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Synergistic promotion of particulate matter reduction and production performance via adjusting electrochemical reactions in the zinc electrolysis industry

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 23-33页

作者： Zizhen Ma Jingkun jiang Lei Duan jianguo Deng Fuyuan Xu Zehui Li linhua jiang Ning Duan School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266520China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of the EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China School of Physics Peking UniversityBeijing 100871China

Heavy particulate matter (PM) pollution and high energy consumption are the bottlenecks of hydrometallurgy, especially in the electrolysis process. Therefore, an urgent need is to explore PM reduction methods with production performance co-benefits. This study presents three PM reduction methods based on controlling operating parameters, i.e., lowering electrolyte temperature, H2SO4 concentration, and current density of the cathode. The optimized conditions were also investigated using the response surface methodology to balance the PM reduction effect and Zn production. The results showed that lowering electrolyte temperature is the most efficient, with an 89.0% reduction in the PM generation flux (GFPM). Reducing H2SO4 concentration led to the minimum side effects on the current efficiency of Zn deposition (CEZn) or power consumption (PC). With the premise of non-deteriorating CEZn and PC, GFPM can be reduced by 86.3% at the optimal condition (electrolyte temperature = 295 K, H2SO4 = 110 g/L, current density = 373 A/m^(2)). In addition, the reduction mechanism was elucidated by comprehensively analyzing bubble characteristics, electrochemical reactions, and surface tension. Results showed that lower electrolyte temperature inhibited the oxygen evolution reaction (OER) and compressed gas volume. Lower H2SO4 concentration inhibited the hydrogen evolution reaction (HER) and reduced electrolyte surface tension. Lower current density inhibited both OER and HER by decreasing the reaction current. The inhibited gas evolutions reduced the microbubbles’ number and size, thereby reducing GFPM. These results may provide energy-efficient PM reduction methods and theoretical hints of exploring cleaner PM reduction approaches for industrial electrolysis.

关键词： Zinc electrolysis Particulate matter Energy consumption Operating parameters Bubble characteristic Electrochemical reaction

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Direct generation of Zn metal using laser-induced ZnS to eradicate carbon emissions from electrolysis Zn production

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 83-95页

作者： Ying Chen Ning Duan linhua jiang Fuyuan Xu Guangbin Zhu Yao Wang Yong Liu Wen Cheng Yanli Xu State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China School of Materials Science and Engineering Anhui University of Science&TechnologyHuainan 232001China

In response to the goal of net-zero emissions proposed by Intergovernmental Panel on Climate Change, Chinese government has pledged that carbon emissions will peak by 2030, and achieve carbon neutrality by 2060. However, the high carbon energy structure of traditional industries has aggravated environmental problems, such as greenhouse effect and air pollution. The goal of carbon neutrality will be difficult to achieve without the development of disruptive theories and technologies. The electrolytic zinc industry requires high-temperature roasting at ~1000 ℃, generating large amounts of greenhouse gases and SO_(2). High concentrations of sulfuric acid (200 g/L) are subsequently used for electrolysis, and each ton of zinc produced generates 50 kg of anode slime with lead content of up to 16%, as well as 0.35 m3 of wastewater containing zinc and lead. To solve these problems, an optical metallurgy method is proposed in this study. The proposed method uses laser-induced photoreduction to decompose ZnS and reduce metal ions to metal. Results indicate that Zn0 and S8 can be detected on the surface of ZnS at a specific wavelength and laser fluence. The generation mechanism of Zn0 is such that laser induces an electronic transition that breaks ionic bond in ZnS, resulting in its decomposition and photoreduction to Zn0 under an inert argon gas atmosphere. This method does not reduce other metals in the mineral since it does not use high-temperature roasting, providing a new way of producing high-purity metal without greenhouse gas emissions and heavy metal pollution caused by traditional zinc electrolysis.

关键词： Laser metallurgy ZnS Photochemical reduction Zinc

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Preparation and Performance of Chitosan/Citric Acid Modified Magnesium Oxychloride Cement

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1326-1334页

作者： SONG Zijian LIU Lang YU Peipei ZHANG Yunsheng LI Xincheng CHU Hongqiang jiang linhua College of Mechanics and Materials Hohai UniversityNanjing 2100China School of Civil Engineering Lanzhou University of TechnologyLanzhou 730050China Yunnan Institute of Building Research Co. LtdKunming 650223China

Citric acid(CA)and chitosan(CS)were employed to modify magnesium oxychloride cement(MOC).Multiscale measurements were implemented to study the properties of the modified MOC pastes.Results show that the addition of CA/CS significantly changes the content of each phase and the microstructure of phase 5.The single addition of CA can effectively increase the compressive strength of MOC after 7 d curing,while CS exerts no obvious effect on the compressive strength.As to the simultaneous addition of CA and CS,the compressive strength of MOC gradually decreases with the increasing content of CS.Interestingly,mixing CA and CS significantly enhances the water resistance of MOC and decreases the degradation rate of MOC in phosphate buffered solution,which can be ascribed to the low specific surface area of the plate-like crystals in the modified MOC and the reduction of pores in the structure.

