Article
Engineering, Environmental
Chen Zhang, Suhong Tian, Fanzhi Qin, Yali Yu, Danlian Huang, Abing Duan, Chengyun Zhou, Yang Yang, Wenjun Wang, Yin Zhou, Hanzhuo Luo
Summary: This study utilized visible light to activate permanganate for the degradation of sulfamethazine, demonstrating the effective degradation of SMT in the VL/PM system. Factors influencing degradation and degradation mechanisms were investigated through experiments and Density Functional Theory calculations.
Article
Engineering, Environmental
Shule Duan, Huiyu Dong, Pin Hou, Zhimin Qiang
Summary: This study investigated the yield, kinetics, stoichiometry, and abatement of trace organic contaminants (TrOC) by the permanganate/bisulfite (MS) and permanganate/manganous (MM) processes. The results showed that the TrOC abatement rate in the MS process was significantly higher than that in the MM process, despite the higher rate constant of Mn(III) generation in the former. The contribution of Mn(III) to TrOC abatement was limited in both processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Erdan Hu, Wenzhong Zhang, Jun Wu, Hefa Cheng
Summary: In this study, the rapid transformation of chlorobenzenes by soluble Mn(III) in the permanganate/bisulfite process was reported. The removal of chlorobenzenes was highly efficient, especially for those with fewer chlorine atoms. Mn(III) was found to act as a strong electrophilic reagent in the degradation of chlorobenzenes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Qinghong Wu, Wenqiang Gong, Xiaoxia Li, Shuaiqi Zhao, Aimal Khan, Wei Li, Aihua Xu
Summary: The reactivity of MnO2 catalysts with different phases for Mn(VII) activation was investigated and it was found that alpha-MnO2 showed the highest rate constant for phenol degradation. The Mn(VII)/alpha-MnO2 system also efficiently degraded other phenolic contaminants. This study provides important insights into MnO2 catalysts for Mn(VII) activation and pollutant degradation.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Xuxu Wang, Ying Wang, Chun Zhao, Yunhua Zhu, Zhihua Sun, Hua-Jun Shawn Fan, Xuebin Hu, Huaili Zheng
Summary: A novel method for generating free RMnS, with ultrasound enhanced CNTs/permanganate process (UCP), has been proposed for efficient organics removal. CNTs in the UCP process can enrich manganese compounds and target contaminants, acting as an electronic platform for electron transfer. Ultrasound further regulates RMnS generation, converting inactive solid Mn(IV) into free RMnS for rapid contaminants removal.
Article
Environmental Sciences
Bo Sun, Yiqiao Zhang, Zhaoyu Gong, Jian Zhang, Jing Zhang
Summary: This study demonstrated that the presence of aniline can significantly enhance the degradation rate of bisphenol A by permanganate, with the formation of colloidal MnO2 playing a key role in the oxidation process. The reactivity of MnO2 is pH sensitive, showing higher activity under acidic conditions, which explains the observed enhancement of aniline on BPA removal by permanganate at pH < 7.0.
Article
Environmental Sciences
Jing Li, Xin Hu, Juan Wang, Youru Yao, Yong Zhang, Lixiao Ni, Shiyin Li
Summary: This study investigates the mechanism by which extracellular polymeric substances (EPS) influence the oxidation of phenol by permanganate (Mn (VII)). The results show that EPS significantly enhances the oxidation efficiency of Mn (VII) for phenol by promoting the formation and stability of EPS-MnO2 colloids.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Mengfan Luo, Heng Zhang, Yi Ren, Hongyu Zhou, Peng Zhou, Chuan-Shu He, Zhaokun Xiong, Ye Du, Yang Liu, Bo Lai
Summary: Oxyanions, natural constituents in water, have been shown to enhance the decontamination efficiency of permanganate. However, the mechanism behind this enhancement is not well understood. This study systematically investigated the role of oxyanions in regulating the structural parameters of colloidal MnO2, leading to increased autocatalytic activity of Mn(VII). The results showed that oxyanions such as bicarbonate can improve the degradation of phenol by Mn(VII) through improved autocatalytic processes and structural changes in MnO2. Other oxyanions with appropriate ionic potentials also showed similar activation mechanisms. These findings enhance our understanding of Mn(VII) oxidation behavior and provide a theoretical foundation for designing enhanced Mn(VII) oxidation systems.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Sining Wu, Kaiheng Guo, Ruijie Xie, Shaoxiong He, Wenrui Wei, Jingyun Fang
Summary: This study shows that MnO2 enhances the degradation of Mn(VII)-inert micropollutants, acting as a catalyst for oxidation reactions and its effectiveness depends on pH.
