臭氧-固定化生物活性炭去除煤气废水中酚的研究

将降解酚类化合物的高效工程菌固定在活性炭上,采用臭氧-固定化生物活性炭(O3-IBAC)工艺处理煤气废水。研究证明:在臭氧投量为18mg/L ,接触时间为2 0min时,臭氧可以改变水中有机物的结构,但是有机物的总量没有明显的变化。当煤气废水进水COD、酚类的质量浓度分别为5 0 0mg/L、95mg/L左右时,采用O3-IBAC工艺对两者的去除率可以分别达到80 %、92 %以上。系统运行6个月后,IBAC上工程菌分布均匀,炭数量可达6 .1×10 3cfu/g ,而且工程菌在种类上仍然占优势。同时,运用生态位理论解释了工程菌可以长期稳定存在,且保持较高的生物活性的原因     

固定化生物活性炭处理含油废水的试验研究

提出一种含油废水处理的新技术,采用人工固定化生物活性炭处理含油废水,其对油的去除效率在80％-95％之间,COD平均去除率达到53％,出水中油质量浓度小于5mg/L．试验结果表明该工艺对污染物的去除效果明显高于颗粒活性炭和传统的二级气浮工艺．     

A-O-混凝-固定生物活性炭组合工艺处理煤气废水的中试研究

采用“A-O-混凝-固定化生物活性炭（IBAC）”组合式工艺对煤气废水进行了中试研究，并在生化段采用了水解酸化池与接触氧化池串联。研究结果表明，在进水CODc，〈2500mg／L、NH^＋ 4- N〈150mg／L、多元酚〈600mg／L和单元酚〈100mg／L时，处理后的水质可以达到CODe，〈150mg／L、NH^＋ 4-N〈25mg／L、多元酚〈20mg／L和单元酚浓度介于0．053-0．809mg／L之间。该工艺对CODe，的去除率〉90％，单元酚去除率〉95％，NH^＋ 4-N去除率〉80％。     

固定化过氧化物酶催化去除五氯酚反应装置和条件探讨

利用Ｆe_３Ｏ_４吸附-明胶包埋-交联固定过氧化物酶（HRP）催化去除五氯酚（PCP）,在最佳反应条件的基础上,探讨了固定化酶重复使用过程中催化去除效果的变化规律,设计了酶催化连续反应装置,确定了反应装置适宜的流速条件及PCP去除效果,酶催化性能的稳定性,以及二级催化处理的效果。结果表明,该装置最佳运行流速约为3mL/min,在此流速下可长时间连续处理含PCP废水;固定化HRP具有良好的催化稳定性;在一级催化反应装置的处理效果不满足排放标准的情况下,可进行二级处理, PCP总去除率可达92.7％,水中残留五氯酚浓度为0.98mg/L,明显低于国家一级排放标准（5mg/L）。     

固定化微生物法处理含酚废水的研究

采用PVA-硼酸法制作固定化污泥颗粒，在不同条件下对活性恢复的污泥颗粒进行实验，得出苯酚降解的适宜条件。污泥与载体体积比为1：1，平均粒径2～4mm，载体为PVA 活性炭的固定化污泥颗粒，在水力停留6h，泥水比为1：4，进水酚浓度达250mg／L时，可得99．8％的酚去除率，废水可达到国家排放标准。     

内聚营养源SRB固定化交联剂的选择及对含锌废水的处理

以聚乙烯醇为包埋介质,对硫酸盐还原菌（SRB）进行固定化处理：以含锌废水为处理对象,考察不同交联剂对成球性能影响、营养源内聚效果、硫酸盐还原效果、锌离子去除率和出水COD（化学需氧量）等因素。研究结果表明：最佳交联剂为40％（NH4）2S04和2％CaCl2：采用该交联体系制得固定化小球,每克小球内聚33．11mg乳酸钠,硫酸根还原率为53．5％,锌离子去除率可达到98％,出水COD低于100mg／L;固定化小球经过4次循环试验,出水锌离子浓度仍达到污水综合排放二级标准。     

用固定化啤酒酵母细胞合成胞嘧啶核苷二磷酸胆碱

κ－卡拉胶－魔芋多糖复配胶包埋的啤酒酵母细胞，经冻融处理后用于合成胞嘧啶核苷二磷酸胆碱（CDP－胆碱）。结果表明：250mL摇瓶中加入50mL反应液（葡萄糖400mol/L，CMP10mmol/L，磷酸碍碱50mmol/L,K2HPO4-KH2PO4缓冲液100mmol/L，MgSO410mmol/L,pH=8.0），固定化细胞1200g/L,34℃、150r/min下，反应4h后补加400mmol/L葡萄糖，反应8h可使60％以上的CMP转化为CDP－胆碱。反应液经灭菌和添加辅酶I（NAD^ ）后，固定化细胞可连续使用4次，CDP－胆碱转化率维持在40％以上。     

微波辅助催化氧化高浓度含醛废水应用研究

考查了活性炭（GAC）固定床反应器在微波辅助催化氧化作用下对某石化公司高浓度含醛废水的连续处理情况,在消除活性炭吸附作用后,在微波功率400W、废水流量6．0mL／min、空气流量0．085m^3／h和45gGAC条件下对含醛废水（初始CODCr浓度为33494mg／L）进行了处理．实验结果表明,含醛废水的CODCr去除率为94％,TOC去除率为99％;在没有GAC的条件下,微波对含醛废水则几乎没有效果．     

包埋固定化复合菌低温下处理养猪废水研究

选用聚乙烯醇(PVA)、海藻酸钠(SA)和河沙作为包埋固定化载体材料,制备成固定化复合菌小球(MB),用于处理养猪废水,并以水体中氨氮和COD去除率为指标考察了影响养猪废水净化的各种因素.研究结果表明,在外界气温1～8°C、固定化小球投加量20％、曝气量6～7 mg/L、pH7.0～8.4和间歇曝气时间比1∶1时,养猪...     

固定化蜡质芽孢杆菌处理制革废水中Cr(Ⅵ)的条件优化

为了高效去除制革废水中的Cr(Ⅵ),实验采用粉末活性炭包埋蜡质芽孢杆菌(Bacilluscereus)制成固定化细胞颗粒,并探讨了该颗粒去除Cr(Ⅵ)的效果。结果表明,在pH值5.0、温度37℃、Cr(Ⅵ)初始浓度小于10mg/L、颗粒用量0.5g/mL左右时,Cr(Ⅵ)去除率较大;在最优条件下,固定化细胞颗粒处理Cr(Ⅵ)的效果比未加菌体的固定化颗粒和Bacillus cereus单独处理时的效果都好。研究表明,固定化Bacillus cereus细胞颗粒可以作为一种新的生物材料,处理制革废水中的Cr(Ⅵ)。     

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