ClO2催化氧化处理土霉素废水处理站二级出水

以土霉素废水处理站二级出水为研究对象,二氧化氯(ClO2)为氧化剂,以自制活性炭负载铜氧化物(CuOx-AC)催化剂进行ClO2催化氧化试验研究。试验结果表明,ClO2催化氧化最佳反应条件为初始反应pH值为7.0、ClO2投加量为0.24g/L(折纯,质量浓度)、催化剂投加量为50g/L(质量浓度)和反应时间为30min。在此条件下,废水COD的质量浓度由472.7～523.4mg/L降至301.2～340.1mg/L,COD去除率在35%左右,但废水B/C值由0.04～0.07提高至0.21～0.24,可生化性显著提高,为进一步采取生化处理工艺实现废水达标排放奠定了基础。     

催化氧化氨基C酸染料中间体废水的研究

研究了Cu/r-Al2O3单组分催化剂和Ni-Zn/r-Al2O3双组分催化剂两种催化氧化体系.通过对废水pH、反应时间、ClO2投加量、催化剂投加量、初始浓度等工艺条件的考察,确定Ni-Zn/r-Al2O3催化氧化处理氨基C酸染料中间体模拟废水的最佳工艺条件:初始pH,ClO2投加量10 mL,催化剂投加量3.0 g,反应20 min.在该条件下,COD和浓度去除率分别为65.2%和86.5%,为该工艺处理氨基C酸工业废水提供了实验依据.     

活性炭负载铈催化臭氧氧化去除水中邻苯二甲酸二甲酯的研究

用浸渍法在活性炭上负载铈制备催化剂（Ce/AC）,并用XRD和SEM对其进行了表征．考察了Ce负载量、催化剂投加量对Ce/AC催化臭氧氧化降解邻苯二甲酸二甲酯（DMP）的影响．结果表明,Ce/AC催化臭氧氧化降解DMP的优化参数是催化剂投加量1.5 g/L,Ce的负载量0.2 %．在优化条件下,Ce/AC加入有利于催化臭氧氧化DMP过程中TOC的去除．质量浓度30 mg/L（pH=5.0）DMP反应60 min后的TOC去除率由以AC为催化剂的48 %提高到68 %,而单独臭氧氧化过程中TOC去除率仅有22 %．     

多相稀土催化臭氧氧化法降解印染废水

利用多相稀土催化臭氧氧化法对浓度为200 mg.L-1的1 L模拟印染废水进行了降解实验。以稀土催化剂投加量、温度、反应时间及pH值为影响因素,以COD去除率为考察指标来优化实验参数。结果表明:该工艺的最佳反应条件为pH=2,稀土催化剂投加量为5 g,反应时间为60 min,温度为60℃。该方法应用于废水处理,效果较好。     

肼类推进剂废水的催化氧化处理研究

研究了肼类推进剂废水的催化氧化处理技术，对催化剂的种类、用量等工艺条件进行了实验研究．最佳工艺参数为：催化剂为唐山TW-400号活性炭；活性炭投配比为20-40g／L废水；空气投配量为lOOL／h·L废水；反应时间为3-4h．     

微波强化ClO_2催化氧化处理活性艳黄染料废水

以γ-Al2O3为载体,采用浸渍-沉淀法制备了CuOn–La2O3/γ-Al2O3催化剂。探讨了ClO2浓度、微波辐照功率及辐照时间、催化剂用量、体系pH值、体系温度及不同工艺对活性黄染料废水去除效能的影响。结果证实了微波强化ClO2催化氧化法的高效性和可行性。研究表明：微波强化ClO2催化氧化法能够有效去除水中活性艳黄染料,缩短反应时间,减少催化剂用量,拓宽pH值使用范围。对于200mg/L的染料废水,其处理的最佳工艺条件为：微波辐照功率400W,辐照时间1.5min,催化剂CuOn–La2O3/γ-Al2O3加入量70g/L,ClO2浓度80mg/L,体系pH值为7,在此工艺条件下,脱色率达92.24%。对比不同处理工艺,微波强化ClO2催化氧化法能够显著地提高水中活性艳黄染料的去除效果,为染料废水的处理提供了一种行之有效的新方法。     

