Article
Engineering, Environmental
Zhuang-Song Huang, Lu Wang, Yu-Lei Liu, Hong-Yan Zhang, Xiao-Na Zhao, Yang Bai, Jun Ma
Summary: This study elucidated the crucial role of ferrate self-decomposition in oxidation reactions and developed a mechanistic kinetics model to understand the involvement of Fe(V), Fe(VI), and Fe(IV) species in the oxidation of PMSO. Results showed that the Fe(V) species derived from ferrate self-decomposition contributed significantly to PMSO oxidation, while the oxidation pathways of Fe(VI) and Fe(V) were influenced by different factors. The findings suggest the general role of Fe(V) and the potential enhancement by Fe(III) during ferrate oxidation of micropollutants.
Article
Environmental Sciences
Huiqing Ma, Xinyue Liu, Zhaoqi Wen, Xianliang Yi, Yang Liu, Hao Zhou
Summary: This study reports a competitive Mn(II) removal during the microbial-induced carbonate precipitation process under nutrient-rich conditions, revealing the important role of urease in the indirect oxidation of Mn(II).
ENVIRONMENTAL RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Tong Gu, Zhenghu Tong, Xue Zhang, Zhiyong Wang, Zhen Zhang, Tzann-Shun Hwang, Lin Li
Summary: This study demonstrates that carbon metabolism acts as a significant modulator of Mn oxide deposit amount (MnODA) and formation in a soilborne bacterium.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Geochemistry & Geophysics
Marzia Miletto, Xiangli Wang, Noah J. Planavsky, George W. Luther, Timothy W. Lyons, Bradley M. Tebo
Summary: Stable chromium isotopes have been used as a paleoredox proxy to track atmospheric oxygenation, with previous belief that Cr oxidation is limited to terrestrial settings. However, recent research shows rapid marine Cr(III) oxidation linked to microbial Mn(II) oxidation, challenging the traditional view. Initial partial oxidation of Cr(III) to Cr(VI) can cause a small isotope fractionation, calling for a reevaluation of the link between Cr isotope values and atmospheric oxygenation.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Engineering, Environmental
Juhee Kim, Junyue Wang, Daniel C. Ashley, Virender K. Sharma, Ching-Hua Huang
Summary: This study discovers that the biodegradable chelating ligand picolinic acid (PICA) can effectively mediate the activation of peracetic acid (PAA) by manganese (II), leading to accelerated degradation of micropollutants. The PAA-Mn(II)-PICA system is capable of rapidly removing various micropollutants in clean and wastewater matrices. High-valent manganese species (Mn(V)) is identified as the main reactive species contributing to the rapid degradation of micropollutants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jie Chen, Bo Sun, Yating Zhu, Youqiang Yang, Xiaohong Guan
Summary: This study reveals the significant contribution of Mn(VI/V) in contaminant abatement during the Mn(VII) oxidation process, demonstrating its important role in the degradation of various organic and inorganic contaminants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Engineering, Environmental
Yang Zong, Hua Zhang, Hao Liu, Jun Xu, Zhengwei Zhou, Xiaomeng Zhang, Ting Zhang, Deli Wu
Summary: The performance of the Mn(II)/PI process in the selective degradation of organic contaminants can be enhanced by the complexation of Mn(II) by EDTA, leading to the generation of high-valent manganese-oxo (MnV-oxo) as the dominant reactive species. Ligands analogous to EDTA can also enhance the process and favor MnV-oxo as the dominant species.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Kyriakos Manoli, Ruobai Li, Juhee Kim, Mingbao Feng, Ching-Hua Huang, Virender K. Sharma
Summary: This study introduces a Fe(VI)-peracetic acid oxidation process for rapid degradation of micropollutants in water, showing great potential for water treatment applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Wenrui Wei, Anna Wang, Kaiheng Guo, Shaoxiong He, Ailin Li, Xinwen Kang, Jingyun Fang
Summary: This study found that freshly formed manganese dioxide is effective in the degradation of micropollutants. The study also discovered the formation of reactive oxygen species, including hydroxyl radicals, superoxide radicals, and singlet oxygen, which play a crucial role in the degradation process.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
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
Environmental Sciences
Yuheng Huang, Xiaoliu Huangfu, Chengxue Ma, Ziqiang Liu
Summary: Microorganisms can oxidize Mn(II) to biogenic Mn oxides through enzyme-mediated and non-enzyme-mediated processes, which are considered as the source and sink of heavy metals. Understanding the interactions between Mn(II) oxidizing microorganisms and heavy metals is important for studying microbial-mediated self-purification of water bodies.
