膨润土改性与印染废水脱色研究

试验分别采用焙烧法、酸浸法(HCl)、盐浸法(NaCl)对辽宁钙基膨润土进行了改性处理,并利用改性膨润土对印染废水进行吸附脱色性能的研究。结果表明:改性膨润土的吸附性能优于天然钙基膨润土,其中500℃焙烧后改性的膨润土吸附效果最佳。最佳脱色工艺条件为:体系pH值1～3、搅拌时间20 min、改性土用量30 g/200 mL。经过处理的废水水样,色度去除率达到99.0%以上,化学需氧量(CODcr)为92.16 mg/L,达到了国家一级排放标准(GB8978-1996)。     

用改性壳聚糖对城市未达标排放污水进行再处理

采用传统活性污泥法处理城市污水，其出水CODcr、色度、SS等指标往往大于一级排放标准。采用一种新型高效的天然高分子混凝剂一改性壳聚糖VCG对城市污水用于传统活性污泥法处理后的再处理，可有效地除掉余下的污染物质。结果表明，在改性壳聚糖VCG投加量为150mg/L,pH值为5．5，沉降时间为60min 的条件下，混凝效果最佳，浊度去除率可达到92％左右，色度去除率可达88％左右，CODcr去除率可达到78％左右，悬浮物SS去除率可达91％左右，水质完全可以加收利用。     

光合细菌处理垃圾渗滤液静态试验研究

利用光合细菌(Photosynthetic bacteria PSB)混合培养物对垃圾填埋场渗滤液进行了静态试验，CODcr和BOD5去除率分别达到84．4％，和79．7％，硫化物和NH3-N去除率为97．3％和69．2％．处理后的光合细菌液可以综合利用，具有较大的经济效益．     

三维电极-电Fenton法处理垃圾渗滤液

研究了以活性炭和涂膜炭为填充电极的三维电极-电Fenton法处理垃圾渗滤液的影响因素和处理效果．通过单因素试验确定的最佳电解奈件为：电流密度57．1mA／cm^2,曝气量0．2m^3／h,Fe（Ⅱ）投加量1．0mmol／L,初始pH为4．0．在此条件下电解180min后,COD、氨氮和色度去除率分别达80．8％、55．2％和98．6％,BOD5／COD由0．125提高至0．486由GC—MS分析结果可知,三维电极-电Fenton法对垃圾渗滤液中芳烃、烷烃、羧酸和酯类等有机物具有很好的降解效果,能有效处理垃圾渗滤液．     

活性炭—H2O2催化氧化处理垃圾渗滤液的试验研究

处理垃圾渗滤液试验以活性炭作催化剂、H2O2作氧化剂。结果表明，在H2O2／COD0＝1．5，活性炭／H2O2＝0．6，pH值为2的条件下反应可以在180min内结束，其中COD及色度的去除率分别为82．8％和85．5％，臭味消失，比Fenton试剂法处理渗滤液效果要好，并对氧化机理进行了初步探讨。     

电絮凝法深度处理垃圾渗滤液的效能和工艺强化

采用电絮凝法处理生化处理后的垃圾渗滤液,考察铁铝电极的组合方式、极板间距、电流密度对渗滤液中COD、UV254、色度和磷去除效果的影响.研究发现,在最佳反应条件下,即铁电极、极板间距4 mm、电流密度为5.487 A/m2、反应1 h,对磷、COD、UV254和色度的去除率分别达到99.4％、61.2％、37.0％、7...     

采用CASS工艺协同处理渗滤液与城镇污水的准入负荷

为对接入污水厂处理的垃圾渗滤液负荷量进行控制,有效维护处理系统的正常运行,针对CASS污水处理工艺,研究其对垃圾渗滤液与城镇污水的混合液进行直接协同处理以及对经磷酸铵镁沉淀法(MAP法)预处理后的渗滤液与城镇污水的混合液进行协同处理情况下的渗滤液最大准入负荷。进行直接协同处理时,采用渗滤液占液合液的体积混合比0.50%,1.00%,1.50%,2.00%,2.50%,3.00%和3.50%;渗滤液预处理后,采用体积混合比1.00%,2.50%,3.00%,3.50%,4.00%和5.00%分别进行实验,通过测定CASS工艺进、出水的CODcr和TN质量浓度,探讨相应混合比时的渗滤液准入负荷。研究结果表明:在各自最大体积混合比条件下,直接协同处理时,CASS工艺的渗滤液最大CODcr准入负荷为23.0 g/(m3.d),最大TN准入负荷为2.8 g/(m3.d);渗滤液经MAP法预处理后协同处理时,CASS工艺的渗滤液最大CODcr准入负荷为27.0 g/(m3.d),最大TN准入负荷为17.0 g/(m3.d);渗滤液经MAP法预处理可以将CASS工艺的最大CODcr准入负荷提高14.81%,最大TN准入负荷提高83.53%。     

曝气铁碳内电解法处理垃圾渗滤液工艺研究

探讨了垃圾渗滤液的曝气铁碳内电解处理工艺。结果表明,曝气铁碳内电解工艺能显著提高垃圾渗滤液CODCr和色度的去除率,CODCr的平均去除率达到50%～80%,优于传统非曝气的工艺,色度的去除由于絮凝程度的提高也得到了增强。垃圾渗滤液经过曝气铁碳内电解处理后,pH值和氨氮变化均不大。     

垃圾渗滤液性质特点及其变化规律的实验研究

为广西区内垃圾填埋场地的设计、污染物的控制和治理提供理论依据及技术支持,通过生活垃圾模拟填埋实验,监测垃圾降解过程中垃圾体温度、沉降高度及渗滤液CODcr、BOD5、NH3-N等水质指标,研究垃圾渗滤液的降解变化规律.实验结果表明:在较短时间内垃圾渗滤液中的主要水质指标都达到最大值,CODcr为22 072 mg/L、...     

氢氧化镁浆料中和酸洗废液的研究

采用自制与市售的氢氧化镁浆料对钢铁厂酸洗废液进行中和处理实验研究，主要在浊度、色度、CODcr、六价铬（Cr（Ⅵ））和悬浮物含量SS去除率等方面进行了对比．结果表明，自制和市售的浆料处理效果相当，浊度去除率分别为86．3％、87．3％，色度去除率均为88．4％，CODcr去除率分别为44．5％、48．5％，Cr（Ⅵ）去除率均达到100％，SS去除率均为88．o％，处理后的水质达到工业废水排放标准．     

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     

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