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Journal of Environmental Sciences 2018年第7期30卷 192-204页

作者： Xueci Xing Haibo Wang Chun Hu lizhong liu Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China University of Chinese Academy of Sciences Beijing 100049 China

Bacterial community structure and iron corrosion were investigated for simulated drinking water distribution systems（DWDSs） composed of annular reactors incorporating three different treatments： ozone, biologically activated carbon and chlorination（O3-BAC-Cl2）;ozone and chlorination（O3-Cl2）; or chlorination alone（Cl2）. The lowest corrosion rate and iron release, along with more Fe3O4 formation, occurred in DWDSs with O3-BAC-Cl2 compared to those without a BAC filter. It was verified that O3-BAC influenced the bacterial community greatly to promote the relative advantage of nitrate-reducing bacteria（NRB）in DWDSs. Moreover, the advantaged NRB induced active Fe（III） reduction coupled to Fe（II） oxidation, enhancing Fe3O4 formation and inhibiting corrosion. In addition, O3-BAC pretreatment could reduce high-molecular-weight fractions of dissolved organic carbon effectively to promote iron particle aggregation and inhibit further iron release. Our findings indicated that the O3-BAC treatment, besides removing organic pollutants in water, was also a good approach for controlling cast iron corrosion and iron release in DWDSs.

关键词： Bacterial community Nitrate-reducing bacteria（NRB） O3-biological activated carbon（O3-BAC） Drinking water distribution systems （DWDSs） Corrosion inhibition Iron release

Recent Development on Theory and Application of Variable Gauge Rolling, a Review

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Acta Metallurgica Sinica(English Letters) 2014年第3期27卷 483-493页

作者： Xianghua liu Qilin Zhao lizhong liu Research Institute of Science and Technology Northeastern University School of Materials and Metallurgy Northeastern University

Variable gauge rolling （VGR） is a new technology for producing the materials which have the advantage of lightweight due to optimized thickness according to load distribution. The new progresses in the theoretical research and application of VGR are reviewed in this paper. Two basic equations, VGR-f and VGR-s, were deduced. The former is a new differential equation of force equilibrium, and the latter is a new form of formula for the law of mass conservation. Both of them provide a new base for the development of VGR analysis. As the examples of VGR＇s application, tailor rolled blank （TRB） and longitudinal profile （LP） plate are introduced. Now TRBs are only produced in Germany and China, and have been used in the automotive manufacturing to play an important role in lightweight design. LP plates have been used in shipbuilding and bridge construction, and promised a bright prospect in reducing construction weight. In addition, new technologies and applications of VGR emerge constantly. Tailor welded strips and tailor rolled strips with variable thickness across the width can be used for progressive die and roll forming. The 3D profiled blank can be obtained by two-step rolling process. Tailor tubes witli the variable wail thickness are an efficient way to reduce the weight. The blank with tailored thickness and mechanical property is also under development. Above products based on the tailored ideas provide a new materials-warehouse for the designers to select so as to meet the needs of weight reducing and material saving.

关键词： Variable gauge rolling Tailor rolled blank Longitudinal profile plate Material saving Weight reducing

One-year survey of opportunistic premise plumbing pathogens and free-living amoebae in the tap-water of one northern city of China

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Journal of Environmental Sciences 2019年第3期31卷 20-31页

作者： lizhong liu Xueci Xing Chun Hu Haibo Wang Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of Education Institute of Environmental Research at Greater Bay Guangzhou University

In this study, qPCR was used to quantify opportunistic premise plumbing pathogens(OPPPs) and free-living amoebae in 11 tap water samples collected over four seasons from a city in northern China. Results demonstrated that the average numbers of gene copies of Legionella spp. and Mycobacterium spp. were significantly higher than those of Aeromonas spp.(p 0.05). Moderate negative correlations between the chlorine concentration and the gene copy numbers of OPPPs were observed by Spearman analysis(rsranged from -0.311 to -0.710, p < 0.05). However, no significant correlations existed between OPPPs and AOC, BDOC, or turbidity. Moderate positive correlations were observed between the target microorganisms, especially for Acanthamoeba spp., through Spearman analysis(p < 0.05). Based on our studies, it is proposed that disinfectant concentration, season, taps with different-use frequency, OPPP species, and potential microbial correlations should be considered for control of OPPPs in tap water.