Article
Engineering, Environmental
Kaiheng Guo, Yifei Zhang, Sining Wu, Wenlei Qin, Yuge Wang, Zhechao Hua, Chunyan Chen, Jingyun Fang
Summary: This study reveals the differential roles of reactive bromine species in the degradation of micropollutants. Br-center dot exhibits the highest reactivity towards most micropollutants, while BrO center dot contributes predominantly to the degradation of electron-rich micropollutants. Additionally, the components of water matrix also affect the activities of bromine species.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mengfan Luo, Heng Zhang, Peng Zhou, Jiali Peng, Ye Du, Zhaokun Xiong, Bo Lai
Summary: This study discovers that graphite (GP) can improve the reactivity of Fe(VI) in the pH range of 7.0-9.0. The performance of the GP/Fe(VI) process for sulfamethoxazole (SMX) removal was evaluated, and the activation mechanism of GP was analyzed.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
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
Yuan Gao, Yang Zhou, Su-Yan Pang, Jin Jiang, Yong-Ming Shen, Yang Song, Jie-Bin Duan, Qin Guo
Summary: The study showed that the combination of Mn(II) complexes with specific ligands and persulfates can efficiently trigger oxidation of contaminants, presenting a promising environmental decontamination technology.
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
Shi-Qi Tian, Jing-Yao Qi, Yun-Peng Wang, Yu-Lei Liu, Lu Wang, Jun Ma
Summary: Biochar loaded with manganese and iron showed excellent catalytic ozonation activity, effectively removing atrazine with hydroxyl radicals as the main oxidant. The enhanced adsorption and decomposition of O-3 on the loaded biochar led to improved degradation pathways of atrazine, reducing toxicity of oxidation products significantly. This research indicates the great potential of Mn-loaded and Fe-loaded biochar for heterogeneous catalytic ozonation in water pollution treatment.
Article
Engineering, Environmental
Hai-Yang He, Wei Qiu, Yu-Lei Liu, Hua-Rong Yu, Lu Wang, Jun Ma
Summary: Ferrate pre-oxidation was found to be effective in enhancing the FeCl3/ultrafiltration treatment of algae-laden source water, leading to disruption of algae cells, formation of algae-ferric floc, and degradation of algal extracellular organic matter. This treatment also improved membrane flux, reduced membrane resistance, and removed a significant amount of dissolved organic compounds and total nitrogen compared to conventional FeCl3/ultrafiltration treatment.
Article
Engineering, Environmental
Zhuo-Yu Li, Lu Wang, Yu-Lei Liu, Pei-Nan He, Xin Zhang, Jia Chen, Hai-Teng Gu, Hao-Chen Zhang, Jun Ma
Summary: This study compared the degradation efficiency of two hydroxylamine salts on dimethyl phthalate and found that Cl- significantly improved the production of hydroxyl radicals, affecting the oxidation intermediates. It was revealed for the first time that Cl- could shift reactive species from Fe(IV) to radicals in the PMS/Fe(II) system.
Article
Engineering, Environmental
Xian-Shi Wang, Heng Song, Jing Zhang, Yu-Lei Liu, Jun Ma, Lu Wang
Summary: HOCl was found to effectively convert iodinated phenolic disinfection byproducts into non-toxic iodate and less toxic chlorinated aliphatic DBPs, reducing the acute toxicity of water samples containing iodophenols. Further investigations on the transformation and toxicity alteration of emerging DBPs during chlorination/booster chlorination are warranted due to the widespread use of chlorine as a disinfectant.
Article
Engineering, Environmental
Zhuo-Yu Li, Yu-Lei Liu, Pei-Nan He, Xin Zhang, Lu Wang, Hai-Teng Gu, Hao-Chen Zhang, Jun Ma
Summary: Hydroxylamine has been found to transform Fe(IV) into radicals (SO4 center dot- and center dot OH) during potential pollutants oxidation in Fe(II)/hydroxylamine/PDS system. Experimental results indicate that hydroxylamine promotes the production of SO4 center dot- significantly, while inhibiting the production of Fe(IV) as its concentration increases from 0.2 to 1.4 mM.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Zhuang-Song Huang, Lu Wang, Yu-Lei Liu, Hong-Yan Zhang, Xiao-Na Zhao, Yang Bai, Jun Ma
Summary: This study elucidated the crucial role of ferrate self-decomposition in oxidation reactions and developed a mechanistic kinetics model to understand the involvement of Fe(V), Fe(VI), and Fe(IV) species in the oxidation of PMSO. Results showed that the Fe(V) species derived from ferrate self-decomposition contributed significantly to PMSO oxidation, while the oxidation pathways of Fe(VI) and Fe(V) were influenced by different factors. The findings suggest the general role of Fe(V) and the potential enhancement by Fe(III) during ferrate oxidation of micropollutants.
