液膜联合活性炭处理含酚模拟废水的实验研究

研究以Span-80-煤油作膜相、NaOH溶液为内水相的乳状液膜结合活性炭处理舍酚废水的最佳操作条件,考察Span-80用量,制膜时间、乳水混合时间等不同因素对乳状液膜法提取苯酚和活性炭吸附苯酚的影响．实验结果表明,对含酚1mg／ml的废水,经液膜法和活性炭处理后,除酚率可以稳定的达到99％。     

乳状液膜萃取柠檬黄及其油相回收的工艺研究

通过制备油包水(W/O)乳状液并利用加电三维螺旋状微通道对W/O乳状液的快速高效破乳作用,探究了乳状液膜萃取柠檬黄及其油相回收的优化工艺.主要考察了乳水比和外水相pH值对乳状液膜分离效率的影响.实验结果表明:在搅拌转速为400 rpm、搅拌时间为5 min条件下,当乳水比为1:2、外水相pH=2、柠檬黄的初始浓度为100 mg·L~(-1)时,乳状液膜对于水溶液中的柠檬黄去除率最高可达77%.利用加电三维螺旋板式微通道对萃取后的乳状液进行破乳,其油相回收率可达82%.     

液膜法处理含锌废水的研究

研究了以HS－1和煤油作膜相,D2EHPA为流动载体,1mol／LH2SO4为内水相所组成的乳化液膜处理含锌废水,测定了表面活性剂种类和用量、乳水比、油水比对除锌率的影响,结果表明：当ρ（HS－1）＝0．015g／mL,油水比为4：3,乳水比为7：30,混合时间为25min时,除锌率可达97％以上。     

以Span80为乳化剂制备煤油包水乳状液的实验研究

为了制备能够模拟乳状液膜分离过程中使用的模型乳状液,以Span80作为乳化剂利用高速搅拌乳化法制备了含有内水相化合物的煤油包水乳状液.考察了内水相化合物种类及浓度、搅拌转速、搅拌时间、乳化剂浓度、含水率等因素对乳状液的静置沉降稳定性的影响,同时确定了内水相化合物为NaOH时乳状液的相转变点.实验结果表明:以NaOH作为内水相化合物时,最佳乳化条件为:NaOH浓度0.25 mol·L-1,Span80浓度3g·L-1,含水率45％,搅拌转速14000rpm,搅拌时间2 min,所得乳状液在2h内的静置沉降稳定性可达88％以上;控制其他条件不变,当NaOH浓度为0.25 mol·L-1时,相应的其相转变点含水率为55％,而当NaOH浓度为下降到0.02 mol·L-1时,相应的其相转变点含水率变为45％;增加乳化剂浓度,提高搅拌转速,增加搅拌时间,降低NaOH浓度有利于增强乳状液的稳定性.     

铝（Ⅲ）在乳状液膜体系中的迁移行为

研究了铝(Ⅲ)在乳状液膜分离体系中的迁移行为.确立了最佳迁移条件: 制乳搅拌速度2 400 r/min,制乳时间10 min,乳液与外相溶液混合时间15 min,乳水比0.4,磷酸三丁酯(TBP)浓度4.5 %,span80和液体石蜡浓度均为7.9 %,内相和外相HCl浓度分别为1.0 mol/L和3.0 mol/L.在此条件下,铝(Ⅲ)的迁移率达90 %以上.     

乳状液膜法分离水中锌

报道了用乳状液膜法分离锌的研究.确立了最佳分离条件:制乳搅拌速度3200 r/min,制乳时间以及乳液与外相溶液混合时间均为10min,乳水比和油内比分别为0.2和0.714,磷酸三丁酯(TBP)浓度2.9%,span80和液体石蜡浓度均为4.4%,外相HCl浓度0.01mol/L.在此条件下,除锌率达95%以上.     

二氧化碳用于除酚后液膜乳状液破乳

介绍了将二氧化碳用于除酚后液膜乳状液破乳的方法．指出研究的体系苯酚为一破乳剂,并指明了可供二氧化碳破乳的除酚后液膜乳状液的组成及破乳时二氧化碳的用量．     

乳状液膜分离丹参水提液中的丹酚酸B

建立了一种通过油包水(W/O)乳状液膜体系分离丹参水提液中丹酚酸B的方法。通过对内水相氢氧化钠浓度、表面活性剂山梨糖醇酐油酸酯(Span80)用量、载体三辛胺浓度、油内比、乳水比和迁移时间的优化,获得了一个高效的乳状液膜体系。最优提取条件为氢氧化钠浓度0.012 5 mol/L,山梨糖醇酐油酸酯质量分数4.0%,三辛胺浓度0.01 mol/L,油内比10:6,乳水比1:4,迁移时间10 min。实验结果表明,在优化条件下,该乳状液膜体系能快速有效地从实际样品中提取分离丹酚酸B。     

乳状液膜脱酚的进一步研究

对生产古马隆树脂的含酚废水采用乳状液膜法脱酚进行了探讨，试验了乳状液膜的稳定性和搅拌强度，内相试剂的浓度、油内比、乳水接触时间、温度、酸度及不同表面活性剂浓度对除酚效率的影响。对酚含量为６００ｐｐｍ的废水，经一级处理可净化到５ｐｐｍ以下，净化率达９９％以上。此外，还讨论了表面活性剂的适宜用量及液膜的循环利用。     

乳状液膜法分离富集锌(Ⅱ)

报道了用乳状液膜法分离锌离子的研究.在此分离体系中,采用失水山梨醇单油酸酯(span80)–十二烷基磺酸钠(SDS)为表面活性剂,磷酸三丁酯(TBP)为流动载体,氨水为内相试剂.详细讨论了乳水混合时间、表面活性剂浓度、内相试剂浓度以及乳水体积比对分离效果的影响,确定了锌(Ⅱ)的最佳分离富集条件为乳水混合时间10 min、内相NH3浓度0.6 mol/L、span80浓度5 %、乳水体积比0.25,在此条件下,锌(Ⅱ) 的去除率可高于95 %.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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