关键词： Opportunistic premise plumbing pathogens(OPPPs) Free-living amoebae(FLA) Drinking water distribution systems(DWDS) Tap-water Quantitative PCR(qPCR)

O_3-BAC-Cl_2: A multi-barrier process controlling the regrowth of opportunistic waterborne pathogens in drinking water distribution systems

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Journal of Environmental Sciences 2019年第2期31卷 142-153页

作者： lizhong liu Xueci Xing Chun Hu Haibo Wang Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationInstitute of Environmental Research at Greater BayGuangzhou University

Simulated drinking water distribution system(DWDS) treated with O_3-BAC-Cl_2(ozonebiological activated carbon-chlorine) was constructed to study its effects on the regrowth of five typical opportunistic pathogens(OPs). It was found that O_3-BAC-Cl_2 could significantly reduce the regrowth of target OPs in the effluents of DWDS compared with Cl_2 and O_3-Cl_2 with the same residual chlorine levels. However, the effect of O_3-BAC-Cl_2 on the average numbers of target OPs gene markers in the biofilms of DWDS was not apparent, suggesting that OPs in the biofilms of DWDS were tolerant to the upstream disinfection process. The quantification of target OPs in the BAC-filter column demonstrated that OPs decreased with the increase of depth, which was likely due to the organic nutrient gradient and microbial competition inside the BAC-filter. Increase in the ozone dose could further reduce the OPs at the bottom of the BAC-filter. Spearman correlation analysis demonstrated that some significant correlations existed between target microorganisms, suggesting potential microbial ecological relationships. Overall, our results demonstrated that the BAC-filter may act as a "battlefield"suppressing the OPs through microbial competition. O_3-BAC-Cl_2 could be an effective multibarrier process to suppress the proliferation of OPs in the bulk water of DWDS. However, OPs protected by the biofilms of DWDS should receive further attention because OPs may be detached and released from the biofilms.

关键词： Opportunistic pathogens (OPs) O3-BAC-Cl2 DWDS qPCR

Effect of lipid peroxidation on the allergenicity and functional properties of soybeanβ-conglycinin(7S)and glycinin(11S)

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Food Science and Human Wellness 2023年第3期12卷 895-902页

作者： Liying Ye Liangtao Lv Xiao Lin Kan He Xiaoquan Yang Zhili Wan lizhong liu Haiqian Wu Shaojun Xing Xuli Wu School of Public Health Health Science CenterShenzhen UniversityShenzhen 518060China School of Food Science and Technology South China University of TechnologyGuangzhou 510640China School of Basic Medical Science Health Science CenterShenzhen UniversityShenzhen 518060China

This study aimed to analyze the effect of lipid peroxidation on the allergenicity and functional properties of soybeanβ-conglycinin(7 S)and glycinin(11 S).Oxidation complexes were determined using the lipid peroxidation method.Functional properties were analyzed based on emulsifying and foaming properties.The potential allergenicity was evaluated by in vitro and in vivo methods.The results found that oxidation altered structures of the proteins and resulted in the formation of cross-linked protein polymers.The emulsion and foaming properties of the proteins were improved after oxidation.The IgE-binding capacity of 7 S and11 S reduced after oxidation.KU812 cell assays showed that both histamine and IL-4 release decreased after oxidation treatment.A mouse model showed that oxidation reduced the IgE,IgG,and IgG1 levels,as well as reduced histamine and mMCP-1 release in serum,which might suppress the allergic reaction.In conclusion,the lipid peroxidation treatment likely causes changes to the functional properties of soybean,decreasing the potential allergenicity of 7 S and 11 S.

