Article
Environmental Sciences
Chao Lei, Zidie Zhou, Wenqian Chen, Jituo Xie, Binbin Huang
Summary: In this study, a composite material of PPY supported Pd/Fe bimetallic nanoparticles was prepared and applied for the simultaneous removal of 4-CP and Cr(VI). The material exhibited excellent catalytic performance, which was attributed to the unique properties of PPY as a support, adsorbent, and electron transfer carrier.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Applied
Ericson Escobedo, Jihun Kim, Dasom Oh, Kangwoo Cho, Yoon-Seok Chang
Summary: Commercial Ti-0.15Pd alloy was successfully activated by selective dissolution of Ti using HF treatment for electrochemical dehalogenation of aqueous pollutants. The catalytic cathode surface exhibited a Pd-enriched nano-porous structure, with optimized conditions leading to high dehalogenation efficiency but requiring periodic regeneration to minimize precious metal loss.
Article
Biotechnology & Applied Microbiology
Minggen Cheng, Dongmei Pei, Xiangrong He, Yongchuang Liu, Pingping Zhu, Xin Yan
Summary: This study identified the transcriptional repressor and its cognate effector of a 4CBA hydrolytic dehalogenation operon, extending halogenated benzoyl-CoA as a new member of CoA-derived effector compounds that mediate allosteric regulation of transcriptional regulators.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Chemistry, Applied
Jan Hubacek, Jaromir Lederer, Pavel Kuran, Petr Koutnik, Zahra Gholami, Michal Zbuzek, Miroslav Baciak
Summary: This study explores the possibility of chlorine removal from a model plastic mixture and compares different pyrolysis conditions and sorbents. The results show that using sorbents in situ is not suitable, but combining stepwise pyrolysis and sorbents ex-situ can reach the limit of 10 ppm for refinery introduction. Fe(3)O4 displays the highest efficiency.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Environmental
Danyu Zhang, Yanhong Tang, Huiling Liu, Zhimin Wang, Xiangxiong Liu, Haifang Tang, Hao Zhang, Dayong Wang, Yi Long, Chengbin Liu
Summary: This study developed an efficient electrocatalytic process for the deep dehalogenation and mineralization of halogenated antibiotics. The results show that the synergy between reduction dehalogenation and oxidation degradation can achieve the deep removal of refractory halogenated organic contaminants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Microbiology
James B. Y. H. Behrendorff
Summary: Cytochrome P450 enzymes, known for their ability to insert oxygen into a wide range of substrates, can also perform reductive reactions under hypoxic conditions, contributing to the dehalogenation and denitration of environmental pollutants. This enzyme activity, first discovered in human pharmacology, has been observed in various organisms.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Chemistry, Physical
Tomas Weidlich, Barbora Kamenicka, Ludvik Benes, Veronika Cicmancova, Alena Komersova, Jiri Cermak, Petr Svec
Summary: The catalytic effect of copper in the hydrodehalogenation process of polybrominated phenols has been studied, showing that some copper-based catalysts are reusable and effective at room temperature. The most promising copper-based reduction systems have been successfully tested in the debromination of industrially important brominated flame retardants.
Article
Chemistry, Physical
Zanyun Ying, Han Chen, Zheng He, Yutao Hu, Zhipeng Huang, Jialing Gao, Xinya Wang, Jiexu Ye, Jingkai Zhao, Shihan Zhang, Jianmeng Chen
Summary: Microbial electrolysis cell (MEC), a promising technology for volatile organic compounds (VOCs) abatement, can be significantly improved by adding anthraquinone-2,6-disulfonate (AQDS) and flavin mononucleotide (FMN). The addition of AQDS and FMN promotes the CB removal efficiency in MEC and enhances the dechlorination process. AQDS is a more suitable additive with higher dechlorination efficiency and coulombic efficiency compared to FMN. The improved performance of MEC is attributed to the lower internal resistance and increased activity of dechlorinating bacterium. The electron transfer pathways are affected by the additives, while the degradation mechanism remains unchanged.
JOURNAL OF POWER SOURCES
(2022)
Article
Environmental Sciences
Zanyun Ying, Han Chen, Jialing Gao, Shihan Zhang, Ruijian Peng, Juping You, Jianmeng Chen, Jingkai Zhao
Summary: In this study, the biocathode activity in microbial electrolysis cell was enhanced by regulating external potentials, leading to improved efficiency in gaseous chlorobenzene removal. Electrochemical stimulation enriched dechlorination microorganisms and proposed a new integrated redox pathway for anaerobic degradation of chlorobenzene. Overall, this work provided insights into bioelectrochemical degradation of gaseous chlorobenzene through potential regulation.
