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Novel Composite Membranes Incorporating Quaterniazed Carbon-based Nanoparticles for Efficient Removal of Emerging Contaminants

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Novel Composite Membranes Incorporating Quaterniazed Carbon-...

河南省化学会2020年学术年会

作者： Yongxin Wang Yuefei Song Xifan Li yueke sun Xueshuang Bai School of Environment Henan Key Laboratory for Environmental Pollution Control Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control Ministry of Education Henan Normal University

As pollutant constituents getting complicated and the ever increasing public demand for water quality,some deep/ultra-deep treatment technologies have attracted more attention of researchers to continuously improve wastewater treatment efficiency on the basis of upgrading standards.In this work,two novel positively-charged thin-film nanocomposite (TFN)membranes were successfully prepared by incorporating different quaternized carbon-based nanoparticles (QCBNPs) into PEI aqueous solution (0.5 wt.%) via interfacial polymerization (IP),as illustrated in Fig.1,in order to improve their isoelectric point and hydrophilic properties.Specifically,0.04 g·Land 0.2 g·Lwere identified as the optimal doping content of quaternized graphene oxide (QGO) and quaternized carbon quantum dots (QCQDs) for preparing TFN membranes on the basis of their perm-selectivity orthogonal experimental results.Experiments showed that the doping of hydrophilic quaternized monomers could not only create new fast water transport channels,but also enhance selective separation of both resultant TFN membranes.In terms of those two CBNPs,QCQDs manifested superior permeate flux (25 LMH·bar) and great rejection (all greater than 90%) of four types of pharmaceuticals (PhACs) with molecular weights lower than 300 Da and different ionization (p Ka) and hydrophobicity (log K).In addition,the as-prepared TFN membrane had an outstanding antifouling property when bovine serum albumin was selected as the model foulant.Therefore,this work proposed a viable strategy for fabricating positively charged TFN membrane towards efficient removal of emerging small-sized organic contaminants.

关键词： Nanofiltration Carbon-based nanoparticles Positive charged membrane Enhanced performance

The fabricated PCS/PAN NFMs' permeation and selectivity performance for anionic dyes removal

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The fabricated PCS/PAN NFMs' permeation and selectivity perf...

河南省化学会2018年学术年会

作者： Yuefei Song Tiemei Li Wenbo Qin yueke sun Jing Fan School of Environment Henan Key Laboratory for Environmental Pollution ControlKey Laboratory of Yellow River and Huai River Water Environmental and Pollution ControlMinistry of EducationHenan Normal University

The regulation for preparation of phosphorylated chitosan(PCS)/polyacrylonitrile(PAN) membranes with tunable surface charge and enhanced selectivity of charged anionic dyes in standard conditions was discussed systematically, by manipulating of phosphorus content or substituted degree of phosphate group in the synthetic PCS precursors. Anionic dyes such as Methylene blue, Methyl orange and Alizarine yellow R were used as model solutes for studying the charged organic compounds’ removal performance by the fabricated membranes. Main structure and characteristics, such as molecular weights and maximal absorption wave-lengths(λmax) of these dyes adopted are 319.9, 327.3 and 287.2 g·mol-1;664, 464 and 374 nm, respectively. Investigation of surface charge effect on the NFM1 and NFM4 membranes separating performance for the anionic dyes was carried out. The cross-flow nanofiltration(NF) tests were carried out at a dye concentration of 0.1 g·L-1, pressure of 0.8 MPa, pH of 6.8±0.05, and temperature of 25±0.03 °C. As mentioned above, the membranes fluxes for all dyes are close to each other. Rejections acquired from NFM1 and NFM4 for methyl orange and methylene blue are 52. 6% and 64.2%, 49.5% and 57.2%, while alizarine yellow R are 71.9% and 87.5%, respectively, affirming the vital role of Donnan exclusion in the removal mechanism. As can be seen in Table 1, molecular weights of these adopted dyes are similar, but the polarities or negative charges of the indicative functional groups(-COO-for alizarine yellow R,-SO3-for methyl orange and –C=S+ for methylene blue) show significant difference [1].

关键词： Nanofiltration Membrane performance Dyeing removal Selectivity

Ultrafiltration Membrane Performance in Treatment for Dyeing Effluent from Hairwork Industry on High Filtrate Recovery

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Ultrafiltration Membrane Performance in Treatment for Dyeing...

河南省化学会2018年学术年会

作者： Qihua Hu Tiemei Li Yuefei Song Wenbo Qin yueke sun Huilin Wan Jing Fan School of Environment Henan Key Laboratory for Environmental Pollution ControlKey Laboratory of Yellow River and Huai River Water Environmental and Pollution ControlMinistry of EducationHenan Normal University

High water consumption and large amounts of discharged pollutants are the two critical environmental problems in hairwork industry[1]. Dying effluent, as a primary contributor of the hairwork wastewater, contains a high concentration of color, COD and NH-N. In order to test and verify the feasibility of ultrafiltration(UF) treatment for dying effluent, sedimentation-microfiltration pretreatment and UF treatment experiment was performed. The influence of UF system recovery, which ranges from 50% to 90%, on membrane performance and removal rates of multiple pollutants were investigated to determine an ideal system recovery. The results showed that both UF flux and removal rate declined with the increase of system recovery. UF flux remains a relatively high level until 10.7% of the total decrease occurred when recovery reaches 68%. The removal rates of pollutants peaked at 52% of system recovery, and then significantly declined at 64% of system recovery. UF treatment showed a good removal for colority, UV254 and COD, but an inadequate rejection for electrical conductivity and ammonia nitrogen even at low system recovery. Removal of particle matters had a higher tendency for large particles(>15 um) than small particles(4-15 um), and this tendency became more and more evident with the increase of system recovery(seen in Fig.1). Based on the results, 64% was selected as the optimal system recovery to balance the operating efficiency and pollutant removal of UF treatment.

