Article
Engineering, Environmental
Yihao Li, Lu Jiang, Rui Wang, Pingxiao Wu, Juan Liu, Shanshan Yang, Jiahao Liang, Guining Lu, Nengwu Zhu
Summary: This study investigates the oxidation mechanism of phenolic compounds by ferrate (Fe(VI)), showing increased degradation rates at higher pH levels. It identifies 14 degradation products, proposes two possible pathways, and highlights the crucial role of hydroxyl radicals in the degradation process. Density functional theory calculations reveal preferences for chlorine atom substitution over hydrogen atom and ortho-position substitution over para-position for all four compounds, providing valuable insights for environmental remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biotechnology & Applied Microbiology
Meng Zhang, Zhiyong Luo, Yiwen Luo, Jun Zhai, Zhihui Wang
Summary: The research comprehensively investigated the influence of pH on the degradation of 2,4,6-trichlorophenol (TCP) by ferrate(VI) (Fe(VI)), showing that Fe(VI) has significant potential to remove TCP and pH strongly influences TCP degradation by Fe(VI).
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Yu Mao, Zhuo Chen, Yun Lu, Ke-Fan Cao, Yin-Hu Wu, Hong-Ying Hu
Summary: This study systematically investigated the effects of pH, organic matters, and inorganic ions on Fe(VI) disinfection. Results showed that pH was the dominant influencing factor, and organic matters and inorganic ions had different effects on the inactivation of Escherichia coli.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Wei Gao, Xiaofang Yang, Xinmeng Zhu, Shan Zhao, Jianwei Yu, Dongsheng Wang, Min Yang
Summary: Identification of the odor characteristics of wastewater sludge is crucial in evaluating sludge quality and disposal options. This study used sensory and instrumental analysis to examine the variation of odor characteristics in sludge treated with advanced anaerobic digestion. Volatile sulfur compounds, indole, 3-methylindole, and geosmin were identified as key odorants. The dewatering process improved the sludge odor by reducing the concentration of volatile sulfur compounds. The study also found that the quality of sludge after anaerobic digestion affected the emission capacity of certain odorants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Yu Mao, Zhuo Chen, Yun Lu, Ke-Fan Cao, Yinhu Wu, Hong-Ying Hu
Summary: This study investigated the disinfection efficacy of Fe(VI) on different bacteria in various water matrices. The results showed that Fe(VI) was more effective against Gram-negative bacteria and performed better in a phosphate buffer. It was also observed that Fe(VI) primarily reacted with proteins. These findings contribute to a better understanding of the mechanisms behind Fe(VI) disinfection and provide useful information for its application in water disinfection.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Xiaolei Teng, Yumeng Qi, Cheng Qin, Xiaosheng Tang, Chao Yan, Zunyao Wang, Ruijuan Qu
Summary: This study systematically investigated the oxidative degradation of chlorophene (CP) and 4-tert-butylphenol (4-tBP) in the presence of fer-rate (Fe(VI)). The reactions of the two phenols were found to be more efficient in mixed solution compared to single solution. Liquid chromatography-time-of-flight-mass spectrometry (LC-TOF-MS) analysis identified the reaction intermediates and proposed three possible pathways for the transformation of CP and 4-tBP. The density functional theory (DFT) calculations further elucidated the mechanism of hydroxylation and coupling product formation. The salt bridge experiment confirmed enhanced electron transfer between the organic pollutants and Fe(VI) in the mixture solution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Environmental Sciences
Phuong Minh Nguyen, Phuc Thi Do, Yen Bao Pham, Thi Oanh Doan, Xuan Cuong Nguyen, Woo Kul Lee, D. Duc Nguyen, Ashiwin Vadiveloo, Myoung-Jin Um, Huu Hao Ngo
Summary: This study provides an overview and critical discussion on the roles, mechanisms, and environmental applications of sulfur-oxidizing bacteria (SOB). The findings reveal the involvement of key enzymes in the oxidation of various sulfur compounds. Environmental applications of SOB include detoxifying hydrogen sulfide, soil bioremediation, and wastewater treatment. Future prospects in SOB development include S0 recovery, SOB enrichment, field measurement and identification of sulfur compounds, and the development of mathematical simulation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Ji Shu, Kanming Wang, Virender K. Sharma, Xiping Xu, Nasri Nesnas, Hongyu Wang
