Article
Engineering, Environmental
Zhuyu Sun, Chaojie Zhang, Jinchi Jiang, Jin Wen, Qi Zhou, Michael R. Hoffmann
Summary: A UV photoreductive system based on Fe(II)NTA is effective in decomposing PFOS at pH 8.0 under anoxic conditions, with degradation and defluorination efficiencies of around 60% and 29.5%, respectively. Laser flash photolysis and TDDFT calculations reveal a mechanism of UV-induced directional electron transfer from Fe(II)NTA to PFOS in a penta-coordinated metal-ligand complex.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Liquan Chu, Chaojie Zhang, Pei Chen, Qi Zhou, Xuefei Zhou, Yalie Zhang
Summary: In this study, UV/KI system was used to decompose and defluorinate PFOS. It was found that the system can effectively promote PFOS decomposition and defluorination at a lower concentration of hydrated electron source chemicals and a wider pH range. The decomposition process followed a pseudo-first-order model, and the main products were environmentally friendly ions and acids.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Zhuyu Sun, Dan Geng, Chaojie Zhang, Jiabin Chen, Xuefei Zhou, Yalei Zhang, Qi Zhou, R. Michael Hoffmann
Summary: The study found that sulfide and vitamin B12 can effectively catalyze the decomposition and defluorination of PFOS, with the primary products being F- and polyfluorinated sulfonates and carboxylates. The reaction is strongly dependent on temperature and alkaline conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Xiao-Bao Gong, Zong-Wen He
Summary: The reduction of PFOS through hydrated electron-induced reactions under UV irradiation in sulfite solution shows promising results, with factors such as reaction conditions and temperature having significant effects on the efficiency of defluorination.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Environmental Sciences
Jun Hu, Yifan Qiu, Bing Gu, Nv Yao, Zimo Lou, Zhuowei Cheng, Xianzhao Zhang, Jianming Yu
Summary: This study investigates the role of magnetite (Fe3O4) in enhancing the milling performance of zero-valent iron (Fe) for the mechanochemical destruction (MCD) of perfluorooctane sulfonate (PFOS). The results show that Fe3O4 accelerates electron transfer, reacts with Fe to produce FeO, and facilitates the formation of HO·. HO· plays a dominant role in the defluorination process, accounting for more than 67% of PFOS degradation. After the elimination of the sulfonate group, the produced radical (C7F15CF2·) undergoes stepwise defluorination or oxidation reactions to yield aldehydes and carboxylic acids.
ENVIRONMENTAL POLLUTION
(2023)
Article
Agriculture, Multidisciplinary
Mengke Song, Longfei Jiang, Dayi Zhang, Zilin Huang, Shaorui Wang, Weiping Mei, Chunling Luo, Gan Zhang
Summary: The study found that the presence of different concentrations of copper (Cu) had varying effects on PFOS, with low concentrations causing an increase in PFOS concentration in roots and high concentrations damaging root cell membranes and increasing root permeability. It was also observed that Cu inhibition of carrier proteins could lead to the suppression of acropetal translocation of PFOS, and the presence of a protein-mediated uptake pathway was evidenced by enantiomer fraction (EF) results.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Environmental Sciences
Samuel Krebsbach, Jianzhou He, Sushil Adhikari, Yaniv Olshansky, Farshad Feyzbar, Leonard C. Davis, Tae-Sik Oh, Dengjun Wang
Summary: Biochar is a cost-effective solution for removing per- and polyfluoroalkyl substances (PFAS) from water, but the specific physicochemical properties of biochars that determine their PFAS removal remain unknown. In this study, 15 biochars were produced from five feedstocks at three pyrolysis temperatures to investigate their removal efficiency of perfluorooctane sulfonate (PFOS), a type of PFAS, from water. It was found that biochar pore diameter was the most critical factor for PFOS removal, but other factors such as pore diameter/pore volume ratio, specific surface area, pyrolysis temperature, hydrophobicity, and elemental composition also played roles. Biochars with small pore diameter, low nitrogen content, and high pyrolysis temperature showed enhanced PFOS sorption. These findings contribute to the understanding of using biochars with optimized properties to remove PFAS compounds from water.
