Article
Environmental Sciences
Feiyang Sun, Yuhuan Zhu, Xinyang Liu, Zifang Chi
Summary: In this study, nanoscale zero-valent iron supported by reduced graphene oxide (nZVI/rGO) was synthesized for the removal of Se(IV) from wastewater. The effects of different environmental conditions on the removal efficiency were investigated, and the reaction mechanism was further analyzed through characterization techniques.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Pamphile Ndagijimana, Xuejiao Liu, Qingxin Xu, Zhiwei Li, Beibei Pan, Xu Liao, Yin Wang
Summary: In this study, a composite (nZVI/Ag@AC-RGO) consisting of AC, reduced graphene oxide (RGO), nanoscale zero-valent iron (nZVI), and silver (Ag) was successfully synthesized and characterized. The composite showed improved adsorption and degradation capability for trihalomethanes (THMs)-contaminated water remediation. The results indicated that the composite had good removal efficiency and adsorption capacity for THMs, and could effectively remove THMs through multilayer reaction processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
He Gu, Yuquan Gao, Mengmeng Xiong, Daofang Zhang, Weifang Chen, Zhihua Xu
Summary: This study investigated the removal efficiency of nitrobenzene by nano zero-valent iron/graphene/biochar composite modified with graphene. The results showed that graphene modification enhanced the reduction capacity of the composite, increasing the removal efficiency by releasing electrons to attack nitrobenzene molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Mingyang Song, Xiaolei Hu, Tianhang Gu, Wei-xian Zhang, Zilong Deng
Summary: In this study, a nanocellulose-based composite, NC-nZVI, was developed for efficient removal of nickel. The nZVI was anchored to nanocellulose through a liquid-phase reduction method, resulting in varied morphology and dispersion status. Among the developed composites, CNC-nZVI showed the most evenly distributed nZVI particles. The binding between NC and nZVI was achieved through hydrogen bonds, electrostatic attractions, coordination-covalent bonds, and steric hindrance. The CNC-nZVI composite exhibited significantly higher removal efficiency of Ni2+ compared to bare nZVI, and remained effective under a wide pH range and in the presence of interference ions like NO3-, Cl-, and Ca2+. The observed hollow-out structure and Tafel extrapolation curves indicated that CNC activated diffusion path and accelerated electronic transfer from nZVI. The superior removal performance of NC-nZVI and the abundance of raw materials make it a promising material for environmental remediation and wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Liming Ren, Baoning Zong, Rui Zhao, Yulin Sun, Fanbin Meng, Ruoyu Wang
Summary: In this study, the mechanism of Cr(VI) contaminated aquifer remediation using nZVI@rGO was explored through experiments and characterization analysis. The results showed that the large reactive conjugated structure of rGO enhanced the electron transfer efficiency between Cr(VI) and nZVI@rGO, while the uniform accommodation of Cr(III) precipitates on rGO effectively retarded the surface passivation of nZVI.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Hongyang Ren, Daihuimei Xue, Dan Zhao, Wenhui Jin, Xingming Gong, Baoliang Peng, Bing Wang
Summary: In this study, cobalt-doped graphene-supported nanoscale zero-valent iron (GO/nZVI-Co) was successfully synthesized and applied for the degradation of difficult-to-degrade organics. Cobalt doping enhanced the adsorption properties of the material on H2O2, facilitating the contact reaction of zero-valent iron with H2O2.
Article
Environmental Sciences
Huiping Tang, Wencai Cheng, Yunpeng Yi, Congcong Ding, Xiaoqin Nie
Summary: Fe-0/APTES-GO composites show promising results in removing U(VI) due to the reducing activity of Fe-0 and abundant functional groups on the composites. Batch experiments demonstrate the effective removal of uranium by Fe-0/APTES-GO composites.
