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Variation Characteristics of Water environmental Capacity in Poyang Lake under the Scheduling of Three Gorges Reservoir

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Meteorological and environmental Research 2011年第3期2卷 46-48,52页

作者： OU Ming-liang1,2,ZHOU Wen-bin2,3,HU Chun-hua2,3 1.College of Civil and Environment engineering,East china institute of Technology,Fuzhou 344000,china 2.Key Laboratory of Environment and Resource Utilization in Poyang Lake,Ministry of Education,nanchang 330031,china 3.institute of environmental and chemical engineering,nanchang university,nanchang 330031,china

[Objective] The aim was to study the variation characteristics of water environmental capacity in Poyang Lake under the scheduling of Three Gorges Reservoir.[Method] Choosing chemical oxygen demand (COD),total nitrogen (TN) and total phosphorus (TP) as the control indexes of pollutants in Poyang Lake,the variation characteristics of water environmental capacity in Poyang Lake under the scheduling of Three Gorges Reservoir were analyzed based on the water environment mathematical models of organic compounds and nutrients.[Result] After the operation of Three Gorges Project,high water level in Poyang Lake lasted for a long time in flood season when Three Gorges Reservoir increased discharge volume,while water level went down obviously with the accelerating of recession flow when reservoir decreased discharge volume to store water,so Three Gorges Project had obvious effects on the hydrological regime of Poyang *** 2009,when Three Gorges Reservoir stored water,the water environmental capacity of COD,TN and TP in Poyang Lake in October decreased by 14.0%,15.4% and 15.4% compared with those before operation,while they increased by 3.64%,4.88% and 4.88% in August when reservoir discharged water to prevent flood.[Conclusion] The study could provide scientific foundation for the water pollution control and water environment management of lakes.

关键词： Three Gorges Project Poyang Lake Water environmental capacity china

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Synthesis and electrochemical performance of La-doped Li_3V_(2-x)La_x(PO_4)_3 cathode materials for lithium batteries

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Rare Metals 2011年第2期30卷 115-119页

作者： JIANG Boquan HU Shufen WANG Minwei OUYANG Xiaoping GONG Zhenyu School of environmental and chemical engineering Nanchang University Nanchang 330031 China

La-doped Li3V2-xLax（PO4）3 （ x = 0.01, 0.02, and 0.03） cathode materials for lithium ion batteries were synthesized by the microwave-assisted carbothermal reduction method （MW-CTR）. The structures and properties of the prepared samples were investigated by X-ray diffraction （XRD） and electrochemical measurements. The results showed that all the three Li3V2-xLax（PO4）3 samples had the same monocfinic structures and sharper diffraction peaks of the crystal plane compared with those of the undoped Li3V2（PO4）3. The initial charge/discharge specific capacity, coulomb efficiency, and discharge decay rate of all the three Li3V2-xLax（PO4）3 samples were superior to those of the undoped Li3V2（PO4）3 sample, and the Li3V1.98La0.02（PO4）3 sample exhibited the best features among the three La-doped Li3V2-xLax（PO4）3 samples. Electrochemical impedance spectroscopy （EIS） demonstrated that the Li3V1.98Lao.02（PO4）3 sample had a lower charge transfer resistance and a higher Li ion diffusion coefficient compared with the undoped Li3V2 （PO4）3 sample.

关键词： lithium batteries cathode materials carbothermal reduction microwaves lithium vanadium phosphate lanthanum

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Phosphorus forms and distribution in the sediments of Poyang Lake,china

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International Journal of Sediment Research 2011年第2期26卷 230-238页

