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Treatment of coke plant wastewater by A/O fixed biofilm system

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Science China chemistry 2005年第5期 107-114页

作者： YU Zhaoxiang, QI Rong, & YIN Yanjun department of chemistry, tongji university, shanghai 200092, China

Coke plant wastewater was treated by an anaerobic–aerobic (A/O) biofilm system. A lab-scale experiment, during which semi-soft media were packed in both the anaerobic and the aerobic reactors, was carried out. The influence parameters, such as HRT, C/N ratio, OLR, and the recycling flow rate on the performance of the system, were studied. The results showed that a sufficient carbon source was important to the performance of bio-degradation system. The COD removal rate increased from 64.15% to 83.28% by raising C/N in wastewater from 2.5 (no ex-ternal carbon source) to 5. but the effluent COD concentration was still a little higher than the discharge standard. In order to make it meet the discharge standard, a deep treatment, coagula-tion, was applied, which was proved as an effective method. Then the effluent COD concentra-tion can be brought to lower than 200 mg·L?1. The NH4-N removal rate in this system was sat-isfactory, being higher than 99%. In addition, it was almost not affected by both C/N ratio and coagulation treatment. The results show that the system is feasible to treat coke plant wastewa-ter.

关键词： coke plant wastewater fixed biofilm ammonia nitrogen COD HRT OLR.

A Note on Schwarz-Pick Estimate

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Chinese Annals of Mathematics,Series b 2010年第3期31卷 343-346页

作者： Yang LIU Zhihua CHEN department of Mathematics Zhejiang Normal University Jinhua 321004 Zhejiang China. department of Mathematics Tongji University Shanghai 200092 China

A Schwarz-Pick estimate of higher order derivative for holomorphic functions with positive real part on bn is presented. This improves the earlier work on Schwarz-Pick estimate of higher order derivatives for holomorp... 详细信息

关键词： Schwarz-Pick estimate Holomorphic function Taylor expansion

Study on the dual-frequency oscillations in galactose-bZ system

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Chinese Journal of chemistry 1997年第1期15卷 25-30页

作者： LI, He-Xingdepartment of chemistry, shanghai Normal university,shanghai 200234, China department of chemistry Shanghai Normal University Shanghai 900234 China [*]department of chemistry Shanghai Normal University Shanghai 900234 China

Three types of dual-frequency oscillations in KbrO3-galactose-acetone-MnSO4-H2SO4 have been observed in a batch reactor depending on the initial concentration of H2SO4 or br-. Similar phenomena were also observed when galactose was replaced by other aldosugars such as glucose, arabinose, lactose and maltose. However no dual-frequency oscillation has been found when ketosugar like fructose was used instead of galactose as the substrate. The roles of acidity, bromide ion and acetone in dual-frequency oscillations have been analyzed. The mechanism of dual-frequency oscillations has been discussed.

关键词： galactose dual-frequency oscillations acidity bromide

The Promoting Effect on the Activities ofFe Doped TiO_2 Photocatalysts

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Chemical Research in Chinese Universities 2001年第2期17卷 187-192页

作者： YU Xi-bin, WANG Gui-hua and LI He-xing (department of chemistry, shanghai Normal university, shanghai 200234, P. R. China) shanghai Normal Univ Dept Chem Shanghai 200234 Peoples R China

The particles of titanium-iron (Ti/Fe) complex with different Fe contents were prepared by means of the sol-gel method and used as a photocatalyst. The activity of the catalyst was investi- gated as a function of the Fe content during the liquid-phase oxidation of tetracycline, which showed an enhancement at the low Fe content. The XRD, Raman, XPS, and UV-Vis absorp- tion spectra indicated that the crystalline structure of the Ti/Fe complex particles changed from anatase phase to rutile phase when the Fe content increased. The isolated Fe203, Fe304, FeO species were observed and Fe3+ ions were highly dispersed in the TiO2 matrixes, then Ti-O-Fe species were formed. These species increased the surface defects of the Ti/Fe particles. Also, ac- tive hydroxyl radicals could be generated in the catalytic transformation, which led to the higher activity of the catalyst than bare Ti02 for the degradation of tetracycline.

