检索结果-南通市图书馆

Special issue on “Membranes and Water Treatment”

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2022年第5期16卷 561-563页

作者： congjie Gao Nanping Xu Weihong Xing Center for Membrane and Water Science&Technology Zhejiang University of TechnologyHangzhou 310014China State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 211816China National Engineering Research Center for Special Separation Membranes Nanjing Tech UniversityNanjing 211816China

Water scarcity is becoming the greatest global crisis of our *** increasing demand for clean and safe water calls for intensive research on advanced water treatment *** decades have witnessed the rapid development of membrane technology,which are competitive for water and wastewater treatment,and encouragingly,some of them have been commercialized *** advances in material science have substantially promoted the further development of membranes technology in the aspects of membrane materials,membrane microstructure and fabrication process.

关键词： wastewater treatment becoming

Using bipolar membrane electrodialysis to synthesize di-quaternary ammonium hydroxide and optimization design by response surface methodology

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2017年第9期25卷 1176-1181页

作者： Jiangnan Shen Zhendong Hou congjie Gao Center for Membrane Separation and Water Science & Technology Zhejiang University of Technology

Bipolar membrane electrodialysis(BMED) has already been described for the preparation of quaternary ammonium hydroxide. However, compared to quaternary ammonium hydroxide, di-quaternary ammonium hydroxide has raised great interest due to its high thermal stability and good oriented *** order to synthesize N,N-hexamethylenebis(trimethyl ammonium hydroxide)(HM(OH)_2) by EDBM,experiments designed by response surface methodology were carried out on the basis of single-factor experiments. The factors include current density, feed concentration and flow ratio of each compartment(feed compartment: base compartment: acid compartment: buffer compartment). The relationship between current efficiency and the above-mentioned three factors was quantitatively described by a multivariate regression model. According to the results, the feed concentration was the most significant factor and the optimum conditions were as follows: the current efficiency was up to 76.2%(the hydroxide conversion was over 98.6%), with a current density of 13.15 m A·cm^(-2), a feed concentration of 0.27 mol·L^(-1) and a flow ratio of 20 L·h^(-1):26 L·h^(-1):20 L·h^(-1):20 L·h^(-1) for feed compartment, base compartment, acid compartment, and intermediate compartment, respectively. This study demonstrates the optimized parameters of manufacturing HM(OH)_2 by direct splitting its halide for industrial application.

关键词： Di-quaternary ammonium hydroxide Bipolar membrane electrodialysis Response surface methodology N,N-hexamethylenebis(trimethyl ammonium hydroxide)

Reductant-assisted polydopamine-modified membranes for efficient water purification

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2021年第1期15卷 109-117页

作者： Feng Sun Jinren Lu Yuhong Wang Jie Xiong congjie Gao Jia Xu Key Laboratory of Marine Chemistry Theory and Technology(Ministry of Education) School of Materials Science and EngineeringCollege of Chemistry and Chemical EngineeringOcean University of ChinaQingdao 266100China National Center of Ocean Standards and Metrology Tianjin 300112China

Surface engineering with polydopamine coatings has been considered a promising surface functionalisation ***,it is difficult to control the self-polymerisation for polydopamine formation,which usually causes severe interparticle *** this study,polydopamine self-polymerisation was controlled by adjusting its reducing environment using a reductant(NaBH4)to fabricate mixed cellulose ester(MCE)/polydopamine *** oxidising environment using NaIO4 was additionally tested as the *** results showed that a thin polydopamine coating with small polydopamine particles was formed on the skeleton frameworks of the MCE membrane with NaBH4,and the self-polymerisation rate was *** polydopamine coating formed in the reducing environment facilitated excellent water transport performance with a water permeance of approximately 400 L·m^(−2)·h^(−1)·bar^(−1) as well as efficient organic foulant removal with a bovine serum albumin rejection of approximately 90%.In addition,the polydopamine coating with NaBH4 exhibited both excellent chemical stability and anti-microbial activity,demonstrating the contribution of the reducing environment to the performance of the MCE/polydopamine *** shows significant potential for use in water purification.

关键词： membrane water purification polydopamine reducing environment self-polymerization control

Generalized entropies under different probability normalization conditions

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2011年第34期56卷 3649-3653页

作者： OU congjie CHEN JinCan College of lnformation Science and Engineering Huaqiao University Xiamen 361021 China Department of Physics Xiamen University Xiamen 361005 China

Tsallis entropy and incomplete entropy are proven to have equivalent mathematical structure except for one nonextensive factor q through variable replacements on the basis of their forms. However, employing the Lagrange multiplier method, it is judged that neither yields the q-exponential distributions that have been observed for many physical systems. Consequently, two generalized entropies under complete and incomplete probability normalization conditions are proposed to meet the experimental observations. These two entropic forms are Lesche stable, which means that both vary continuously with probability distribution functions and are thus physically meaningful.

关键词：概率分布函数广义熵正常化 Tsallis熵拉格朗日乘数法数学结构变量替换物理系统

A three-process quantum engine cycle consisting of a two-level system

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2014年第7期57卷 1266-1273页

作者： OU congjie HUANG ZhiFu LIN BiHong CHEN JinCan College of Information Science and Engineering Huaqiao University Department of Physics Xiamen University

Based on the thermodynamic properties of isoenergetic,adiabatic and isothermal quantum processes,it is shown that it is possible to combine the three processes into a quantum engine *** efficiency of the three-process cycle can be derived and is dependent on the highest and lowest *** efficiency in some operation regions does not demonstrate a monotonically increasing function of the temperature *** the highest temperature of the cycle is larger than the critical temperature,which can be determined by the characteristics of the three-process cycle,a unique region where the efficiency decreased with the increase of the temperature difference exists.

