检索结果-南通市图书馆

Journal of Environmental Sciences 2012年第2期24卷 297-302页

作者： Chengzhi Hu huijuan liu Jiuhui Qu State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China.

A polyaluminum containing a high concentration of Al13 polymer and active chlorine（PACC） was successfully synthesized by a new electrochemical reactor using Ti/RuO2-TiO2 *** can potentially be used as a dual-function chemical reagent for water *** obtained results indicated that the formation of Al13 polymer and active chlorine,were the most active components in PACC responsible for coagulation and disinfection *** components were significantly influenced by electrolyte temperature,current density,and stirring *** was observed that high electrolyte temperature favored the formation of *** current density and stirring rate resulted in high current efficiency of chlorine evolution,thus favoring the generation of Al13 and active chlorine in *** the PACC（AlT = 0.5 mol/L,basicity = 2.3） was prepared at the optimum conditions by electrolysis process,the Al13 polymer and active chlorine in product reached above 70% of AlT and 4000 mg/L,*** the pilot scale experiment with raw polyaluminum chloride used as an electrolyte,PACC was successfully prepared and produced a high content of Al13 and active chlorine *** pilot scale experiment demonstrated a potential industrial approach of PACC preparation.

关键词： Al13 polymer coagulation pre-oxidation electrolysis water treatment

Insight into the adsorption of tetracycline onto amino and amino–Fe^(3+) gunctionalized mesoporous silica: Effect of functionalized groups

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2018年第3期30卷 171-178页

作者： Ziyang Zhang Haiyan Li huijuan liu Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control Beijing University of Civil Engineering and Architecture Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

In order to study the influences of functionalized groups onto the adsorption of tetracycline,we prepared a series of amino and amino–Fe^（3＋）complex mesoporous silica adsorbents with diverse content of amino and Fe^（3＋）groups（named N,N-SBA15 and Fe-N,N-SBA15）.The resulting mesoporous silica adsorbents were fully characterized by X-ray powder diffraction（XRD）,Fourier transform infrared spectrometer（FTIR）and N2adsorption/desorption ***,the effects of functionalized groups on the removal of TC were *** results showed that the periodic ordered structure of SBA-15 was maintained after modification of amino/Fe^（3＋）*** functionalized amino groups decreased the adsorption capacity while the coordinated Fe^（3＋）increased the adsorption *** adsorption kinetics of TC fitted pseudo-second-order model well and the equilibrium was achieved *** adsorption isotherms fitted the Langmuir model well and with the Fe^（3＋）content increased from 3.93%to 8.26%,the Q（max）of the adsorbents increased from 102 to 188 mmol/*** solution p H affected the adsorption of TC onto amino complex adsorbents slightly while influenced the adsorption onto Fe-amine complex adsorbents *** adsorption of TC on SBA15 and N,N-SBA15 may be related to the formation of outer-sphere surface complexes,while the adsorption of TC onto Fe-N,N-SBA15 was mainly attributed to the inner-sphere surface *** study could offer potential materials that have excellent adsorption behavior for environmental remediation and suggested useful information for the preparing other adsorbents in environmental applications.

关键词： Adsorption Mesoporous silica Amino groups Fe3+ Tetracycline

Characterization of the Songhua River sediments and evaluation of their adsorption behavior for nitrobenzene

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2008年第7期20卷 796-802页

作者： liu Ruiping liu huijuan Wan Dongjin Yang Min Chinese Acad Sci Ecoenvironm Sci Res Ctr Beijing 100085 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China

The explosion at a plant of the Jilin Petrochemical Corporation on 13 November,2005,and the spill of an estimated 100 t of toxic substances (nitrobenzene as the main component) into the Songhua River received worldwide *** study has focused on the adsorption behavior of nitrobenzene that spilled onto sediments along the Songhua River,which was one of the efforts to evaluate the fate of nitrobenzene after the spillage *** organic carbon contents of these sediments along the Songhua River var...

