovalent iron composite (nZVI@CMBC) was developed and applied for the removal of hexavalent chromium in wastewater. The results showed that the nZVI@CMBC composite had a high removal efficiency of Cr(VI) under acidic conditions, with a value of 124.12 mg g(-1).
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Review
Environmental Sciences
Xiao Wang, Yue Zhang, Zhiwei Wang, Chunhua Xu, Paul G. Tratnyek
Summary: Metal(loid) oxyanions in groundwater, surface water, and wastewater can have harmful effects due to their high toxicity and lack of degradation. Zerovalent iron (ZVI) has been widely studied for the removal of these contaminants, with mechanisms including redox reactions, adsorption, precipitation, and coprecipitation. The corrosion of ZVI leads to the formation of iron oxyhydrides that sequester metal(loid) oxyanions, contributing to their removal from different types of water sources.
Article
Engineering, Environmental
Yanni Xi, Yangtao Wu, Yanfen Liu, Tanghuan Xie, Huinian Liu, Zhu Su, Yicai Huanga, Chang Zhang, Xingzhong Yuan, Xin Li
Summary: The study demonstrates the successful synthesis of sulfidated nanoscale zerovalent iron@extracellular polymeric substances (SnZVI@EPS), which exhibit superior performance in the removal and recovery of carcinogenic hexavalent chromium (Cr(VI)) compared to traditional SnZVI. The SnZVI@EPS has a larger specific surface area and better environmental friendliness, making it a promising material for Cr(VI) remediation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Xiangrui Kong, Yuecen Dong, Jianchao Wang, Shuie Yin, Dongbei Yue, Bo Jiang, Ao Shi, Cheng Chen, Yue Xia, Hongtao Wang
Summary: This study evaluated the removal of V(V) by sulfidated microscale zerovalent iron (S-mZVI) and investigated its underlying mechanism. The results showed that sulfidation significantly enhanced the removal efficiency of V(V) by ZVI, mainly through the combined functions of reduction, adsorption, and precipitation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jituo Xie, Chao Lei, Wenqian Chen, Binbin Huang
Summary: Combining conductive polymers with nanoscale zerovalent iron can effectively address the challenges of nZVI reduction by enhancing reactivity and catalytic ability. Supporting Pd/Fe nanoparticles significantly improves the removal rate of 4-chlorophenol, attributed to the highly stabilized and dispersed state, as well as the synergistic effect of electron transfer.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Jin Zhang, Hao Yu, Weijian Xu, Hongyu Shi, Xiaohong Hu, Jiang Xu, Liping Lou
Summary: Sulfidized nanoscale zerovalent iron (S-nZVI) is a promising material for degrading halogenated contaminants. However, its easy aggregation limits its application for in-situ groundwater remediation. Therefore, S-nZVI was decorated onto modified biochar (mBC) to enhance dispersity and reactivity with florfenicol (FF), resulting in significantly higher removal rates compared to S-nZVI alone.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Krishnasamy Lakshmi, Ragunathan Jayashri, Krishna Kadirvelu
Summary: Increased industrial activity has resulted in the release of large quantities of phenolic compounds and their derivatives into the environment, with 4-nitrophenol being particularly harmful to human organs. A newly developed fluorescent nanocomposite CQDs@CeO2 shows exceptional properties and has high efficiency in reducing 4-nitrophenol.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Xiangyu Wang, Xiangmei Wang, Iseult Lynch, Jun Ma
Summary: A low-cost and stable non-precious metal catalyst was developed for efficient degradation of tetracycline (TC). An electrolysis-assisted nano zerovalent iron system (E-NZVI) achieved a TC removal efficiency of 97.3% at an applied voltage of 4 V, 6.3 times higher than the NZVI system without an applied voltage. The improvement was attributed to the stimulation of NZVI corrosion, accelerating the release of Fe2+ and facilitating the conversion of ineffective ions to effective ions.