关键词： magnesium oxychloride cement modifier citric acid chitosan

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Effect of Electrodeposition Methods of Cuprous Oxide on Antibacterial Properties of Concrete

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Journal of Wuhan University of Technology(Materials Science) 2023年第4期38卷 823-833页

作者：徐怡 XU Ning GUO Mingzhi LUO Jie LI Yi 储洪强 ZENG Youxu jiang linhua College of Mechanics and Materials Hohai UniversityNanjing211100China Materials&Structural Engineering Department Nanjing Hydraulic Research InstituteNanjing210024China School of Civil Engineering Shaoxing UniversityShaoxing312000China

Three types of electrodeposition,DC electrodeposition,low-frequency pulsed electrodeposition and high-frequency pulsed electrodeposition,were used to deposit cuprous oxide on the concrete surface to improve the antibacterial properties of concrete.The effects of pulse deposition frequency on the antibacterial property of concrete were studied using sulfate-reducing bacteria(SRB)and Escherichia coli(E.coli)as model bacteria.The bacterial concentration and the antibacterial rate were measured to evaluate the antibacterial performance of concrete.The effects of different deposition methods on the elemental content of copper and the amount of copper ions exuded were studied.XRD and SEM were used to analyze the microstructure of the deposited layers.The experimental results show that the concrete treated by electrodeposition exhibited good antibacterial properties against SRB and E.coli.The antibacterial effect of cuprous oxide deposited on concrete by pulse method was better than that by direct current(DC)method.The antibacterial rate of concrete was positively correlated with the exudation rate of copper ion.As the pulse frequency increased,the deposits content on the surface was increased with an accompanying improvement in the antibacterial property.Besides,the pulsed current had an indiscernible effect on the composition of the sediments,which were all mainly composed of Cu_(2)O,but the morphology of the Cu_(2)O differed greatly.Cubic octahedral cuprous oxide had better antibacterial properties with the highest copper ion leaching rate compared with cubic and spherical cuprous oxide.

关键词： cuprous oxide electrodeposition mode microbial corrosion antibacterial properties

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TRPM2 Mediates Hepatic Ischemia–Reperfusion Injury via Ca^(2+) -Induced Mitochondrial Lipid Peroxidation through Increasing ALOX12 Expression

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Research 2024年第1期2023卷 351-368页

作者： Cheng Zhong Jing Yang Yiyin Zhang Xiaoxiao Fan Yang Fan Ning Hua Duguang Li Shengxi Jin Yirun Li Peng Chen Yongle Chen Xiaobo Cai Yi Zhang linhua jiang Wei Yang Peilin Yu Hui Lin Department of General Surgery Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhouP.R.China Department of Biophysics and Department of Neurology of the Fourth Affiliated Hospital Zhejiang University School of MedicineHangzhou 310000P.R.China Department of Physiology and Pathophysiology and Sino-UK Joint Laboratory of Brain Function and Injury of Henan Province Xinxiang Medical University453003 XinxiangHenanP.R.China School of Biomedical Sciences Faculty of Biological SciencesUniversity of LeedsLS29JT LeedsUK Department of Toxicology and Department of Medical Oncology of Second Affiliated Hospital Zhejiang University School of MedicineHangzhouP.R.China Zhejiang Engineering Research Center of Cognitive Healthcare Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhou 310020P.R.China College of Biomedical Engineering and Instrument Science Zhejiang UniversityHangzhou 310058P.R.China

