Article
Chemistry, Applied
ZhiJian Li, QingQing Wang, FuJuan Dai, HaiFeng Li
Summary: The study found that the Se(IV)-resistant Lactobacillus paralimentarius strain JZ07 has high selenium biotransformation ability, which can produce red elemental selenium nanospheres and play an important role in selenium bioaccumulation. The sulfur content in the cells increases significantly in the presence of Se(IV), resulting in changes in cell morphology.
Article
Engineering, Environmental
Jun Wu, Jian Zhao, Hao Li, Lingzhan Miao, Jun Hou, Baoshan Xing
Summary: The study showed that Se(IV) acted as an oxidant to activate nZVI, thus improving the reactivity of nZVI towards Se(VI), which indicates a potential application of nZVI in the remediation of Se(IV) and Se(VI) containing water.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Microbiology
JinLan Huang, DaiHua Jiang, MingShi Wang, XueJiao Huang
Summary: In this study, a bacterial strain named Proteus mirabilis QZB-2 with high selenite resistance was isolated from lateritic red soil. The strain has the capability to reduce selenite to selenium nanoparticles (SeNPs) at a rapid rate.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Engineering, Chemical
Kangchun Li, Shuai Zou, Gang Jin, Jing Yang, Mingyuan Dou, Ling Qin, Haifeng Su, Fuchuan Huang
Summary: Metal-organic framework materials (MOFs) and MOFs-based composites have been widely used for adsorbing heavy metals due to their large surface area and porosity. In this study, MOF-801 and its composite Fe3O4/MOF-801 were prepared and used as adsorbents to capture Se(IV) in water solution. The maximum adsorption capacity of Fe3O4/MOF-801 was higher than MOF-801, and coexisting anions had minimal effect on Se(IV) adsorption. The mechanisms of Se(IV) removal by the two adsorbents were thoroughly analyzed using Zeta potential, FTIR, and XPS. XPS analysis confirmed the presence of charge transfer in Fe3O4/MOF-801, which facilitated Se(IV) adsorption and reduction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Arindam Sinharoy, Piet N. L. Lens
Summary: In this study, the reduction of selenite and selenate using waste activated sludge and hydrogen as electron donor was investigated. The results showed that both selenite and selenate could be efficiently removed using H-2 within 8 days. The production of byproducts was minimal and the reduction process was characterized.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Microbiology
Zijie Zhou, Lin Zhu, Yixuan Dong, Lexing You, Shixue Zheng, Gejiao Wang, Xian Xia
Summary: A novel protein, FesR, was identified to be associated with chromate and selenite resistance, and its mechanism of action in reduction processes was determined.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Liping Liang, Weishou Tan, Yuanyuan Xue, Fenfen Xi, Xu Meng, Baowei Hu, Juanshan Du
Summary: A novel strategy utilizing sulfide modified zero valent iron (S-ZVI) combined with magnetic field (MF) has been developed for the removal of selenite (Se(IV)). The study found that the optimal enhancement effects of MF on Se(IV) removal by S-ZVI can be achieved by controlling the size of ZVI particles, S/Fe ratio, solution pH, S-ZVI loading, and MF intensity. The MF can alleviate the promoting or inhibiting effects of coexisting ions on Se(IV) removal and preserve the reactivity of S-ZVI. Furthermore, MF can enhance the reactivity of S-ZVI during consecutive experiments and improve the stability and recyclability of S-ZVI. XANES analysis revealed that the reduction product of Se(IV) with or without MF is primarily Se(0), and Se(IV) removal by S-ZVI is attributed to adsorption and reduction. This work suggests that MF may expand the application of S-ZVI for pollutant removal in environmental remediation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Sangmin Won, Myung-Gyu Ha, Dinh Duc Nguyen, Ho Young Kang
Summary: This study isolated four selenite-reducing bacteria from a river water sample, with strain NDSe-7 showing efficient selenite reduction capability under alkaline and high salinity conditions. These extremophilic microorganisms demonstrate potential for selenium removal and recovery from industrial wastewater.
ENVIRONMENTAL POLLUTION
(2021)
Article
Biochemistry & Molecular Biology
Qingdong Wang, Chunyue Wang, Shanshan Kuang, Dezhen Wang, Yuhua Shi
Summary: A highly efficient probiotic bacterial strain, Pediococcus acidilactici DSM20284, was isolated and shown to have a reduction rate of up to 98% for selenite to elemental selenium. The synthesised selenium nanoparticles (SeNPs) exhibited remarkable antibacterial and antioxidant activities. These SeNPs have potential safe applications in biomedical and nutritional fields.