关键词： β-Conglycinin Glycinin Lipid peroxidation Allergenicity Functional properties

Springback characteristics in U-channel forming of tailor rolled blank

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Acta Metallurgica Sinica(English Letters) 2012年第3期25卷 207-213页

作者： Huawei ZHANG lizhong liu Ping HU Xianghua liu School of Automotive Engineering Faculty of Vehicle Engineering and Mechanics State Key Labora- tory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China Research Institute of Science and Technology Northeastern University Shenyang 110819 China

Residual stress developed during the rolling process of tailor rolled blank （TRB） can affect the springback of finished parts considerably. Springback characteristics of unannealed and annealed TRBs were investigated by means of numerical simulation and experiments taking U-Channel as an example. TRBs were annealed by the annealing process （700 ℃, holding time 10 h）, then stamping and springback processes of unannealed and annealed TRBs were simulated, and corresponding experiments were also carried out. Effects of the transition zone length, the blank thickness, the friction coefficient and the die clearance on the springback of TRB were analyzed. The results demonstrate that the springback of TRB annealed at 700 ~C for 10 h re- duces significantly. For unannealed and annealed U-Channels, the springback of TRB U-Channel is in direct proportion to the die clearance and is in inverse proportion to the transition zone length, the blank thickness and the friction coefficient. Spring- backs of the thinner monolithic （uniform thickness） blank, the thinner side of TRB, the thicker side of TRB and the thicker monolithic blank are sorted in descending order.

关键词： Tailor rolled blank Springback Annealing

Effects of O3/Cl2 disinfection on corrosion and opportunistic pathogens growth in drinking water distribution systems

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Journal of Environmental Sciences 2018年第11期30卷 38-46页

作者： Haibo Wang Chun Hu Suona Zhang lizhong liu Xueci Xing Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085 China Research Institute of Environmental Studies at Greater Bay School of Environmental Sciences and Engineering Guangzhou University Guangzhou 510006 China University of Chinese Academy of Sciences Beijing 100049 China

The effects of O3/Cl2 disinfection on corrosion and the growth of opportunistic pathogens in drinking water distribution systems were studied using annular reactors （ARs）. The corrosion process and most probable number （MPN） analysis indicated that the higher content of iron-oxidizing bacteria and iron-reducing bacteria in biofilms of the AR treated with O3/Cl2 induced higher Fe304 formation in corrosion scales. These corrosion scales became more stable than the ones that formed in the AR treated with Cl2 alone. O3/Cl2 disinfection inhibited corrosion and iron release efficiently by changing the content of corrosion-related bacteria. Moreover, ozone disinfection inactivated or damaged the opportunistic pathogens due to its strong oxidizing properties. The damaged bacteria resulting from initial ozone treatment were inactivated by the subsequent chlorine disinfection. Compared with the AR treated with Cl2 alone, the opportunistic pathogens M. auium and L. pneumophila were not detectable in effluents of the AR treated with O3/Cl2, and decreased to （4.60 ± 0.14） and （3.09 ± 0.12） loglo （gene copies/g corrosion scales） in biofilms, respectively. The amoeba counts were also lower in the AR treated with O3/Cl2. Therefore, O3/Cl2 disinfection can effectively control opportunistic pathogens in effluents and biofilms of an AR used as a model for a drinking water distribution system.

关键词： Ozone Chlorine Corrosion Opportunistic pathogens Drinking water distribution systems

A MOF-to-MOF conversion assisted formation of hierarchical hollow Zn-Co_(1-x)S/C@C composite for efficient potassium-ion storage

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Chinese Journal of Structural Chemistry 2023年第6期42卷 47-54页

作者： Qixin Zhang lizhong liu Lulu Song Chuxin Wu Yi Zhao Lunhui Guan The Straits Institute of Flexible Electronics(SIFE Future Technologies)Fujian Normal UniversityFuzhou350117China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350108China

Hollow structured composite can enhance the structural stability of metal sulfide anode by accommodating its volume variation,while the performance is still hindered by its poor electron/ion conductivity.Herein,we develop a hier-archical hollow structure to achieve superior electrochemical performance,from which a MOF-to-MOF conversion is utilized to generate hollow Zn-Co_(1-x)S/C composite followed with additional carbon coating layer.For potassium storage,as-prepared hollow Zn-Co1.xS/C@C composite displays high capacities of 375 mA h g^(-1)after 100 cycles at 0.2 A g^(-1)and 201 mA h g^(-1)after 500 cycles at 1 A g^(-1).Moreover,it also manifests outstanding rate capability of 200 mA h g^(-1)at 10 A g^(-1),outperforming hollow Co_(1-x)S@C and majority of the reported cobalt-based anodes.With illustration by kinetics analysis and theoretical calculation,both of Zn doping and internal carbon matrix are conductive to promote the charge transportation ability of Co_(1-x)S,thus accounting for the good cycling behavior and excellent rate capacity of hierarchical hollow Zn-Co1.xS/C@C composite.