Article
Engineering, Environmental
Gong Chen, Yuanpu Cai, Hao Zhang, Dongsen Hong, Shijie Shao, Chensheng Tu, Yuexiang Chen, Feng Wang, Biao Chen, Yuting Bai, Xingyi Wang, Qiguang Dai
Summary: MnO2 nanorods with exposed (110), (100), or (310) facets were modified by Pt and/or Mo, showing enhanced activity and durability, with Pt promoting oxygen vacancies/Mn3+ formation and Mo inhibiting polychlorinated byproducts. The optimized Mo and Pt codecorated MnO2 demonstrated high resistance to harsh conditions and was considered a promising catalyst for practical applications in catalytic oxidation of actual Cl-VOCs emissions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Pengchao Zang, Jun Liu, Xiaoqing Liu, Guojie Zhang, Jianjun Chen, Junhua Li, Yongfa Zhang
Summary: This study focuses on the simultaneous removal of NOx and CB using CeNb3Fe/TiO2 catalysts prepared by the sol-gel method. It was found that the CeNb3Fe0.3/TiO2 catalyst exhibited the best catalytic performance at temperatures between 260-380 degrees C, with excellent NOx conversion and CB oxidation activity. This was attributed to the more favorable ratios of Ce4+ to Ce3+ and plentiful surface-adsorbed oxygen species.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Rongqiang Yin, Jianjun Chen, Jinxing Mi, Haiyan Liu, Tao Yan, Liang Shan, Junyu Lang, Junhua Li
Summary: By modulating interfacial charges, the trade-off between activity and selectivity can be overcome, leading to efficient catalytic reactions, such as selective removal of nitrogen oxides and chlorinated organic compounds.
Article
Chemistry, Physical
Jianzhong Wu, Jia Zhang, Guangren Qian, Tong-Yi Zhang
Summary: This paper proposes a domain knowledge guided machine learning strategy for designing and discovering catalysts for simultaneous catalysis of chlorobenzene and nitrogen oxides. By using symbolic regression and ML regression models, analytic formulas for the acidity and redox ability of catalysts are obtained, and the catalytic performance is verified.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Environmental Sciences
Raja Singh Rawal, Aditri Mehant, Sunil Kumar Suman
Summary: Crude enzymes produced by Pycnoporus sp. were used to degrade 2-chlorophenol, a persistent environmental pollutant. The laccase and manganese peroxidase enzymes were found to be effective in reducing the concentration of 2-chlorophenol and converting it into less toxic forms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Editorial Material
Biochemistry & Molecular Biology
Robert J. J. Hondal
Summary: Commonly cited redox potentials of ergothioneine are incorrect, and the validity of the value -0.06 V is questionable as the same method used to determine ergothioneine's redox potential was used incorrectly for glutathione.
ANTIOXIDANTS & REDOX SIGNALING
(2023)
Article
Spectroscopy
Fatemeh Abyar, Igor Novak
Summary: The computational simulation of the photoelectron spectrum of active form of vitamin B2 was reported in the gas phase. The study determined the relative stability of eight riboflavin conformers and calculated valence ionization energies using high-level methods. The influence of riboflavin's electronic structure on its biological activity was highlighted.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Agricultural Engineering
Ying Xu, Philip G. Kerr, Jan Dolfing, Bruce E. Rittmann, Yonghong Wu
Summary: This study presents an approach for developing periphytic biofilm with AHLs stimulation and La loading to achieve efficient and stable phosphorus recovery from wastewater. The combination of AHLs stimulation and La loading achieved 99.0% P entrapment and a method for separate recovery of P and La from biofilms was developed.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Physical
Igor Novak
Summary: In this study, the electronic structures of porphyrin's structural isomers and corrole tautomers were investigated using the Green's function method (OVGF), a high-level ab initio method. The vertical, valence ionization energies were calculated and gas phase photoelectron spectra were simulated based on these ionization energies. The Franck-Condon analysis of vibronic effects was performed, and the changes between molecular geometries in neutral and ionic ground state were discussed. The relative energies for isomers were calculated using the composite G4MP2 method. The results provide insights into the effects of deviation from planar geometry and changes in ring-ring linkages on the electronic structure. The study also discusses the relationship between the lowest band ionization energy and aromaticity of porphyrins and corroles.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Physical
Igor Novak
Summary: The electronic structures of sumanene and several heterasumanenes were calculated using a high-level ab initio method, and the influence of geometrical deviation and substituents on the electronic structure was discussed. This study provides theoretical insights for the preparation of new functional materials.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Editorial Material
Soil Science
Yonghong Wu, Pengfei Sun, Jan Dolfing, Chengrong Chen
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
(2022)
Article
Chemistry, Physical
Igor Novak
Summary: The electronic structures and valence ionizations of three mesoionic compounds were studied using high-level ab initio methods, and the influence on chemical reactivity and aromaticity was discussed.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Dong Wu, Jue Zhao, Yinglong Su, Mengjie Yang, Jan Dolfing, David W. Graham, Kai Yang, Bing Xie
Summary: This study investigated the presence of antibiotic resistance genes (ARGs) in the Taipu River catchment, a water source for a major drinking water reservoir in Shanghai. The results showed a significant decrease in ARG abundances downstream towards the reservoir, while the assembly of waterborne bacteria was influenced by temperature and dissolved oxygen conditions. The putative resistant pathogens carried mixtures of ARGs with high transmission probability, particularly with the dominant taxa in the microbial assembly.