Review
Environmental Sciences
Pingwei Wang, Dongge Liu, Shuqi Yan, Jiajing Cui, Yujun Liang, Shuping Ren
Summary: This study reviews the adverse effects of PFOS on liver tissue and function, providing a reference for further research on the toxicity of PFOS and liver injury caused by PFOS.
Article
Engineering, Environmental
Pengyang Li, Jiang Sun, Xiaocan Xie, Zhifang Li, Baoyong Huang, Guoguang Zhang, Jiuyi Li, Zhiyong Xiao
Summary: Limited understanding of stress response and tolerance to perfluorooctane sulfonate (PFOS) in plants exists at physiological, biochemical, and molecular levels. Lettuce exposed to PFOS showed accumulation of PFOS in leaves and roots, with different reactive oxygen species (ROS) production and defensive mechanisms observed between the two parts. Multiple defensive strategies in roots contribute to the high tolerance to PFOS.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Pingwei Wang, Dongge Liu, Shuqi Yan, Yujun Liang, Jiajing Cui, Li Guo, Shuping Ren, Peng Chen
Summary: This study demonstrates for the first time that PFOS induces ferroptosis in HK-2 cells. Additionally, the involvement of endoplasmic reticulum stress, apoptotic mechanism, and P53-mediated antioxidant mechanism in PFOS-induced cytotoxic damage are explored. These findings provide new insights into the toxicity of PFOS and its impact on kidney damage and mechanisms.
Article
Engineering, Environmental
Jia Guo, Ying Zhang, Qiuhong Sun, Guangzhou Qu, Lai Wei, Tiecheng Wang, Hanzhong Jia, Lingyan Zhu
Summary: The study investigated the defluorination of PFOA and PFOS in a mesoporous plasma system, achieving rapid and efficient removal of fluorine and reducing their toxicities. It showed potential for actual surface water treatment with the production of shorter-chain perfluomcarboxylic acids, polyfluomalkyl substances, and alcohols as byproducts.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Manjurul Islam Chowdhury, Tanmoy Sana, Logeshwaran Panneerselvan, Anithadevi Kenday Sivaram, Mallavarapu Megharaj
Summary: This study investigated the toxicity of PFOS on the behavioral responses of C. elegans, and for the first time found its transgenerational effects. The results showed that PFOS severely affected locomotion and brood size, but these defects were rectified in the progeny after a few generations. Furthermore, PFOS also affected lifespan and chemotaxis plasticity.
Article
Environmental Sciences
Shu Yu, Wen-Ru Feng, Zi-Mian Liang, Xiao-Yun Zeng, Michael S. Bloom, Guo-Cheng Hu, Yang Zhou, Yan-Qiu Ou, Chu Chu, Qing-Qing Li, Yunjiang Yu, Xiao-Wen Zeng, Guang-Hui Dong
Summary: The study found that higher serum PFAS concentrations were associated with an increased risk of MetS, showing a significant dose-response trend, particularly impacting women.
ENVIRONMENTAL POLLUTION
(2021)
Review
Environmental Sciences
Xuelin Wang, Zhongyun Chen, Yonglei Wang, Wenjun Sun
Summary: Perfluorinated compounds (PFCs) are emerging persistent pollutants that pose a threat to human health and the environment. UV-based AOPs show good application prospects for the removal of PFCs due to their high removal efficiency. Research on various UV-based AOPs in terms of degradation pathways, efficiency, influencing factors, and by-product formation has been systematically reviewed.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Kurt A. Gust, J. Erik Mylroie, Ashley N. Kimble, Mitchell S. Wilbanks, Catherine S. C. Steward, Kacy A. Chapman, Kathleen M. Jensen, Alan J. Kennedy, Paige M. Krupa, Scott A. Waisner, Zacharias Pandelides, Natalia Garcia-Reyero, Russell J. Erickson, Gerald T. Ankley, Jason Conder, David W. Moore
Summary: This study investigated the multigenerational effects of perfluorooctane sulfonic acid (PFOS) exposure in zebrafish. Results showed that the adverse effects reported at concentrations lower than 1 μg/L in previous research were difficult to replicate. However, adverse effects at concentrations below 117 μg/L were observed, indicating an ecologically relevant threshold.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2023)
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.