Article
Engineering, Environmental
Yang Zhou, Yuan Gao, Jin Jiang, Yong-Ming Shen, Su-Yan Pang, Yang Song, Qin Guo
Summary: The study compared the oxidation of a model fluoroquinolone antibiotic levofloxacin (LEV) by permanganate (Mn(VII)) and peroxymonosulfate (PMS), showing that both oxidants can efficiently eliminate the antibiotic activity of LEV with slightly different mechanisms. Additionally, benzo-quinone was found to have an activating effect on both PMS and Mn(VII) oxidation, although their activation mechanisms were distinct.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yang Zhou, Jianpeng Hu, Yuan Gao, Yang Song, Su-Yan Pang, Jin Jiang
Summary: This study systematically investigated the transformation of fluoroquinolones (FQs) by the oxidant permanganate (Mn(VII)) in the presence or absence of humic acid (HA) in aquatic environments. It was found that HA could accelerate the degradation of FQs by Mn(VII) oxidation, with the in situ formed MnO2 acting as a catalyst. The study also proposed an activation method based on Mn(VII) and reductants for the treatment of FQs contaminated water.
CHINESE CHEMICAL LETTERS
(2022)
Article
Engineering, Multidisciplinary
Huan Ma, Zhi Wang, Ling Qian, Gaorui Jin, Pengqi Yang, Dongfang Wang, Shengkai Xu, Dongqing Cai, Zhengyan Wu, Xin Zhang
Summary: A sunlight-sensitive microcatalyst was synthesized by loading MnO2 microspheres into KOH-modified biochar. The microcatalyst showed enhanced photocatalytic performance for the degradation of chlortetracycline in water under sunlight, and exhibited high stability and reusability.
Article
Engineering, Environmental
Chaoting Guan, Qin Guo, Zhen Wang, Xipeng Wei, Bin Han, Xiaonan Luo, Hanping Pan, Jin Jiang
Summary: This article presents a critical review of the scientific development of the bisulfite-activated permanganate process for the degradation of organic contaminants in water. Reactive manganese species and radical species are identified as the oxidizing components responsible for enhanced degradation. The presence of dissolved oxygen is crucial for driving the oxidation of organics. Similar activation pathways are found for other high-valent metal oxyanions. The article also highlights the knowledge gaps and proposes future research needs for the practical application of this oxidation technology.
Article
Environmental Sciences
Miao Lv, Hongchang Liu, Lei He, Binbin Zheng, Qinwen Tan, Muhammad Hassan, Fan Chen, Zhengjun Gong
Summary: The accumulation of antibiotics in aquatic environments poses a serious threat to human health. Photocatalytic degradation is a promising method for removing antibiotics from water. The novel MnS/PPy/GF composite achieved efficient adsorption of antibiotics, stable loading of photocatalyst, and rapid separation of spatial charge. The MnS/PPy/GF-based photocatalytic process demonstrated high removal efficiency and promising potential for antibiotic pollution control.
ENVIRONMENTAL RESEARCH
(2023)
Review
Engineering, Environmental
Juan Li, Su-Yan Pang, Zhen Wang, Qin Guo, Jiebin Duan, Shaofang Sun, Lihong Wang, Ying Cao, Jin Jiang
Summary: This study summarizes the latest research findings on Mn(VII) reactions with a wide range of EOCs, detailing aspects of reaction kinetics, oxidation products, toxicity changes, and emphasizes the impacts of intermediate manganese products. The research highlights the significant roles of manganese products in Mn(VII) oxidation processes, advancing understanding in water treatment applications.
Review
Engineering, Environmental
Tao Yang, Lu Wang, Yulei Liu, Zhuangsong Huang, Haiyang He, Xianshi Wang, Jin Jiang, Dawen Gao, Jun Ma
Article
Engineering, Chemical
Jiaming Zhang, Haoran Song, Yulei Liu, Lu Wang, Dong Li, Chao Liu, Manyu Gong, Zhongxiang Zhang, Tao Yang, Jun Ma
SEPARATION AND PURIFICATION TECHNOLOGY
(2019)
Article
Engineering, Environmental
Tao Yang, Lu Wang, Yu-Lei Liu, Wei Zhang, Hai-Jun Cheng, Min-Chao Liu, Jun Ma
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Engineering, Environmental
Tao Yang, Sisi Wu, Chunping Liu, Yulei Liu, Haochen Zhang, Haijun Cheng, Lu Wang, Lin Guo, Yuying Li, Minchao Liu, Jun Ma
Summary: ROX can be efficiently degraded by UV/chlorine, with the highest degradation rate at pH 7.5, and over 98% of total As can be removed by ferrous after UV/chlorine treatment; cytotoxicity significantly increases during the degradation of ROX, but can be greatly reduced by the combination of UV/chlorine and adsorption.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Tao Yang, Jiamin Mai, Haijun Cheng, Mengyang Zhu, Sisi Wu, Liuyan Tang, Ping Liang, Jianbo Jia, Jun Ma