关键词： Titanium Fe doped photocatalyst Photocatalytic activity Tetracycline

Non-Kahleriallity of Nonuniform Lattices in SO(3, 1)

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Acta Mathematica Sinica,English Series 2002年第4期18卷 801-802页

作者： Yi Hu YANG department of Applied Mathematics. tongji university. shanghai. 200092. China

In this note. we will show that no nonuniform lattice of SO(3, 1) can be the fundamental group of a quasi-compact Khler manifold. Thus, combining with the result in [1]. one gets that a nonuniform lattice in SO(n, 1)(... 详细信息

关键词： nonuniform lattice Kahler manifold fundamental group

Success rate and complications of endoscopic extraction of common bile duct stones over 2 cm in diameter

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Hepatobiliary & Pancreatic Diseases International 2011年第4期10卷 403-407页

作者： Xin-Jian Wan,Zheng-Jie Xu,Feng Zhu and Lei Li department of Gastroenterology,shanghai First People’s Hospital,shanghai Jiaotong university,shanghai 200080,China department of Gastroenterology,Xinhua Hospital,shanghai Jiaotong university Medical School,shanghai 200092,China [a] department of Gastroenterology Shanghai First People's Hospital Shanghai Jiaotong University Shanghai 200080 China [b] department of Gastroenterology Xinhua Hospital Shanghai Jiaotong University Medical School Shanghai 200092 China

bACKGROUND:Clinically,common bile duct (CbD) stones >2 cm are difficult to remove by endoscopic retrograde cholangiopancreatography (ERCP).To evaluate this observation,the rates of successful clearance of CbD stones and complications were compared between ERCP extraction of CbD stones of >2 cm and bD stones at the Endoscopy Center of shanghai First People’s Hospital from May 2004 to May 2008 were *** with CbD stones of >2 cm in diameter were enrolled in the >2 cm *** matched controls with CbD stones of 2 cm group and 144 patients were in the bD *** the overall success rate and the success rate in the first ERCP session were lower in the >2 cm group (77.8% and 58.3%,respectively) than in the 2 cm group was higher than in the biliary infection (18.1%) were higher in the >2 cm group than in the bD stones of >2 cm in diameter was lower but the complication rate was higher than that of stones of <2 cm in diameter.

关键词： endoscopic retrograde cholangiopancreatography common bile duct diseases gallstone

A NEW NUMERICAL METHOD FOR GROUNDWATER FIOW AND SOLUTE TRANSPORT USING VELOCITY FIELD

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Journal of Hydrodynamics 2008年第3期20卷 356-364页

作者： ZHANG Qian-fei LAN Shou-qi WANG Yan-ming XU Yong-fu School of Naval Architecture Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200030China shanghai Municipal Engineering Design Institute Shanghai 200092 China department of Geotechnical Engineering Tongji University Shanghai 200092 China

A new numerical method for groundwater flow analysis was introduced to estimate simultaneously velocity vectors and water pressure head. The method could be employed to handle the vertical flow under variably saturated conditions and for horizontal flow as well. The method allows for better estimation of velocities at the element nodes which can be used as direct input to transport models. The advection-dispersion process was treated by the Eulerian-Lagrangian approach with particle tracking technique using the velocities at FEM nodes. The method was verified with the classical one dimensional model and applied to simulate contaminant transport process through a slurry wall as a barrier to prevent leachate pollution from a sanitary landfill.

关键词： groundwater flow solute transport velocity vectors finite element method Eulerian-Lagrangian approach particletracking technique

A　Highly　Stereoselective　Synthesis　of　2－Carbomethoxy－3－aryl－4－carboethoxy－5－methyl－cis－2，3－dihydrofurans

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Chemical Research in Chinese Universities 1996年第4期12卷 354-359页

作者： DING Wei-yu CHEN Ya-li ZHANG Yi and YAO Yuan(department of chemistry, shanghai university,shanghai,201800) shanghai UNIV SCI & TECHNOL DEPT CHEMSHANGHAI 201800PEOPLES R CHINA

Carbomethoxymethylenetriphenylar reacts with ethyl 2-acetyl-3-arylacrylates to afford 2-carbomethoxy-3-aryl-4-carboethoxy-5-methyl-2, 3-dihydrofuran via Michael addition in high to excellent yields with high stereosel... 详细信息

关键词： s:Arsorane Stereoselective synthesis 2 3-dihydrofuran

LIFE-SPAN OF CLASSICAL SOLUTIONS TO ONE DIMENSIONAL NONLINEAR WAVE EQUATIONS

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Chinese Annals of Mathematics,Series b 1992年第3期13卷 266-279页

作者：李大潜俞新周忆 Institute of Mathematics Fudan UniversityShanghai 200433China. department of Applied Mathematics Tongji UniversityShanghai 200092China.

by means of a simple and direot method,the authors obtain the sharp lower bound ofthe life-span of classioal solutions to the Cauohy problem with small initial data for onedimensional fully nonlinear wave equations ut... 详细信息

关键词： WAVE sharp affine verified 云一岁夕 integer applying desired satisfy