作者： XIANG Su-lin and ZHOU Wen-bin 1 Lecturer,Key Lab of Poyang Lake Ecology and Bio-resource Utilization,Ministry of Education,nanchang university,nanchang 330047,china and Department of environmental engineering,East china JiaoTong university,nanchang 330013,china, 2 Prof,Key Lab of Poyang Lake Ecology and Bio-resource Utilization,Ministry of Education,nanchang university,nanchang 330047,china Lecturer Key Lab of Poyang Lake Ecology and Bio-resource Utilization Ministry of Education Nanchang University Nanchang 330047 China and Department of Environmental Engineering East China JiaoTong University Nanchang 330013 China Prof. Key Lab of Poyang Lake Ecology and Bio-resource Utilization Ministry of Education Nanchang University Nanchang 330047 China

The forms and distribution of phosphorus in the sediments of Poyang Lake were studied using chemical extraction methods to understand the potential release and adsorption of *** results showed that phosphorus in the sediments mainly consisted of inorganic phosphorous species, including iron bound phosphorus,calcium bound phosphorus,aluminium bound phosphorus and dissolved phosphorus,as well as organic phosphorous *** spatial distribution of phosphorus species in surface sediments showed a decreasing trend from the outlet to the entrance of Poyang *** content of total phosphorus in the surface sediments ranged from 688.29 to 825.36 mg/kg, and inorganic phosphorous was the major phosphorus *** bound phosphorus was the dominant form of inorganic phosphorous,accounting for greater than 40%of the total phosphorus, while calcium bound phosphorus and aluminium bound phosphorus accounted for more than 20%, and dissolved phosphorus accounted for less than 5%.The content of organic phosphorus in surface sediments was lower,accounting for less than 15%.Total phosphorus was positively correlated with iron bound phosphorus,aluminium bound phosphorus,calcium bound phosphorus and organic phosphorous,while organic phosphorous was positively correlated with iron bound phosphorus and aluminium bound phosphorus,but only weakly related to calcium bound *** all six sites, the contents of total phosphorus and phosphorus forms in the core sediments obviously decreased with depth,while they were significantly enriched in the surface *** total phosphorus and phosphorus forms contents were significantly higher in the upper layers and had a tendency to decrease toward the bottom of the core,regardless of the phosphorus *** addition,the average contents of total phosphorus and various phosphorus forms decreased rapidly with sediment depth from 0-20 cm,and then decreased slightly from 20-30 cm.

关键词： Poyang Lake Phosphorus forms Distribution characteristics Sediment

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Effect of static magnetic field on activity of immobilized α-amylase

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Chinese Science Bulletin 1997年第2期42卷 127-130页

作者： YAN Liushui, ZHU Yuanbao, HE-Shuang’e and CAO Zhixiang1 Department of chemical engineering, nanchang institute of Aeronautical Technology, nanchang 330034, china 2. Department of Chemistry and chemical engineering, Hunan university, Changsha 410082, china Department of chemical engineering Nanchang Institute of Aenwututical Techndogy Nanchang China Department of Chemistry and chemical engineering Hunan University Changsha China

BIOLOGICAL effect of magnetic field is one of the three major subjects of contemporary biomagnetism, and is also the basis of applied biomagnetism. In order to explore magnetic biological effects, the influence of various sorts of magnetic field on many living systems as well as their different constructural levels has been extensively studied. However, only a few studies with in vitro enzyme have been reported, and few researches concerning the influence of magnetic field on immobilized enzyme reactions have been published. This note describes

关键词： static magnetic field immobilized α-amylase enzyme activity oscillatory behaviour.

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ANALYSIS OF WATER QUALITY IN SHALLOW LAKES WITH A TWO-DIMENSIONAL FLOW-SEDIMENT MODEL

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Journal of Hydrodynamics 2007年第4期19卷 501-508页

作者： JI Yong ZhANG Jie YAO ei ZHAO Di-hua nanchang institute of Technology Nanchang 330099 China College of environmental Science and engineering Hohai University Nanjing 210098 China Nanjing Hydraulic Research institute Nanjing 210098 China

The governing equation for sediment pollutions was derived based on the turbulent diffusion of pollutants in shallow lakes. Coupled with shallow water equations, a depth-averaged 2-D flow and water quality model was developed. By means of the conservation law, a proposed differential equation for the change of sediment pollutants was linked to the 2-D equations. Under the framework of the finite volume method, the Osher approximate Riemann solver was employed to solve the equations. An analytical resolution was used to examine the model capabilities. Simulated results matched the exact solutions especially well. As an example, the simulation of CODMn in the Wuli Lake, a part of the Taihu lake, was conducted, which led to reasonable results. This study provides a new approach and a practical tool for the simulation of flow and water quality in shallow lakes.