关键词： Membrane performance Dyeing effluent Water reuse Filtrate recovery

NOD2 protect LPS/D-Gal induced acute hepatic injury via suppressing MAPK signaling pathway and inhibiting apoptosis

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NOD2 protect LPS/D-Gal induced acute hepatic injury via supp...

第十三届全国免疫学学术大会

作者： xiaomin ma Yumin Qiu Lihui Zhu yueke Lin Dapeng Ma Caiyu sun Zhenzhi Qin Xuecheng Shen Lihui Han Department of Immunology Shandong University School of Basic Medical Sciences

Objective: Acute hepatic injury caused by inflammatory liver disease is associated with high mortality.Nucleotide oligomerization domain 2(NOD2), a member of innate immune sensor, is known to play an important role in the inflammatory response.However, whether NOD2 plays a role in acute hepatic injury remained unkown.Methods: In this study, we constructed LPS/D-GalN induced acute liver injury mice model in NOD2 null mice and investigate the role of NOD2 in liver injury.Growth curve and HE staining were used to define the function of NOD2 in acute hepatic injury model.Serum index was detected to reflect the degree of liver injury.Flow cytometry was performed to detect the variation of immune cells.qRT-PCR was used to detect the levels of cytokine and chemokine.TUNEL staining was used to detect apoptosis of hepatocyte.Western blot was performed to detect the altered signaling pathway.Results: NOD2mice showed higher death rate and more severe liver injury compared with wide type mice.The amount of infiltrated macrophages and neutrophils were significantly increased in the liver of NOD2mice.The inflammatory cytokines, including TNFα, IL1β, IL-6, IL8 and chemokines including CXCL2, CXCL5 were also dramatically increased in the liver tissue of NOD2mice.Further investigation showed NOD2mice have much lower hepatic apoptosis and suppressed MAPK signaling pathway compared with the wild type mice, which indicated that NOD2 played a protective role in acute liver injury by suppressing MAPK pathway and inducing apoptosis.Conclusion: NOD2 protected the LPS/D-GalN induced acute hepatic injury via inhibiting apoptosis by suppressing MAPK signaling pathway.

关键词： NOD2 hepatic injury apoptosis MAPK

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准周期的表面等离子体布拉格光栅的理论研究

中国激光 2015年第8期42卷 259-264页

作者：孙原超陈全胜王跃科刘诚江南大学光信息科学与技术系江苏无锡214122

提出了一种基于金属-绝缘体-金属(MIM)波导结构的双频带表面等离子体(SPs)布拉格反射器。周期性地调节绝缘体层的宽度,在MIM波导结构中将会形成准周期的SPs布拉格光栅。根据投影理论,在合适的结构参数下,SPs的透过谱中会产生两个禁带,... 详细信息

提出了一种基于金属-绝缘体-金属(MIM)波导结构的双频带表面等离子体(SPs)布拉格反射器。周期性地调节绝缘体层的宽度,在MIM波导结构中将会形成准周期的SPs布拉格光栅。根据投影理论,在合适的结构参数下,SPs的透过谱中会产生两个禁带,在这两个禁带中SPs的传播是被禁止的。加入适当长度的缺陷层之后,将分别在禁带中产生SPs缺陷模式,其中心波长分别是1310 nm和1550 nm。当改变缺陷层的长度时,由于SPs的法布里-珀罗共振效应,缺陷模式的中心波长会产生周期性的变化。利用电磁仿真软件Comsol进行数值模拟,得到的结果验证了设计方法的正确性。

关键词：光栅布拉格反射器表面等离子体法布里-珀罗

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基于MIM结构等离子体波导定向耦合器

中国激光 2015年第2期42卷 320-326页

作者：王继成蒋亚兰王跃科刘诚唐宝杰孙林江南大学理学院江苏无锡214122

理论设计了带有扇环共振微腔的弯曲金属-介质-金属(MIM)波导结构,利用共振微腔结构控制表面等离子体波在扇环直角顶点处的定向传播。通过有限时域差分(FDTD)法计算带有扇环微腔结构的直波导透射率与波长关系,并计算扇环微腔结构与传播... 详细信息

