微波法制备污泥活性炭及其在制药废水处理中的应用

采用微波加热法,以制药厂污泥为原料,氯化锌为活化剂制备污泥活性炭.结果表明,微波功率、辐照时间和氯化锌浓度对污泥活性炭吸附性能具有较大的影响.制备污泥吸附剂的适宜条件为:干污泥与CuSO4质量比为20∶1,ZnCl2浓度为4 mol/L,微波功率为464W,辐照时间为5min.利用该活性炭处理制药废水,脱色率和COD去除率分别达到90.2%和91.6%.     

微波-H_2O_2-活性炭协同催化氧化处理苯酚废水

采用微波、H2O2和活性炭协同催化氧化法处理苯酚废水,探讨各种因素协同作用以及对苯酚废水处理效果的影响.结果表明,微波-H2O2-活性炭氧化体系能高效快速降解废水中苯酚,100 mL初始pH为5、质量浓度为100 mg/L的苯酚废水中,在活性炭3 g、微波辐射18 min、微波辐射功率200 W、H2O2质量浓度1.5 g/L的最佳处理工艺条件下,苯酚去除率达98.5%.     

微波法制备玉米穗轴活性炭的初步研究

以玉米穗轴为原料,Na2CO3为活化剂,采用微波加热来制备活性炭,研究了微波功率、辐照时间、Na2CO3浓度、固液比等因素对活性炭的影响。通过正交实验,确定了最佳工艺参数。结果表明,微波功率280W,Na2CO3浓度10％,辐照时间10min,液固比3：1时活性炭的碘值最大;微波功率462W,Na2CO3浓度20％,辐照时间9min,液固比为2：1时活性炭的产率最高。方差分析表明对碘值来说,各因素的影响均未达到显著水平;对产率而言,Na2CO3浓度的影响是高度显著的,微波辐照时间也是显著的。     

活性炭吸附苯酚及其微波辐照再生效果

考察预处理后颗粒活性炭(GAC)对苯酚的吸附行为,探讨微波辐照再生吸附苯酚活性炭的机理,确定GAC达到吸附平衡的时间及吸附过程符合的等温吸附模型.实验结果表明:3 h后GAC吸附基本达到平衡,吸附过程符合Freundlich等温吸附模型,最大平衡吸附量为143.7 mg/g.对吸附饱和苯酚GAC进行微波辐照再生研究,实验结果表明:最佳的再生条件为微波功率520 W,再生时间15 min,GAC用量为6 g,此时GAC再生效率为86.5%.     

微波诱导氧化处理苯酚废水研究

采用微波诱导氧化工艺处理苯酚废水,以颗粒活性炭为催化剂,考察了活性炭粒径、溶液pH值、活性炭用量、微波辐射功率、微波辐射时间等因素对处理效果的影响。结果表明,采用12～18目的活性炭6g与100mL废水混合,在微波辐射功率为462W,辐射时间为5 min的工艺条件下,苯酚去除率达到94．17％,废水的pH对处理效果几乎没有影响。通过正交实验研究表明,各因素对处理效果的影响依次为：活性炭用量〉微波辐射时间〉微波功率〉pH值。进一步研究表明,微波诱导氧化对苯酚的处理效果优于活性炭吸附和单纯的微波加热,这是活性炭吸附和微波诱导氧化协同作用的结果。反应动力学研究表明,该氧化过程符合一级反应动力学规律。     

微波-活性炭催化法处理结晶紫溶液的研究

以结晶紫溶液为处理对象,研究在活性炭存在和通入空气的条件下,微波辐射处理染料废水的可行性及其影响处理过程的因素和影响规律．结果表明：(1)微波具有加速结晶紫裂解和被氧化速度的作用,如在溶液中加入活性炭或通入空气,均能提高结晶紫的去除速率;(2)增加微波辐射电压、处理时间和活性炭用量(固液比)均能提高微波—吸附催化法处理结晶紫溶液的脱色率．不同的溶液浓度,脱色率也不同,浓度越高,脱色率越大;(3)微波辐射—活性炭催化法对结晶紫废水的处理有很好的可行性,在1：10的固液比下,微波辐射30min,可达到99．6％的脱色率．     

微波辅助制备甜菜渣活性炭

为了使甜菜渣得到更加充分有效的利用,本文探究了以甜菜渣为原料、氯化锌为活化剂、微波辅助制备甜菜渣活性炭的可行性。本文研究了甜菜渣和氯化锌溶液的比例(料液比)、氯化锌浓度、微波功率和辐照时间对活性炭吸附性能和产率的影响,并用氮气等温吸附、红外光谱和扫描电镜分析了最优制备条件下活性炭的比表面积、表面官能团和微观孔结构,得出其制备的最佳工艺条件为:料液比1∶6,氯化锌浓度30%,微波功率700 W和微波时间10 min。相应的活性炭的碘吸附量为1127.57 mg/g,亚甲基蓝吸附量为217.7 mg/g,产率为25.9%,BET比表面积为927.36 m2/g,总孔容为0.39 cm3/g,且表面具有含氧官能团和较好的孔结构。实验结果证实,以甜菜渣为原料、氯化锌为活化剂的微波辅助制备甜菜渣活性炭是可行的,为开发甜菜渣的高附加值产品提供了理论依据。     

甘蔗渣微波制备活性炭吸附剂及其再生研究

以甘蔗渣为原料,氯化锌、磷酸和氢氧化钠为活化剂,微波制备活性炭吸附剂,考察了活化剂浓度、料液比、浸渍时间、微波功率和辐射时间等对活性炭产率和吸附性能的影响.活性炭指标为:亚甲基蓝吸附值136 mL/g,碘的吸附值1 163.7mg/g,A法焦糖脱色率108.9%,优于国家一级品指标.用该活性炭处理酱油模拟废液后再生,其亚甲基蓝吸附值为105mL/g,碘的吸附值为1 186.4mg/g,A法焦糖脱色率为111.5%,仍优于国家一级品指标,并且再生活性炭对酱油废液具有更佳的处理效果.该方法操作方便,缩短了活性炭的制备和再生时间,再生效果好.     

石油焦预氧化及多孔碳的制备

以石油焦和含油污泥为原料,在活化剂的作用下共同热解制备多孔活性炭材料。将得到的多孔碳进行碘吸附值、苯吸附值、BET等测定,确定多孔碳的比表面积及孔结构。研究硝酸预处理石油焦对多孔碳性能的影响以及微波功率和微波辐照时间对多孔碳的影响。结果表明:经硝酸氧化处理所得的活性炭吸附性能明显提高;微波功率越高对物料的活化作用越好,经微波活化的活性炭吸附性能越好;在微波功率800 W条件下,比表面积最大为1 396.91m2/g;微波加热时间约30 min可获得明显的催化效果。     

竹炭微波改性及对4-硝基苯酚的吸附动力学研究

利用微波氯化锌法对竹炭进行改性,以提高其吸附性能.通过正交实验,优化改性工艺条件,并用改性竹炭对4-硝基苯酚的吸附动力学和机理进行探讨.结果表明,最佳工艺条件为:固液比为1∶2时,50%氯化锌溶液浸泡8 h,800 W微波功率辐照6 min,相对于未改性竹炭,其比表面积、孔容、对4-硝基苯酚的吸附量明显增大.用伪二级吸附速率方程拟合,相关系数r＞0.999,颗粒内扩散过程不是该吸附速率的控制步骤.改性竹炭对4-硝苯酚的吸附是一个吸热过程,吸附活化能为16.81 kJ·mol-1,以物理吸附为主.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has