用强碱性阴离子交换树脂从碳酸盐溶液中回收铀的研究 2.U(Ⅵ)在溶液相与树脂相的化学状态

在过量碳酸盐存在的Ｕ（Ⅵ）溶液中,Ｕ（Ⅵ）的化学状态与溶液的ｐＨ值有关,当ｐＨ＞８时,Ｕ（Ⅵ）以［ＵＯ２（ＣＯ３）３］４－离子存在．吸附于树脂相的Ｕ（Ⅵ）的化学状态也与供吸附的料液的ｐＨ值有关,当ｐＨ＞９时,Ｕ（Ⅵ）才完全以［ＵＯ２（ＣＯ３）３］４－吸附于树脂相．当ｐＨ在６．５～８．０范围时,Ｕ（Ⅵ）在溶液中还可能以［ＵＯ２（ＣＯ３）２］２－或Ｈｎ［ＵＯ２（ＣＯ３）３］ｎ－４形式存在,而Ｕ（Ⅵ）以［ＵＯ２（ＣＯ３）２］２－形式吸附于树脂相的可能性很小,它主要以Ｕ２Ｏ２－７的形式吸附于树脂相．     

活性炭的ζ电位对其吸附各种染料规律的影响4－活性炭对阴离子染料达旦黄的吸附

通过测定在不同ｐＨ下活性炭对阴离子染料达旦黄的吸附规律，揭示了活性炭表而的ζ电位对达旦黄吸附的作用．由于在溶液ＰＨ小于活性炭的ＰＨｚｐｃ＝６．５时，活性炭表而带小电，它对阴离子达旦黄的静电引力明显增大．当ｐＨ大于ＰＨｚｐｃ时，活性炭的表而带负电，对达旦黄阴离子产生静电斥力，引起吸附量下降．本文还进行了活性炭对阴离子染料达旦黄在不同ｐＨ下的吸附动力学和吸附热力学参数的估算，揭示了活性炭在不同ｐＨ下对达旦黄的吸附机理．     

铜离子选择性中性载体液膜光极的研制

用金属离子选择性中性载体（ＥＴＨ１０６２）研制新型铜离子选择性中性载体液膜光极．光极的检测范围为１０－５～１０－１０ｍｏｌ／Ｌ（ｐＨ＝５．７）．采用不同ＥＴＨ１０６２含量测得铜离子与ＥＴＨ１０６２的络合比为１∶２．铜离子与氢离子的离子交换常数Ｋｅｘｃｈ为０．０７４４．Ｃｄ２＋,Ｚｎ２＋,Ｆｅ２＋,Ｐｂ２＋等离子对测定没有干扰     

河口水中Cd（Ⅱ）在Fe2O3.nH2O（am.）上的特性吸附及界面…

本文叙述了盐度为５‰的河口水中Ｃｄ（Ⅱ）在Ｆｅ２Ｏ３．ｎＨ２Ｏ（ａｍ２）上的吸附等温线以及ｐＨ盐度对吸附百分率的影响，着重讨论了吸附对固－液界面电性的影响和不同盐度（ｓ＝２．５‰，５．０‰，７．５‰）时吸附Ｃｄ（Ⅱ）后变化的等电点，结果表明：Ｃｄ（Ⅱ）在Ｆｅ２Ｏ３．ｎＨ２Ｏ（ａｍ）上的吸附为特性吸附，固液界面的电性变化及等电点移动与体系的ｐＨ和Ｃｄ（Ⅱ）的吸附量有关，盐度上升，吸附量降低，由吸附～     

酸碱度对温和噬菌体存活与吸附效率的影响

实验测定了ｐＨ对Ｂａｃｉｌｕｓｔｈｕｒｉｎｇｉｅｎｓｉｓｖａｒ．ｅｎｔｏｍｏｃｉｄｕｓ温和噬菌体ＴＰ３存活与吸附效率的影响作用。结果表明：在不同ｐＨ的介质中,ＴＰ３存活的能力相差很大;酸性介质及高碱性介质对ＴＰ３都有不同程度的瞬间灭活作用;ＴＰ３存活的最适ｐＨ为７．７,且适宜其存活的ｐＨ范围很窄;ｐＨ不同,ＴＰ３吸附到苏云金芽孢杆菌表面上的效率也不同,在ｐＨ≥９范围内,ｐＨ升高,吸附效率降低。     

