两性木素絮凝剂用于模拟染料废水的脱色处理研究

以木质素磺酸钙为原料制备了两性木素絮凝剂LSDC,并将LSDC用于活性艳蓝X-BR、活性黄X-R、活性紫K-3R、活性黑K-BR等多种模拟染料废水的脱色处理.讨论了LSDC投加量和溶液pH值对不同染料脱色效果的影响.实验结果说明,LSDC对各染料的脱色率在投加量0～150 mg/L范围内脱色率随投加量增大而增大,同时投加量增加可能引起废水CODCr的提高,需控制适当的投加量范围,在投加量不大时不会造成二次污染.染料所含活性基因数目和种类对脱色效果也有较大影响,对实验中涉及的几种活性染料,活性基团数目越多,絮凝脱色量越小.在pH 4～8的范围内,活性艳蓝X-BR、活性黄X-R、活性紫K-3R、活性黑K-BR的脱色率分别可达83.7%,99.39%,98.25%和82.13%.     

非均相UV/Fenton法降解活性艳红染料废水的试验

目的研究非均相UV/Fenton法对活性艳红X-3B染料废水的氧化降解效果,确定非均相UV/Fenton法处理染料废水的工艺条件.方法在自制光反应器中,采用非均相UV/Fenton氧化法对活性艳红X-3B模拟染料废水进行处理,通过试验研究分析H2O2投加量、催化剂投加量、p H值、反应时间等影响因素对非均相UV/Fenton氧化法降解活性艳红X-3B染料废水效果的影响.结果当H2O2投加量为理论投加量,催化剂投加量为1g/L,初始p H=4,常温下反应60 min时,活性艳红X-3B的脱色率和COD的去除率分别达到92.8%和72.3%.结论非均相UV/Fenton氧化法处理活性艳红X-3B染料废水的效果较好,其中H2O2投加量和催化剂投加量对处理效果影响较大.非均相UV/Fenton氧化法拓宽了p H值适用范围.     

两性木素絮凝剂用于模拟染料废水的脱色处理研究

以木质素磺酸钙为原料制备了两性木素絮凝剂LSDC，并将LSDC用于活性艳蓝X-BR、活性黄X-R、活性紫K-3R、活性黑K-BR等多种模拟染料废水的脱色处理。讨论了LSDC投加量和溶液pH值对不同染料脱色效果的影响。实验结果说明，ISDC对各染料的脱色率在投加量0～150mg／L范围内脱色率随投加量增大而增大，同时投加量增加可能引起废水COD。的提高，需控制适当的投加量范围，在投加量不大时不会造成二次污染。染料所含活性基因数目和种类对脱色效果也有较大影响，对实验中涉及的几种活性染料，活性基团数目越多，絮凝脱色量越小。在pH4～8的范围内，活性艳蓝X-BR、活性黄X-R、活性紫K-3R、活性黑K-BR的脱色率分别可达83．7％，99．39％，98．25％和82．13％。     

Fenton试剂处理染料废水的试验

采用Fenton试剂处理碱性紫染料废水,考察pH值、H2O2和Fe2 投加量、反应温度等对脱色效果的影响.实验结果表明,当碱性紫的初始浓度为50 mg.L-1,反应温度为25℃,pH值为3.0,H2O2投加量为0.5Qth,n(H2O2)∶n(Fe2 )为10∶1的条件下,脱色率可达98%以上.在相同条件下,Fenton试剂对甲基橙和亚甲基蓝染料废水均取得满意的处理效果.     

光电Fenton氧化法处理染料废水的试验

目的研究光电Fenton氧化法处理染料废水的脱色效果,确定处理染料废水的最佳工艺条件.方法在自制的电化学反应器中,通过光电Fenton氧化法处理染料废水试验,确定初始p H值、槽电压、曝气量、Fe2+投加量和支持电解质投加量对染料脱色效果的影响;通过Design Expert软件建立数学模型,最终拟合最优反应条件,应用响应曲面分析法模拟分析初始p H值、槽电压和曝气量3个因素在染料废水脱色过程中的显著性和交互性.结果响应曲面分析法确定的最佳脱色工艺条件为:p H值4.25、槽电压15.73 V、曝气量0.25 L/min,在此条件下,脱色率为97.186 9%;各因素对体系脱色效果影响大小为:p H值槽电压曝气量;各因素交互作用对体系脱色效果影响大小为:槽电压p H值p H值曝气量槽电压曝气量.结论光电Fenton氧化法处理染料废水的脱色效果较好.     