Summary: This study investigated the use of UVA-LED in combination with Fe(VI) for degrading micropollutants, showing significant enhancement compared to Fe(VI) alone. Factors such as wavelength, light intensity, and pH were found to influence the degradation performance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Sisi Wu, Tao Yang, Jiamin Mai, Liuyan Tang, Ping Liang, Mengyang Zhu, Cui Huang, Qiuhua Li, Xiaoxiang Cheng, Minchao Liu, Jun Ma
Summary: In this study, effective removal of organoarsenic ROX was achieved by the combined process of chlorination + Fe(II), with chlorine degrading ROX effectively at different pH levels. The degradation of ROX was mainly attributed to the reaction between HOCl and deprotonated ROX, while humic acid inhibited this degradation. Furthermore, an enhanced removal of total arsenic was observed after chlorination, with over 97.8% of total arsenic removed.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Tao Yang, Jun Ma, Sisi Wu, Jiamin Mai, Lingrong Chen, Cui Huang, Ge Zeng, Ying Wu, Mengyang Zhu, Yuru Huang, Zongwen Mo, Lin Guo, Jianbo Jia
Summary: In this study, the Fe(VI)/sulfite process was used to effectively remove ICM and control the formation of I-DBPs in the subsequent disinfection.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Jiamin Mai, Tao Yang, Jun Ma
Summary: This paper presents a novel process using solar-ferrate(VI) for efficient degradation of micropollutants. The study found that Fe(V) and Fe(IV), rather than reactive oxygen species, played a significant role in the process. The researchers also elucidated the reaction mechanism of Fe(VI) and its degradation of micropollutants. Additionally, the study investigated the effect of pH and various ions on the degradation process. The solar-ferrate(VI) process demonstrated excellent applicability under different irradiation conditions.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Haochen Zhang, Zhiyu Zhu, Xiaoqun Zhou, Bo Tang, Jiaxin Yu, Bin Zhang, Jun Ma, Tao Yang
Summary: This study investigated the degradation of ibuprofen (IBP) in the UV/chlorine/TiO2 process. The results showed that this process had a significantly higher degradation rate than UV/chlorine and UV/TiO2, and it could remove solution toxicity more quickly. Additionally, the process generated fewer disinfection byproducts compared to UV/chlorine.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Tao Yang, Jiamin Mai, Mengyang Zhu, Qiqi Peng, Cui Huang, Sisi Wu, Qinying Tan, Jianbo Jia, Jingyun Fang, Jun Ma
Summary: This study introduced UVA-LED photolysis of Mn(VII) for degrading micropollutants and found that factors like light intensity, radiation wavelengths, pH, and water constituents affect the degradation rates of DCF and 4-CP. RMnS play a significant role in the degradation process.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Cui Huang, Tao Yang, Mingwei Li, Jiamin Mai, Sisi Wu, Juan Li, Guobiao Ma, Changyu Liu, Jianbo Jia, Jun Ma
Summary: Hexavalent chromium (Cr(VI)) was efficiently removed by activation with ultraviolet-A light-emitting diode (UVA-LED), degrading various pollutants. The generation of hydroxyl radicals (HO•) and pentavalent chromium (Cr(V)) in the UVA-LED/Cr(VI) system was confirmed. Hydroxyl radicals were identified as the dominant reactive species, aiding in the removal of pollutants in chromium-containing wastewater.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Juan Li, Tao Yang, Ge Zeng, Linqian An, Jin Jiang, Zhimin Ao, Jun Ma
Summary: In this study, a novel LED-activated periodate advanced oxidation process (UVA-LED/PI AOP) was developed and investigated for the degradation of naproxen (NPX) and other micropollutants. The UVA-LED/PI AOP showed a broad-spectrum degradation ability, with hydroxyl radical and ozone being the dominant species responsible for NPX degradation. The pH and irradiation wavelength had a negative effect on NPX degradation, explained by the decreased quantum yield of PI. The UVA-LED/PI AOP could be a promising technology for micropollutant treatment in aqueous solutions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Wenxin Song, Zhimin Gao, Fengxun Tan, Xiaoxiang Cheng, Tao Yang, Daoji Wu, Jingxin Yang, Heng Liang
Summary: The combination of calcium sulfite oxidation and ultrafiltration effectively removes algal pollutants, reduces membrane fouling, and improves membrane filter flux.
Article
Engineering, Environmental
Tao Yang, Cui Huang, Linqian An, Ge Zeng, Juan Li, Changyu Liu, Xiaolong Xu, Jianbo Jia, Jun Ma
Summary: This study reports for the first time that solar light irradiation of hexavalent chromium (Cr(VI)) can effectively degrade various micropollutants. The solar light/Cr(VI) system increases the removal efficiency of selected micropollutants by 13.3-64.8% compared to direct solar photolysis. The major reactive species in this system is hydroxyl radical (&·OH).
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.