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Ptfe Enhances In Situ Electro-Generation of H2o2 On Graphite Felt Cathode to Synchronously Degrade Cr(Vi) And Methyl Orange in the Flow-Through System

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SSRN 2024年

作者： Li, Li Zhang, Xinwan Shi, Yaqi Yang, Zhengwu Yin, Di Chen, Peng Zhang, Lehua National Engineering Laboratory for Industrial Wastewater Treatment East China University of Science and Technology Shanghai200237 China Department of Materials Science and Engineering City University of Hong Kong Kowloon999077 Hong Kong School of Biology Food and Environment Hefei University Hefei230601 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China

The co-existence of toxic hexavalent chromium [Cr(VI)] and synthetic organic dyes in dyeing effluents is a prevalent issue, while the simultaneous removal of these co-contaminants remains a great challenge. Electrocatalytic reduction of oxygen to hydrogen peroxide (H2O2) as reductant in the flow-through systems by achieving efficient generation and utilization of active sites is a promising strategy for Cr(VI) reducing detoxification, and electro-generated H2O2 can simultaneously degrade organic contaminants via hydroxyl radicals (•OH). Herein, we demonstrated a microfluidic-based flow-through electro-Fenton-like system with modified graphite felt (GF) electrode by constructing a gas diffusion micro-channel to generate H2O2 in situ and simultaneously degrade Cr(VI) and methyl orange (MO). This synergistic removal system promoted the degradation of Cr(VI) and MO compared to those in individual contaminant systems (Cr(VI) reduction reached 99.9%, while MO removal efficiency reached 99% simultaneously). Simulation study indicated that the increased number of accessible active sites and its induced nanoscale convection in flow-through system accelerated the nanoscale interfacial mass transfer at PTFE-electrode-solution. Moreover, active species monitoring and the quantum chemical calculation were applied to explore the synergistic mechanism and detailed pathway on the degradation of co-existing contaminants. This work demonstrated the feasibility of simultaneously converting heavy metals and organic dyes, holding a great promise to removal multiple contaminants in complex wastewater. © 2024, The Authors. All rights reserved.

关键词： Azo dyes

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Hierarchical Anion Exchange and Reverse Electron Transfer in Ldh/Peroxymonosulfate System for Roxarsone Elimination

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SSRN 2024年

作者： Pei, Wenkai Zheng, Yifan Gao, Jianyu Lei, Juying Liu, Yongdi Zhou, Liang Zhang, Jinlong Wang, Yu National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization 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 Department of Molecular Engineering Graduate School of Engineering Kyoto University Kyoto-Daigaku Katsura Nishikyo-ku Kyoto615-8510 Japan State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Roxarsone (ROX) is the main form of As pollution in the world, and developing effective methods for its elimination is beneficial to human health and ecological environment. Herein, we report glutaraldehyde-crosslinked chitosan encapsulated CoCe-LDH as an outstanding catalyst for the advanced oxidation of ROX and the efficient adsorption of inorganic arsenic. 100% of ROX and more than 98.5% of As(III)/As(V) were eliminated, and over 99.3% of remained inorganic arsenic was oxidized to low toxicity As(V) in the PMS-activation system, and some specific properties of LDH are considered the main reasons. The hierarchical anion exchange has been confirmed to be beneficial for constructing a high concentration PMS inter layer microenvironment. And the unique reverse electron transfer process induced the 100% selective production of singlet oxygen. This work not only develops an advanced ROX removal method, but also provides a new understanding of LDH-based advanced oxidation process. © 2024, The Authors. All rights reserved.

关键词： Chemical activation

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A Binary Dumbbell Visible Light Driven Photocatalyst for Simultaneous Hydrogen Production with the Selective Oxidation of Benzyl Alcohol to Benzaldehyde

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SSRN 2024年

作者： Tayyab, Muhammad Mansoor, Seemal Akmal, Zeeshan Khan, Mazhar Zhou, Liang Lei, Juying Zhang, Jinlong Key Laboratory for Advanced Materials Shanghai Engineering Research Center for Multimedia Environmental Catalysis and Resource Utilization 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 Shanghai200237 China Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University Guangdong Shenzhen518055 China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China