Summary: This paper introduces the Fe(VI)-Ti/Zn layered double hydroxide (Fe(VI)-Ti/Zn LDH) composite as a catalyst to degrade organic pollutants under visible light. The Fe(VI)-LDH/VL system effectively activates Fe(VI) and enhances electron-hole separation and migration on the Ti/Zn LDH surface. The in-situ heterojunction photocatalyst formed by adsorbing Fe(III) particles onto the LDH surface further oxidizes pollutants. The study demonstrates the potential of Fe(VI)-Ti/Zn LDH composite in water purification.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Li Chen, Weiguang Li, Yi Zhao, Yujie Zhou, Shumei Zhang, Liqiang Meng
Summary: The facultative chemolithotroph strain Cohnella thermotolerans LYH-2 was found to significantly reduce H2S emissions and accelerate the composting process in sewage sludge composting, demonstrating its potential as an effective agent for odor control and maturation promotion.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Feiqiang He, Xinyu Zhu, Lirong Zhong, Zhuyao Li, Yong Qian
Summary: This study proposed a process of nitric oxide absorption using ferrate (VI)/urea. Through experimental and response surface analysis, the optimal parameters for achieving 85.2% nitric oxide absorption were determined.
CHINESE CHEMICAL LETTERS
(2021)
Article
Engineering, Environmental
Xiaowu Dan, Zhiyong Luo, Mei Dai, Meng Zhang, Xiao Yue, Shili Xie
Summary: The study demonstrates that Fe(VI) can efficiently remove 4-CP in water treatment, with optimal degradation occurring at pH 9.20 and complete degradation of 4-CP achieved at a 5:1 mole ratio. The reaction rate of Fe(VI) with 4-CP is pH-dependent, with the rate-determining step being the reaction between deprotonated Fe(VI) and deprotonated 4-CP.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Mei Dai, Zhiyong Luo, Yiwen Luo, Qing Zheng, Bingwen Zhang
Summary: This study investigated the kinetics, performance, and mechanism of Fe(VI) oxidation degradation of 2,6-DCP, and found that Fe(VI) has efficient removal efficiency for 2,6-DCP, especially under higher molar ratio conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Lalhmunsiama, Levia Lalthazuala, Diwakar Tiwari
Summary: This study assessed the degradation of sulfamethazine (SMZ) using freshly synthesized ferrate (VI) and extensively investigated its application in real water matrices. The results showed that ferrate (VI) had a good performance in degrading SMZ, and its removal efficiency was almost unaffected in real water samples. This implies the feasibility and environmental benefits of using ferrate (VI) for treating emerging water pollutants and improving the efficiency of existing wastewater treatment plants.
ENVIRONMENTAL ENGINEERING RESEARCH
(2022)
Article
Medicine, General & Internal
Agata Dudzik, Sarkis Sozkes, Ewa Michalak, Iwona Olszewska-Czyz
Summary: The study found that using zinc lactate mouthwash in combination with tongue scraping is an important hygienic procedure to reduce intra-oral halitosis.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Engineering, Environmental
Jie Li, Ye Du, En -Yu Zhao, Yanni Jiang, Zhongjuan Wang, Heng Zhang, Peng Zhou, ZhaoKun Xiong, Bo Lai
Summary: The traditional Fe(VI) treatment process does not fully utilize fresh iron flocs. This study proposes a novel Fe(VI) flocs recycling process, where the flocs are recycled into the front-end reactor and further react with Fe(VI). Compared to Fe(VI) alone, the CODCr and TP of hospital wastewater decreased when treated with Fe(VI) flocs recycling process. However, the removal of NH3-N and TOC was limited. Moreover, the Fe(VI) flocs recycling process showed the best performance in purifying wastewater compared to polymeric ferric chloride and ferric chloride.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Environmental Sciences
Jinbo Liu, Chi Zhang, Hanzhong Jia, Eric Lichtfouse, Virender K. Sharma
Summary: This paper reviews the dissipation of PAHs in soils through abiotic processes such as photodegradation and oxidation. It discusses the role of soil components in degradation rates, pathways, and mechanisms, as well as the potential risks of abiotic transformations.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yinghao Wen, Eric Lichtfouse, Virender K. Sharma, Xingmao Ma