理论设计了带有扇环共振微腔的弯曲金属-介质-金属(MIM)波导结构,利用共振微腔结构控制表面等离子体波在扇环直角顶点处的定向传播。通过有限时域差分(FDTD)法计算带有扇环微腔结构的直波导透射率与波长关系,并计算扇环微腔结构与传播波导间的间隔对光学性质的影响,发现此微腔波导结构具有较高的透射率,可以在特定波长位置实现滤波效果。基于上述理论设计三路、四路弯曲波导结构,实现表面等离子体波在弯曲波导处的分束、全反射等定向传输特性。该结构具有极强的光束缚效应,在纳米尺度对光进行传输,解决了光信号的反射、传输问题,在光集成、光通讯、光信息处理等方面有较好的应用前景。

关键词：光学器件表面等离子体金属-介质-金属结构光波导光学谐振腔

Arginine methyltransferase PRMT5 negatively regulates cGAS-mediated antiviral immune response

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Arginine methyltransferase PRMT5 negatively regulates cGAS-m...

第十四届全国免疫学学术大会

作者： Dapeng Ma Min Yang Qiushi Wang Caiyu sun Hongbiao Shi Weiqiang Jing Yuxuan Bi Xuecheng Shen Xiaomin Ma Zhenzhi Qin yueke Lin Lihui Zhu Yunxue Zhao Yeping Cheng Lihui Han Shandong Provincial Key Laboratory of Infection and Immunology Department of Immunology School of Basic Medical Sciences Cheeloo College of Medicine Shandong University Shandong University Department of Geriatric Gastroenterology Qilu Hospital Shandong University Department of Urology Qilu Hospital Cheeloo College of Medicine Shandong University Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong University

Cyclic GMP-AMP synthase(cGAS) functions as an essential DNA sensor, which senses the cytoplasmic double-stranded DNA and activates the antiviral response. However, the posttranslational modification of cGAS remains to be fully understood and whether it has arginine methylation modification remains unknown. Here, we identified protein arginine methyltransferase 5(PRMT5) as a direct binding partner of cGAS, and it catalyzed the arginine symmetrical dimethylation of cGAS at the Arg124 residue. Further investigation demonstrated that methylation of cGAS by PRMT5 attenuated cGAS-mediated antiviral immune response by blocking the DNA binding ability of cGAS. Oral administration of PRMT5 inhibitors significantly protected mice from HSV-1 infection and prolonged the survival time of these infected mice. Therefore, our findings revealed an essential regulatory effect of PRMT5 on cGAS-mediated antiviral immune response and provided a promising potential antiviral strategy by modulating PRMT5.

关键词： cGAS PRMT5 arginine methylation antiviral immunity

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直接空冷电站空冷岛风机运行的研究

华北电力技术 2016年第11期 53-57页

作者：杨赵辉贺悦科张建民潘峰丁博孙创创华北电力科学研究院(西安)有限公司陕西西安710065

空冷风机的运行状况对整个空冷凝汽器的散热效果起着决定性的作用,主要原因是空冷系统的风机数量较多,运行工况复杂。基于空冷风机的调频功能,利用CFD模拟风机群的运行规律,分析了单个空冷风机单元和风机群在有风和无风两种环境下的运... 详细信息

空冷风机的运行状况对整个空冷凝汽器的散热效果起着决定性的作用,主要原因是空冷系统的风机数量较多,运行工况复杂。基于空冷风机的调频功能,利用CFD模拟风机群的运行规律,分析了单个空冷风机单元和风机群在有风和无风两种环境下的运行情况,可为空冷电站实现风机单机和局部调控提供一定的理论依据,并为改善凝汽器的换热效果和风机的耗电提供一定的参考。

关键词：空冷风机 CFD模拟变工况运行集群效应

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高温热循环对ADZ复相陶瓷性能的影响

中国陶瓷 2020年第6期56卷 40-44页

作者：孙培松郑开宏王娟杨红旺沈阳工业大学沈阳110870 广东省金属强韧化技术与应用重点实验室广东省材料与加工研究所广州510650 广东越科新材料有限公司梅州514768

以共沉淀法制备了钇稳定氧化锆溶胶,再与Al2O3微粉混合,通过干压成型和常压烧结工艺制备ADZ复相陶瓷。通过检测复相陶瓷的相对密度、硬度、常温抗弯强度和断裂韧性,研究1400℃热循环过程对ADZ复相陶瓷烧结性能、力学性能及微观结构的影... 详细信息

以共沉淀法制备了钇稳定氧化锆溶胶,再与Al2O3微粉混合,通过干压成型和常压烧结工艺制备ADZ复相陶瓷。通过检测复相陶瓷的相对密度、硬度、常温抗弯强度和断裂韧性,研究1400℃热循环过程对ADZ复相陶瓷烧结性能、力学性能及微观结构的影响,并通过SEM方法对热循环后试样的微观结构进行表征。结果表明:随着1400℃热循环过程的增加,ADZ复相陶瓷的硬度、抗弯强度和断裂韧性均有不同程度的升高,最高值分别可达16.07 GPa,921 MPa和8.06 MPa·m1/2,提升幅度分别为3%、39%和10%,相对密度在98%以上。物相分析表明有34%的m-ZrO2向t-ZrO2转变,断口穿晶断裂增多。

关键词：热循环 ADZ复相陶瓷力学性能相变增韧