Hepatic ischemia–reperfusion(IR)injury is a serious clinical problem that complicates liver resection and transplantation.Despite recent advances in understanding of the pathophysiology of hepatic IR injury,effective interventions and therapeutics are still lacking.Here,we examined the role of transient receptor potential melastatin 2(TRPM2),a Ca^(2+)-permeable,non-selective cation channel,in mediating hepatic IR injury.Our data showed that TRPM2 deficiency attenuated IR-induced liver dysfunction,inflammation,and cell death in mice.Moreover,RNA sequencing analysis indicated that TRPM2-induced IR injury occurs via ferroptosis-related pathways.Consistently,as a ferroptosis inducer,(1S,3R)-RSL3 treatment induced mitochondrial dysfunction in hepatocytes and a TRPM2 inhibitor suppressed this.Interestingly,TRPM2-mediated calcium influx caused mitochondrial calcium accumulation via the mitochondrial Ca^(2+)-selective uniporter and increased the expression level of arachidonate 12-lipoxygenase(ALOX12),which results in mitochondrial lipid peroxidation during hepatic IR injury.Furthermore,hepatic IR injury-induced ferroptosis was obviously relieved by a TRPM2 inhibitor or calcium depletion,both in vitro and in vivo.Collectively,these findings demonstrate a crucial role for TRPM2-mediated ferroptosis in hepatic IR injury via increased Ca^(2+)-induced ALOX12 expression,indicating that pharmacological inhibition of TRPM2 may provide an effective therapeutic strategy for hepatic IR injury-related diseases,such as during liver resection and transplantation.

关键词： TRPM2 Lipid Hepatic

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Double-blinded,randomized clinical trial of Gegen Qinlian decoction pinpoints Faecalibacterium as key gut bacteria in alleviating hyperglycemia

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Precision Clinical Medicine 2024年第1期7卷 21-33页

作者： Zezheng Gao Wenhui Zhang Lisha He Han Wang Yufei Li Xiaotian jiang Sha DI Xinmiao Wang Xuan Zhang Lin Han Yanwen Liu Chengjuan Gu Mengyi Wu Xinhui He Lei Cheng Jun Wang Xiaolin Tong linhua Zhao Institute of Metabolic Diseases Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Department of Endocrinology Guang anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Chengdu University of Traditional Chinese Medicine Chengdu 611137China School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 100029China Centre for Evidence-Based Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China Department of Endocrinology Affiliated Hospital of Changchun University of Chinese MedicineChangchun 13000oChina Biologicals Science and Technology Institute Baotou Teacher's CollegeBaotou 014030China Department of Endocrinology Zhengzhou T.C.M.HospitalZhengzhou 450007China Shenzhen Hospital Guangzhou University of Chinese Medicine(Futian)Shenzhen 518000China Department of Cardiology Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510120China Department of Cardiology Yunnan Provincial Hospital of Traditional Chinese MedicineKunming 650000China Key Laboratory of Development and Application of Rural Renewable Energy Biogas Institute of Ministry of Agriculture and Rural AffairsChengdu 610041China

Background:Accumulating evidence suggests that metabolic disorders,including type 2 diabetes mellitus(T2DM),can be treated with traditional Chinese medicine formulas,such as the Gegen Qinlian decoction(GQD).This study elucidates the mechanisms by which gut microbes mediate the anti-diabetic effects of GQD.Methods:We conducted a double-blind randomized clinical trial involving 120 untreated participants with T2DM.During the 12-week intervention,anthropometric measurements and diabetic traits were recorded every 4 weeks.Fecal microbiota and serum metabolites were measured before and after the intervention using 16S rDNA sequencing,liquid chromatography-mass spectrometry,and Bio-Plex panels.Results:Anti-diabetic effects were observed in the GQD group in the human trial.Specifically,glycated hemoglobin,fasting plasma glucose,and two-hour postprandial blood glucose levels were significantly lower in the GQD group than in the placebo group.Additionally,Faecalibacterium was significantly enriched in the GQD group,and the short-chain fatty acid levels were higher and the serum inflammation-associated marker levels were lower in the GQD group compared to the placebo group.Moreover,Faecalibacterium abundance negatively correlated with the levels of serum hemoglobin,fasting plasma glucose,and pro-inflammatory cytokines.Finally,the diabetes-alleviating effect of Faecalibacterium was confirmed by oral administration of Faecalibacterium prausnitzi(DSMZ 17677)in T2DMmousemodel.Conclusions:GQD improved type 2 diabetes primarily by modulating the abundance of Faecalibacterium in the gut microbiota,alleviating metabolic disorders and the inflammatory state.