Article
Engineering, Environmental
Takuya Ogawa, Yoshinori Kawase
Summary: The study demonstrated that nZVI mainly removes SDBS through ionic adsorption of anionic SDBS onto the positively charged nZVI surface, with different mechanisms and removal efficiencies at different pH values.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Qi Cheng, Qingrui Li, Xiaojie Huang, Xiaoqin Li, Yunyan Wang, Weizhen Liu, Zhang Lin
Summary: In this study, cauliflower-like amorphous nanoscale zero-valent iron (A-nZVI) was prepared and found to have better performance for the removal of Sb(III) compared to nZVI. A-nZVI showed higher removal capacity and selectivity for Sb(III) and was less affected by interfering anions. The findings contribute to the remediation of Sb(III) in groundwater.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Li Liang, Weiying Li, Yue Li, Wei Zhou, Jiping Chen
Summary: The study investigated the removal mechanisms of sulfidated nanoscale zero-valent iron (S-nZVI) towards EDTA-chelated CdII (CdII-EDTA) and the effects of critical factors on CdII-EDTA removal by S-nZVI. Results showed that S-nZVI had a high removal capacity for CdII-EDTA and the mechanism involved two-step replacement reactions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Chunxia Ding, Wei-ai Zeng, A-juan Zhao, Mengyun Yang, Yanlan Xie, Yaocheng Deng, Daoxin Gong, Meizheng Duan, Hailin Cai, Pengfei Xie, Yong Zhou, Zhiyong Wen
Summary: Nanoscale zero-valent iron particles loaded on montmorillonite (nZVI/Mt) were synthesized for effective removal of thiamethoxam, with the reaction conditions optimized through response surface methodology. The removal efficiency of thiamethoxam reached 94.29% under the optimal conditions, and the degradation mechanism involved reduction and elimination of the -NO2 group on the thiamethoxam molecule by nZVI/Mt.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Applied
Kaveh Hemmat, Mohammad Reza Khodabakhshi, Ali Zeraatkar Moghaddam
Summary: The study successfully removed antibiotics from aqueous media using graphene oxide supported by zero-valent iron nanocomposites, with the highest degradation efficiency observed using graphene oxide supported by Fe/Cu/Ag tri-metallic system. Various characterization methods were used to analyze the synthesized nanocomposites, and a central composite design was utilized to optimize the conditions for antibiotic removal.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Engineering, Chemical
Yujun Cheng, Haoran Dong, Tianwei Hao
Summary: In this study, calcium carbonate coated nanoscale zero-valent iron (C-nZVI) was synthesized for Cr(VI) removal. The water chemistry had an influence on C-nZVI reactivity, with NO3 showing a positive effect on C-nZVI contrary to its influence on nZVI.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Anzhou Ma, Jianpeng Ma, Xianke Chen, Guoqiang Zhuang
Summary: A synergistic removal strategy using Pseudomonas sp. JS100 and immobilized nanoscale zero-valent iron (NZVI) was proposed for the degradation of pentachlorobenzene (PeCB). The removal efficiency of PeCB reached 80.2% within 48 hours in the synergistic system. NZVI particles were dispersed and attached to the biofilter to increase the specific surface area.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Qiming Li, Meili Liu, Xuchun Qiu, Xiang Liu, Malcom Frimpong Dapaah, Qijian Niu, Liang Cheng
Summary: Carbonized melamine foam-supported nZVI composites were evaluated for efficient Cr(VI) removal. Fe@MF-12.5-800 exhibited the highest removal efficiency and remarkable stability at a neutral pH.
Article
Chemistry, Physical
Sijin Zuo, Shengcai Zhu, Jiaying Wang, Weiping Liu, Juan Wang
Summary: A N/O-codoped carbon-based catalyst with dual reaction sites was fabricated for persulfate based advanced oxidation reaction, showing efficient catalytic removal of tetracycline in water treatment. Engineering and isolating the two reaction sites on catalyst surface greatly shortened the migration distance to the target organic molecule, providing insights for the design of effective non-metal based catalysts for practical water remediation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Environmental Sciences
Xiaoqing Lin, Jie Chen, Shuaixi Xu, Tieying Mao, Weiping Liu, Jiezhen Wu, Xiaodong Li, Jianhua Yan
Summary: Calcium carbonate oligomers can be crystallized to solidify heavy metals in municipal solid waste incineration fly ash, and the addition of calcium chloride improves the solidification effect. Increasing the calcium amount enhances the solidification efficiency, while water-washing pretreatment significantly improves the solidification effect on heavy metals.