环境因素对黄河表层沉积物与铜液-固界面相互作用的影响

采用离子交换法,研究了黄河中游水体表层沉积物与铜的液 固界面相互作用,并绘出了离子交换率（ Ｅ％ ） —ｐＨ 曲线．由此得知,水体ｐＨ 值是控制铜离子向固相转移的主要因素,离子交换率（ Ｅ％ ） 随ｐＨ 升高而增大;表面沉积物浓度增大,Ｅ％ 增高,Ｅ％ —ｐＨ 曲线向小的ｐＨ 方向移动;而Ｃｕ２ ＋ 浓度增大,Ｅ％ 则降低,使得Ｅ％ —ｐＨ 曲线向大的ｐＨ 方向移动,说明它们对吸附物均有明显影响     

肾上腺素电化学氧化反应特性的研究

探讨了肾上腺素在ｐＨ３～７恒离子强度溶液中、玻璃碳电极上的吸附现象，解析了表面超额Γ等一系列电极过程的动力学参数．结果表明：（１）肾上腺素在玻璃碳电极上存在“弱”吸附现象，并且在ｐＨ≥３的ＭｃＩｌｖａｉｎｅ缓冲溶液中，肾上腺素的吸附量是比较大的；（２）溶液介质ｐＨ值的变化对于肾上腺素电化学氧化过程的动力学特征影响较大     

活性炭自水溶液中对钇（Ⅲ）离子及其配合物的吸附

测定了吸附的速度曲线和等温线,研究了浓度、温度、溶液ｐＨ值、无机离子、配体和表面活性剂对吸附的影响．结果表明：吸附服从通用吸附等温式,吸附过程是焓驱动的放热、熵减的自发过程;吸附最佳ｐＨ值为４．８～５．５;ＯＸ－,ＳＣＮ－,Ｐ２Ｏ４－７,ＥＤＴＡ等配体与Ｙ（Ⅲ）的配合物的吸附符合Ｌｅｃｋｉｅ提出的吸附模型Ⅰ和Ⅲ;各类表面活性剂在活性炭的等电点前后,对吸附有转折性影响,阴离子表面活性剂ＳＤＳ有明显的增吸作用,而阳离子和非离子表面活性剂有明显的抑制吸附的作用     

氢型SiO_2-TiO_2复合水合氧化物胶体对铀的吸附和吸附过程的热力学函数

合成了６种ＳｉＯ２－ＴｉＯ２复合水合氧化物胶体,研究了它们对铀的吸附．结果表明,离子强度对该二元复合胶体吸附铀的影响与溶液中铀的浓度有关;吸附铀的最佳ｐＨ范围为４～７;复合氧化物胶体中Ｓｉ与Ｔｉ的最佳摩尔比为１３．用不完全交换热力学理论估算了该交换过程的热力学函数．     

用强碱性阴离子交换树脂从碳酸盐溶液中回收铀的研究：2.U（ …

在过量羰酸盐存在的Ｕ（Ⅵ）溶液中,Ｕ（Ⅵ）的化学状态与溶液的ｐＨ值有关,当ｐＨ〉８时,Ｕ（Ⅵ）以［ＵＯ２（ＣＯ３）３］＾４－离子存在。吸附于树脂相的Ｕ（Ⅵ）的化学状态与与供吸附的料液的ｐＨ值有关,当ｐＨ〉９时,Ｕ（Ⅵ）才完全以［ＵＯ２（ＣＯ３）３］＾４－吸附于树脂相。当ｐＨ在６．５￣８．０范围时,Ｕ（Ⅵ）在溶液中还可能以［ＵＯ２（ＣＯ３）２］＾２－或Ｈｎ［ＵＯ２（ＣＯ３）３］＾ｎ－４形式存在,而Ｕ     

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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