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Efficient toluene degradation using Bacillus subtilis biofilm-supported Mn–Ce/zeolite catalysts

Green Synthesis and Catalysis 2024年

作者： Mohsin, Muhammad Zubair Mohsin, Ali Zaman, Waqas Qamar Zhu, Xiaojuan Zhao, Xihua Abbas, Zain Hussain, Muhammad Hammad Shan, Ali Salim-ur-Rehman Nawaz, Muhammad Asif Omer, Rabia Zhuang, Yingping Guo, Meijin Huang, Jiaofang State Key Laboratory of Bioreactor Engineering East China University of Science and Technology Shanghai 200237 China Institute of Environmental Sciences and Engineering School of Civil and Environmental Engineering National University of Sciences and Technology (NUST) Islamabad 44000 Pakistan College of Life Science Jiangxi Normal University Nanchang 330022 China School of Resources and Environmental Engineering State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai 200237 China College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials Shenzhen University Shenzhen 518055 China Department of Food Science and Technology Riphah International University Faisalabad Campus Faisalabad 44000 Pakistan Institute of Materials Science of Seville (ICMS) University of Seville Seville 41092 Spain

This study investigated a new approach for synthesizing Bacillus subtilis biofilm-supported Mn–Ce/zeolite catalysts for the degradation of gaseous toluene. Four different metal oxide nano-catalysts (ZMn, ZMnCe-10%, ZMnCe-20%, and ZMnCe-30%) were synthesized with varying ratios of manganese (Mn) and cerium (Ce) on zeolite nanoparticles. TEM, SEM, XRD, BET, XPS, and EDX mapping were used to examine these four samples, as well as simple zeolite. Based on these analyses, the catalytic activity of the prepared samples ZMn, ZMnCe-10%, ZMnCe-20%, and ZMnCe-30% for the complete oxidation of toluene and toluene intermediate products were tested with Non-thermal plasma (NTP) technology in a dielectric barrier discharge (DBD) reactor. Among all, ZMnCe-20% showed the highest toluene degradation efficiency (89%) at low concentrations (200 ppm) and humidity (>50%). Later, highly efficient and hydrophobic nano-biocatalysts were prepared by combining B. subtilis biofilm wild-type (WT) and engineered B. subtilis biofilm EPS with ZMnCe-20% catalyst. EPS is the main component found in biofilm matrix and plays a key role in influencing properties such as biofilm stability, electron transfer, surface roughness and hydrophobicity. Compared to WT B. subtilis biofilm, EPS overexpressed B. subtilis biofilm showed stronger growth and development on ZMnCe-20% nanocatalyst. Moreover, the NTP system packed with ZMnCe-20%/biofilm (EPS+) nano-biocatalyst exhibited the highest toluene degradation activity (99%) with (83%) CO₂ selectivity, (up to 50%) reduction in NOx concentration and complete ozone decomposition at (250 ppm) toluene concentrations and increased humidity (>90%). High-energy electrons generated in the NTP system break the C–H and C–C bond between the rings of the toluene molecule, forming several byproducts which are later reacted with active radical species such as O[rad], OH[rad], and O₃ and further converted into final degradation products (CO₂

关键词： CO2 selectivity Engineered Bacillus subtilis biofilm Metal nanoparticles Toluene oxidation Zeolite

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Magnetic Fe/Carbon/Polymer Composite Hydrogels for Efficient Degradation of Antibiotics in Simulated Wastewater

SSRN

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SSRN 2021年

作者： Liu, Da Gu, Wenyi Zhou, Wenqi He, Wenjia Liu, Lizheng Xu, Ying Zhou, Liang Zhang, Jinlong Liu, Yongdi Lei, Juying National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery East China University of Science and Technology 130 Meilong Road Shanghai200237 China Shanghai Geotechnical Engineering Detecting Centre 522 Huanzhen South Road Shanghai200442 China Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization East China University of Science and Technology 130 Meilong Road Shanghai200237 China Key Laboratory for Advanced Materials Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Road Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology 130 Meilong Road Shanghai200237 China