Article
Environmental Sciences
Xujun Liu, Tingjie Zhan, Yuchen Gao, Shixuan Cui, Weiping Liu, Chunlong Zhang, Shulin Zhuang
Summary: The study found that benzophenone-1 (BP-1) disrupts estrogen receptor (ER) alpha signaling pathways at environmentally relevant concentrations, triggering abnormal activation and progression of SKOV3 ovarian cancer cells.
ENVIRONMENTAL POLLUTION
(2022)
Article
Agriculture, Multidisciplinary
Jinye Huang, Manxin Bao, Jun Li, Hui Chen, Dongmei Xu, Zunwei Chen, Yuezhong Wen
Summary: This study investigates the role of trace element Fe and secondary metabolite DIMBOA in mediating the toxicity of chiral herbicides. The results show that the active enantiomer of the herbicide imazethapyr stimulates various responses in plants, including heme oxygenase-1 activity, release of Fe2+, reactive oxygen species production, and changes in DIMBOA content. Further analysis reveals that DIMBOA can chelate excessive Fe3+ to restore Fe homeostasis and relieve the phytotoxicity. This research provides new insights into improving herbicide resistance in crops.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2022)
Article
Environmental Sciences
Peiyue Wang, Xiaoqing Lin, Shuaixi Xu, Xiaodong Li, Yunfeng Ma, Weiping Liu, Jiezhen Wu, Jiamin Ding
Summary: This study investigated the removal performance of PCDD/Fs and mercury by different ACI rates in a MSW incinerator. Lower chlorinated PCDD/Fs showed higher removal efficiencies, and AC exhibited different adsorption selectivity for different PCDD/Fs congeners.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Chao Xu, Xiaohui Sun, Minhui Jin, Xuan Yang, Lizhi Zhang, Yulin Yao, Lili Niu, Jiali Shentu, Jinsong Liu, Weiping Liu
Summary: Pesticides can have long-term effects on aquatic ecosystems through transgenerational toxicity, particularly for chiral pesticides. This study evaluated the maternal transfer risk of the chiral triazole fungicide tebuconazole (TEB) in zebrafish models and found that exposure to the R-enantiomer of TEB had greater impacts on offspring malformation and swimming speed compared to the S-enantiomer. Enantioselective effects on thyroid hormones and related genes were also observed, highlighting the importance of enantioselectivity in the ecological risk assessment of chiral pesticides through maternal transfer.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Chemistry, Multidisciplinary
Jiaying Wang, Yikuan Liu, Hanfei Li, Ruihua He, Yang Guo, Jiahui Xu, Ziwei Yu, Xiaogang Liu, Weiping Liu, Zhiyuan Liu, Yihan Zhu, Juan Wang
Summary: Traditional solution-based synthesis methods have limitations in fabricating one-dimensional single-crystalline nanostructures. Here, we introduce a growth mechanism based on progressively oriented attachment, which allows the formation of single-crystalline nanowires with elongated length and moderate thickness. These nanowires can be integrated into a wearable device for multidirectional strain sensing with high responsivity and excellent stability.
Article
Environmental Sciences
Xiaomeng Yang, Yingxue Liu, Shuren Liu, Ping Zheng, Xiaoxia Bai, Lena Q. Ma, Weiping Liu
Summary: This study investigated the exposure levels and profiles of PCBs in pregnant women and newborns in Hangzhou and Mianyang, China. The results showed that the PCBs levels in the participants were lower than those in developed countries and were mainly influenced by environmental burden and dietary intake. Maternal exposure to PCB-126 was associated with increased birth weight, and certain health risks were identified. The study also found that the transplacental transfer of PCBs was influenced by log10 KOW.
