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Petro-chemical wastewater treatment by biological process

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Journal of Environmental Sciences 2000年第2期12卷 95-99页

作者： Guan, Wei-sheng Lei, Zi-Xue Zhu, jun-huang Inst. of Environmental Engineering Xi'an Highway University Xi'an 710064 China

In order to study the feasibility of treating petro chemical wastewater by the combination of anaerobic and aerobic biological process, a research of treating wastewater in UASB reactor and aeration basin has been conducted. The test results shows that under moderate temperature, with 5\^2 kgCOD/(m\+3·d) volumetric load of COD Cr in the UASB reactor and 24h of HRT, 85% removal rate of BOD 5 and 83% of COD \{Cr\} and 1\^34 m\+3/(m\+3·d) volumetric gas production rate can be obtained respectively. The aerobic bio degradability can be increased by 20%—30% after the petro chemical wastewater has been treated by anaerobic process. As Ns=0\^45 kgCOD/(kgMLSS·d), HRT=4h in the aeration tank, 94% removal rate of BOD 5, 93% of COD \{Cr\}, 98\^8% total removal rate of COD \{Cr\} and 99% removal rate of BOD 5 can be reached.

关键词： anaerobic aerobic process petro chemical wastewater wastewater treatment CLC number: X703 Document code: A

Enhanced performances of polypropylene membranes by molecular layer deposition of polyimide

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Chinese Journal of Chemical Engineering 2016年第7期24卷 843-849页

作者： Sen Xiong Ting sheng Liang Kong Zhaoxiang Zhong jun huang Yong Wang State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University

Molecular layer deposition （MLD） for the deposition of polyimide （PI） at low temperature of 110 ℃ has been firstly introduced into the field of membrane separation. With the optimized MLD deposition parameters, such low de- position temperature has successfully expanded the application of MLD for the surface modification of polymeric materials. Globular PI particulates grow on both the free surfaces as well as the pore walls of the polypropylene （PP） membranes as isolated islands during progressive precursor exposures. The PI-deposited PP membranes ex- hibit synergistically improved performances in various aspects. Evidently improved surface hydrophilicity and per- meation performance （30%） have been achieved v/a the MLD deposition of polyimide films. The overall separation efficiency maintained higher than 85% even after 250 cycles of MLD deposition. More importantly, the thermal sta- bility has been improved and the integrity of the porous structure for PI-deposited PP membranes has been well preserved even after harsh treatment, which ensures its potential application in industries.

关键词： Molecular layer depositionPolyimidePolypropyleneMembranesModification

Bearing mechanism of a tunnel-type anchorage in a railway suspension bridge

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Journal of Mountain Science 2021年第8期18卷 2143-2158页

作者： JIANG Nan WANG Duo FENG jun ZHANG sheng-liang huang Lin College of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of High-speed Railway Engineering Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China

A tunnel-type anchorage(TTA)is one of the main components in suspension bridges:the bearing mechanism is a key *** the deformation characteristics,development law,and failure phenomenon of a TTA under load can provide the theoretical basis for a robust *** the TTA of the Jinsha River suspension bridge at Lijiang Shangri-La railway as a prototype,a laboratory model test of the TTA was carried out for three different contact conditions between the anchorage body and the surrounding *** stress and deformation distribution law of the anchorage body and its surrounding rock were studied,and the ultimate bearing capacity and failure mode of the TTA were *** test results show that the compressive stress level is highest at the rear part of the anchorage *** away from the rear portion of the body,the stress decays in a negative exponential *** on the load transfer curve,the calculation formula for the shear stress on the contact surface between the anchorage body and the surrounding rock was derived,which shows that the distribution of the shear stress along the axial direction of the anchorage body is not *** distance from the maximum value to the loading surface is approximately 1/3 of the length of the anchorage body,and the stress decreases as the distance from the loading surface ***,the contact condition between the anchorage body and surrounding rock has a great influence on the bearing capacity of the *** increase in the anti-skid tooth ridge and radial anchor bolt can improve the cooperative working capacity of the anchorage body and the surrounding rock,which is approximately 50%higher than that of the flat contact *** main function of the anchor bolt is to increase the overall rigidity of the *** contact condition between the anchorage body and the surrounding rock will lead to a change in the failure mode of the *** an increase in the degree of contac