Summary: The persistence of recalcitrant pollutants in water is a major health issue. This study investigated the effect of phosphate on the degradation of atrazine by peroxydisulfate under visible light. The presence of phosphates was found to significantly decrease the efficiency of atrazine removal, due to the formation of less reactive phosphate radicals.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Cheng Chen, Yongyi Wang, Yajing Huang, Jian Hua, Wei Qu, Dehua Xia, Chun He, Virender K. Sharma, Dong Shu
Summary: This study found that pollutants containing phenolic moiety can greatly enhance the efficiency of the Fe(III)/H2O2 system without catalyst in degrading pollutants. Kinetics analysis revealed the self-catalytic degradation of the pollutants, with the best performance observed at pH 4.0. Spectroscopic measurements and theoretical calculations revealed a previously overlooked self-catalytic mechanism involving the formation of a yellow-colored high-spin P-Fe(III)-OOH complex, which subsequently converts to Fe(II). The oxidation of phenolic moiety generates hydroquinone, which also facilitates the cycling of Fe(III)/Fe(II) and the generation of hydroxyl radicals responsible for efficient decontamination.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Biochemistry & Molecular Biology
Adam Tolgyesi, Attila Cseh, Andrea Simon, Virender K. Sharma
Summary: The study aimed to develop a method for analyzing multiple groups of food contaminants, including 266 pesticides, 12 mycotoxins, 14 alkaloid toxins, and 3 Alternaria toxins. The method used QuEChERS sample preparation and LC-MS/MS analysis under alkaline mobile phase conditions. The developed method has been successfully validated through satisfactory analyses of various quality control, proficiency test, and validation samples.
Review
Chemistry, Physical
Manpreet Kaur Ubhi, Manpreet Kaur, Jaspreet Kaur Grewal, Virender K. Sharma
Summary: This article reviews the different synthesis routes of phosphorous- and boron-doped graphene and their applications in supercapacitors, lithium-ion batteries, and electronic devices such as fuel and solar cells. The direct and post-treatment methods are discussed, with the latter offering a more stable and controllable technique that preserves the original graphene structure. The review also highlights the latest progress in using phosphorous and boron-doped graphene for energy-related applications.
Review
Environmental Sciences
Nisha Singh, Meshal M. Abdullah, Xingmao Ma, Virender K. Sharma
Summary: The increasing use of plastic products in agriculture has led to the accumulation of microplastics and nanoplastics in agricultural soils, which raises concerns about their impact on soil health, crop productivity, and food safety. The interaction between plants, soil, and microplastics/nanoplastics can negatively affect plant growth and induce oxidative stress. However, the current knowledge about the fate and impact of microplastics/nanoplastics in the plant-soil nexus is limited, hindering further progress in this field. This review aims to address this gap by summarizing the sources, investigation techniques, impact on soil properties, accumulation in plants, and possible phytotoxicity mechanisms of microplastics/nanoplastics in agriculture.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Christopher V. Marbaniang, Krishnamoorthy Sathiyan, Thomas J. McDonald, Eric Lichtfouse, Poulami Mukherjee, Virender K. Sharma
Summary: The global contamination of water resources by organic contaminants necessitates the development of advanced remediation techniques. Conventional water treatments are inadequate and can produce toxic byproducts. Safer alternatives, such as treatment with ferrate, are required. This review focuses on the synthesis and activation of ferrate(VI), specifically discussing different synthesis methods and the activation of ferrate(VI) by various metal ions. The most effective systems for removing organic contaminants from contaminated water are compared.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Virender K. Sharma, Junyue Wang, Mingbao Feng, Ching-Hua Huang
Summary: The occurrence of micropollutants in water poses a threat to public health and the environment. The addition of certain amino acids can enhance the removal efficiency of these micropollutants by ferrate(VI).