Article
Engineering, Environmental
Xian-Shi Wang, Yu-Lei Liu, Li-Xu Xue, Heng Song, Xiang-Rui Pan, Zhe Huang, Shu-Yue Xu, Jun Ma, Lu Wang
Summary: Up to 15 disinfection byproducts (DBPs) were found in anthracite-filtered water, while DBPs were undetectable in water filtered with other materials. New anthracite-filtered water contained lower levels of dissolved organic carbon, dissolved organic nitrogen, and ammonia nitrogen compared to aged anthracite-filtered water. Organic carbon was released into the filtered water, with a small percentage being toxic and carcinogenic aromatic carbons.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Qingliang Liu, Jinan Zhu, Lu Wang, Xianshi Wang, Zhuangsong Huang, Feng Zhao, Jing Zou, Yulei Liu, Jun Ma
Summary: Microbes play a dominant role in the degradation of organic contaminants in the environment, yet there is still a lack of understanding regarding the degradation mechanism and the function of different species. This study explores the possible biodegradation of triclosan in a microbial fuel cell, investigating degradation kinetics, microbial community, and possible degradation products. Triclosan at a concentration of 5 mg/L could be degraded within 3 days, with an intermediate degradation product (2,4-dichlorophen) further degraded in the system. A total of 32 dominant bacteria (relative intensity >0.5%) were identified in the biofilm, and 10 possible degradation products were identified. By analyzing the potential bioreactions and degradation pathway based on the identified products, the biodegradation mechanism and function of the bacteria involved in triclosan degradation were clarified. This study provides valuable information for understanding the degradation mechanism of organic pollutants in mixed flora through analysis of the microbiome community and degradation pathway.
Article
Engineering, Environmental
Wei Shi, Xiaojing Liu, Yulei Liu, Dong Li, Xili Tong, Jun Ma, Lu Wang
Summary: The effect of a robust and easy-recovery catalyst, Fe2O3/Al2O3-SiC, for catalytic ozonation of hardly biodegradable COD in coking wastewater was explored. The catalyst showed a higher removal ratio of hard COD and generation speed of hydroxyl radical compared to ozonation alone. In a full-scale application, Fe2O3/Al2O3-SiC catalytic ozonation decreased ozone consumption and operation cost.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Yunpeng Wang, Zijun Xiao, Yulei Liu, Wenjie Tian, Zhuangsong Huang, Xiaona Zhao, Lu Wang, Shaobin Wang, Jun Ma
Summary: This study found that carbon quantum dots (CQDs) played a significant role in the water purification process using Fe(VI) as a catalyst. CQDs facilitated direct electron transfer (DET) from organic pollutants to Fe(VI), improving the oxidation efficiency and alleviating the negative impact of solution pH and background constituents.
Article
Engineering, Environmental
Xian-Shi Wang, Heng Song, Yu-Lei Liu, Xiang-Rui Pan, Hao-Chen Zhang, Zhi Gao, De-Zhen Kong, Rui Wang, Lu Wang, Jun Ma
Summary: The study developed a method for evaluating the removal of micrometer-sized microplastics in water treatment, and found that FeCl3 and polyaluminum chloride were the most effective coagulants for microplastic removal. Filtration and ferrate oxidation also showed some removal efficiency.
ACS ES&T ENGINEERING
(2021)
Article
Engineering, Environmental
Hai-Yang He, Wei Qiu, Yu-Lei Liu, Shu-Yue Xu, Jun Ma, Lu Wang
Summary: In the ultrafiltration of river water, a hydrophilic layer composed of ferrate can effectively attenuate membrane fouling, improve membrane flux, and reduce membrane fouling resistance. This layer is also beneficial for rejecting transphilic dissolved organic carbon and alleviating internal membrane fouling.
ACS ES&T ENGINEERING
(2021)
Article
Engineering, Environmental
Yu-Lei Liu, Yan-Ting Li, Lu Wang, Wei Wang, Jun Ma
Summary: Adding a low dosage of Mn(II) to the Fe(VI) oxidant significantly improved the removal efficiency of Tl. The formation of floc in the presence of Fe(VI) and Mn(II) facilitated the adsorption and removal of trace Tl efficiently.
ACS ES&T ENGINEERING
(2021)