Three kinds of hydrogel materials combining MOF-derived magnetic Fe/porous carbon (MagFePC) with sodium alginate (SA), polyacrylic acid (PAA) and agarose (AG) were prepared by different methods for removal of norfloxacin (NOR) antibiotics in simulated wastewater. After comparison, MagFePC/SA hydrogels synthesized by a titration forming method were found to have the advantages of simple preparation, good toughness, abundant pores and high Fenton activity. MagFePC/SA can effectively activate H2O2 to remove NOR under neutral conditions, and there was almost no leaching of iron ions, causing no secondary pollution to the environment. Mechanism study revealed that ·O2- and 1O2 were the main active species for the degradation of NOR pollutants, and cyclic experiments showed the materials still had good degradation ability after repeated cycles indicating good stability and reusability of the materials. More important, we built a simple automated wastewater treatment unit that can completely degrade a 5 mg/L NOR antibiotic solution at a flow rate of 2 mL/min. Current works showed that MagFePC/SA had the advantages of simple synthesis, outstanding degradability, excellent stability and eco-friendly reaction, which was a wastewater treatment material with good prospect for industrial application. © 2021, The Authors. All rights reserved.

关键词： Antibiotics

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Concentrations of phthalates metabolites in blood and semen and the potential effects on semen concentration and motility among residents of the Pearl River Delta region in China

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Emerging Contaminants 2020年第1期6卷 39-43页

作者： Xiaofei Song Qiongfang Zhuo Shaoyu Tang Tianfa Xie Zhiyuan Chen Zhijun Zang Yanan Zhang Xiaojun Niu Hua Yin Feng Zeng Chang He School of Environment and Energy South China University of TechnologyGuangzhou510006China Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan523808GuangdongChina Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control Guangdong University of Petrochemical TechnologyGuangdongChina School of Chemistry and Chemical Engineering Sun Yat-sen UniversityGuangzhou510275China Third Affiliated Hospital of Sun Yat-sen University Guangzhou510630China Queensland Alliance for Environmental Health Science(QAEHS) The University of QueenslandBrisbaneAustralia Department of Mechanical and Industrial Engineering University of Massachusetts AmherstAmherstMAUSA

Exposure to phthalate acid esters(PAEs)has been found to have adverse effects on reproduction of human and ***,the effects on the semen quality are *** this study,we have collected paired blood and sperm samples from patients(n=103)at a medical clinic in Guangzhou,China,to determine the concentrations of eight phthalate metabolites∑8m-PAEs).The concentration ranges of P8m-PAEs were 2.7-55 and 0.99-17 ng/mL in blood and semen samples,***(median,3.6 ng/mL in blood and 0.55 ng/mL in semen)and MnOP(median,3.4 ng/mL in blood and 0.69 ng/mL in semen)were the predominant analytes in both blood and semen ***,analytes were not correlated in paired blood and *** motility was significantly associated to the concentrations of∑8m-PAEs in semen,but it did not associate to the concentrations of PAEs in ***-linear regression analysis,including concentrations of PAEs in both blood and semen,as well as BMI,occupation,living habits,suggested that exposure to PAEs at current environmental levels had very limited effects on semen quality of population in Guangzhou,China.

关键词： Phthalate metabolites(m-PAEs) Whole blood Semen concentration Semen motility Pearl river delta region

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Adsorption of Reactive Brilliant Red X-3B from Aqueous Solution by Polypyrrole/Calcium Rectorite Composites: Adsorption Behavior and Mechanism

Adsorption of Reactive Brilliant Red X-3B from Aqueous Solut...