关键词： sediment falling velocity turbulence flow and water quality model finite volume method approximate Riemann solver shallow water equation advection-dispersion equation

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Theoretical study of ZnO adsorption and bonding on Al_2O_3(0001) surface

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Science china(Physics,Mechanics & Astronomy) 2004年第6期47卷 664-675页

作者： LI Yanrong1,YANG Chun1,2,XUE Weidong1,LI Jinshan3 & LIU Yonghua3 1.institute of Microelectronics and Solid State Electronics,university of Electronic Science and Technol- ogy of china,Chengdu 610054,china 2.institute of Mathematics and Software Science,Sichuan Normal university,Chengdu 610068,china 3.institute of chemical Materials,china Academy of engineering Physics,Mianyang 621000,china institute of Microelectronics and Solid State Electronics University of Electronic Science and Technology of China Chengdu 610054 China institute of Mathematics and Software Science Sichuan Normal University Chengdu 610068 China institute of chemical Materials China Academy of Engineering Physics Mianyang 621000 China

ZnO adsorption on sapphire (0001) surface is theoretically calculated by using a plane wave ultrasoft pseudo-potential method based on ab initio molecular dynamics. The results reveal that the surface relaxation in the first layer Al-O is reduced, even eliminated after the surface adsorption of ZnO, and the chemical bonding energy is 434.3(±38.6) kJ·mol?1. The chemical bond of ZnO (0.185 ± 0.01 nm) has a 30° angle away from the adjacent Al-O bond, and the stable chemical adsorption position of the Zn is deflected from the surface O-hexagonal symmetry with an angle of about 30°. The analysis of the atomic populations, density of state and bonding electronic density before and after the adsorption indicates that the chemical bond formed by the O2 of the ZnO ? and the surface Al3+ has a strong ionic bonding characteristic, while the chemical bond formed by the Zn2+ and the surface O2 has an obvious covalent characteristic, which ? comes mainly from the hybridization of the Zn 4s and the O 2p and partially from that of the Zn 3d and the O 2p.

关键词： α-Al2O3 (0001) ZnO ab initio molecular dynamics chemical adsorption density of states

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Experimental research on catalytic decomposition of nitrogen oxide over La-Ce-Attapulgite catalyst

Experimental research on catalytic decomposition of nitrogen...

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第六届国际稀土开发与应用研讨会

作者： Jianguo ZOU~*,Ping LUO,Yanyan LIU,Hailong PENG (School of environmental and chemical engineering,nanchang university,nanchang 330031,china)

A series of La-Ce-Attapulgite catalysts with different compositions prepared by chemical blending method were tested for the catalytic decomposition of nitrogen oxide in a fixed bed flow *** La-Ce-Attapulgite catalysts showed excellent catalytic activity for the catalytic decomposition of nitrogen *** of catalyst preparing conditions, including the rare earth content,ratio of La/Ce,pH value of the chemical blending, calcination treatment temperature of the catalysts on the catalytic activity of nitrogen oxide decomposition were *** La-Ce-Attapulgite catalyst prepared under the optimal conditions:rare earth content,La:Ce,pH value of the chemical blending and calcination treatment temperature was 2%,1:1,7 and 400℃,respectively,was identified as the most active catalyst for the catalytic decomposition of nitrogen oxide,and the denitration rate could be up to 83.31%under reaction conditions of 400℃,gas space velocity of 5000 h,the flue gas of 0.08%NO and 5.0%O balancing by ***,the characteristics of the La-Ce-Attapulgite catalysts were studied by SEM and XRD.