Article
Engineering, Environmental
Yao Cheng, Qi An, Heshan Qi, Rui Li, Weiping Liu, Baojing Gu, Kai Liu
Summary: The spatial variation and temporal trends of PFASs in agricultural soils of Eastern China from 2011 to 2021 were evaluated. PFOS concentration decreased by 28.2% during this period, indicating the effectiveness of the Stockholm Convention and voluntary phaseout in controlling PFOS pollution. Legacy PFASs were the major components, accounting for 63.8% of total PFASs, and the contribution ratio of consumer product industries steadily increased while that of fluoropolymer industries declined.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Qi An, Lina Yang, Shengchao Yang, Yanting Wang, Long Shi, Muhammad Aamir, Weiping Liu
Summary: This study investigated the contamination levels and temporal variation of PBDEs and NBFRs in agricultural soils in China. The concentrations did not vary significantly over the past decade for PBDEs, but lower-brominated congeners increased with time. The concentrations of NBFRs also increased over time, with higher concentrations in 2021, 2016, and 2013 compared to 2011. The health risks of PBDEs and NBFRs were found to be low, but long-term health risks of BFRs should be considered.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Wangwang Luo, Yingxue Liu, Xiaomeng Yang, Muhammed Aamir, Xiaoxia Bai, Weiping Liu
Summary: In this study, the transplacental transfer of organophosphate flame retardants (OPFRs) was investigated in two cities in China. The results revealed significant differences in the overall levels of OPFRs between the two cities, as well as the detection of emerging OPFRs. The transfer efficiency of OPFRs was found to be associated with ester group and log K-ow values, and certain OPFRs were negatively correlated with birthweight of newborns.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Luoqin Shen, Ping Zhang, Yanyao Lin, Xinting Huang, Siyi Zhang, Zhiheng Li, Zhiguo Fang, Yuezhong Wen, Huijun Liu
Summary: This study investigated the toxicity of florfenicol (FF) and polystyrene microplastics (PS-MPs) on rice seedlings. FF and PS-MPs caused colloidal agglomeration, changing the behavior of FF. FF inhibited rice growth, altered antioxidant enzyme activities, impaired photosynthetic systems, and down-regulated key photosynthesis related genes. PS-MPs mitigated FF toxicity, with 10 mg/L PS-MPs being the most effective. Metabolomic analysis revealed significant alterations in metabolites and metabolic pathways, particularly in phenylalanine metabolism and the citric acid cycle.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Jianqing Ma, Nanzhengfang Jia, Huixia Jin, Sijing Yao, Kefeng Zhang, Yin Kai, Wenliang Wu, Yuezhong Wen
Summary: This study reports on the dual applications of chitosan-induced synthesis of few-layer MoS2/Fe-doped biochar (Mo-Fe0.5-CS) in Cr(VI) removal. The Mo-Fe0.5-CS composite showed high affinity for Cr(VI) and demonstrated catalytic activity for Fenton-like reactions. These findings provide insights into the effective removal and utilization of Cr(VI) in wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Jinye Huang, Jun Li, Hui Chen, Chensi Shen, Yuezhong Wen
Summary: This study focuses on the response of non-target plant wheat to (R)-imazethapyr herbicide and identifies the role of auxin and DIMBOA in alleviating herbicide stress.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Analytical
Hui Chen, Xin Shen, Yiping Ying, Xiang Li, Lili Chen, Chensi Shen, Yuezhong Wen
Summary: This study investigated the response mechanisms of algae cells under copper ion interference. It was found that the cell wall hindered the accumulation of copper and alleviated its toxicity to algae. Additionally, the addition of copper increased the accumulation of iron by algae cells and in an environment with excess copper, the total accumulation of zinc and manganese by cells also increased. The difference in total accumulation of various trace elements between wild-type and wall-less-type algae may be due to the structure and function differences between the cell wall and cell membrane.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
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.