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作者： Qihua Guo Yaolei Xu Kun Yong Ran Chen Xiaofeng Wang Jinyi Chen School of Chemistry and Environmental Engineering Wuhan Institute of Technology Hubei Environmental Engineering Technology Research Center for Engineering Pollution Control Key Laboratory of Green Chemical Engineering Process of Ministry of Education

In this study, polypyrrole/calcium rectorite clay composites(PPy/REC composites) were prepared by in-situ polymerization of pyrrole monomer to adsorb reactive brilliant red X-3 B from aqueous solution. The results of XRD showed that the clay flakes exfoliated in the prepared composites. The SEM results showed that PPy had good dispersibility on clay sheets. The adsorption mainly depended on the initial pH value of the solution, and the optimal adsorption of reactive brilliant red X-3 B was achieved when the p H value was 2.0. The removal rate of PPy/REC composite was much higher than that of PPy homopolymer. The adsorption kinetic data of reactive brilliant red X-3 B at three initial concentrations(100, 150 and 200 mg/L) were best fitted by the pseudo-second-order model, indicating that the concentration gradient of the adsorbent was the driving force of the adsorption process. The adsorption isotherm accorded with the Langmuir isotherm model, and the maximum adsorption capacity was 232.56 mg/g at 298 K. The PPy/REC composites could be regenerated and reused for 5 continuous adsorption-desorption cycles without losing the removal efficiency of the original reactive brilliant red X-3 B. XPS, zeta potential and FT-IR results showed that the removal mechanism of reactive brilliant red X-3 B was related to electrostatic interaction and ion exchange.

关键词： Organic pollutants Wastewater treatment Clay-based materials Reactive brilliant red X-3B removal mechanism Pyrrolic nitrogen

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Microbial electrochemistry for bioremediation

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Environmental Science and Ecotechnology 2020年第1期1卷 85-91页

作者： Xiaofei Wang Federico Aulenta Sebastia Puig Abraham Esteve-Nunez Yujie He Yang Mu Korneel Rabaey Center for Microbial Ecology and Technology(CMET) Ghent UniversityCoupure Links 6539000GhentBelgium Centre for Advanced Process Technology for Urban Resource Recovery(CAPTURE) Ghent UniversityBelgium Water Research Institute(IRSA) National Research Council(CNR)Via Salaria Km 2930000015MonterotondoRMItaly LEQUiA.Institute of the Environment University of GironaCampus Montilivi.C/Maria Aurelia Capmany69E-17003GironaCataloniaSpain Department of Analytical Chemistry and Chemical Engineering University of AlcalaCampus UniversitarioCtra.Madrid-Barcelona Km 33.60028871Alcala de HenaresSpain State Key Laboratory of Pollution Control and Resource Reuse(SKL-PCRR) School of the EnvironmentNanjing UniversityXianlin Avenue 163Nanjing210023China Department of Applied Chemistry School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefeiAnhui230026China

Lack of suitable electron donors or acceptors is in many cases the key reason for pollutants to persist in the *** supplementation of electron donors or acceptors is often difficult to control and/or involves chemical additions with limited lifespan,residue formation or other adverse side *** electrochemistry has evolved very fast in the past years–this field relates to the study of electrochemical interactions between microorganisms and solid-state electron donors or *** can be supplied in such so-called bioelectrochemical systems(BESs)at low voltage to provide or extract electrons in a very precise manner.A plethora of metabolisms can be linked to electrical current now,from metals reductions to denitrification and *** this perspective,we provide an overview of the emerging applications of BES and derived technologies towards the bioremediation field and outline how this approach can be game changing.

关键词： electrochemistry precise residue

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Electrochemical synergistic persulfate oxidation process for treatment of salty organic wastewater

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Huagong Jinzhan/chemical Industry and Engineering Progress 2019年第12期38卷 5572-5577页

作者： Chen, Xi Ji, Zhiyong Huang, Zhihui Zhao, Yingying Liu, Jie Yuan, Junsheng National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization School of Chemical Engineering and Technology Hebei University of Technology Tianjin300130 China Engineering Research Center of Seawater Utilization of Ministry of Education School of Chemical Engineering and Technology Hebei University of Technology Tianjin300130 China State Key Laboratory of Petroleum Pollution Control Beijing102206 China Hebei Collaborative Innovation Center of Modern Marine Chemical Technology Tianjin300130 China