关键词： double-blinded randomized controlled trial type 2 diabetes mellitus Gegen Qinlian decoction Faecalibacterium metabolic disorders inflammation

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Influence of Anion Types on the Electrodeposition Healing Effect of Concrete Cracks

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Journal of Wuhan University of Technology(Materials Science) 2012年第6期27卷 1154-1159页

作者：储洪强 jiang linhua XU Ning XIOANG Chuansheng College of Mechanics and Materials Hohai UniversityNanjing 210098China Nangjing Hydraulic Reasarch Institute Nanjing 210098China

With the zinc salt and magnesium salt solutions, the influence of anion types on the electrodeposition healing effect of concrete cracks was investigated, four parameters such as rate of weight gain, surface coating, crack closure, and crack filling depth were measured, and the mineral composition and appearance of electrodeposits in the cracks were analyzed. The experimental results demonstrate that the electrodeposition healing effect is the best by adopting ZnSO4 and MgSO4 solutions. The mineral composition of electrodeposits in the cracks does not change with the anion types. The most particles of ZnO crystal appear as fusiform by using zinc salt solutions. If we selected MgSO4 solution, the Mg（OH）2 crystal was porous honeycomb. The electrodeposits present as flake structure while the other magnesium salt solutions were adopted.

关键词： Crack Closure Magnesium Hydroxide Crystal Face Mortar Specimen Zinc Salt

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Evaluation Research on Applicability of Rapid Iodide Migration Test

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Journal of Wuhan University of Technology(Materials Science) 2014年第2期29卷 329-333页

作者：宋子健 jiang linhua CHU Hongqiang XIONG Chuansheng College of Civil and Transportation Hohai University College of Mechanics and Materials Hohai University

The applicability of the rapid iodide migration test was systematically studied. Comparative experimental tests of different test conditions, including several external voltages, test durations, concrete ages and mixing proportions, were carried out to make clear the transport behaviors of iodide under parallel electric fields. Numerical simulations were also done using the finite element method to found the correlation between chloride and iodide transport behaviors. The test and numerical results show that the chloride transport behaviors of RIM and RCM tests have a good correlation under the several conditions used in the present paper. Moreover, the influence of external conditions （external voltages, test durations） on the test results is small. Thus, it can be concluded that the RIM method is available to determine the chloride penetration resistance of the chloride-eroded structural concrete.

关键词： concrete chloride iodide migration RIM

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肠道菌群基于肠—骨髓轴对多发性骨髓瘤影响的研究进展

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中国微生态学杂志 2024年第4期36卷 493-496,F0003页

作者：蒋艳张鸿雁冀林华青海大学高原医学研究中心青海西宁810001 青海省高原医学应用基础重点实验室(青海−犹他高原医学联合重点实验室) 青海大学附属医院南方医科大学第三临床学院(广州市花都区人民医院)

多发性骨髓瘤(multiple myeloma,MM)是血液系统常见的第二恶性肿瘤,其发病机制与细胞遗传学改变、骨髓瘤细胞与骨髓微环境的相互作用密切相关。肠道菌群是肿瘤微环境的重要组成部分,是MM发生和发展中不可忽视的主要因素,可以通过肠-骨... 详细信息

多发性骨髓瘤(multiple myeloma,MM)是血液系统常见的第二恶性肿瘤,其发病机制与细胞遗传学改变、骨髓瘤细胞与骨髓微环境的相互作用密切相关。肠道菌群是肿瘤微环境的重要组成部分,是MM发生和发展中不可忽视的主要因素,可以通过肠-骨髓轴调节肿瘤微环境,影响MM的发生发展及预后转归。因此,肠道菌群可能是临床治疗MM的潜在新靶点。本文综述了基于肠-骨髓轴的MM的研究进展,旨在阐明肠道菌群与MM发生发展的相关机制,进而寻找潜在的药物靶点,为改善MM的临床预后,尤其为复发患者的治疗提供新的思路。

关键词：多发性骨髓瘤肠道菌群骨髓微环境肿瘤微环境肠-骨髓轴

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轨道车辆空调实心密封框的压缩试验及分析

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橡胶工业 2024年第4期71卷 299-304页

作者：毕研亮姜晓天王林华山东朗进科技股份有限公司山东济南271100

对轨道车辆空调实心密封框(简称密封框,采用三元乙丙橡胶作主体材料)进行了压缩试验与分析。结果表明:密封框的压缩率超过50%会发生不可恢复形变,在实际使用过程中需要控制密封框的压缩率,避免过度压缩导致密封框的损坏;25%压缩率下密... 详细信息

对轨道车辆空调实心密封框(简称密封框,采用三元乙丙橡胶作主体材料)进行了压缩试验与分析。结果表明:密封框的压缩率超过50%会发生不可恢复形变,在实际使用过程中需要控制密封框的压缩率,避免过度压缩导致密封框的损坏;25%压缩率下密封框的压缩力与中心线总长度近似呈线性关系;通过任意尺寸、任意压缩量(压缩率小于30%)下压缩力计算公式可提前对密封框的压缩力进行理论计算,有效避免空调装车不合格的问题。

关键词：轨道车辆空调密封框三元乙丙橡胶压缩试验

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