Photocatalytic H2 production with selective oxidation of organic moieties in an aqueous medium is a fascinating research area. However, the rational design of photocatalysts and their photocatalytic performance are still inadequate. In this work, we efficiently synthesized the MoS2 tipped CdS nanowires (NWs) photocatalyst using soft templates via the two-step hydrothermal method for efficient H2 production with selective oxidation of benzyl alcohol (BO) under visible light illumination. The optimized MoS2 tipped CdS NWs (20% MoS2) photocatalyst exhibits the highest photocatalytic H2 production efficiency of 13.55 mmol g-1 h-1 with 99% selective oxidation of BO, which was 42.34 and 2.21 times greater photocatalytic performance than that of pristine CdS NWs and MoS2/CdS NWs, respectively. The directional loading of MoS2 at the tips of CdS NWs (as compared to nondirectional MoS2 at CdS NWs) is the key factor towards superior H2 production with 99% selective oxidation of BO and has an inhibitory effect on the photo corrosion of pristine CdS NWs. Therefore, the amazing enhancement in the photocatalytic performance and selectivity of optimized MoS2 tipped CdS NWs (20% MoS2) photocatalyst is due to the spatial separation of their photoexcited charge carriers through the Schottky junction. Moreover, the unique structure of MoS2 flower at the tip of 1D CdS NWs offers separate active sites for adsorption and surface reactions such as H2 production at the MoS2 flower (confirmed by Pt photo deposition) and subsequently the selective oxidation of BO at the stem of CdS NWs. This rational design of a photocatalyst could be an inspiring work for the further development of efficient photocatalytic system for H2 production with selective oxidation of BO (a strategy of mash two potatoes with one fork). © 2024, The Authors. All rights reserved.

关键词： Precious metals

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Indole-3-Acetic Acid Mediated Removal of Sludge Toxicity by Microalgae: Focus on the Role of Extracellular Polymeric Substances

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SSRN 2023年

作者： Li, Renjie Song, Meijing Yin, Danning Ye, Xiaoyun Yu, Jiayu Chen, Xiurong National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China

The use of indole-3-acid (IAA) as an additive aided in achieving the objectives of reducing sludge extract toxicity, increasing Tetradesmus obliquus biomass yield, and enhancing extracellular polysaccharide production. Proteomics analysis can unveil the microalgae's response mechanism to sludge toxicity stress. With 10-6 M IAA addition, microalgae biomass reached 3.426 ± 0.067 g/L. Sludge extract demonstrated 78.3 ± 3.2% total organic carbon removal and 72.2 ± 2.1% toxicity removal. Extracellular polysaccharides and proteins witnessed 2.08 and 1.76-fold increments, respectively. Proteomic analysis indicated that Tetradesmus obliquus directed carbon sources towards glycogen accumulation and amino acid synthesis, regulating pathways associated with carbon metabolism (glycolysis, TCA cycle, and amino acid metabolism) to adapt to the stressful environment. These findings lay the groundwork for future waste sludge treatment and offer novel insights into microalgae cultivation and extracellular polysaccharide enrichment in sludge. © 2023, The Authors. All rights reserved.

关键词： Toxicity

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The Efficient Capture of Polysaccharides in Tetradesmus Obliquus of Indole-3-Acetic Acid Coupling Sludge Cextraction

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SSRN 2023年

作者： Yu, Jiayu Ding, Biao Li, Renjie Chen, Xiurong Yin, Danning Song, Meijing Ye, Xiaoyun National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China

Polysaccharide is an important biomass of algae. The sludge extract is beneficial to the enrichment of polysaccharide due to the abundance of organic matter, while its organic toxicity has an inhibitory effect on algae. To overcome inhibition and improve polysaccharide enrichment,, Tetradesmus obliquus were cultured with sludge extract with different indole-3-acetic acid (IAA) concentrations. Within 30 days of culture cycle, T. obliquus showed in good condition at the IAA dosage content of 10-6 M, the maximum cell density and dry weight were respectively (106.78 ± 2.20) × 106 cell/mL and 2.941 ± 0.067 g/L while the contents of chlorophyll-a, chlorophyll-b and carotenoid were 1.79, 1.91 and 2.80 times that of blank group, respectively. The highest polysaccharide accumulation was obtained under this culture condition, reaching 533.15 ± 21.11 mg/L on the 30th day, which was 2.49 times of that in blank group. Proteomic showed that the up-regulation of A0A383WLM8 promoted the light capture capacity, A0A383WMJ2 and A0A249RWW6 enhanced the accumulation of NADPH and ATP. The up-regulation of A0A383WMK4 promoted the fixation of carbon dioxide and thus the accumulation of polysaccharide. Above findings provide new insights into the mechanism of sludge toxicity removal of T. obliquus and the enhancement of polysaccharide accumulation effect under different concentrations of IAA. © 2023, The Authors. All rights reserved.