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Engineering, Environmental
Mingzhu Liu, Nannan Wu, Xiaoyu Li, ShengNan Zhang, Virender K. Sharma, Jamaan S. Ajarem, Ahmed A. Allam, Ruijuan Qu
Summary: This study investigated the oxidation reaction of benzophenones, commonly used UV filters, by the oxidant potassium permanganate (KMnO4). The addition of potassium permanganate enhanced the reaction rate and efficiency. The degradation of benzophenones involved hydroxylation, bond breaking, polymerization, and carboxylation processes. Toxicity assessments revealed that the intermediate products formed during the degradation process posed a decreasing ecological risk.
Article
Engineering, Environmental
Cen Zhao, Luis E. Arroyo-Mora, Anthony P. DeCaprio, Dionysios D. Dionysiou, Kevin E. O. 'Shea, Virender K. Sharma
Summary: The study demonstrates the effective degradation of the cyanotoxin CYN and its model compound 6-HOMU using ferrate(VI) oxidation. The uracil ring of CYN is oxidized and cleaved, leading to the generation of nontoxic cylindrospermopsic acid. This method shows promise for the treatment of CYN and uracil-based toxins in drinking water.
Review
Chemistry, Multidisciplinary
Shengqi Zhang, Kaiting Zhang, Yuwei Xie, Yao-Yin Lou, Eric Lichtfouse, Mingbao Feng, Virender K. Sharma
Summary: The demand for clean water is increasing worldwide, but wastewater decontamination is limited by refractory organic and inorganic compounds, requiring more efficient treatment methods. This review discusses the use of ruthenium-based catalysts for polluant removal or transformation at a concentration range of 1.0-100 mg/L under acid or neutral conditions. Various catalytic oxidation and reduction methods, as well as the environmental impact of ruthenium catalysts, are examined, including electrooxidation, photocatalytic oxidation, activation of inert oxidants, hydrogen-assisted reduction, electroreduction, and N-O bond activation.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Environmental
Binglin Guo, Junyue Wang, Krishnamoorthy Sathiyan, Xingmao Ma, Eric Lichtfouse, Ching-Hua Huang, Virender K. Sharma
Summary: Low levels of natural organic matter (NOM) enhance removal of trimethoprim and sulfamethoxazole by ferrate(VI) through the formation of more reactive Fe(V) species. The presence of antibiotics in water sources threatens public health and ecosystems. Nine types of NOM and NOM model compounds were found to improve the removal of trimethoprim and sulfamethoxazole by ferrate(VI) under mild alkaline conditions, possibly due to the presence of phenolic moieties in NOMs. The formation of Fe(V) through single-electron transfer from NOM to Fe(VI) generates NOM radicals within milliseconds, resulting in the enhanced removal of antibiotics despite concurrent reactions between Fe(V) and NOM moieties, radicals, and water. Humic and fulvic acids from lake and river waters also showed similar results, supporting the enhanced abatement of antibiotics in real water situations.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Engineering, Chemical
Poulami Mukherjee, Krishnamoorthy Sathiyan, Tomer Zidki, Mallikarjuna N. Nadagouda, Virender K. Sharma
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Untika Pengsomjit, Waleed Alahmad, Pakorn Varanusupakul, Sibel A. Ozkan, Virender K. Sharma, Charoenkwan Kraiya
Summary: This paper presents a greener methodology for determining streptomycin in honey using gel electromembrane extraction (G-EME) technique with exfoliated graphene (EG). The addition of EG enhances the extraction efficiency and sensitivity. The problem of increased electric current and electroendosmosis due to graphene-based nanomaterials is solved by tuning the acceptor phase's volume.
Review
Chemistry, Multidisciplinary
Virender K. Sharma, Xingmao Ma, Radek Zboril
Summary: Water is a crucial component of the United Nations' sustainable development goals, and water reuse is becoming increasingly accepted in response to global water scarcity. However, traditional treatment processes face challenges in treating low concentrations of pollutants in the presence of other chemicals. Advanced oxidation processes and the use of single atom catalysts offer promising solutions to these challenges.
CHEMICAL SOCIETY REVIEWS
(2023)