关键词： rare earth attapulgite calcination treatment catalytic decomposition denitration rate

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Emergy Analysis of Agro-ecosystem in Poyang Lake Area

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Asian Agricultural Research 2011年第8期3卷 23-26,31页

作者： PAN Xing-xia1,2,3, HE Yi-qing1,3 1. School of Economics and Management, nanchang university, nanchang 330031, china 2. School of Mathematics and Information Science, nanchang Hangkong university, nanchang 330063, china 3.Systems engineering Research institute, nanchang university, nanchang 330031, china School of Economics and Management Nanchang University School of Mathematics and Information Science Nanchang Hangkong University Systems engineering Research institute Nanchang University

By using emergy analysis theory and methods, we conduct quantitative analysis on the input and output of emergy, and sustainable development of agro-ecological system in Poyang Lake Area. The results show that compared with the national average, the environmental loading ratio is relatively low in this area; the net emergy yield rate is high; the sustainable development ability is strong. Finally according to the results of emergy analysis, corresponding countermeasures are put forward as follows: develop agriculture based on the existing rich natural resources; increase technological inputs; develop circular agriculture; promote sustainable agricultural development.

关键词： Emergy analysis Agro-ecological system Poyang Lake

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SYNTHESIS AND OPTICAL PROPERTIES OF A NOVEL ORGANIC/INORGANIC HYBRID NONLINEAR OPTICAL POLYMER VIA SOL-GEL PROCESS

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Chinese Journal of Polymer Science 2001年第4期19卷 421-427页

作者： Hong-xia Xi Zhong Li Zhao-xi Liang The institute of chemical engineering South china university Guangzhou 510640 china The institute of Polymer Science, Zhongshan university Guangzhou 510275, china 华南理工大学广东广州中山大学广东广州

A new organic/inorganic hybrid nonlinear optical (NLO) material was developed by the sol-gel process of an alkoxysilane dye with tetraethoxysilane. A NLO moiety based on 4-nitro-4 ' -hydroxy azobenzene was covalently bonded to the triethoxysilane derivative, i.e, gamma -isocyanatopropyl triethoxysilane. The preparation process and properties of the sol-gel derived NLO polymer were studied and characterized by SEM, FTIR,H-1-NMR, UV-Vis, DSC and second harmonic generation (SHG) measurement. The results indicated that the chemical bonding of the chromophores to the inorganic SiO2 networks induces low dipole alignment relaxation and preferable orientational stability. The SHG measurements also showed that the bonded polymer film containing 75 wt% of the akoxysilane dye has a high electro-optic coefficient (r(33)) of 7.1 pm/V at 1.1 mum wavelength, and exhibit good SHG stability, the r(33) values can maintain about 92.7% of its initial value at room temperature for 90 days, and can maintain about 59.3% at 100 degreesC for 300 min.

关键词： sol-gel process nonlinear optical material alkoxysilane dye dipole alignment relaxation chromophore

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Study of a Novel Rotary Cyclone Gas-Solid Separator

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Journal of Thermal Science 2003年第3期12卷 275-278,282页

作者： Zhiguang Ling Xingyong DengResearch institute of Energy and environmental engineering, Shanghai university of engineering Science, 200336, Shanghai, china Research institute of Energy and environmental engineering Shanghai University of Engineering Science Shanghai China

Based on the analytical study of the characteristics of fine particle motion in swirling flow, a new design idea on flow organization and construction aimed at increasing the positive radial flow in the separation chamber of the rotary cyclone separator (PRV type) was proposed. Experimental verification including the test of variation of separation efficiency and pressure loss with the first and secondary flow ratio show that this new type separator has higher and more stable separation efficiency in broad flow ratio range while the pressure loss is far below the conventional rotary cyclone separator and even comparable with that of simple cyclone separator.

关键词： gas-solid separation rotary cyclone separator flows in cyclones

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