负载CeO_2的活化粉煤灰的制备及对酸性红B的脱色

采用H2SO4对粉煤灰进行活化处理,再经液相沉淀法负载CeO2,制得活化粉煤灰/CeO2复合材料.EDS分析结果证实了活化粉煤灰/CeO2复合材料的形成.利用活化粉煤灰/CeO2复合材料对酸性红B模拟染料废水进行脱色处理,研究了各种反应条件对脱色效果的影响,并对脱色机理进行了探讨.实验结果表明:粉煤灰经质量分数为50%的H2SO4活化后,1g活化粉煤灰负载CeO20.25g,焙烧温度为500℃,投加灰量为10g/L,搅拌反应120min,对于初始质量浓度为20mg/L,pH=1的酸性红B模拟废水,在日光照射下脱色率达93.2%,在紫外光照射下脱色率可达97.5%.说明活化粉煤灰/CeO2复合材料对染料废水有很好的脱色效果,在造纸废水、纺织印染废水的处理上有良好的应用前景.     

废旧锌锰电池在印染废水处理中的应用

分别以废旧电池中回收的锰氧化物和MnO2为处理剂,对活性艳蓝模拟的染料废水进行了脱色实验。实验结果表明,初始的pH是影响脱色效率的主导因素,当pH=2,投加量为85 mg/L,反应时间t=33 min时,分别通过两个处理剂处理后废水的脱色率都在70%以上,而且通过30 min反应后的紫外扫描发现,锰氧化物更有利于染料废水的脱色,为废旧电池资源化利用提供了新途径。     

交联壳聚糖膜制备及对酸性大红染料吸附作用

以采用流延法制备得到的交联壳聚糖膜作为吸附剂,对酸性大红染料废水进行吸附脱色处理,考察了吸附时间、pH值、吸附剂投加量和酸性大红起始浓度等对吸附脱色效果的影响。在吸附时间为60min,pH值为4．5,1L废水中壳聚糖投加量为1．25g时,交联壳聚糖膜对酸性大红的脱色效果良好,吸附率可达95．46％。对实验数据运用相关数学模型拟合,结果表明,该等温吸附平衡同时符合Freundlich或Langmuir模型,线性相关回归系数较好（R^2均高于0．98）;吸附过程动力学符合二级反应,线性相关系数良好（R^2〉0．99）。     

多羟基亚铁络合物还原转化活性黑5的实验

通过调控反应条件,制备了高活性的亚铁羟基络合物(FHC),以活性黑5(RB5)为目标污染物研究了FHC还原转化偶氮染料的反应性能.探讨了FHC对RB5还原脱色的影响因素,包括亚铁结构形态、FHC的投加量、初始pH值、溶解氧等,结果表明结构态亚铁具有很强还原反应活性,亚铁投加量89.6 mg·L-1,染料初始质量浓度为1...     

活化粉煤灰／H2O2体系对酸性红B的脱色处理

用H2SO4活化后的粉煤灰联合H2O2对酸性红B模拟染料度水进行脱色处理,研究了各种反应条件对脱色效果的影响,并对吸附机理进行了探讨。结果表明：经H2SO4活化的粉煤灰联合H2O2稀溶液,在灰的加入量为5g/L,H2O2的加入量为1.5mL/L,pH=1-5,反应时间为120min的条件下,对初始浓度为10mg/L的酸性红B染料废水的脱色率达97.5%,溶液近无色。对于较大浓度的染料,适当增加灰的投加量,脱色率仍可达95%以上。说明活化粉煤灰一过氧化氢法是处理染料废水的一种有效方法。     

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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