Article
Engineering, Environmental
Yue Yi, Jan Dolfing, Ge Jin, XiaoYu Fang, WenHao Han, LaiYan Liu, YueQin Tang, Lei Cheng
Summary: In this study, the influence of ammonia on different methanogenic pathways was evaluated by culturing Methanosarcina barkeri with acetate, H2/CO2, and methanol. Aceticlastic methanogenesis was more sensitive to increased ammonia concentrations than hydrogenotrophic and methylotrophic methanogenesis. The results reveal the varying ammonia tolerances of M. barkeri under different methanogenic pathways, providing insights into the role of the thermodynamic potential of methanogenesis in ammonia stress tolerance and shedding light on the mechanism of ammonia inhibition on anaerobic digestion.
Article
Multidisciplinary Sciences
Sichu Wang, Pengfei Sun, Junzhuo Liu, Ying Xu, Jan Dolfing, Yonghong Wu
Summary: Periphytic biofilms (PB) at the soil-water interface contribute significantly to methane emissions from rice paddies, but the mechanisms underlying this process are not well understood. This study evaluated the environmental drivers affecting the distribution of methanogenic and methanotrophic communities in rice fields along an edaphoclimatic gradient. The study found that the composition and relative abundance of these communities at the soil-water interface were weakly driven by spatial distance, soil organic carbon, soil total nitrogen, and pH. The study also identified the role of extracellular polymeric substance released by PB in reducing inter/intra-generic interactions and enhancing resilience to edaphic environment changes.
Article
Agricultural Engineering
Nina Yan, Biao Hu, Zhiyu Zheng, Haiying Lu, Jingwen Chen, Xiaomei Zhang, Xizhi Jiang, Yonghong Wu, Jan Dolfing, Lei Xu
Summary: A method of preparing magnetic, recyclable biochar with minimal pore blockage was developed by loading ultrafine magnetite onto ball milled biochar and then milling it for a second time. The deposited magnetite did not significantly wrap the biochar, resulting in a decreased sorption performance. However, the extra milling step restored the surface functional groups and specific surface areas, leading to a 93.8% recovery adsorption of 84.6 +/- 2.5 mg/L on methylene blue. The recyclability of the material was not affected, and the adsorption was driven by multiple interactions. This twice-milled magnetic biochar is highly efficient for sustainable removal of aqueous contaminants.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Physical
Igor Novak
Summary: The electronic structures and valence ionizations of seven nitrosobenzene derivatives were investigated using advanced ab initio methods. The valence electronic structure was found to depend on the number and position of nitroso substituents. The electronic structures of azodioxide geometric isomers and their monomers were also discussed in relation to photodissociation and dimerization reactions.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Soil Science
Yuanyuan Bao, Jan Dolfing, Ruirui Chen, Zhongpei Li, Xiangui Lin, Youzhi Feng
Summary: Soil fertility affects microbial-driven plant residue decomposition and soil organic carbon formation. The composition and efficiency of bacterial communities are significantly influenced by soil fertility levels. High fertile soils select for fast but inefficient bacteria, while low fertile soils select for slow but efficient ones.
SOIL & TILLAGE RESEARCH
(2023)
Article
Chemistry, Physical
Igor Novak
Summary: In this study, the vertical valence ionization energies of pentalene and its derivatives were calculated using the high-level ab initio coupled-cluster method. The valence electronic structures were found to be influenced by the number, type, and position of substituents. The calculated ionization energies were used to simulate UV photoelectron spectra, and the effects of substituents on ionization energies and electronic structure were analyzed. The antiaromaticity and bis-annulation effects in pentalenes were also discussed.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Review
Microbiology
Maria Westerholm, Magdalena Calusinska, Jan Dolfing
Summary: This review summarizes discoveries in syntrophic propionate degradation research and highlights the importance of understanding the metabolic capabilities and cooperation mechanisms of syntrophic propionate-oxidizing bacteria (SPOB) for biotechnological applications and biogenic methane emissions. The review discusses the gene repertoire, metabolic pathways, and electron transfer mechanisms of SPOB, as well as the environmental conditions governing propionate oxidation in different ecosystems.
FEMS MICROBIOLOGY REVIEWS
(2022)
Article
Multidisciplinary Sciences
Sichu Wang, Pengfei Sun, Guangbin Zhang, Neil Gray, Jan Dolfing, Sofia Esquivel-Elizondo, Josep Penuelas, Yonghong Wu
Summary: This study evaluated the contribution of periphytic biofilm (PB) to CO2 and CH4 emissions from rice paddies and found that PB played a significant role in carbon fluxes. PB fixed CO2 and promoted aerobic CH4 oxidation during its growth phase, while it increased soil organic carbon availability and methanogenic microbial community growth during the decay phase, leading to increased CH4 emissions.