关键词： quantum engine isoenergetic process critical temperature

Influence of Temperature on the Protectiveness and Morphological Characteristics of Calcareous Deposits Polarized by Galvanostatic Mode

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2014年第1期27卷 131-139页

作者： Chengjie Li Min Du Jing Qiu Jing Zhang congjie Gao The Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationCollege of Chemistry and Chemical EngineeringOcean University of China

The influence of temperature on calcareous deposits formed under galvanostatic polarization mode was studied. The deposition was monitored by electrochemical impedance spectrum, and a supplementary loop in Nyquist diagram at high frequency was found to be an indicator of deposits precipitation with sufficient protection at above 20 ~C. An exponential increase of protectiveness with temperature was observed, which was quantified by linear polarization resistance technique. Observation by scanning electron microscope and X-ray diffraction analyses demonstrated that the critical temperature of calcium carbonate crystal form transition ranged from 15 to 20 ℃. Calcite formed below 15 ℃, while aragonite precipitated at above 20 ℃.

关键词： Calcareous deposits Temperature Galvanostatic Cathodic protection

Separation of mixed salts(Cl-/SO42-) by ED based on monovalent anion selective membranes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2019年第4期27卷 857-862页

作者： Jiefeng Pan Wei Zhang Huimin Ruan Jiangnan Shen congjie Gao Center for Membrane Separation and Water Science & Technology Ocean College Zhejiang University of Technology Hangzhou 310014 China Huzhou Institute of Collaborative Innovation Center for Membrane Separation and Water Treatment Zhejiang University of Technology 1366 Hongfeng Road Huzhou 313000 China

The industrial products or wastewater rich in the mixed salts(Cl-/SO4^2-) not only causes the environmental damage, but also induces waste of resource. In this study, an ED stack with monovalent selective AEMs and conventional CEMs was employed to separate the Cl-and SO42-from simulated wastewater. The effect of current density and mass fraction percentage was investigated in order to optimize the experimental conditions during ED process. It was found that at a concentration ratio between NaCl and Na2SO4 of 95/5(wt%/wt%) and a current density of40 m A·cm^-2, a current efficiency of 72%, an energy consumption of 1.6 k W·h·kg^-1 Na Cl and a Cl-/SO4^2-concentration(67.5/3.5 g·L^-1) were obtained. Hence, it is appropriate and effective to separate Cl-and SO42-by ED using the monovalent selective AEMs.

关键词： Electrodialysis Separation of the mixed salts Monovalent selective AEMs Ion separation

Charge and separation characteristics of nanofiltration membrane embracing dissociated functional groups

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2014年第5期8卷 650-658页

作者： Zhun MA Meng WANG Xueli GAO congjie GAO Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education College of Chemistry and Chemical Engineering Ocean University of China Qingdao 266100 China Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua University Beijing 100084 China

The current work focused on the investigation of charge and separation characteristics of nanofiltration （NF） membrane embracing dissociated functional groups under different electrolyte solutions. The electro-kinetic method was carried out to assess the membrane volume charge density （X） with different salt concentrations ranging from 0.1 to 10 mol. m-3 and different electrolyte species, such as type 1-1, type 2-1 and type 3-1. The Donnan steric pore model-dielectric exclusion （DSPM- DE） model was employed to evaluate the separation characteristics of the NF membrane for wide range of electrolyte concentration （from 25.7 to 598.9mol·m^-3）. The results indicated that the dissociation of the hydro- philic functional groups and the specific adsorption contributed to charge formation on membrane surface. The former played a dominant role in type 1-1 and type 2-1 electrolytes at dilute aqueous solutions （0.1-0.5 mol · m^3）. However, for type 3-1 electrolyte, specific adsorp- tion should contribute to the charge effect to a large extent. Moreover, the correlation between the volume charge density and feed concentration was in accordance with Freundlich isotherm. Furthermore, it was found that the separation characteristic of NF membrane could be evaluated well by DSPM-DE model coupling with electro-kinetic method in a whole concentration range.

关键词： Sulfonated polyethersulfone nanofiltrationmembrane charge characteristics electro-kinetic method,volume charge density separation behavior

Performance of a two-state quantum engine improved by the superposition effect

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

Science China(Physics,Mechanics & Astronomy) 2013年第10期56卷 1815-1821页

作者： OU congjie HUANG ZhiFu LIN BiHong CHEN JinCan College of Information Science and Engineering Huaqiao University Department of Physics Xiamen University

The performance of a two-state quantum engine under different conditions is analyzed. It is shown that the efficiency of the quantum engine can be enhanced by superposing the eigenstates at the beginning of the cycle. By employing the finite-time movement of the potential wall, the power output of the quantum engine as well as the efficiency at the maximum power out- put （EMP） can be obtained. A generalized potential is adopted to describe a class of two-level quantum engines in a unified way. The results obtained show clearly that the performances of these engines depend on the external potential, the geometric configuration of the quantum engines, and the superposition effect. Moreow^r, it is found that the superposition effect will en- large the optimally operating region of quantum engines.

关键词： quantum engine superposition effect generalized potential