Article
Chemistry, Applied
Yi Chen, Shuai Dong, Shiyue Wei, Shiruo Zhang, Jiaxin Zhang, Jinchuan Gu
Summary: In this study, mesoporous sodalite zeolite was synthesized rapidly using the reactive oxygen species method under UV irradiation without a template. The zeolite exhibited highly crystalline structure and abundant mesopores, and showed superior adsorption capacity and reusability in copper ion adsorption experiments.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Environmental Sciences
Chun Cai, Yangfan Liu, Rui Xu, Jiaheng Zhou, Jin Zhang, Yu Chen, Lingyu Liu, Lexiang Zhang, Shuping Kang, Xianjun Xie
Summary: In this study, a potential process using a copper ferrite catalyst activated peroxymonosulfate (PMS) system was developed for efficient removal of residual refractory organic contaminants (ROCs) in water. The key reaction parameters, water quality components, main reactive oxygen species (ROS), probable degradation mechanism, rational degradation pathways, and catalyst stability were investigated. The results showed that the system achieved a 95.0% removal of Acid Orange 7 (AO7) at specific conditions, and both sulfate radical and hydroxyl radical were identified as the predominant radical species. The presence of bicarbonate was found to enhance the degradation efficiency, and the CuFe2O4 particles demonstrated good recyclability with acceptable leaching concentration of Cu. This work may provide a safe and sustainable technique for the elimination of ROCs from complex wastewater.
Article
Engineering, Environmental
Yuyang Qin, Hongjing Li, Jun Ma
Summary: This study assessed the impact of chloride ion on the degradation of organic contaminants by thermally activated peroxymonosulfate. The results showed that chloride ion significantly increased the degradation efficiency of organic contaminants and the primary degradation pathways depended on the structure of the contaminants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Ruohan Zhang, Maolian Chen, Zhaokun Xiong, Yong Guo, Bo Lai
Summary: In this study, iron/copper bimetallic oxides (CuO@FexOy) were prepared using natural mackinawite (FeS) as a precursor. The CuO@FexOy catalyst exhibited highly efficient capacity to activate peroxydisulfate (PMS) for the degradation of various emerging pollutants. The main reactive oxygen species in the CuO@FexOy/PMS system were identified as hydroxyl radicals and sulfate radicals, with sulfate radicals being the primary reactive species. The catalytic system showed good activity and reusability in different water bodies and long-term running.
CHINESE CHEMICAL LETTERS
(2022)
Article
Engineering, Environmental
Yanlan Zhao, Hou Wang, Xiaodong Li, Xingzhong Yuan, Longbo Jiang, Xuwu Chen
Summary: The study focused on developing a method to recycle spent lithium-ion battery anodes into efficient heterogeneous catalysts for degrading organic contaminants. The recycled anode material showed high effectiveness in activating peroxymonosulfate and was capable of degrading a wide range of organic pollutants, making it a promising approach for environmental remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Bingkun Huang, Zhaokun Xiong, Peng Zhou, Heng Zhang, Zhicheng Pan, Gang Yao, Bo Lai
Summary: This study presents a Co2+/PMS/H3BO3 system that can effectively generate ROS with ultra-low Co2+ dosage, showing fast reactivity towards various pollutants. The introduction of borate buffer significantly promotes the generation of ROS, with the key substance inferred as H2BO3--MS. Through theoretical and experimental analyses, the system's high performance is attributed to a turnover frequency much higher than current research.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Shuyin Zhang, Jing Zou, Jiawen Li, Yixin Huang, Jianying Wu, Xiaobin Liao, Qingsong Li, Baoling Yuan, Jun Ma
Summary: This study introduced sodium metaborate (NaBO2) into the thermal/PMS system to enhance the degradation of acetaminophen. NaBO2 showed better performance than sodium tetraborate in accelerating acetaminophen degradation at a wide pH range. The system produced 1O2 and HO· as the main ROS responsible for acetaminophen degradation. Three elimination pathways for acetaminophen were proposed based on the identified intermediates. NaBO2 dosage, PMS concentration, and reaction temperature were found to accelerate acetaminophen removal. Cl- and Br- promoted acetaminophen removal, while humic acid had an adverse effect. Additionally, NaBO2 significantly inhibited the production of chlorinated by-products in Cl--containing water treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Xiao Shang, Xitao Liu, Wenbo Ren, Jun Huang, Zhou Zhou, Chunye Lin, Mengchang He, Wei Ouyang