关键词： Tunnel anchorage Model test Load transfer curve Interface mechanical behavior

Preface to Crystalline Porous Materials

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Chinese Journal of Structural Chemistry 2022年第11期41卷 1-2页

作者： Jiandong Pang Ning huang Shuai Yuan jun-sheng Qin School of Materials Science and Engineering National Institute for Advanced MaterialsTKL of Metal and Molecule-Based Material ChemistryNankai UniversityTianjin300350China MOE Key Laboratory of Macromolecular Synthesis and Functionalization State Key Laboratory of Silicon MaterialsDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry and International Center of Future ScienceJilin UniversityChangchun130012China

Novel crystalline porous materials refer to porous materials constructed by linking organic molecule units with coordination bonds, covalent bonds, or supramolecular interactions, mainly including metal-organic frameworks(MOFs), covalent organic frameworks(COFs), metal organic cages(MOCs), and so on. Due to their predictable and designable long-range ordered structures.

关键词： porous Porous linking

Direct Ion Beam Figuring Process and Rotational Measurement Method for Ultra-smooth Aspherical Surfaces of a 46.5 nm Telescope

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Research in Astronomy and Astrophysics 2023年第11期23卷 136-149页

作者： Weichen Gu jun Yu Pengfeng sheng Qiaoyu Wu Qiushi huang Zhanshan Wang Key Laboratory of Advanced Micro-structured Materials Ministry of EducationTongji UniversityShanghai 200092China Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China

This paper describes a fabrication process for the hyperboloidal concave mirror of a 46.5 nm telescope. The180 mm aperture hyperboloidal concave mirror and 70 mm aperture compensator are machined directly from chemical mechanical polishing of a spherical surface to a high-accuracy aspherical surface by ion beam *** aspherical measurement method is the Dall null test. To minimize system errors in the measurement process,the rotational measurement method with six rotations is used in the null test. The results of the analysis for the ME(first solve the machined surface profile, then solve the system errors) and EM(first solve the system errors, then solve the machined surface profile) methods of calculation in the measurement are given. The ME method is a more accurate rotational test method, and the six rotations are appropriate for rotational measurements. After the figuring process, the hyperboloidal concave mirror surface profile reached 8.27 nm rms and the compensator surface profile is approximately 4 nm rms. The roughness of the hyperboloidal concave mirror is smooth to0.160 nm rms.

关键词： Astronomical Instrumentation Methods and Techniques instrumentation:high angular resolution telescopes

Fine Structure in the Electron Emission Process for Two DX-Like Centers in Sn-Doped AlGaAs

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Chinese Physics Letters 1998年第1期15卷 60-61页

作者： ZHAN Hua-han KANG jun-yong huang Qi-sheng Department of Physics Xiamen UniversityXiamen 361005

Fine structure in the electron emission process for DX(Sn)centers in AlGaAs has been studied with high resolution Laplace defect *** influence of the different local configuration of Al and Ga atoms around the centers on the electron thermal emissions was *** experimental evidence for the microscopic structure of two DX-like centers in Sn-doped AlGaAs is provided.

关键词： AlGaAs centers DX

Evidence of the Precipitates in the V-Shaped Defects of Undoped GaN

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Chinese Physics Letters 1999年第1期16卷 47-49页

作者： KANG jun-yong huang Qi-sheng OGAWA Tomoya Department of Physics Xiamen UniversityXiamen 361005 Department of Physics Gakushuin UniversityMejiroTokyo 171Japan

Precipitates in undoped GaN epilayers with specular surfaces grown on sapphire substrates were imaged by super high-resolution electron microscopy(HREM)and analyzed by energy-dispersive x-ray spectrometry(EDXS).The HREM images of the precipitates appeared more or less hexagonal intersection with several ten-nanometer large,which is the same as that of the V-shape *** EDXS spectra of the precipitates were mainly composed of the characteristic x-rays of oxygen,carbon,and gallium *** results suggest that the precipitates nucleate at the pinholes of the V-shape cavities and grow as the GaN growth.

