碳钢渣处理煤矿酸性废水及其去除机理

根据阳泉市山底河流域煤矿酸性废水的特点配制了低pH值、高Fe²⁺和Mn²⁺质量浓度的煤矿酸性废水，利用碳钢渣对其进行处理，研究了碳钢渣对去除率的影响因素，并且着重探讨了去除机理。结果表明：碳钢渣对Fe²⁺去除率最高可达98.72%,对Mn²⁺的去除率最高仅为39.79%;处理煤矿酸性废水后碳钢渣表面生成了新物质Fe(OH)₃,但没有生成含Mn的新物质，证明碳钢渣对Fe²⁺的去除以化学反应为主，对Mn²⁺的去除以吸附作用为主。     

酸碱度和铁离子对毒砂生物氧化作用的影响研究

毒砂的氧化作用会产生富含As的酸性矿山废水(AMD)引起了广泛关注,但p H和Fe2+离子对毒砂生物氧化作用的影响还不清楚。利用从大宝山AMD培养得到的氧化亚铁硫杆菌(A.f.)和毒砂进行初始p H2.00、p H3.00和p H3.50为期30 d的不含Fe培养基有菌氧化、含Fe培养基无菌氧化和含Fe培养基有菌氧化实验,通过测定实验过程溶液的总As离子、Fe2+含量和p H值,获得如下结论:1不含Fe培养基有菌氧化过程,初始p H越低,实验结果溶液As离子质量浓度越高,初始p H2.00比初始p H3.50的溶液中As离子质量浓度要高大约15倍,即低p H可促进毒砂的微生物氧化作用。2含Fe培养基会使毒砂生物氧化过程p H保持在4.0以下进行,促进毒砂氧化,提高释放的As离子质量浓度。在AMD中加入一定的碱性物质来提到p H值,可降低Fe2+质量浓度,抑制毒砂的生物氧化作用,降低As离子的含量。     

反应条件对钢渣除磷的影响

为了更好地利用钢渣具有较大的比表面积、孔隙率和密度,易于固液分离且不易形成二次污染等特点来处理废水,确定反应条件对钢渣除磷效果的影响,对污水中磷的初始浓度、钢渣用量、钢渣粒径、温度、p H值等因素进行了研究.研究结果表明,磷的初始浓度越大,反应平衡得越快,对除磷总量影响比较显著;随着钢渣用量增加、钢渣粒径减小,磷去除量显著增大;钢渣对磷的去除适宜在偏酸性条件下进行,p H=4时去除率最高;20~35℃条件下温度对钢渣处理效果的影响较小.     

含Fe、Mn酸性矿井水水质特征及处理工程实践

含Fe、Mn酸性矿井水是采煤过程产生的一种污染及危害极大的废水。本文介绍了毕节地区典型煤矿含Fe、Mn酸性矿井水的水质特征及处理工程实践。文中介绍的处理工艺处理效果达到相关排放标准及回用标准要求、投资省,值得推广和应用。     

钢渣—赤泥复合处理含铬废水的研究

以钢渣和赤泥为吸附剂,研究处理模拟废水中的铬。对钢渣和赤泥投加量的质量比、粒径、溶液初始p H值、反应温度以及振荡时间对吸附效果的影响进行研究,结果表明最佳吸附条件为:赤泥与钢渣的质量比为3∶2,粒径选择80目,废液与吸附剂的液固比为20∶1,振荡时间为20 min,反应温度为25℃,溶液的p H值为2。     

β-环糊精交联聚合物对两种重金属处理研究

采用经改性的β-环糊精对重金属废水进行处理,分析了其对Fe2+、Cu2+、两种重金属离子的去除效果,并研究了β-环糊精交联聚合物投加量、温度、反应时间、p H值等因素对实验效果的影响.实验结果表明,β-环糊精的交联聚合物对Fe2+的去除率可以达到95.8%,对Cu2+的去除率为25.9%.     

钢渣吸附剂的制备及吸附性能研究

对电炉钢渣进行破碎、筛分等处理后制备成钢渣吸附剂,在实验室中用该吸附剂处理合铬废水,并在不同条件下对它的吸附性能进行了分析,得到了最佳的吸附条件。实验结果表明：处理后废水中Cr（Ⅵ）的浓度低于1．0mg／L,可以达标排放。利用钢渣吸附剂处理含铬废水,可以以废治废,变废为宝,具有较好的环境效益和经济效益。     

人工湿地处理酸性煤矿废水的机理研究及展望

分析了酸性煤矿废水的形成及水质特点,阐述了人工湿地的处理机理,提出了利用人工湿地处理酸性煤矿废水的可能性。     

二段中和法处理酸性矿山废水

采用石灰与氢氧化钠二段中和法处理酸性矿山废水.研究结果表明:用石灰调节废水pH至5时,Fe,Mn,Zn的去除率分别为14.14%,5.94%和13.91%;采用氢氧化钠二段中和后,当废水pH为10.20,曝气流量为50mL/min,反应时间为20 min时,废水中铁、锰、锌去除率均达到99.7%以上,其废水中TFe,Mn2+和Zn2+残留质量浓度分别为80,810,30μg/L,均低于国家污水综合排放标准(GB 8978-1996).石灰一段中和渣为石膏(CaSO4·2H2O);氢氧化钠二段中和渣为锰锌铁氧体(Fe2Mn0.5Zn0.5O4·nH2O)和四氧化三铁(F03O4);石灰与氢氧化钠二段中和法与石灰中和法相比较,二段中和渣量少,二段中和渣具有综合利用价值.     

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.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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