检索结果-南通市图书馆

Comparative studies on fouling of homogeneous anion exchange membranes by different structured organics in electrodialysis

引用

Journal of Environmental Sciences 2019年第3期31卷 218-228页

作者： Zhijuan Zhao Shaoyuan Shi Hongbin Cao Yujiao Li Bart Van der Bruggen Division of Environment Technology and Engineering CAS key Laboratory of Green Process and Engineering Beijing Research Center of Process Pollution Control State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Chemical Engineering KU Leuven Zhengzhou Institute of Emerging Industrial Technology Faculty of Engineering and the Built Environment Tshwane University of Technology

Five negatively charged organic compounds with different structures, sodium methane sulfonate(MS), sodium benzene sulfonate(BS), sodium 6-hydroxynaphthalene-2-sulfonate(NSS), sodium dodecyl sulfate(SDS), and sodium dodecyl benzene sulfonate(SDBS), were used to examine the fouling of an anion exchange membrane(AEM) in electrodialysis(ED),to explore the effect of molecular characteristics on the fouling behavior on the AEM and changes in the surface and electrochemical properties of the AEM. Results indicated that the fouling degree of the AEM by the different organics followed the order:SDBS > SDS > NSS > BS > MS. SDBS and SDS formed a dense fouling layer on the surface of the AEM, which was the main factor in the much more severe membrane fouling, and completely restricted the transmembrane ion migration. The other three organics caused fouling of the AEM by adsorption on the surface and/or accumulation in the interlayer of the AEM, and exhibited almost no influence on the transmembrane ion migration. It was also concluded that the organics with benzene rings caused more severe fouling of the AEM due to the stronger affinity interaction and steric effect between the organics and the AEM compared with organics with aliphatic chains.

关键词： Anion exchange membrane Different structural organics Membrane fouling Property characterization Fouling mechanism analyses

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Current status of applying microwave-associated catalysis for the degradation of organics in aqueous phase – A review

引用

Journal of Environmental Sciences 2019年第7期31卷 119-135页

作者： Chao Xue Yanpeng Mao Wenlong Wang Zhanlong Song Xiqiang Zhao Jing Sun Yanxiang Wang School of Energy and Power Engineering Shandong University School of Material Science & Engineering Shandong University

Interactions between microwaves and certain catalysts can lead to efficient, energy-directed convergence of a relatively dispersed microwave field onto the reactive sites of the catalyst,which produces thermal or discharge effects around the catalyst. These interactions form"high-energy sites"(HeS) that promote energy efficient utilization and enhanced in situ degradation of organic pollutants. This article focuses on the processes occurring between microwaves and absorbing catalysts, and presents a critical review of microwave-absorbing mechanisms. This article also discusses aqueous phase applications of relevant catalysts(ironbased, carbon-based, soft magnetic, rare earth, and other types) and microwaves, special effects caused by the dimensions and structures of catalytic materials, and the optimization and design of relevant reactors for microwave-assisted catalysis of wastewater. The results of this study demonstrate that microwave-assisted catalysis can effectively enhance the degradation rate of organic compounds in an aqueous phase and has potential applications to a variety of engineering fields such as microwave-assisted pyrolysis, pollutant removal,material synthesis, and water treatment.

关键词： Microwaves Catalysts High energy sites organics degradation Aqueous phase

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recent advances in acid-resistant zeolite T membranes for dehydration of organics

引用

Chinese Journal of Chemical Engineering 2019年第6期27卷 1449-1457页

作者： Yiwei Luo Waseem Raza Jianhua Yang Liangqing Li Ying Lu State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China Collaborative Innovation Center of Fine Chemical and Materials Technology School of Chemistry and Chemical EngineeringHuangshan UniversityHuangshan 245041China

Zeolite membranes offer outstanding potentials in separation of many molecular mixtures due to their molecular sieving selectivity and the high thermal and mechanical stability that allow them to operate at harsh conditions.Development of durable and high separation performance membranes with lower fabrication and operation cost are highly demanded for industrial applications. Zeolite T membrane possesses good acid-resistance with excellent hydrophilic properties as compared to NaA zeolite membrane and can be extended to industrial organic dehydrations under an acidic environment. In the present review the research advances in development of zeolite T membranes for the dehydration of organic mixtures in acidic conditions are summarized. Especially the low temperature synthesis, and epitaxial growth of the zeolite membrane with high performance are well addressed, besides emphasis is particularly placed on ensemble synthesis of hollow fiber zeolite T membrane module and its future prospects for industrial separations.

关键词： Dehydration of organics Epitaxial growth Zeolite T membrane Membrane pervaporation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

organics in the solar system

引用

Research in Astronomy and Astrophysics 2019年第4期19卷 1-6页

作者： Sun Kwok Laboratory for Space Research The University of Hong Kong Department of Earth Oceanand Atmospheric SciencesUniversity of British ColumbiaVancouver

Complex organics are now commonly found in meteorites, comets, asteroids, planetary satellites and interplanetary dust particles. The chemical composition and possible origin of these organics are presented. Specifically, we discuss the possible link between Solar System organics and the complex organics synthesized during the late stages of stellar evolution. Implications of extraterrestrial organics on the origin of life on Earth and the possibility of existence of primordial organics on Earth are also discussed.

