混凝-Fenton试剂对印染废水的处理

研究了混凝-Fenton氧化法对两种不同模拟水样的处理效果,筛选了最佳的混凝条件及氧化条件.试验结果表明,混凝-Fenton氧化法对亲水性染料和疏水性染料废水都适合;pH值对混凝-Fenton氧化法影响较大,混凝的适宜pH值为8~10,而Fenton法氧化的适宜pH值为3左右;废水CODCr与色度去除率分别达到90%和95%以上.     

微波强化ClO_2催化氧化处理活性艳黄染料废水

以γ-Al2O3为载体,采用浸渍-沉淀法制备了CuOn–La2O3/γ-Al2O3催化剂。探讨了ClO2浓度、微波辐照功率及辐照时间、催化剂用量、体系pH值、体系温度及不同工艺对活性黄染料废水去除效能的影响。结果证实了微波强化ClO2催化氧化法的高效性和可行性。研究表明：微波强化ClO2催化氧化法能够有效去除水中活性艳黄染料,缩短反应时间,减少催化剂用量,拓宽pH值使用范围。对于200mg/L的染料废水,其处理的最佳工艺条件为：微波辐照功率400W,辐照时间1.5min,催化剂CuOn–La2O3/γ-Al2O3加入量70g/L,ClO2浓度80mg/L,体系pH值为7,在此工艺条件下,脱色率达92.24%。对比不同处理工艺,微波强化ClO2催化氧化法能够显著地提高水中活性艳黄染料的去除效果,为染料废水的处理提供了一种行之有效的新方法。     

电催化氧化降解活性红紫X-2R染料废水的研究

采用复极性三维三相电极反应装置对活性红紫X-2R染料进行了电催化氧化降解试验,分析了外加电压、主电极极间距、电流密度、初始pH值、曝气量等因素对降解效果的影响,确定了最佳工艺条件:外加电压30 V,电流密度28 mA/cm2,主电极极间距5 cm,初始pH值6,曝气量3 L/min,初始质量浓度为400 mg/L的染料废水经50 min电催化氧化后,脱色率与COD的去除率分别达99.1%和93.5%.     

电催化氧化降解活性红紫X-2R染料废水的研究

采用复极性三维三相电极反应装置对活性红紫X-2R染料进行了电催化氧化降解试验,分析了外加电压、主电极极间距、电流密度、初始pH值、曝气量等因素对降解效果的影响,确定了最佳工艺条件：外加电压30 V,电流密度28 mA/cm2,主电极极间距5 cm,初始pH值6,曝气量3 L/min,初始质量浓度为400 mg/L的染料废水经50 min电催化氧化后,脱色率与COD的去除率分别达99.1%和93.5%.     

应用天然褐铁矿催化生物电芬顿体系氧化橙Ⅱ染料

研究比较了将褐铁矿、磁铁矿和赤铁矿3种铁矿粉投加到生物电芬顿体系中,发生Fenton反应氧化降解模拟废水中的橙Ⅱ染料的效果.结果表明,3种铁矿均能够催化形成生物电芬顿体系,其中褐铁矿的催化效果最好,2.5h橙Ⅱ染料的去除率可以达到98%以上.在以褐铁矿催化的生物电芬顿体系中,pH值1—5范围内,pH值越低对橙Ⅱ的去除效果越好.pH值为2的模拟橙Ⅱ染料废水经25h连续处理,COD去除率可以达到72%,矿化电流效率达76.90%.向50ml阴极体系中投加0.1g褐铁矿,可以维持体系在较高的氧化效率下连续运行20个周期,且没有残渣产生.     

过硫酸盐催化氧化降解染料废水试验研究

本文对过硫酸钾催化降解罗丹明B染料废水进行了试验研究。结果表明,药剂投加量以及pH值对罗丹明B染料废水的脱色效果具有显著影响。在[罗丹明B]=50mg/L的初始情况下,[K2S2O8]=3mmol/L,[Fe（Ⅱ）]=1mmol/L,pH值为中性偏酸范围脱色效果最佳;在这个条件下,反应时间2h后,罗丹明B脱色率达到99%以上。     

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.     

A/O MBR处理印染废水中进水pH值对降解性能的影响

采用厌氧好氧膜生物反应器(A/OMBR),系统考察了当进水pH值在5.0～9.0范围变化时,各反应槽的活性污泥对活性艳蓝KNR染料及COD的降解性能变化情况.从而探索出在厌氧与好氧微生物协同作用下,微生物对染料及有机污染物的降解性能不受明显影响的进水pH值波动范围,为降低实际印染废水处理中化学试剂的使用量提供理论依据.结果表明,只有当进水pH值为9.0时,厌氧槽对脱色率的贡献大于好氧槽,而当进水pH值在5.0～8.0范围内变化时,好氧槽对系统脱色率的贡献大于厌氧槽.进水pH值对厌氧活性污泥的COD的去除效果几乎没有影响,而中性及偏酸性的进水条件更有利于好氧活性污泥对COD的降解.在偏碱性的进水条件下,膜对可溶性COD的截流作用更明显.当进水pH值在5.0～9.0范围内变化时,由于厌氧槽的pH值都能够稳定在6.0附近,使好氧槽和系统出水的pH值能够分别保持在7.0和7.5附近,从而保证了整个系统对染料及COD的降解性能处于最佳状态.     

光催化氧化处理垃圾渗滤液研究

通过实验，研究分析了不同催化剂(TiO2、ZnO)、pH值、光照时间对垃圾渗滤液光催化氧化的影响，得出：TiO2光催化氧化效果明显优于ZnO的效果，TiO2光催化氧化对COD的去除率为72％;pH值对光催化影响不大，pH＝5—9均可；光照时间60min效果最好．     

有机碳源环境下的厌氧氨氧化批式实验

通过厌氧氨氧化批式实验,研究了在有机碳源环境下COD/NH4 -N比、pH值以及NO2--N浓度对厌氧氨氧化反应的影响.结果表明:在有机碳源环境下,厌氧氨氧化作用和反硝化作用可以同时存在;适宜的COD/NH4 -N比值范围在0~1.57之间;适宜的pH值范围应该在6.02~8.50之间,最适pH值为8.00;为了得到较好的脱碳和脱氮效果,在初始COD值为300mg/L时,初始NO2--N浓度不宜超过500mg/L,否则会抑制厌氧氨氧化反应和反硝化反应的进行.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-