关键词： nitrobenzene adsorption sediment characteristics organic carbon content particle size distribution

Sustainable water environment and water use： A perspective on water resource utilization

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2016年第12期28卷 1-2页

作者： huijuan liu Dongsheng Wang Baoling Yuan State Key Laboratory of Environmental Aquatic Chemistry Research Center of Eco-Environment Sciences Chinese Academy of Sciences Beijing 100085 China Institute of Municipal and Environmental Engineering College of Civil Engineering Huaqiao University Xiamen 361021 China

The 6th International Water Association Asia Pacific Regional Grouping （IWA-ASPIRE） Conference and Exhibition was held on September 20-24, 2015, in Beijing. The conference was hosted by the Research Center for Eco-Environmental Sciences （RCEES） of Chinese Academy of Sciences （CAS）; with strong support provided by CAS, Chinese Academy of Engineering （CAE）, National Science Foundation of China （NSFC）,

关键词： Sustainable water environment and water use CAS

Inactivation and risk control of pathogenic microorganisms in municipal sludge treatment:A review

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2022年第6期16卷 23-45页

作者： Mengtian Li Ge Song Ruiping liu Xia Huang huijuan liu State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Center for Water and Ecology School of EnvironmentTsinghua UniversityBeijing 100084China School of Environment Tsinghua UniversityBeijing 100084China

The rapid global spread of coronavirus disease 2019(COVID-19)has promoted concern over human pathogens and their significant threats to public health *** monitoring and control of human pathogens in public sanitation and health facilities are of great *** sludge is an inevitable byproduct of sewage that contains human and animal feces in wastewater treatment plants(WWTPs).It is an important sink of different pollutants and pathogens,and the proper treatment and disposal of sludge are important to minimize potential risks to the environment and public ***,there is a lack of comprehensive analysis of the diversity,exposure risks,assessment methods and inactivation techniques of pathogenic microorganisms in *** on this consideration,this review summarizes the control performance of pathogenic microorganisms such as enterovirus,Salmonella spp.,and Escherichia coli by different sludge treatment technologies,including composting,anaerobic digestion,aerobic digestion,and microwave irradiation,and the mechanisms of pathogenic microorganism inactivation in sludge treatment processes are ***,this study reviews the diversity,detection methods,and exposure risks of pathogenic microorganisms in *** review advances the quantitative assessment of pathogenic microorganism risks involved in sludge reuse and is practically valuable to optimize the treatment and disposal of sludge for pathogenic microorganism control.

关键词： Sludge treatment Pathogenic microorganisms Inactivation mechanisms Exposure risks Land application

Removal of pharmaceutical in a biogenic/chemical manganese oxide system driven by manganese-oxidizing bacteria with humic acids as sole carbon source

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2023年第4期126卷 734-741页

作者： Tingming Ye huijuan liu Weixiao Qi Jiuhui Qu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China University of Chinese Academy of Sciences Beijing 100049China

Bioaugmented sand filtration has attracted considerable attention because it can effectively remove contaminants in drinking water without additional chemical reagent *** this study,a synthesized chemical manganese dioxide (MnO_(2)) -coated quartz sand(MnQS) and biogenic manganese oxide (BioMnOx) composite system was proposed to simultaneously remove typical pharmaceutical contaminants and Mn_(2)+.We demonstrated a manganese-oxidizing bacterium,Pseudomonas ***-1,could oxidize Mn_(2)+to generate BioMnOxusing humic acids (HA) as sole carbon *** coaction of MnQS,QJX-1,and the generated BioMnOxin simultaneously removing caffeine and Mn_(2)+in the presence of HA was *** found a synergistic effect between *** and BioMnOxtogether significantly increased the caffeine removal efficiency from 32.8%(MnQS alone) and 21.5%(BioMnOxalone) to 61.2%.Meanwhile,Mn_(2)+leaked from MnQS was rapidly oxidized by QJX-1 to regenerate reactive BioMnOx,which was beneficial for continuous contaminant removal and system *** degradation intermediates of caffeine oxidized by MnQS and BioMnOxwere detected by LC-QTOF-MS analysis,which implied that caffeine was oxidized by a different ***,this work promotes the potential application of bioaugmented sand filtration in pharmaceutical removal in the presence of natural organic matter in drinking water.