关键词： MOF conversion Hollow structure Cobalt sulfide Element doping Potassium-ion batteries

Catalytic performance improvement of volatile organic compounds oxidation over MnO_(x) and GdMnO_(3) composite oxides from spent lithium-ion batteries:Effect of acid treatment

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Chinese Journal of Chemical Engineering 2021年第6期34卷 278-288页

作者： Mingming Guo lizhong liu Jia-nan Gu Hongbo Zhang Xin Min Jianxing Liang Jinping Jia Kan Li Tonghua Sun School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Chemistry and Chemical Engineering Nantong UniversityNantong 226019China School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China Shanghai Institute of Pollution Control and Ecology Security Shanghai 200092China Shanghai Engineering Research Center of SolidWaste Treatment and Resource Recovery Shanghai 200240China

In this work,cathode materials of spent lithium-ion ternary batteries are recovered and used as metal precursor to prepare multi-metal oxides MnO_(x)(SY)and GdMnO_(3)(SY)via combustion method and sol-gel method,respectively.Furthermore,a series of MnO_(x)(SY)-n and GdMnO_(3)(SY)-n(n=0.05,0.10,1.00,4.00,n represents the dilute HNO_(3) concentration)catalysts are fabricated by acid treatment of MnO_(x)(SY)and GdMnO_(3)(SY)samples and catalytic activities of oxygenated VOCs oxidation over all the prepared catalysts are investigated.Catalytic evaluation results show that acid-treated MnO_(x)(SY)-0.10 and GdMnO_(3)(SY)-0.05 samples perform the optimum VOCs removal efficiency respectively,which may be attributed to their obvious enhancement of physicochemical properties.In detail,Mn O_(x)(SY)-0.10 and GdMnO_(3)(SY)-0.05 samples exhibit the larger specific surface area,bigger amount of surface high-valence metal ions(Mn^(4+),Co^(3+),Ni^(3+)),more abundant adsorbed oxygen species and better low-temperature reducibility,which can play a crucial role in the significant improvement of VOCs oxidation.In situ DRIFTS results imply that the possible main intermediates are-OCO,-COO and-C-O species produced during VOCs oxidation.Possible by-products are further determined via TD/GC-MS analysis.

关键词： Spent lithium-ions batteries Acid treatment Multi manganese-based oxides and perovskite VOCs oxidation

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铁素体不锈钢表面起皱研究现状

四川冶金 2024年第2期46卷 18-23页

作者：杨蕊赵阳刘立忠陈礼清东北大学材料科学与工程学院辽宁沈阳110189 东北大学辽宁省轻量化用关键金属结构材料重点实验室辽宁沈阳110189 东北大学轧制技术及连轧自动化国家重点实验室辽宁沈阳110819

表面起皱是铁素体不锈钢在成形过程中最容易出现的一种缺陷。本文首先介绍了铁素体不锈钢表面起皱现象及危害;接着阐述了表面起皱机理的研究进展,指出//ND取向晶粒簇的存在或//ND不利取向织构体积分数较高是造成表面起皱的主要原因;基... 详细信息

表面起皱是铁素体不锈钢在成形过程中最容易出现的一种缺陷。本文首先介绍了铁素体不锈钢表面起皱现象及危害;接着阐述了表面起皱机理的研究进展,指出//ND取向晶粒簇的存在或//ND不利取向织构体积分数较高是造成表面起皱的主要原因;基于表面起皱的机理,介绍了减轻铁素体不锈钢表面起皱的措施,如优化化学成分、控制热轧工艺、冷轧工艺和退火工艺等;最后对铁素体不锈钢表面起皱研究的发展趋势进行了展望。

关键词：铁素体不锈钢表面起皱织构晶粒簇预防措施