含镍废水的隔膜电解法回收工艺研究

以含有一定浓度硼酸的含镍电镀废水作为阴极液,2％的NaOH水溶液为阳极液,阴离子交换膜为隔膜材料组成隔膜电解装置,对含镍电镀废水进行了回收工艺研究。考察了电解时间、电流密度、pH值、温度及硼酸浓度对镍回收率的影响。结果表明,延长反应时间、提高电解温度、增加硼酸浓度有利于提高回收率。在电流密度为300 A／m2,pH=4,温度为35℃,硼酸浓度为25 g／L的最佳工艺条件下电解6 h,镍的回收率高达96.64％,所得镍为松枝状结构电解镍,纯度为94.69％。     

Fe3O4／聚（丙烯酸甲酯-二乙烯苯）微球对金属离子的吸附

通过悬浮聚合制备Fe3O4／聚（丙烯酸甲酯-二乙烯苯）磁性微球，考察了微球对金属离子的吸附性能。结果表明，磁性吸附剂粒径35—55μm，Fe3O4质量分数18％，能有效吸附金属离子。由Langmuir模型得到的饱和吸附容量为别为：Hg2＋2．3mmol／g,Cu^2＋2mmol／g，Ni^2＋ 1．1mmol／g。由Lagergrent方程计算的吸附速率常数分别为：Hg^2＋0．023min^-1，Cu^2＋0．034min^-1，Ni^2＋0．036min^-1。吸附剂可用1mol／LH2SO4再生。     

膜生物反应器处理餐饮废水的初步研究

通过对膜生物反应器处理餐饮废水的研究，分别考察了膜组件的操作压力，膜面流速以及活性污泥浓度等对膜通量的影响．结果表明，膜组件的操作条件为：P=0．2MPa，V=6．5m／s-7．5m／s时较为合适；压力比较低时，膜通量与压力成正比，压力比较高时，膜通量与压力无关．随温度的升高，膜通量成比例的增加．膜通量与污泥浓度呈线性关系．膜面流速并非越高越好．采用SEM对膜污染情况进行了分析．并对膜清洗方法进行了研究．本实验确定膜的清洗条件为：清水冲＋0．2％Na10（浸泡0．5h）＋1％醋酸（浸泡0．5h），清水反冲可使膜通透能力略有恢复，NaC10浸泡后可使无机膜通透能力恢复到原来的62％，酸洗后可使无机膜通透能力恢复到原来的84％以上．     

丙烯酸正丁酯合成反应的负载型固体催化剂的研究

选用强酸性阳离子交换树脂、活性氧化铝和活性白土三种栽体,以漫渍法分别负载活性组分H^ ,Ni^2 ,Fe^3 ,Mb^2 ,Al^3 ,Mx^2 ,Sn^4 ,制成了几种固体酸催化剂．进行载体和活性组分的试验,筛选出综合性能较好的用于酯化反应的Mx^2 ／树脂催化剂,并对此催化剂的制备工艺进行了改进．改进后的催化剂应用于丙烯酸正丁酯的合成,酯化收率达到97％以上．     

Fe-Ni-B/TiO2纳米合金催化KBH4水解析氢性能的研究

以TiO2为载体，以Fe^2＋、Ni^2＋的盐溶液为浸渍液，采用浸渍涂覆法制备了Fe-Ni-B／TiO2纳米合金催化剂．考查了不同Fe^2＋、Ni^2＋盐溶液为浸渍液以及浸渍次数对Fe-Ni-B／TiO2纳米合金催化KBH4析氢性能的影响．实验表明，Fe^2＋、Ni^2＋的硝酸盐溶液为浸渍液浸渍3次时纳米合金的催化性能优良，尤其当pH=8时，Fe-Ni-B／TiO2纳米合金催化KBH4析氢性能最佳．     

高负荷工况下软化器运行参数的优化研究与实践

通过对软化器进盐、正洗等操作和进水流量、再生液浓度等参数的优化研究，发现预正洗操作的加入，可以将软化器使用压期延长41．1％，周期软水产量上升38．9％。软化器的周期软水产量在进水流量范围90～130m3／h之间与进水流量成反比，下降程度为1．637吨软水／（吨进水。吨树脂）；平均浓度为4．57％N自然溶解的盐水的浓度梯度为6．49％／米；对于同一个软化器，其余条件相同，盏浓度在4．2～5．9％时，软化器周期软水产量与再生液浓度成正比。经过优化后，软水站盐耗下降15．8吨/月，同比下降15．7％，水耗下眸6125吨，月，同比下降8．1％。     

2-[2’-（5-硝基-吡啶）-偶氮]-1，8-二羟基萘-3，6-二磺酸与镍显色反应的研究与应用

研究了显色剂2-[2’-（5-硝基一吡啶）-偶氮]-1,8一二羟基萘-3,6-二磺酸（简称为5-NO2-PACA）光度法测定微量镍的方法。在pH=11．5的NH3-NH4C1的缓冲介质中Ni^2＋与5-N02-PACA在室温下很快形成1：1的蓝色配合物,最大吸收波长为635nm,表观摩尔吸光系数ε=1．00×10^5L·mol^-1·cm^-1,Ni^2＋浓度在0—20μg／25mL范围内符合朗伯一比尔定律,该方法用于测定蔬菜（黄瓜、青椒）中微量镍,结果满意。     

用钙基膨润土生产无机凝胶--超细钠基膨润土的制备新工艺研究

研究了钙基利用膨润土生产无机凝胶工艺中超细钠基膨润土的制备工艺条件，以高速分散机作为分散设备，以0．4％焦磷酸钠作为分散剂，钠化搅拌45分钟制得超细钠基膨润土的平均粒度为1．573μm。CEC为115mmol／100g土，膨胀容39．5ml／g。     

内循环式A/O/IAT-IAT同步生物脱氮除磷工艺特性研究

报道了自主开发的内循环式A／O／IAT-IAT同步脱氮除磷工艺的运行特性．试验以模拟废水为处理对象,对该工艺在三种不同工况下的运行效果进行比较．试验结果显示,在进水COD、BOD5、NH4^＋-N、PO4^3--P浓度分别为629．7～821．6mg／L、360～580ms／L、36．9～59．8mg／L、6．0～7．6mg／L,总水力停留时间为20hr,污泥龄为3．5d,污泥回流比为200％的条件下,COD、BOD5、NH4^＋-N和PO4^3--P去除率分别为97％～99％、99％、89％～99％和89％～98％,出水水质达到了国家城镇污水处理厂污染物排放一级A标准（GB18918—2002）．在各项运行控制条件中,HRT和SRT是影响该工艺运行效果的主要因素．     

X70钢在模拟大气腐蚀水中的腐蚀行为研究

采用极化曲线法和交流阻抗法研究了X70钢在含0．5g／L的Na2SO4、Na2CO3、NaCl模拟大气腐蚀水中的电化学行为．结果表明：随着浸泡时间的延长,X70钢腐蚀速率逐渐降低;液膜厚度在1000—800μm时,阴极极限扩散电流变化不大,液膜厚度小于800μm时,阴极极限扩散电流剧增．随着液膜厚度减薄,X70钢腐蚀速率呈增大趋势．     

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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