关键词： meteorites organics stellar evolution origin of life

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ultrahigh Energy Density Li-Organic Primary Batteries

引用

Energy & Environmental Materials 2022年第4期5卷 1010-1011页

作者： Zhaoyang Chen Yan Yao Department of Electrical and Computer Engineering and Texas Center for Superconductivity University of HoustonHoustonTXUSA

This article is to highlight recent work from Prof.Yunhua Xu published in the Proceedings of the National Academy of Sciences 2022,119,e2116775119.Organic electrode materials are promising candidates for battery electrode materials due to the abundant resource,structural diversity,environmental friendliness,and potential low cost.[1]However,most of reported organic materials rely on one-electron redox reaction per active group.

关键词： lithium battery organics primary battery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reclaiming Biologically Pretreated Greywater for Reuse by Photocatalytic Oxidation: Qualitative Study on the Removal of Trace organics

引用

Journal of Water Resource and Protection 2013年第6期5卷 568-584页

作者： Holger Gulyas Carlos F. Liriano Jorge Margrit Reich Ralf Otterpohl Central Laboratory of Analytical Chemistry Hamburg University of Technology Eissendorfer Str. 38 Hamburg Germany Institute of Wastewater Management and Water Protection Hamburg University of Technology Eissendorfer Str. 42 Hamburg Germany

This study was carried out for gathering qualitative information about the potential of photocatalytic oxidation for the removal of trace organics (analysed by gas chromatography coupled to mass spectrometry, GC/MS) from biologically pretreated greywater to make it suitable for high quality reuse applications like groundwater recharge. Additionally, fractions of bulk organics (humic substances, building blocks, and low molecular weight organic acids) were quantified by liquid chromatography with organic carbon detection. Biologically pretreated greywater was subjected to photocatalytic oxidation in open stirred vessel reactors with UV lamps positioned over the reactors. UV doses of 0, 5, and 15 Wh·L-1 and TiO2 P25 photocatalyst concentrations of 1, 5, 10, and 20 g·L-1 were investigated. Photocatalysis experiments with a 15 Wh·L-1 UV dose were also conducted in the presence of 1 g·L-1 powdered activated carbon. Subsequent to mere contact of the photocatalyst to biologically pretreated greywater without UV, GC/MS did not indicate a substantial removal of trace organics, while humic substances were increasingly adsorbed by increasing photocatalyst concentration. A UV dose of 15 Wh·L-1 and TiO2 concentrations > 5 g·L-1 were favorable conditions for photocatalytic oxidation resulting in the removal of most of the trace organics, especially chlorinated phosphate flame retardants. Also humic substances were efficiently removed under these conditions. Photocatalytic oxidation is thus a promising process for advanced greywater treatment prior to groundwater recharge. Addition of powdered activated carbon did not improve trace and bulk organics removal by photocatalysis with a UV dose of 15 Wh·L-1 and with photocatalyst concentrations > 5 g·L-1.

关键词： Flame Retardants Greywater Photocatalytic Oxidation Reuse Trace organics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Landfill leachate treatment in assisted landfill bioreactor

引用

Journal of Environmental Sciences 2006年第1期18卷 176-179页

作者： HE Pin-jing QU Xian SHAO Li-ming LEE Duu-jong State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China Department of Chemical Engineering ＂National＂ Taiwan University No. 1 Sec 4 Roosevelt Road Taipei Taiwan 10617 China

Landfill is the major disposal route of municipal solid waste（MSW） in most Asian countries. Leachate from landfill presents a strong wastewater that needs intensive treatment before discharge. Direct recycling was proposed as an effective alternative for leachate treatment by taking the landfill as a bioreactor. This process was proved not only considerably reducing the pollution potential of leachate, but also enhancing organic degradation in the landfill. However, as this paper shows, although direct leachate recycling was effective in landfilled MSW with low food waste fraction （3.5%, w/w）, it failed in MSW containing 54% food waste, as normally noted in Asian countries. The initial acid stuck would inhibit methanogenesis to build up, hence strong leachate was yielded from landfill to threaten the quality of receiving water body. We demonstrated the feasibility to use an assisted bioreactor landfill, with a well-decomposed refuse layer as ex-situ anaerobic digester to reducing COD loading in leachate. By doing so, the refuse in simulated landfill column （2.3 m high） could be stabilized in 30 weeks while the COD in leachate reduced by 95%（61000 mg/L to 3000 mg/L）. Meanwhile, the biogas production was considerably enhanced, signaling by the much greater amount and much higher methane content in the biogas.