关键词： pH

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Analysis of the Regulatory Mechanism of Exogenous Iaa-Mediated Tryptophan Accumulation and Synthesis of Endogenous Iaa in Chlorococcum Humicola

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SSRN 2023年

作者： Chen, Xiurong Ye, Xiaoyun Yu, Xiao Zhao, Jiamin Song, Meijing Yin, Danning Yu, Jiayu National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental Engineering East China University of Science and Technology Shanghai200237 China

The activated sludge method is widely used for the treatment of phenol-containing wastewater, which gives rise to the problem of toxic residual sludge accumulation. Indole-3-acetic acid (IAA) as a typical phytohormone can promote the removal of toxicity and the accumulation of biomass by microalgae. Proteomics analysis can reveal the mechanism of microalgae response to exogenous IAA. The results showed that the IAA concentration of 5×10-6 mol/L was most beneficial for Chlorococcum humicola to cope with the toxic stress in the sludge extract medium, enhance the antioxidant capacity and promote rubisco enzyme expression, and finally, it accumulated 1.57 times more protein than the control group. Exogenous IAA altered the relative abundance of various amino acids in Chlorococcum humicola cells, and proteomic analyses showed that exogenous IAA stimulated the algal cells to produce more IGP, indole, and serine, and tryptophan synthase (A0A383V983) was significantly up-regulated. IGP and serine were converted to tryptophan under the regulation of tryptophan synthase, and tryptophan served as a precursor for the synthesis of endogenous IAA, which also formed a promotional effect on the growth of Chlorococcum humicola. These findings have important implications for the treatment of toxic residual sludge while enriching for high-value amino acids. © 2023, The Authors. All rights reserved.

关键词： Microalgae

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Simultaneous hydrogen production with the selective oxidation of benzyl alcohol to benzaldehyde by a noble‐metal‐free photocatalyst VC/CdS nanowires

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Chinese Journal of Catalysis 2022年第4期43卷 1165-1175页

作者： Muhammad Tayyab Yujie Liu Shixiong Min Rana Muhammad Irfan Qiaohong Zhu Liang Zhou Juying Lei Jinlong Zhang Key Laboratory for Advanced Materials Shanghai Engineering Research Center for Multi‐media Environmental Catalysis and Resource UtilizationJoint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China National Engineering Laboratory for Industrial Wastewater Treatment East China University of Science and TechnologyShanghai 200237China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China School of Chemistry and Chemical Engineering North Minzu UniversityYinchuan 750021NingxiaChina College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Soochow UniversitySuzhou 215006JiangsuChina

In this work we used CdS NWs(nanowires)with vanadium carbide(VC)attached via facile electrostatic self‐assembly and calcination *** results showed that compared to pristine CdS NWs,the photocatalytic activity of CdS NWs loaded with the particular amount of VC was dramatically *** them,the VC/CS‐15 indicated the highest enhancement for simultaneous production of H2 with selective oxidation of benzyl alcohol(BO)into benzaldehyde(BD).The highest hydrogen evolution rate of 20.5 mmol g^(-1)h^(-1)was obtained with more than 99%selectivity for BD production under visible light(λ˃420 nm)irradiation for 2 h,which was almost 661 times higher than the pristine CdS *** enhancement of photocatalytic activity is due to the VC,which provides a favorable attraction for BO by lowering the zeta potential,along with the active site for hydrogen production,and retard the recombination of electron‐hole pairs by increasing the conductivity of the ***,the apparent quantum efficiency(AQE)of VC/CS‐15 for BD and H_(2)production at monochromatic 420 nm is about 7.5%.At the end of the hydrogen evolution test,the selective oxidation with more than 99%selectivity was *** hopes this work will prove its future significance and move scientific community toward a more economical way for achieving the commercialization of H_(2) by photocatalysis.

关键词： Hydrogen production Selective oxidation Benzaldehyde Noble‐metal‐free Visible light

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On the Ft-Icr Mass Spectrometry Analysis of Dissolved Organic Matter Released by Adsorbent During Coal Chemical Wastewater Treatment

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SSRN 2024年

作者： Wei, Qi Chen, Cai Ma, Hong-Peng Liu, Tao Liu, Bing Wang, Tian-Xiang Zhang, Sen Yang, Dan-Hui Lv, Wen-Jie Wang, Hua-Lin National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery East China University of Science and Technology Shanghai200237 China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai200237 China Key Laboratory of Special Functional and Smart Polymer Materials Ministry of Industry and Information Technology Northwestern Polytechnical University Shaan Xi 710072 China Methanol to Olefins Center Shaanxi Yanchang Petroleum Yan'an Energy Chemical Co. Ltd. Shaan Xi 727500 China