In recent years, the discharge of wastewater has increased with the continuous development of coal chemical industry. Wastewater treatment has become a hot and difficult spot for the large emissions, high salt and high COD. Based on the actual ingredients of the salty organic wastewater (TDS content is 25000mg/L) from a plant located in Yili (Sinkiang), 2-methoxyphenol was chosen as a typical organic in coal chemical wastewater. The method of electrochemistry synergistic persulfate oxidation was investigated to degrade 2-methoxyphenol. The influence of voltage, initial concentration of sodium persulfate, electrode distances and initial pH on the degradation ratio of 2-methoxyphenol were discussed. Considering the electronic consumption and oxidant cost, the suitable degradation conditions of 2-methoxyphenol were the voltage of 2V, electrode distance of 3cm, initial sodium persulfate concentration of 5g/L, pH=12 and reaction time of 3h, and the degradation ratio could reach 97.5%. Compared with the single method of electrochemistry or persulfate oxidation, this method has obvious improvement on the degradation of 2-methoxyphenol and shows a synergistic effect. These results could provide a new method on environmental and efficiency wastewater treatment of coal chemical industry in the future. © 2019, chemical Industry Press. All right reserved.

关键词： Electrochemistry

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Advances in energy efficiency for carbon emissions neutrality

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Energy 2025年 328卷

作者： Chew Tin Lee Bohong Wang Jeng Shiun Lim Yee Van Fan Sin Yong Teng Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia 81310 Johor Bahru Johor Malaysia National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology/Zhejiang Key Laboratory of Pollution Control for Port-Petrochemical Industry Zhejiang Ocean University No. 1 Haida South Road Zhoushan 316022 China Environmental Change Institute (ECI) School of Geography and the Environment University of Oxford Oxford OX13QY United Kingdom Sustainable Process Integration Laboratory – SPIL NETME Centre Faculty of Mechanical Engineering Brno University of Technology - VUT Brno Technická 2896/2 616 69 Brno Czech Republic Department of Circular Chemical Engineering Faculty of Science and Engineering Maastricht University Urmonderbaan 22 6162 Geleen the Netherlands

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Advancing aqueous zinc-ion batteries with carbon dots: A comprehensive review

EcoEnergy

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EcoEnergy 2024年

作者： Mingying Chen Junjie Ma Yanhong Feng Quanping Yuan Yinghong Wu Yifan Liu Guangzhi Hu Xijun Liu Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry and Chemical Engineering Guangxi University Nanning China MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials School of Resources Environment and Materials Guangxi University Nanning China National Engineering Research Center of Green Recycling for Strategic Metal Resources Institute of Process Engineering Chinese Academy of Sciences Beijing China Department of Health Sciences and Technology Biomedical and Mobile Health Technology (BMHT) Group ETH Zürich Zürich Switzerland Institute of Advanced Science Facilities Shenzhen Guangdong China Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental Science Yunnan University Kunming China

Recent years have witnessed a surge in research on aqueous zinc-ion batteries (AZIBs) due to their low cost, stability, and exceptional electrochemical performance, among other advantages. However, practical manufacturing and deployment of AZIBs have been hindered by challenges such as low energy density, significant precipitation-related side reactions, slow ion migration, and dendritic growth. Addressing these issues and enhancing the practical application of AZIBs necessitates the development of novel materials. Carbon dots (CDs), with their distinctive structure and superior electrochemical properties, represent an innovative class of carbon-based materials with broad potential applications for optimizing AZIBs' performance. This study offers a comprehensive review of how CDs can address the aforementioned challenges of AZIBs. It begins with an overview of AZIBs composition and mechanism before delving into the classification, preparation techniques, and functionalization strategies of CDs. The review also thoroughly summarizes the sophisticated roles of CDs as modifiers in electrolytes and electrodes, both positive and negative, and briefly discusses their potential application in membranes. Additionally, it provides a summary of current issues and difficulties encountered in utilizing CDs in AZIBs. This review aims to provide insights and guidance for designing and manufacturing the next generation of high-performance AZIBs.

