铜,锌,镉在麦饭石上的吸附研究

报道了在水溶液中麦饭石对Ｃｕ（Ⅱ）、Ｚｎ（Ⅱ）、Ｃｄ（Ⅱ）的吸附行为．其吸附量（）随各金属离子平衡浓度的变化规律，可分别用Ｆｒｅｕｎｄｌｉｃｈ方程和Ｌａｎｇｍｕｉｒ方程描述．百分吸附量（％）随ｐＨ值变化曲线为正“Ｓ”型，麦饭石对三种金属离子交换能力大小顺序为：Ｃｕ（Ⅱ）＞Ｚｎ（Ⅱ）＞Ｃｄ（Ⅱ）．２５℃ｐＨ为６．０￣８．０条件下，三种离子的饱和吸附量次序与其相同．本文还对吸附机理进行了探讨．     

麦饭石吸铵氮能力的探讨

报道了麦饭石对水溶液中铵的吸附规律，结果表明，在一定时间内，当铵浓度相同时，吸铵率随麦饭石粒度的减小而增大；在麦饭石粒度及用量一定时，则随铵浓度的增加而增大。麦饭石对水体ｐＨ值有双向调节功能，使低ｐＨ值上升，使高ｐＨ值水体ｐＨ值下降，最终稳定８．０－８．５之间，测定了麦饭石对铵的饱和吸附量为０．２４３ｍｍｏｌ／ｇ。     

计算机在化工生产过程中PH值控制的应用研究

在化工生产过程中，有些化学反应需要在一定的ｐＨ值下才能顺利实现．而溶液的ｐＨ值受许多因素的影响，它随酸碱浓度的变化呈严重的非线性反应，因而在各种不断变化的生产环境下，保持溶液ｐＨ值的稳定不是一件容易的事情。本文介绍了电镀生产过程中，如何采用计算机对镀镍液的ｐＨ值进行控制的一种应用研究．我们在五羊自行车厂电镀车间用计算机采用大林算法对镀镍液的ｐＨ值进行控制，以代替原来的人工控制，取得了相当满意的效果。     

铀在碱式碳酸锌固—液界面分配的台阶型吸附等温线

本文报导铀在碱式碳酸锌吸附剂固——液界面分配的台阶型吸附等温线。它有一个“拐点”,两个“平台”。表明铀与碱式碳酸锌的阴离子交换过程是分级进行的。在pH等于7.4的条件下,铀与碱式碳酸锌的交换过程可能是由分级离子交换等温线计算得到交换过程中的热焓变化。作图法求得分级离子交换平衡常数     

pH和温度对亚微米强酸树脂吸附L—赖氨酸的影响

研究了溶液ｐＨ和温度对亚微米强酸树脂离子交换赖氨酸（〉３０ｇ／Ｌ）的影响，与７３２强酸树脂进行了对比，并对所得吸附等温线进行了关联，研讨其吸附模型。结果表明：ｐＨ对亚微米强酸树脂交换有明显影响，其吸附量远大于７３２树脂；温度对其影响不大，但引起了交换量极值点向ｐＨ值小的方向移动。氢型亚微米强酸树脂的吸附等温线呈现出超当量吸附和多分子层吸附两个特征，并符合ｄｅ Ｂｏｅｒ－Ｚｗｉｋｋｅｒ公式，属极性吸     

放射性核素^90Sr在石湖峪和阳坊花岗岩上吸附与迁移的特性

研究了＾９０Ｓｒ在北京地区花岗岩上的吸附与迁移行为。用间歇法测定了＾９０Ｓｒ 在石湖峪和阳坊花岗岩上的吸附比及吸附平衡时间。研究了岩石颗粒度、固液化、水相的ｐＨ值和核素载体浓度对吸附比的影响。测定了吸附等温线。用柱实验法研究了＾９０Ｓｒ在石湖峪和阳坊碎石柱上的迁移行为，并测定了阻滞系数（Ｒｆ）和柱分配系数（ＫＤ）。结果表明，北京石湖峪和阳坊花岗岩对＾９０Ｓｒ的吸附能力较差。     

膨润土对溶液中Cu~（2＋）离子的吸附作用

膨润土对溶液中Ｃｕ￣（２＋）离子的吸附量随样品中蒙脱石的含量、可交换性阳离子容量以及母液的初始浓度而变化，当母液浓度增加到一定数值后，吸附量达到极限值，不再随母液浓度的增加而变化。膨润土对Ｃｕ￣（２＋）离子的吸附等温线属Ⅰ类吸附等温线，且符合Ｌａｎｇｍｉｕｒ吸附等温方程。     

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～     

铀在碱式碳酸锌固一液界面分配的台阶型吸附等温线

本文报导铀在碱式碳酸锌吸附剂固——液界面分配的台阶型吸附等温线.它有一个“拐点”,两个“平台”.表明铀与碱式碳酸锌的阴离子交换过程是分级进行的.在pH等于7.4的条件下,铀与碱式碳酸锌的交换过程可能是R-OH+[UO_2(OH)_3]??R-UO_2(OH)_3+OH~- 由分级离子交换等温线计算得到交换过程中的热焓变化.作图法求得分级离子交换平衡常数     

己二腈加氢反应器剖析及模拟计算

本文针对辽化己二腈加氢反应器，利用现场和设计数据对反应器中流体流动参数进行了计算，进而在气体为活塞流动，液固进程活塞流动假设下利用四阶龙格库塔法在计算机上求算了转化率等重要参数随高的变化关系，其转化率的计算值与计值和现场值吻合。     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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