Article
Engineering, Environmental
Shasha Huang, Chunhua Xu, Qianqian Shao, Yahao Wang, Bingliang Zhang, Baoyu Gao, Weizhi Zhou, Paul G. Tratnyek
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Engineering, Environmental
Qianqian Shao, Chunhua Xu, Yahao Wang, Shasha Huang, Bingliang Zhang, Lihui Huang, Dimin Fan, Paul G. Tratnyek
Article
Engineering, Environmental
Tiantian Jia, Bingliang Zhang, Lihui Huang, Shuguang Wang, Chunhua Xu
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Engineering, Environmental
Peng Fan, Yuankui Sun, Baoxue Zhou, Xiaohong Guan
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Engineering, Environmental
Lian Zhang, Yue Zhang, Xuyan Gao, Chunhua Xu
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Engineering, Environmental
Bowei Zhang, Ying Guo, Junyu Huo, Huijun Xie, Chunhua Xu, Shuang Liang
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Engineering, Environmental
Peng Fan, Xiaohong Guan, Guangfeng Wei, Lina Li
Summary: By simply closing the reactor, the electron efficiency and specific removal capacity of ZVI for four metal(loid)s increased significantly, while the removal kinetics was slightly affected. The consumption-redissolution process of DO and corrosion of ZVI were decelerated under closed condition, leading to improved selectivity in metal(loid)s removal.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Chemistry, Physical
Peng Fan, Xuanjun Zhang, Huanhuan Deng, Xiaohong Guan
Summary: This study successfully enhanced the removal rate, capacity, and selectivity of p-NP by utilizing C-dots@ZVI, which mainly attributed to the promoted hydrophobicity of ZVI surface, facilitated electron transfer, and accelerated corrosion.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Environmental Sciences
Wen Cheng, Xuefei Zhang, Ning Duan, Linhua Jiang, Yanli Xu, Ying Chen, Yong Liu, Peng Fan
Summary: This study proposes a new method for the direct determination of high-concentration SO4-, with a wider determination range and adjustable sensitivity compared to conventional methods, achieved by using differential spectrophotometry with different optical pathlengths.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Xiao Wang, Yanshi Zhang, Yue Zhang, Chunhua Xu
Summary: This study investigated the performance of Cr(VI)-contaminated soil remediation using leaching and chemical reduction methods. The results showed that using citric acid as eluant greatly improved the removal of Cr(VI) by SZVI compared to using H2O as eluant. The prepared Cit-SZVI had more FeSx and available -COOH for chelating Cr(VI). The combination of leaching and chemical reduction proposed in this study can greatly enhance the Cr(VI) removal effect in soil, which is important for the remediation of Cr(VI)-contaminated soil.
Article
Engineering, Environmental
Yue Zhang, Zhongkai Duan, Yuhao Jin, Haixiang Han, Chunhua Xu
Summary: The effective sulfidation of ZVI relies on the chemical bridging of FeSx and ZVI, which is achieved through the in situ formation of FeSx on the ZVI surface. This leads to the bonding between the pristine ZVI and the newly formed FeSx phase, resulting in superior electron transportation activity compared to physically coated SZVI. The study elucidates the mechanism of surface generation of FeSx on ZVI and provides new perspectives for the design of high-quality SZVI for environmental applications.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Yanshi Zhang, Zhongkai Duan, Xiao Wang, Yanlu Li, Chunhua Xu
Summary: Incorporating electronegative elemental nitrogen into zero-valent iron/sulfidated zero-valent iron enhances decontamination performance, but the influence of nitrogen modification on the electrical structure of ZVI/S-ZVI is unclear. This study successfully obtained nitrogen-modified sulfidated zero-valent iron and revealed that nitrogen species bind to iron, leading to redistributed surface charges and increased electron density, which improves the conductivity of S-N-ZVI.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Chuan-Shu He, Rong-Rong Ding, Guan-Nan Zhou, Di He, Peng Fan, Xiao-Hong Guan, Yang Mu
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.
