活性炭吸附罗丹明B的研究

文章以活性炭为吸附剂,对罗丹明B溶液进行吸附。考察了活性炭加入量、pH值和温度对吸附的影响以及吸附动力学。结果表明,随着活性炭加入量的逐渐增加,吸附值逐渐减小;随着pH逐渐升高,吸附值呈下降趋势。吸附值随温度升高呈下降趋势,表明活性炭对罗丹明B溶液的吸附是一个放热过程。活性炭对罗丹明B的吸附较好的符合Langmuir吸附模型。     

剩余活性污泥制备活性炭吸附罗丹明B的研究

以城市污水处理厂的脱水污泥作为主要原材料,以氯化锌(Zn Cl2)溶液为活化剂,通过化学活化法制得活性炭,并将其用于吸附罗丹明B染料,考察了p H值、吸附时间、溶液初始浓度和温度对吸附效果的影响.结果表明,在45℃,p H=4,初始浓度25mg/L时,反应时间80min,吸附率可达95%以上,污泥活性炭对罗丹明B的饱和吸附量为26.62mg/g.以污水厂污泥为原料制备出的污泥活性炭对罗丹明B染料废水进行吸附是可行的.     

碳氟表面活性剂改性活性炭对罗丹明染料的吸附性能

以十六烷基三甲基溴化铵、十二烷基硫酸钠、曲拉通、阴离子碳氟表面活性剂FS-62和非离子碳氟表面活性剂FS-3100为改性剂对颗粒活性炭进行改性,并将改性活性炭用于模拟废水中罗丹明B染料的吸附脱色性能研究。考察了活性炭吸附过程中改性剂种类、改性活性炭用量、吸附时间、体系温度等因素对活性炭吸附性能的影响。正交实验结果表明,碳氟表面活性剂FS-62改性活性炭用量为0.3 g/L、吸附时间为40 min、体系温度为70℃条件下,改性活性炭对罗丹明染料的脱色率较高。利用扫描电子显微镜分析了活性炭改性前后的形貌特征,并初步探究了FS-62改性活性炭对罗丹明染料的脱色吸附反应动力学特性。     

山竹壳活性炭的制备与吸附性能研究

以山竹壳为原料,采用氢氧化钾活化法制备了不同碱炭比的活性炭,通过扫描电子显微镜(SEM)和比表面积(BET)等对活性炭进行了物理性质表征.最优活性炭的比表面积高达2 96153 m2/g.对其进行罗丹明B和铅离子的吸附实验,并进行Langmuir和Freundlich吸附模型拟合,结果表明,山竹壳活性炭对罗丹明B的吸附更符合Langmuir吸附等温模型,而铅离子的吸附符合2种吸附模型.另外,该活性炭对罗丹明B和铅离子的饱和吸附量分别达到1 22218 mg/g和10707 mg/g.     

TiO_2借自然光催化罗丹明B溶液降解脱色的研究

研究了以TiO2为光催化剂,在可见光照条件下模拟染料废水罗丹明B溶液的光催化脱色性能。实验结果表明:催化剂的投入量,罗丹明B的初始质量浓度,光照时间是影响罗丹明B溶液脱色率的重要因素;当TiO2催化剂用量为4.0 g/L,罗丹明B的初始质量浓度为10 mg/L,光照时间为2.5 h时,罗丹明B溶液的脱色率可达99.2%。     

罗丹明B在竹炭上的吸附研究

研究了竹炭的粒径与用量、罗丹明B溶液的pH值与初始浓度、吸附时间和温度等因素对去除率的影响.研究结果表明:竹炭对罗丹明B吸附随其用量的增加而增大;罗丹明B初始浓度增大,竹炭对其去除率减小;溶液的pH值为3.0～5.0时,吸附效果好;竹炭对罗丹明B的吸附可在3h达到平衡.最佳吸附温度为70℃,等温吸附服从Freundlich方程式.竹炭是较为理想的吸附罗丹明B的材料.     

氧化石墨烯和石墨烯对离子型染料不同吸附性能研究

采用改进的Hummers法制备了氧化石墨烯,将其采用水合肼还原获得石墨烯,以氧化石墨烯和石墨烯为吸附剂,分别采用透射电镜（TEM）,傅里叶变换红外光谱（FT-IR）,拉曼光谱（RS）和X射线衍射光谱（XPS）对阴阳离子的不同吸附性能进行了分析表征.结果表明：两吸附剂对罗丹明B的吸附能力较甲基橙强,最大吸附容量分别为551.2 mg/g和476.2 mg/g,各吸附体系中的吸附行为都符合Langmuir等温吸附模型和二级动力学反应特征.     

氧化石墨烯和石墨烯对离子型染料不同吸附性能研究

采用改进的Hummers法制备了氧化石墨烯,将其采用水合肼还原获得石墨烯,以氧化石墨烯和石墨烯为吸附剂,分别采用透射电镜(TEM),傅里叶变换红外光谱(FT-IR),拉曼光谱(RS)和X射线衍射光谱(XPS)对阴阳离子的不同吸附性能进行了分析表征.结果表明:两吸附剂对罗丹明B的吸附能力较甲基橙强,最大吸附容量分别为551.2 mg/g和476.2 mg/g,各吸附体系中的吸附行为都符合Langmuir等温吸附模型和二级动力学反应特征.     

CS-CNTs-SA复合材料的制备及其对水中罗丹明B的吸附

以壳聚糖(CS)、碳纳米管(CNTs)和海藻酸钠(SA)为主要原料,制备了环境友好型的复合吸附材料——CS-CNTs-SA,并采用SEM和FTIR技术对复合吸附材料进行表征。考察了pH值、吸附剂的用量、吸附动力学和吸附等温线等因素对其吸附废水中罗丹明B效果的影响,并对CS-CNTs-SA进行疲劳试验。实验结果表明:在室温、溶液p H为1.0、罗丹明B的初始浓度10×10-6mol/L、CS-CNTs-SA的投放量为12mg/m L、吸附时间24 h的条件下,CS-CNTs-SA吸附去除罗丹明B的效果达到最佳;Langmui和Freundlich吸附等温方程都能较好地描述CS-CNTs-SA对罗丹明B的吸附行为;CS-CNTs-SA可以多次吸附处理罗丹明B废水,且仍具有一定的吸附性能。
     

CS-CNTs-SA复合材料的制备及其对水中罗丹明B的吸附

以壳聚糖(CS)、碳纳米管(CNTs)和海藻酸钠(SA)为主要原料,制备了环境友好型的复合吸附材料——CS-CNTsSA,并采用SEM和FTIR技术对复合吸附材料进行表征。考察了pH值、吸附剂的用量、吸附动力学、吸附等温线等因素对其吸附废水中罗丹明B效果的影响,并对CS-CNTs-SA进行疲劳试验。实验结果表明:在室温、溶液pH值为1.0、罗丹明B的初始浓度为10×10-6 mol·L~(-1)、CS-CNTs-SA的投放量为12mg·mL~(-1)、吸附时间为24h的条件下,CS-CNTsSA吸附去除罗丹明B的效果达到最佳;Langmui和Freundlich吸附等温方程都能较好地描述CS-CNTs-SA对罗丹明B的吸附行为;CS-CNTs-SA可以多次吸附处理罗丹明B废水,且仍具有一定的吸附性能。     

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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