Fenton氧化处理颜料中间体生产废水的生化尾水

颜料中间体生产废水的生化尾水的水质虽已达到园区污水处理厂的接管标准,但由于难降解有机物的残留,使得园区污水处理厂生化系统不能稳定运行。为寻求解决方法,采用Fenton氧化法对颜料中间体废水的生化尾水进行深度处理,通过正交试验和单因素试验,考察初始反应pH、H2O2投加量、摩尔比n(H2O2)∶n(Fe2+)和反应时间对废水化学耗氧量(COD)、紫外吸光度(UV254)和色度去除率的影响。结果表明:最佳反应条件为初始反应pH 4,30%H2O2投加量1 mL/L,n(H2O2)∶n(Fe2+)=5∶1,反应时间3 h,COD去除率可达46%,UV254去除率可达84%,色度去除率可达95%。根据实际工程应用,深度处理的药剂成本为2元/t废水,去除COD的成本为22.7元/kg。针对较难二次生化处理的废水先进行Fenton氧化预处理,提高其可生化性后,再与其他易生化处理的废水一同处理,既节省成本,又利于水质的稳定达标。     

Fenton化学氧化法深度处理造纸废水的试验研究

采用Fenton化学氧化法对造纸废水进行深度处理,考察了H2O2和Fe2+浓度、pH、反应时间等因素对COD去除率的影响。在H2O2(3%)投加量为13.33mL/L,FeSO4.7H2O投量为0.9g/L,pH为5,反应15min后静置5min的条件下,初始COD为290mg/L,色度为50倍的造纸生化出水的COD去除率可达到72%。结果表明,Fenton化学氧化法深度处理该废水可以取到很好的效果。     

Fenton试剂法处理焦化废水的研究

本文对Fenton试剂处理焦化废水进行了研究,通过探讨H2O2投加量、[Fe2＋]/[H2O2]、pH值、反应时间等因素对COD去除率的影响,确定了以下操作条件：H2O2投加量158mmol/L,[Fe2＋]/[H2O2]=1：10,pH=3,反应时间为30min。在上述条件下,焦化废水COD去除率达89.9%。在此基础上,研究了H2O2投加方式对处理效果的影响。结果表明,H2O2采用分批投加时,会改善处理效果。     

Fenton试剂处理磺胺甲恶唑制药废水的研究

用Fenton试剂处理磺胺甲恶唑废水,以测定COD值为主要指标,研究了Fe2+的投加量、H2O2投加量、p H值、H2O2投加次数和反应时间等因素对处理磺胺甲恶唑废水的影响.结果表明:对于COD质量浓度为1 166.6mg/L的磺胺甲恶唑模拟制药废水,当Fe2+的投加量为0.2 mol/L,H2O2投加量1.0 mol/L,p H值为3,H2O2投加次数4次,反应时间为60 min的条件下,COD去除率达到最大,为88.9%.说明Fenton高级氧化体系对此类难以生物降解的抗生素制药废水处理的效果很好.     

光/电Fenton耦合处理退浆废水中聚乙烯醇

采用光/电Fenton耦合技术处理退浆废水中难生物降解的高分子物质聚乙烯醇(PVA),考察FeSO4.7H2O投加量、H2O2投加量、初始pH、电流强度、反应时间对PVA降解效果的影响。结果表明:光/电Fenton耦合技术处理退浆废水中聚乙烯醇的最佳反应条件为:pH 4,FeSO4.7H2O投加量14.2 mmol/L,H2O2投加量ρ(H2O2)/COD=2.3,恒压电流强度1 A,反应时间120 min。在此条件下,化学耗氧量(COD)去除率达91%;总有机碳(TOC)去除率达80%;生化耗氧量(BOD)与COD比值从原水的0.007提高到0.9。     

H_2O_2/Fe~(2+)和H_2O_2/Fe~(2+)/UV对废水焦糖色去除

为去除废水中的焦糖色素,采用H2O2/Fe2+和H2O2/Fe2+/UV对焦糖色素去除进行研究.实验考察了H2O2和Fe2+投加量、pH值、反应时间对焦糖色素去除率的影响,在此基础上进一步考察了H2O2/Fe2+/UV对焦糖色素去除效果.结果表明,对于芬顿试剂,H2O2与Fe2+反应的化学计量数为8;pH值为3,反应时间30 m in时,焦糖色的去除效果较好,去除率达到83%.采用H2O2/Fe2+/UV可进一步提高焦糖色的去除效果,去除率可提高到90%.因此采用H2O2/Fe2+或H2O2/Fe2+/UV法获得良好的焦糖色去除效果.     

Fenton氧化法去除造纸法再造烟叶废水COD的研究

采用Fenton 氧化法深度处理经过生化处理后的造纸法再造烟叶废水,研究了H2O2用量、Fe2+用量、反应时间以及初始pH因素对CODCr去除率的影响,确定了最佳试验条件.结果表明,n(H2O2)∶n(Fe2+)为6∶1,H2O2用量36.75 mmol/L,Fe2+用量6.125 mmol/L,搅拌反应时间30 min,初始pH 为3时,CODCr去除率达最大值为72.26%,再添加PAM进行絮凝沉降处理,最终出水水质CODCr为60 mg/L.     

类Fenton试剂+催化剂A氧化处理皮革废水实验研究

以河南省某皮革厂二沉池出水为研究对象,研究了类Fenton试剂+催化剂A氧化法对皮革废水的处理效果及影响因素.通过试验,探讨了H2O2与Fe2+两者的投配比、反应时间、PAM的投加量、曝气时间等相关因素对COD去除率的影响.结果表明:2.5%H2O2与10%FeSO4·7H2O的最佳摩尔比是1∶1,最佳投配量分别是9.6mL和22.0mL;0.6%PAM最佳投加量为0.8mL,反应时间为1.5h,曝气时间为10min.经过处理,出水COD控制在80mg·L-1以内,效果显著,达到《污水综合排放标准》(GB8978-1996)皮革废水一级标准.     

Fenton法处理高浓度树脂废水

采用Fenton氧化法预处理树脂废水,通过正交试验和单因素试验,考察了Fe^2＋用量、H2O2投加量、pH值和反应时间等因素对Fenton试剂处理效果的影响,确定了最佳工艺条件.结果表明：在最佳工艺常温下,pH=2,30%H2O2投加量为52 mL/L（分三次投加）,Fe^2＋/H2O2摩尔比1/12.5,反应时间2 h,此时CODCr去除率可达82%以上,处理效果较好,可应用于高浓度树脂废水的预处理.     

Fenton试剂预处理聚酯树脂废水的研究

运用Fenton试剂处理工业废水（起始CODC r=60220 mg/L）,通过改变H2O2投加量、Fe2＋投加量及废水初始pH值等参数,对某聚酯树脂废水进行Fenton试剂氧化正交试验。并在正交试验的基础上进行单因素试验,确定Fenton氧化的最优工艺参数。试验结果表明,在正交试验因素所选的水平中,三个影响因素的大小顺序为：H2O2投加量〉废水初始pH值〉Fe2＋投加量。在室温条件下,H2O2/CODC r=2（质量比）,[Fe2＋]/[H2O2]=1/10（质量比）,pH=2.9,反应2h后,废水的CODC r去除率可达74.23%。废水的BOD5/COD值由起使0.352提高至0.582（预处理后）,可生化性得到较大提高,有利于后续的生化处理。     

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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