关键词： bioreactor landfill leachate recycling organics enhancement leachate pretreatment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Characteristic of organic aerosol in a remote area of Okinawa Island

引用

Journal of Environmental Sciences 2009年第10期21卷 1371-1377页

作者： LUN Xiaoxiu TAKAMI Akinori MIYOSHI Takao HATAKEYAMA Shiro Beijing Forestry University Beijing 100083 China National Institute for Environmental Studies Tsukuba 305-8506 Japan Tokyo University of Agriculture and Technology Tokyo 183-8538 Japan

A continuous investigation of aerosol pollutants in Cape Hedo, Japan was conducted from October 2005 to August 2006 by Aerodyne aerosol mass spectrometer （AMS）. This article focused on the analysis of long-range transport of organic aerosol from continental origin to the remote island. Based on the transport distance and air mass origin, four main air mass origins were considered, including North China, South China, Japan and Korea. Although the mass concentration and air mass origin were quite different during study period, the mass spectrum and size distribution of organic matter and oxidized organics were similar, which showed uni-modal distribution with modal diameter of around 500 nm. The loss rate of organics was （5.15 ± 0.55） × 10^-6 s^-1 obtained by plotting the concentration against the transport time. Conversion rate of SO2 to sulfate and oxidation rate of organics were （1.07 ± 0.15） × 10^-5 and （1.09 ± 0.52） × 10^-6 s^-1, respectively.

关键词： long-range transport Okinawa organics loss rate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Progress in Fluorene-based Wide-bandgap Steric Semiconductors

引用

Chinese Journal of Polymer Science 2017年第2期35卷 155-170页

作者： Meng-na Yu Chang-jin Ou Bin Liu Dong-qing Lin Yu-yu Liu Wei Xue Zong-qiong Lin Jin-yi Lin Yan Qian Sha-sha Wang Hong-tao Cao Lin-yi Bian 解令海黄维 Center for Molecular Systems and Organic Devices (CMSOD) Key Laboratory for Organic Electronics and Information Displays ＆ Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts ＆ Telecommunications Nanjing 210023 China Key Laboratory of Flexible Electronics (KLOFE) ＆ Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (Nanjing Tech) Nanjing 211816 China

Molecular bulks are favorable for the thermal and morphological stability in organic wide-bandgap semiconducting polymers with potential applications in both information and energy electronics. In this review, we present our progress in the design of fluorene-based bulky semiconductors with a fractal four-element pattern. Firstly, we established one-pot methods to spirofluorenes, especially spiro[fluorene-9,9＇-xanthene] （SFX） serving as the next-generation spiro-based semiconductors. Secondly, we observed the supramolecular forces at the bulky groups and discovered the supramolecular steric hindrance （SSH） effect on polymorphisms, nanocrystals as well as device performance. Thus, a synergistically molecular attractor-repulsor theory （SMART） was proposed for the control of nanocrystal morphology, thin film phase and morphology. Thirdly, the third possible type of defects has been identified to generate green band （g-band） emission in wide- bandgap semiconductors by the introduction of molecular strain design of cyclofluorene. Finally, the first bulky polydiarylfluorene with highly crystalline and β conformation was achieved by an attractor-repulsor design of tadpole-shape monomer, which offered an effective platform to fabricate stable wide-bandgap semiconducting devices. All the discoveries offer the solid basis to break through bottlenecks of organic/polymer wide-bandgap semiconductors by the improvements of overall performances.

关键词： organics Steric effect Attractor-repulsor Molecular defects Wide-bandgap

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Unlocked disinfection by-product formation potential upon exposure of swimming pool water to additional stimulants

引用

Frontiers of Environmental Science & Engineering 2019年第1期13卷 111-118页

作者： Alvyn P.Berg Ting-An Fang Hao L.Tang Environmental Engineering Program Indiana University of PennsylvaniaIndianaPA15705USA

Anthropogenic organics are known to be responsible for the formation of harmful disinfection byproducts (DBPs) in swimming pool water (SPW). The research explored an important scenario of SPW with no additional anthropogenic organic input. With stimulations by residual chlorine or additional chlorine and extended incubation, the formation of DBPs, especially chlorofonn, was significantly induced. Similar observations were found by investigating synthetic SPW made with sweat and urine. The presence of urine led to a massive fbmiation of chloroform, as noted by an approximate 19-fbld increase after 165-day incubation with a shock chlorine dose. The research suggests that consistent residual chlorine and long water retention as two typical features of SPW could unlock the DBP fbnnation potential of anthropogenic organics. Thus, limiting the introduction of anthropogenic organics may not have an immediate effect on reducing DBP levels, because their reactions with chlorine can be slow and long-lasting. Pool management should prioritize on control of urine and improving air ventilation. This work is useful to deepen understandings about DBP formation in SPW and provide implications for pool management and prospective legislation.

关键词： Trihalomethanes Haloacetic acids Chloroform Residual chlorine Anthropogenic organics Swimming pool water

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：