Fenton氧化法去除造纸法再造烟叶废水COD的研究

采用Fenton 氧化法深度处理经过生化处理后的造纸法再造烟叶废水,研究了H2O2用量、Fe2+用量、反应时间以及初始pH因素对CODCr去除率的影响,确定了最佳试验条件.结果表明,n(H2O2)∶n(Fe2+)为6∶1,H2O2用量36.75 mmol/L,Fe2+用量6.125 mmol/L,搅拌反应时间30 min,初始pH 为3时,CODCr去除率达最大值为72.26%,再添加PAM进行絮凝沉降处理,最终出水水质CODCr为60 mg/L.     

可见光/Fenton光催化处理高浓度味精废水的研究

对可见光辅助Fenton试剂处理味精废水的主要影响因素进行了研究。主要考察了光照强度,二价铁离子和双氧水摩尔配比((n(H2O2)/n(Fe2+)),反应时间及初始pH值等因素对废水的CODCr去除率的影响。通过单因素实验确定影响因素最佳范围并据此设计正交实验,确定了最佳反应条件为:在功率为60W的白炽灯照射下,pH值=3.5,n(H2O2)/n(Fe2+)=20 1,反应时间t=60min,此时CODCr去除率可达98.50%,各因素对反应的影响顺序为:pH>n(H2O2)/n(Fe2+)>反应时间。     

UV/Fenton试剂处理高浓度含酚废水的实验研究

研究UV/Fenton试剂中各个因素对降解高浓度含酚废水的影响,确定UV/Fenton法处理高浓度含酚废水的最佳工艺条件.保持UV/Fenton体系的基准条件不变,通过改变pH值、H2O2浓度、Fe2+浓度、反应时间等实验条件,考察这些因素对UV/Fenton法处理高浓度含酚废水效果的影响.结果表明,UV/Fenton试剂对高浓度舍酚废水有较好的去除效果和较高的反应速率.当苯酚初始浓度为1 000 mg/L时,紫外光波长为253.7 nm,反应时间为25～40 min,pH值为6～7,H2O2浓度为40～50 mmol/L,Fe2+浓度为28～30 mg/L时,苯酚去除率可迭90%以上,满足后续生物降解要求.     

Fenton试剂处理甲基丙烯醛生产废水的试验研究

研究了Fenton试剂对甲基丙烯醛生产废水的处理效果,考察了[H2O2]/[Fe2+]摩尔比,H2O2初始浓度,pH值,反应时间,温度对废水CODcr去除率的影响,确定了最佳的CODcr去除率条件.结果表明：当pH=2.5, [H2O2]/[Fe2+]摩尔比为26.4:1,温度为25℃,反应时间为5h,甲基丙烯醛生产废水CODcr浓度为812mg/L时,CODcr去除率达71.4%,处理效果良好.     

Fenton试剂氧化法深度处理青霉素废水

采用Fenton氧化技术深度处理青霉素废水,通过单因素试验,研究了pH、H2O2/Fe2+的摩尔比值、H2O2的投加量和反应时间T,4个因素对COD的去除效果及各因素间影响.结果表明:处理废水的最佳条件为废水初始pH为3,H2O2/Fe2+的摩尔比值为1∶1,H2O2的投加量为300 mg/L,反应时间为60 min,此时COD的去除率高达59%左右.在单因素基础上,使用Design Expert软件设计,通过二次回归得到COD去除率与废水的初始pH,H2O2/Fe2+的摩尔比,H2O2的投加量关系的回归模型,该模型能够较好地预测COD的去除率.同时,3个因素对COD去除效果的影响排序为H2O2投加量>H2O2/Fe2+的摩尔比>溶液初始pH,最后得到的优化参数为:pH为2.98,H2O2/Fe2+的摩尔比为0.76∶1,H2O2的浓度为295.10 mg/L,此时COD的去除率为57.415 5%.     

微电解-Fenton氧化法去除垃圾渗滤液中有机物

采用Fe/C微电解和Fe/C微电解-Fenton氧化联合工艺对垃圾渗滤液进行处理,研究了废水初始pH、药剂投加量、药剂投加比例和反应时间等对处理效果的影响,获得Fe/C微电解处理垃圾渗滤液的最佳工艺条件:初始pH =3、m(Fe)/m(C)为4、ρ(Fe/C)为0.6 g/L、反应时间为60 min,处理后COD降至5 960 mg/L,COD去除率达51.8％.Fe/C微电解-Fenton氧化处理垃圾渗滤液的最佳工艺条件:在Fe/C微电解最佳条件下,H2O2投加量为11 mL/L,反应时间为100 min,出水COD为4480 mg/L,COD总去除率为63.8％.垃圾渗滤液中的腐殖酸类有机质经过Fe/C微电解或微电解-Fenton氧化处理后变成小分子产物,与Fe/C微电解相比,Fenton氧化对腐殖酸等大分子有机质有更强的氧化降解效果.     

零价铁-Fenton氧化法预处理医药化工废水

研究用零价铁(Fe0)/双氧水(H2O2)-Fenton氧化法预处理医药化工废水.考察不同初始参数如初始pH、H2O2浓度、Fe0用量、废水初始TOC浓度、温度等对废水TOC去除率的影响.试验结果表明,在初始pH值为3.0、H2O2/TOC摩尔比为2、Fe0用量为12.0 g/L,废水初始TOC浓度为1.0 g/L和反应温度25℃的条件下,反应60 min后,废水TOC的去除率为75.5%.酸性条件和提高温度均有利于反应的进行.研究表明,曝气/Fe0/H2O2系统可作为一种有效去除医药化工废水中有机污染物的预处理方法.     

Fenton试剂氧化法深度处理含氰废水

针对某煤气厂生化处理出水总氰不达标的问题,采用Fenton试剂氧化法对出水进行了深度处理实验.考察了pH值、H2O2投加量、n(H2O2)/n(Fe2+)等因素对COD和总氰去除率的影响,并从去除率及经济性出发,确定了Fenton试剂的最佳操作条件.实验证实,Fenton试剂氧化法可实现对总氰的有效去除,使生化出水总氰的质量浓度低于0.3mg/L.     

Fenton试剂和UV-Fenton试剂深度处理垃圾渗滤液

研究了Fenton试剂和紫外光(UV)＿Fenton试剂联合深度处理垃圾渗滤液的最佳工艺条件,并对它们的处理效果进行比较,结果表明,最佳工艺条件是:H2O2量相当于COD耗氧值的1.5倍(即H2O2为0.96g/L)、pH值为3、FeSO4·7H2O的浓度为3.6×10-4mol/L(即100mg/L)、反应时间120min。在最佳工艺条件下,UV＿Fenton试剂联合处理渗滤液COD去除率达71.5%,比Fenton试剂单独处理时COD去除率提高了13%。     

Fenton化学氧化法深度处理造纸废水的试验研究

采用Fenton化学氧化法对造纸废水进行深度处理,考察了H2O2和Fe2+浓度、pH、反应时间等因素对COD去除率的影响。在H2O2(3%)投加量为13.33mL/L,FeSO4.7H2O投量为0.9g/L,pH为5,反应15min后静置5min的条件下,初始COD为290mg/L,色度为50倍的造纸生化出水的COD去除率可达到72%。结果表明,Fenton化学氧化法深度处理该废水可以取到很好的效果。     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to