ClO_2氧化处理土霉素制药废水的研究

ClO2因其优良的性能被主要应用于给水处理领域.土霉素制药废水难以生物降解,利用ClO2强氧化性对其进行处理研究.以废水COD和BOD5为评价指标,考察了常温常压下ClO2的投加量、氧化反应时间和pH值等主要因素对制药废水处理效果的影响.在单因素试验的基础上采用正交试验方案,确定了最佳工艺条件.研究表明,用ClO2处理COD值为4 710 mg/L的土霉素制药废水时,ClO2投加量为1 500 mg/L,氧化反应时间为50 min,最佳pH值为6.6.在此条件下,COD的去除率为52.2%,处理后的BOD5/COD由原来的0.17提高到0.52.与用Fenton试剂氧化处理的效果相比较,虽然COD的去除率不如后者高,但处理时的pH值趋于中性,节省了大量调节用酸,而且可生化性大幅提高,处理后生成的难降解沉淀大大减少,脱色、除味效果好.     

活性炭活化过硫酸盐处理含酚废水的实验研究

以有机污染物中常见的苯酚为目标污染物,研究活性炭活化过硫酸盐高级氧化技术处理含酚废水。考察含酚废水浓度、温度、pH、药品投加量、反应时间等因素对处理效果的影响,探究反应机理。结果表明,当水浴震荡时间为40 min,活性炭与过硫酸纳(PS)投加量分别为0.15 g/L、0.45 g/L,初始pH为6时,活性炭活化PS对苯酚去除率为80.81%;相较于活性炭单独去除苯酚效率的39.50%和PS单独去除苯酚效率的22.90%,有较大提高,说明活性炭对过硫酸钠氧化体系的催化效果明显。     

铁型催化剂对臭氧氧化甲基橙的催化效能

以模拟染料废水甲基橙(MO)溶液为目标物,研究了Fe2+、Fe3+均相催化臭氧氧化及负载型铁氧化物非均相催化臭氧氧化对MO的去除特性,并探讨了在非均相催化剂活性炭负载Fe2O3(Fe2O3/AC)、活性氧化铝负载Fe2O3(Fe2O3/Al2O3)催化臭氧氧化体系中pH值、催化剂投加浓度、臭氧浓度、MO初始浓度等工艺参数的作用规律.结果表明,Fe2+、Fe3+、Fe2O3/AC、Fe2O3/Al2O3的加入均能提高MO的脱色率和COD去除率,且Fe2O3/AC、Fe2O3/Al2O3的催化效果更为显著;当Fe2O3/AC、Fe2O3/Al2O3的投加浓度为1.0 g/L,臭氧浓度为15.0 mg/L,MO初始浓度为25.0 mg/L、pH值为5.0时,30 min时Fe2O3/AC、Fe2O3/Al2O3催化臭氧体系降解MO的脱色率和COD去除率分别为89.26%、48.45%和80.34%、38.41%.     

活性炭纤维、二氧化氯及其联用工艺去除 2-MIB

采用液液萃取与气相色谱-质谱联用技术研究二氧化氯、活性炭纤维及二氧化氯与活性炭纤维联用3种方法对2-MIB的去除效果,考察二氧化氯和活性炭纤维投加量、溶液pH和底物初始质量浓度对目标物去除效果的影响。研究结果表明:ClO2单独去除的最佳投加量为8 mg/L,pH7时效果较好。ACF最佳投加量和最佳pH分别为20 mg/L和6.14。2-MIB的去除率都随其初始质量浓度增大而降低。ACF与ClO2联用工艺中二者投加量分别为1 mg/L和14 mg/L时,2-MIB的去除率可达88.2%,比单独吸附去除效果提高4.6%,同时降低30%的ACF投加量,此外,联用工艺对于处理低质量浓度的2-MIB更为有效。ACF吸附2-MIB符合伪二级反应动力学模型,粒子内部扩散是吸附过程的主要控制步骤,吸附可能是个复杂的非均相固液反应。     

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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