关键词： aqueous zinc-ion batteries carbon dots electrode design electrolyte energy storage

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Gas permeation properties of a metallic ion-cross-linked PIM-1 thin-film composite membrane supported on a UV-cross-linked porous substrate

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Chinese Journal of chemical Engineering 2018年第12期26卷 2477-2486页

作者： Hongyong Zhao Lizhong Feng Xiaoli Ding Xiaoyao Tan Yuzhong Zhang State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes Tianjin Polytechnic UniversityTianjin 300387China School of Environmental and Chemical Engineering Tianjin Polytechnic UniversityTianjin 300387China Institute of Separation Matenal and Process Control School of Material Science and Engmeering Tianjin Polytechnic UniversityTianjin 300387China

Metallic ion-cross-linked polymer of intrinsic microporosity(PIM-1) thin-film composite(TFC) membranes supported on an ultraviolet(UV)-cross-linked porous substrate were fabricated. The UV-cross-linked porous substrate was prepared via polymerization-induced phase separation. The PIM-1 TFC membranes were fabricated via a dip-coating procedure. Metallic ion-cross-linked PIM-1 TFC membranes were fabricated by hydrolyzing the PIM-1 TFC membrane in an alkali solution and then cross-linking it in a multivalent metallic ion solution. The pore size and porous structures were evaluated by low-temperature N_2 adsorption–desorption analysis. The membrane structure was investigated by field-emission scanning electron microscopy. The effects of heat treatment and pore-forming additives on the gas permeance of the UV-cross-linked porous substrate are reported. The effects of different pre-coating treatments on the gas permeance of the metallic ion-cross-linked PIM-1 TFC membrane are also discussed. The metallic ion-crosslinked PIM-1 TFC membrane displayed high CO_2/N_2 selectivity(23) and good CO_2 permeance(1058 GPU).

关键词： Gas separation Polymerization-induced phase separation UV-cross-linked porous substrate Metallic ion-cross-linked PIM-1TFC membrane

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Partial pore blockage and polymer chain rigidification phenomena in PEO/ZIF-8 mixed matrix membranes synthesized by in situ polymerization

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Chinese Journal of chemical Engineering 2018年第3期26卷 501-508页

作者： Xiaoli Ding Xu Li Hongyong Zhao Ran Wang Runqing Zhao Hong Li Yuzhong Zhang State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes Tianjin Polytechnic University Tianjin Key Laboratory of Hollow Fiber Membrane Materials and Processes Tianjin Polytechnic University Institute of Separation Material and Process Control School of Material Science and Engineering Tianjin Polytechnic University School of Environmental and Chemical Engineering Tianjin Polytechnic University

Nanostructured zeolitic imidazolate frameworks(ZIF-8) was incorporated into the mixture of poly(ethylene glycol) methyl ether acrylate(PEGMEA) and pentaerythritol triacrylate(PETA) to synthesize mixed matrix membranes(MMMs) by in situ polymerization for CO_2/CH_4 separation. The solvent-free polymerization between PEGMEA and PETA was induced by UV light with 1-hydroxylcyclohexyl phenyl ketone as initiator. The chemical structural characterization was performed by Fourier transform infrared spectroscopy. The morphology was characterized by scanning electron microscope. The average chain-to-chain distance of the polymer chains in MMMs was investigated by X-ray diffraction. The thermal property was evaluated by differential scanning calorimetry. The CH_4 and CO_2 gas transport properties of MMMs are reported. The relationship between gas permeation–separation performances or physical properties and ZIF-8 loading is also discussed. However, the permeation–separation performance was not improved in Robeson upper bound plot compared with original polymer membrane as predicted. The significant partial pore blockage and polymer rigidification effect around the ZIFs confirmed by the increase in glass temperature and the decrease in the d-spacing, were mainly responsible for the failure in performance improvement, which offset the high diffusion induced by porous ZIF-8.

关键词： Mixed matrix membrane Partial pore blockage Polymer chain rigidification CO2 separation

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