关键词： shape Defects hexagonal

Synthesis,formation mechanism,and intrinsic physical properties of several As/P-containing MAX phases

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Journal of Materials Science & Technology 2023年第2期133卷 23-31页

作者： Hongxiang Chen sheng Li jun Deng Zhilong Zhang Jianeng huang Fa Chang Li huang Shixuan Du Pinqiang Dai School of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China Institute of Physics&University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100190China Fujian Provincial Key Laboratory of Advanced Materials Processing and Application Fuzhou 350118China Center for Advanced Energy and Functional Materials Fujian University of TechnologyFuzhou 350118China Songshan Lake Materials Laboratory Dongguan 523808China CAS Key Laboratory of Vacuum Physics Beijing 100049China

321 phases are an atypical series of MAX phases,in which A=As/P,with superior elastic properties,fea-turing in the MA-triangular-prism bilayers in the crystal *** now,besides Nb 3 As 2 C,the pure phases of the other 321 compounds have not been realized,hampering the study of their intrinsic ***,molten-salt sintering(MSS)and solid-state synthesis(SSS)were applied to synthesize As/P-containing 321 phases and 211 *** the phase composition of the end-product via multiple-phase Rietveld refinement,we found that MSS can effectively improve the purity of P-containing MAX phases,with the phase content up to 99%in Nb_(3)P_(2)C and 75.4(5)%in Nb 2 *** contrast,MSS performed poorly on As-containing MAX phases,only 8.9(4)%for Nb 3 As 2 C and 64(2)%for Nb 2 AsC,as opposed to the pure phases obtained by *** experimental analyses combined with first-principles calculations reveal that the dominant formation route of Nb_(3)P_(2)C is through NbP+Nb+C→Nb_(3)P_(2)***,we found that the benefits of MSS on P-containing MAX phases are on the facilitation of three consid-ered chemical reaction routes,especially on Nb 2 PC+NbP→Nb_(3)P_(2)***,the intrinsic physical properties and Fermi surface topology of two 321 phases consisting of electron,hole,and open orbits are revealed theoretically and experimentally,in which the electron carriers are dominant in electrical *** feasible synthesis methods and the formation mechanism are instructive to obtain high-purity As/P-containing MAX phases and explore new MAX ***,the intrinsic physical properties will give great support for future applications on 321 phases.

关键词： MAX phase Molten-salt synthesis Chemical reaction route Metallic ceramics Formation mechanism Quasi-harmonic approximation

Metathesis of Butylene-2 and Ethylene to Propylene over 3.0Mo/(Hβ+γ-Al_(2)O_(3))Catalysts with Differentγ-Al_(2)O_(3)Contents

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Chemical Research in Chinese Universities 2005年第2期21卷 213-216页

作者： LIU sheng-lin huang sheng-jun XIN Wen-jie BAI Jie XIE Su-juan XU Long-ya Laboratory of Natural Gas Utilization and Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023P.R.China

A series of 3.0Mo/(Hβ+γ-Al_(2)O_(3))samples withγ-Al_(2)O_(3)contents in the range of 0_100%(mass fraction)was studied by means of XRD,NH_(3)-TPD,TPR and BET determinations for characterizing their *** Hβzeolite structure in the 3.0Mo/Hβsample can be effectively stabilized by adding someγ-Al_(2)O_(3)to Hβzeolite.γ-Al_(2)O_(3)mainly favors the formation of polymolybdate or multilayered Mo oxide,while Hβmainly forms the Al_(2)(MoO_(4))_(3)species,as evaluated by the TPR *** used as the catalyst for the metathesis of butylene-2 and ethylene to propylene,there exists a close correlation between the specific surface area and stability of the *** specific surface area of the catalyst shows the maximum when{(Hβ+}γ-Al_(2)O_(3))contains 30%γ-Al_(2)O_(3),which is in agreement with that of the time needed for the reaction *** the case of maximum surface area,the rate of coke deposition is the minimum.

关键词： Butylene-2 Ethylene Propylene Metathesis Mo-impregnated(Hβ+γ-Al_(2)O_(3))catalyst {γ-Al_(2)O_(3)}content TPR/TPD/XRD characterization