Article
Nanoscience & Nanotechnology
Yuhan Sun, Minghui Li, Xiaolei Qu, Shourong Zheng, Pedro J. J. Alvarez, Heyun Fu
Summary: The Pt/CNT@CN catalyst showed higher initial activity and better stability compared to commercial Pt/C and uncoated Pt/CNT, making it an effective approach for removing Se(IV) in water.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Lingli Li, Qi Liao, Bingchao Hou, Chuanshu He, Jiamei Liu, Bingrui Li, Ming Yu, Yucheng Liu, Bo Lai, Bing Yang
Summary: A functionalized magnetic chitosan beads (MCB-ECH-SH/SO3H) was found to efficiently remove hexavalent chromium (Cr(VI)) from wastewater by reducing it to less toxic trivalent chromium (Cr(III)). The material also exhibited high stability, strong reducing capacity, easy recycling, making it an ideal candidate for treating chromium-containing wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Chang Zhu, Xiaoxiao Huang, Gang Yang
Summary: This study reveals the central role of cysteine (Cys) in the bioreduction of chromium (Cr) and provides insights into the mechanisms and product distribution. The effects of Cys coverage, active sites, and reducing agent are discussed. The results contribute to the understanding of Cr bioremediation and catalyst design for Cr reduction.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Physical
O. Czompoly, M. Fabian, T. I. Koranyi, G. Nagy, Z. E. Horvath, I. Zizak, S. Pollastri, M. Aertsens, J. Osan
Summary: This study investigates the adsorption and diffusion behavior of selenite in Boda Claystone Formation (BCF), a potential host rock for high-level radioactive waste disposal. The experiments were conducted on two different core samples, and the adsorption kinetics, isotherms, and reversibility were studied. The distribution coefficient was found to be approximately 200 L/kg, with a decrease observed at equilibrium concentrations of 10-6-10-7 M. Diffusion experiments revealed an apparent diffusion coefficient of (1.5-4.3) x 10-14 m2/s and a rock capacity factor of 1.4-2.2 for selenite. The oxidation state of the adsorbed selenium remained +IV, except for reduction observed in the presence of pyrite.
APPLIED CLAY SCIENCE
(2023)
Article
Cell Biology
Robert Parker, Thomas Partridge, Catherine Wormald, Rebeca Kawahara, Victoria Stalls, Maria Aggelakopoulou, Jimmy Parker, Rebecca Powell Doherty, Yoanna Ariosa Morejon, Esther Lee, Kevin Saunders, Barton F. Haynes, Priyamvada Acharya, Morten Thaysen-Andersen, Persephone Borrow, Nicola Ternette
Summary: This study profiles the repertoire of HLA-DR-bound peptides presented by monocyte-derived dendritic cells pulsed with SARS-CoV-2 spike protein. It identifies 209 unique peptide sequences mapping to various sites on the S protein, with substantial trimming of glycan residues observed on the bound peptides. The study also highlights the receptor-binding motif in S1 as a HLA-DR-binding peptide-rich region and identifies potential target peptides in S2 for cross-protective vaccine-elicited responses.
Article
Engineering, Environmental
Zenglu Qi, Ruiping Liu, Tista Prasai Joshi, Jianfeng Peng, Jiuhui Qu
Summary: The electrolysis-assisted nano zerovalent iron (E-nZVI) system demonstrated a high removal efficiency of Se(IV), exceeding the non-assisted nZVI system by 135%. Higher voltages did not significantly increase the reaction rate constant, indicating a complex relationship between parameters in the system.
CHEMICAL ENGINEERING JOURNAL
(2021)
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.
Article
Engineering, Environmental
Aswin Kottapurath Vijay, Vered Marks, Amir Mizrahi, Yinghao Wen, Xingmao Ma, Virender K. Sharma, Dan Meyerstein
Summary: This study investigated the kinetics and mechanisms of the reactions between Feaq II and PMS or PDS at different pH values, as well as the influence of bicarbonate (HCO3-). The results showed that FeaqIV was the dominant oxidizing species in the absence of HCO3-. In the presence of environmentally relevant concentrations of HCO3-, carbonate radical anion (CO3 center dot-) became the dominant reactive species. These findings provide insights for advancing persulfate-based advanced oxidation processes (AOPs) in oxidizing pollutants in natural water.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
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
Materials Science, Multidisciplinary
Virender K. Sharma, Zoltan Homonnay, Tetsuaki Nishida, Jean-Marc Greneche
Summary: Since its discovery in the mid-twentieth century, Fe-57 Mossbauer spectrometry has been widely applied in various scientific fields, offering a local probe technique with high atomic scale sensitivity and low cost facilities. This article introduces the application of Mossbauer spectrometry in studying laboratory-made and natural materials, demonstrating its significant contribution in understanding synthesis mechanisms and chemical/physical properties.
JOURNAL OF MATERIALS RESEARCH
(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)
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)
Article
Geochemistry & Geophysics
Xinze Lu, Geoffrey J. Gilleaudeau, Brian Kendall
Summary: The Late Ordovician mass extinction is the first major extinction event in the Phanerozoic, but the reasons for the decline in global biodiversity before the extinction are not well understood.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)
Article
Geochemistry & Geophysics
Junyao Kang, Daniel D. Gregory, Benjamin Gill, Shiqiang Huang, Changxin Lai, Zhaoshan Chang, Huan Cui, Ivan Belousov, Shuhai Xiao
Summary: Sedimentary pyrite is an important geological archive, but it can be altered by diagenetic and hydrothermal processes. This study successfully trained machine learning algorithms to distinguish pyrite origins using trace element data. The approach was validated and applied to identify the origins of pyrite in two sedimentary successions in South China.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)
