微电解法预处理木质素废水的实验研究

以人造板厂生产废水为实验对象,探讨利用微电解法处理木质素废水。结果表明在适当的条件下,微电解是一种有效的处理该类废水的方法,COD去除率可达89.2%。微电解处理时废水的pH对处理效果的影响最大,其次还有铁炭比和反应时间等。最佳反应条件为:进水pH值在3左右,最终出水pH值调为8～9,温度为室温,铁炭比为1:1(100ml废水用铁量为5g),反应的最适时间为40分钟。     

阿奇霉素废水铁炭微电解研究

阿奇霉素废水成分复杂,具有pH值高、色度深、COD高、BOD低、难降解的特点,采用铁炭微电解技术对阿奇霉素废水进行预处理,研究了各因素对其处理效果的影响。结果表明:在反应温度为25℃、铁炭质量比为3∶1、入水pH值为4、铁屑投加量为0.45g/L、反应时间为2.0h的条件下,COD的平均去除率达到53.21%。     

铁炭内电解法处理印染废水的研究

针对印染废水组分复杂、难以生物降解等问题,采用铁炭内电解法对其进行预处理.分析了铁炭质量比、废水pH值和反应时间对铁炭内电解法处理印染废水效果的影响.结果表明,在印染废水pH值为4、铁炭质量比为3.3及反应时间为100 min时,铁炭内电解法对高浓度印染废水的色度和CODCr的去除率分别达到82.0%和59.6%.     

微电解法处理中药废水色度的研究

依据微电解的基本原理,采用铁炭法对中药废水色度处理进行研究。考察了铁炭质量比、进水pH值和水力停留时间对去除效果的影响。实验结果在铁炭质量比为2∶1,进水pH为5.0,废水在微电解柱中的停留时间为120min时,色度去除效果最佳,去除率达到95%以上。     

铁碳微电解法预处理抗生素废水的影响因素

采用铁炭微电解法顸处理抗生素废水,研究了进水pH值、反应时间等因素对COD去除率的影响。结果表明:铁炭微电解法预处理制药废水最佳进水pH值为3,适宜的反应时间为120 min,在此条件下,COD去除率最高可达68.7%,为后续的生物处理提供了有利的条件。     

Fenton试剂处理拉开粉废水的影响因素

采用Fenton试剂对橡胶装置所排拉开粉废水进行了处理,探讨了pH值、H2O2加入量、反应时间及反应温度对废水BX去除率的影响。结果表明,在pH为3．0—3．5,30％H2O2加入量为7．5mL／L,反应时间1h,反应温度40-45℃条件下,BX总去除率可达80％以上。     

硫酸烧渣处理含铬废水

含Cr^6＋废水的处理常采用化学还原法,成本较高。本文进行了硫酸烧渣处理含铬废水的实验,对硫酸烧渣的加入量和粒度、废水pH值、反应时间和反应温度对六价铬去除率的影响。实验表明,当含Cr^6＋废水的pH值为2～3时,硫酸烧渣加入量2．0g、反应时间35min、硫酸烧渣粒度0．076mm反应温度300℃时,硫酸烧渣对六价铬的去除率较高。     

铁/炭微电解-Fenton氧化技术处理1,2,4酸生产废水

以6硝(6硝基1,2重氮氧基萘4磺酸)生产过程中产生的1,2,4酸废水作为研究对象,将铁/炭微电解和Fenton氧化技术结合进行废水处理,研究了微电解的pH值、反应时间、反应温度、铁炭质量比、活性炭用量的影响以及Fenton氧化的pH值和H2O2用量,并进行了处理工艺的经济性分析。通过单因素实验确定1,2,4酸废水处理的工艺条件为铁碳微电解的pH值为1时,铁碳质量比为3〖DK〗∶1,反应3 h,过滤,调pH值为3,添加废水体积2.5%的H2O2(质量分数为30%),反应1 h,电石渣调pH值7~8,过滤。该工艺对废水COD的去除率可提高到95%以上,废水处理成本5.4元/m3。     

粉煤灰在皂素废水处理中的应用

通过分析粉煤灰在不同的投加量、pH值和反应温度下,对皂素废水处理前后的COD和色度变化,得出粉煤灰处理皂素废水的最大COD去除率可达56．35％,此时的投加量为10g/L,pH值为7,反应温度为20℃。表明粉煤灰处理皂素废水能够达到一定效果,在生产生活中可以广泛应用。     

微波强化铁屑─焦炭处理活性艳红X-3B废水

以活性艳红X-3B为主要对象，在传统的内电解处理法的基础上，利用微波使铁炭床再生，强化处理染料废水，并初步探讨铁炭内电解和微波强化的作用机理。实验结果表明，在铁炭体积比为4：3，铁屑粒径为2-4mm，染液pH为5，反应时间为90min时，处理染料浓度为0．75g／L的染液，CODCr的去除率可达80％以上，脱色率也达99％。在最佳反应条件下研究微波对铁炭床的强化作用，结果显示原始的铁炭床可以重复使用4次以上，当处理效果有明显下降时，利用微波再生铁炭床2min，处理效果恢复，且还可继续使用两次，再次再生，铁炭仍有一定的处理效果。微波不仅加强了铁炭床的处理效果，还延长了铁炭床的使用周期。     

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