Summary: The combination of microwave and persulfate (peroxodisulfate and peroxymonosulfate) was found to have a synergistic effect on the degradation of chlorpyrifos in soil. Microwave played both non-thermal and thermal effects in activating the persulfate, leading to superior degradation of chlorpyrifos. Different reactive oxygen species were generated in the two systems, resulting in different degradation pathways and products. Appropriate reaction conditions were determined. Environmental factors and the different selectivity of reactive oxygen species affected the degradation efficiency. The study evaluated the practical significance of the microwave/persulfate approach for CPF-contaminated soils.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Hanxiao Chen, Zhaoyi Han, Shiyi Cao, Yinghao Li, Xin Kang, Cheng Cheng, Xuantong Chen, Yin Xu, Hui Zhang
Summary: For scale-and performance-oriented defect engineering, a highly predigested mechanochemical paradigm was conceived to convert spent Fe-based foodstuff deoxidizers into mechanochemistry-derived catalysts. The physicochemical properties of the catalysts were characterized, and the formation of oxygen vacancies (OVs) involving the actions of mechanical energy and reductive carbon components was justified. The catalysts efficiently activated peroxymonosulfate for contaminant elimination and bacteria inactivation in water.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Anlin Xu, Donghong Wu, Ren Zhang, Siyan Fan, Albert T. Lebedev, Yongjun Zhang
Summary: This study developed an innovative bio-synthesis method using a strain of manganese oxidizing bacteria to prepare multiple metal oxides for degrading moxifloxacin. The study found that the cultivation time, dosage of cobalt, and polishing method were key parameters in regulating the activation performance of the metal oxides. The biologically synthesized metal oxides showed higher degradation efficiency compared to chemically synthesized ones.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Tong Liu, Kangping Cui, Chen-Xuan Li, Yihan Chen, Qi Wang, Xinrui Yuan, Yawen Chen, Jun Liu, Qiang Zhang
Summary: Recently, the ecological toxicity, persistence, and prevalence of pharmaceutical and personal care products (PPCPs) in aquatic environments have raised concerns. Peroxymonosulfate-based advanced oxidation processes (PMS-AOPs) have shown promise in eliminating PPCPs due to their strong oxidation ability and adaptability. This review summarizes the types, sources, fates, and ecological toxicities of PPCPs, as well as the preparation and modification methods of biochar-based catalysts for activating peroxymonosulfate (PMS). It also discusses the application of biochar-based multifunctional nanocomposites in activating PMS to remove PPCPs, along with the influencing factors and degradation mechanisms involved. Additionally, the study proposes future research directions for the industrial application of biochar-based nanocomposites. Overall, this study provides valuable insight for the efficient removal of PPCPs using biochar-based catalysts in PMS-AOPs.
Article
Engineering, Environmental
Shakeel Ahmad, Xiaomei Liu, Jingchun Tang, Shicheng Zhang
Summary: This review provides a comprehensive overview of the synthesis, characterization, and application of nZVI/BC for the removal of nitro and chlorinated contaminants. The study discusses the distribution and adverse effects of these contaminants in the environment, as well as the effect of influencing factors during the remediation process. It also covers the aging and reusability of nZVI/BC, and the outcomes of reductive and oxidative degradation mechanisms. The review also examines the cost and environmental implications of nZVI/BC synthesis and contaminant remediation processes, and concludes with future research prospects in progressive environmental remediation using nZVI/BC.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Xueyue Mi, Pengfei Wang, Shizhe Xu, Lina Su, Hui Zhong, Haitao Wang, Yi Li, Sihui Zhan
Summary: This study demonstrates a strategy to regulate the generation of reactive oxygen species by atomically dispersed cobalt anchored on nitrogen-doped carbon, with singlet oxygen being the predominant reactive oxygen species. The generated singlet oxygen is capable of degrading various organic pollutants efficiently across a broad pH range, providing new theoretical support for the singlet oxygen generation mechanism in peroxymonosulfate activation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
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
Chemistry, Applied
Chao Li, Chenjie Song, Hui Li, Liqun Ye, Yixue Xu, Yingping Huang, Gongzhe Nie, Rumeng Zhang, Wei Liu, Niu Huang, Po Keung Wong, Tianyi Ma
Summary: Fluorinated V2AlC is a durable vanadium-based catalyst showing high and constant activity in peroxymonosulfate (PMS) activation for organic pollutant degradation. The catalyst exhibits extremely low ion leakage and induces the main reactive oxygen species O-1(2) due to a two-dimensional confinement effect. The introduction of fluorine also changes the adsorption mode of tetracycline and reduces the toxicity of degradation intermediates.
CHINESE JOURNAL OF CATALYSIS
(2022)