一种高效的强酸性镀锡废液回收处理新工艺(英文)

阐述了一种未见报道的能对强酸性镀锡废液进行大规模集中回收处理的新工艺。这套工艺是在对废水进行预热的条件下,利用硫酸钠和聚丙烯酰胺作为聚沉剂和絮凝剂,便可在短时间内对大量的强酸性废液进行高效处理,最后经过压滤便可得含锡量高的锡泥。     

钻井废液无害化处理技术的研究

通过生物处理技术对钻井废液进行室内试验,研究了钻井废液中有机污染物生物降解的可行性、处理钻井废液的最佳条件和处理钻井废液的工艺运行参数,为进一步试验打下了基础。     

染黑废液的处理研究

染黑工序所使用的染料BLACK使用一段时间后,其活性力下降,不能继续使用,如果作为废液直接排掉,会严重污染环境,给自然界和人类带来危害。采用"强脱色剂-絮凝沉淀"两步法来处理染黑废液,通过加入强除黑剂,进行初步脱色后,再加入硫酸亚铁沉淀剂和絮凝剂进行沉淀,最终实现脱色。研究了用"强脱色剂-絮凝沉淀"两步法对染黑废液进行处理的最佳工艺条件。结果表明:脱色率达98%,,COD去除率为96%,,达到了国家排放标准。其脱色效果明显,是值得推广的一项实用技术。     

化学实验室常见无机废液净化处理方法研究

目前化学实验中产生的废液,不经处理便直接排入下水道的现象较为普遍,对水质和环境造成严重污染．首先将无机废液分成3类,一类含酸、碱废液;二类含有害重金属废液;三类含有害的阴离子废液．然后研究了这3类废液简单有效的处理方法,对废液和处理后的水质进行了分析．处理后的水质达到国家污水排放标准．     

移动式放射性废液处理工艺研究

随着核工业的发展,产生了大量的放射性废液。放射性废液必须经过处理达标后才能排放进入环境。在大型核设施运行单位一般均设置有固定式工艺的放射性废液处理装置。一些核技术应用单位产生的少量零星废液,以及固定式装置不便处理和无法处理的废液、核应急、核设施退役等领域,移动式放射性废液处理装置就显得尤为重要。该文通过对现有的国内外移动式放射性废液处理工艺进行研究,以期为移动式放射性废液的处理工艺的研究和开发提供借鉴和参考。     

电解法处理不锈钢酸洗废液机理的研究

通过对常用于清洗不锈钢氧化皮的含有氢氟酸酸洗废液进行电解,探讨了在酸性废液中金属电沉积的条件及阳离子表面活性剂对析氢超电势的影响,初步找到了电解法处理酸洗废液再生利用的方法;这对解决国内外至今尚未解决的排放污染问题有较大的实用价值。     

臭氧氧化法处理糖蜜酒精废液的工艺条件探讨

进行了影响臭氧氧化法处理糖蜜酒精废液效果的多因素正交试验,探讨了pH值、处理气液比、处理时间和反应温度对CODcr和色度去除率的影响,得到了臭氧氧化法处理糖蜜酒精废液的最佳工艺条件组合:⑴废液的初始pH值为11.50;⑵处理气液比为0.270 mg.L-1;⑶处理时间为30 m in;⑷反应温度为35℃。在此工艺条件下,废液的CODcr去除率为26.4%,色度去除率达92.8%,脱色效果好。废液的初始pH值对CODcr去除率影响显著,对色度去除率影响极显著。     

含铜蚀刻废液的综合利用：中和沉淀后母液的处理工艺探讨

酸性蚀刻废液与碱性蚀刻废液混合沉淀铜后，母液中含有大量的氯化铵，少量的铜离子．用水合肼还原除去铜离子后，回收所得氯化铵溶液可直接用于蚀刻液的生产．通过对处理工艺探讨，找到了处理母液的最佳方法．     

浅谈印制线路板生产中的废水处理及其在清洁生产中的应用

分析了以印制线路板在生产过程中产生的工业废水的来源及其水质特点,在此基础上,以微蚀刻废液再生回用技术和废退锡水回收技术为例,从技术上阐述了将处理这些废水的工艺应用于清洁生产,实现废水处理与清洁生产相融合的方法,及其在工业中推广的价值和意义。     

电解法处理不锈钢酸洗废液

目前 ,国内外处理含氢氟酸不锈钢酸洗废液的方法是化学法 ,即使 F- 以某种盐类析出 ,然后采用酸碱中和的方法将废液直接排放 .国内大中小企业几乎均采用此方法 ,显然这种处理方法对环境会造成严重污染 .本项目借鉴电解原理 ,对废液进行电解处理 ,通过筛选合适的电极及向废液中添加活性剂 ,最终达到在酸性废液中只有金属离子在阴极上析出 ,而不使 H+还原析出 .这样 ,若进一步向处理后的废液中补加酸 ,清洗液将可继续利用 ,解决了排放污染问题 .因为 F-氧化析出电位很高 ,故电解过程中不会有 F- 的氧化析出消耗问题 ,其始终存在于废液中 .不…     

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

正~~