This study analyzed the dissolved organic matter (DOM) released by adsorbent during wastewater treatment. It was found that the adsorption method resulted in an organic removal efficiency of over 97% for coal-to-olefin (CTO) wastewater, with the lowest value of 15.7 mg/L. The Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) detected 4111 DOM in the wastewater, 4052 remaining DOM after first-stage anthracite (ANC) adsorption, and 1013 after second-stage macroporous adsorption resin (MAR). The removal degree of lipids in wastewater was the highest, followed by proteins and lignin. During the adsorption process, the proportion of halogenated compounds (HCs) declined from 59.86% to 38.63% and 21.67%. Additionally, freshly produced 2035 and 311 DOMs were found in the adsorption effluent of ANC and MAR, respectively, with HCs accounting for 34.71% and 67.96%. Upon flowing ultra-pure water through ANC and MAR, the effluent dissolved organic carbon (DOC) ranges were 1.118-3.574 mg/L and 1.014-2.557 mg/L, respectively. There were 159 and 131 kinds of DOM detected, respectively, with HCs content of 59.06% and 45.02%. Comparative experiments revealed the complex components of the wastewater promoting the release of organic matter on the adsorbent surface that further reacted to generate organic matter. However, fewer substances were released by the adsorbent. © 2024, The Authors. All rights reserved.

关键词： Adsorption

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Two Feature Fusion Network Based on Efficient Deep Residual Shrinkage Spatial-Temporal Graph Convolution for Emotion Recognition from Gaits

Two Feature Fusion Network Based on Efficient Deep Residual ...

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Chinese control and Decision Conference, CCDC

作者： Xiaoqing Liu Sen Zhang Wendong Xiao School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing China Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) Beijing China Shunde Graduate School University of Science and Technology Beijing Foshan China Beijing Engineering Research Center of Industrial Spectrum Imaging Beijing China

ISBN: (纸本)9781665478977

Emotion Recognition plays a key role in human social activities. Most current methods choose facial information for emotion recognition. But facial information is easily limited by distance in large scenes. Gait information can break this limitation, but the amount of publicly available data is small. This paper proposes two feature fusion network based on efficient deep residual shrinkage spatial-temporal graph convolution to achieve automatic emotion recognition from gaits in large scenes. Firstly chebyshev polynomial approximation graph convolution is combined with efficient deep residual shrinkage network to obtain efficient deep residual shrinkage spatial-temporal graph convolution network to extract deep features. Then sixteen temporal affective features extracted from gaits are used as input of efficient deep residual shrinkage network to extract new affective features. Finally the deep features is spliced with new affective features to divided emotion into happy,angry,sad and neutral. We performed a ten-flod cross-validation experiment on the E-gait real datasets. The highest recognition accuracy is 0.87, with an average of 0.85. Experimental results show that the proposed model is effective in dealing with emotion recognition promblem from gait in fewer sample situation.

关键词： Emotion recognition Convolution Chebyshev approximation Feature extraction

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Comparative Study of Photocatalytic H2 Production by Nickel Chalcogenides1+x Based Zn3In2S6 Photocatalytic System

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SSRN 2024年

作者： Mansoor, Seemal Hu, Zixu Zheng, Yifan Tayyab, Muhammad Khan, Mazhar Akmal, Zeeshan Zhou, Liang Lei, Juying Zhang, Jinlong Key Laboratory for Advanced Materials Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization 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 & Technology Shanghai200237 China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery 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 Department of Molecular Engineering Graduate School of Engineering Kyoto University Kyoto-Daigaku Katsura Nishikyo-ku Kyoto615-8510 Japan State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University Guangdong Shenzhen518055 China

Exploiting metal chalcogenide-based photocatalysts has fascinated researchers as a source of green hydrogen (H2) energy. Herein, we have designed a novel selenium-enriched NiSe1+x/ZIS (NiSexZ) photocatalytic system via a two-step hydrothermal and facile photo-deposition method. It was fascinating to conclude here that the NiSexZ photocatalytic system showed boosted H2 evolution results in comparison with other sulphur-enriched NiS1+x/ZIS (NiSxZ) and tellurium-enriched NiTe1+x/ZIS (NiTexZ). The optimized NiSe0.5Z composite exhibited a photocatalytic H2 evolution of 3.24 mmol g -1 h -1, a 9.8-fold increase over pure ZIS and it demonstrated an apparent quantum efficiency (AQE) of 2.06% via 420nm filter. Moreover, sulphur (S), selenium (Se), and tellurium (Te) synergistic active sites were exposed to promote H2 evolution reaction in this work. Given the significant advancements and commendable performance exhibited by the Se-Hads across the week bond, it is extremely probable that the NiSe1+x cocatalyst holds immense potential for the development of sophisticated photocatalytic materials. © 2024, The Authors. All rights reserved.

关键词： Nickel compounds

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