关键词： Bioaugmentation MnO_(2)-coated quartz sand Manganese-oxidizing bacteria Humic acid Caffeine

Thrust Characteristics Analysis of Long Primary Double Sided Linear Induction Machine with Plate and Novel Shuttle Secondary Structure

在线全文

学校读者我要写书评

暂无评论

Transactions of Nanjing University of Aeronautics and Astronautics 2019年第5期36卷 693-702页

作者： liu huijuan ZHANG Qian MA Jiefang School of Electrical Engineering Beijing Jiaotong University

The air-gap flux density formula and thrust expression of long primary double sided linear induction machine(DLIM)in the secondary motion reference frame are deduced by using the Maxwell equations ***,by analyzing the factors that affect the thrust ripple in the thrust expression,a shuttle type secondary structure of long primary DLIMs is proposed,and its thrust performances of the machine with different shuttle size combinations are simulated and compared with that of plate secondary long primary *** results show that the new secondary structure can suppress the thrust ripple and improve the stability of system acceleration.

关键词： linear induction machine long primary ripple end effect shuttle secondary

Electrochemical incineration of dimethyl phthalate by anodic oxidation with boron-doped diamond electrode

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2009年第10期21卷 1321-1328页

作者： HOU Yining QU Jiuhui ZHAO Xu liu huijuan State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The anodic oxidation of aqueous solutions containing dimethyl phthalate （DMP） up to 125 mg/L with sodium sulfate （Na2SO4） as supporting electrolyte within the pH range 2.0-10.0 was studied using a one-compartment batch reactor employing a boron-doped diamond （BDD） as anode. Electrolyses were carded out at constant current density （1.5-4.5 mA/cm^2）. Complete mineralization was always achieved owing to the great concentration of hydroxyl radical （-OH） generated at the BDD surface. The effects of pH, apparent current density and initial DMP concentration on the degradation rate of DMP, the specific charge required for its total mineralization and mineralization current efficiency were investigated systematically. The mineralization rate of DMP was found to be pH-independent and to increase with increasing applied current density. Results indicated that this electrochemical process was subjected, at least partially, to the mass transfer of organics onto the BDD surface. Kinetic analysis of the temporal change of DMP concentration during electrolysis determined by High Performance Liquid Chromatography （HPLC） revealed that DMP decay under all tested conditions followed a pseudo first-order reaction. Aromatic intermediates and generated carboxylic acids were identified by Gas Chromatography- Mass Spectrometry （GC-MS） and a general pathway for the electrochemical incineration of DMP on BDD was proposed.

关键词： dimethyl phthalate anodic oxidation boron-doped diamond mineralization

Science and Technology for Combating Global Water Challenges

在线全文

学校读者我要写书评

暂无评论

Engineering 2022年第2期8卷 1-2页

作者： Jiuhui Qu huijuan liu Gang liu School of Environment Tsinghua UniversityBeijing 100084China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Sanitary Engineering Department of Water ManagementFaculty of Civil Engineering and GeosciencesDelft University of TechnologyDelft 2600 GANetherlands

The survival and development of human society highly depends on the water availability. Driven by the growth of population and economy, global water demand has increased more than eightfold since the 1900s. Meanwhile, the commonly deteriorated freshwater quality cause a large proportion of available water resources unsuitable for human uses. This inter-coupled challenge of insufficient water quantity and inadequate water quality has rendered water scarcity a widespread problem in many parts of the world.

关键词： render Combat widespread

Effects of protein properties on ultrafiltration membrane fouling performance in water treatment

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第3期31卷 273-281页

作者： Yanyan Ding Baiwen Ma huijuan liu Jiuhui Qu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Protein-like substances always induce severe ultrafiltration(UF) membrane fouling. To systematically understand the effect of proteins, regenerated cellulose UF membrane(commonly used for protein separation) performance was investigated in the presence of bovine serum albumin(BSA) under various water conditions. Results showed that although trypsin enhanced the membrane flux via proteolysis, catalysis took a long time. Membrane fouling was alleviated at high solution p H and low water temperature owing to the strong electrostatic repulsion force among BSA molecules. Both Na^+ and Ca^(2+)could increase membrane flux. However, Ca^(2+)played a bridging role between adjacent BSA molecules,whereas membrane fouling was alleviated via a hydration repulsion force with Na+. The order of influence on membrane fouling was as follows: Ca^(2+)concentration > Na+concentration > pH > temperature > trypsin concentration. Furthermore, a polyvinylidene fluoride UF membrane experiment showed that Ca^(2+)could reduce the fouling induced by BSA. Thus, the differences in UF membrane performance will have application potential for alleviating UF membrane fouling induced by proteins during water treatment.

关键词： Ultrafiltration membrane Protein properties Influencing factors Membrane performance