钛酸四丁酯水解制备TiO2半导体光催化剂研究

研究了钛酸四丁酯水解制备TiO2粉末的两大影响因素R值（R是水和钛酸四丁酯的摩尔比）和烧结温度。通过光催化氧化五氯苯酚钠实验，结合对催化剂晶型结构、比表面积的表征分析，综合评价所制备的催化剂。实验结果表明，当R＝100、烧结温度为650℃、烧结时间为1h，钛酸四丁酯水解所制备的T iO2半导体光催化剂催化活性和使用寿命均比较理想。从晶型结构分析，当催化剂中锐钛矿和金红石胺一定比例共存时，其催化活性较单－金红石或锐钛矿高，实难认为锐钛矿与金红石的最佳比约为2：1。     

新农药环境化学行为研究（V）─—三氟羧草醚（Acifluorfen）在土壤和水环境中的滞留、转化

从如下几方面研究了三氟羧草醚在土壤－水环境中的化学行为：一是土壤对该药的吸附，结果表明，吸附强度与土壤理化特性密切相关，Ｆｒｅｕｎｄｌｉｃｈ常数ｋ＿ｆ＝０．９４Ｗ＿（ＯＭ）＋０．６５Ｗ＿（ＣＬＡＹ）－９．５９ｐＨ（ｒ￣２＝０．９４）；二是吸附机理研究，发现三氟羧草醚能与碱金属以外的许多金属离子形成配合物，并证实了与Ｃｕ￣（２＋）形成的双核桥联配合物的可能性；三是实验指出它在水中避光有一定的稳定性，不易水解；四是它在＜３５０ｎｍ的光辐照下，易脱羧转化，速度较快，光解产物有较好的稳定性。     

提高生物膜法处理洗漂废水效果的方法

以 60 0 0m3/d的洗漂废水处理厂为例 ,阐述了通过改进工艺方法 ,能使废水处理效果更加良好 ,运行更加稳定 ,单位水量处理成本更经济。     

混凝沉淀-水解酸化-好氧氧化-混凝沉淀工艺处理印染废水

介绍了混凝沉淀-水解酸化-好氧氧化-混合沉淀法在印染废水处理工程中的应用,分析了工程的设计及运行情况.实践表明,该方法在处理色度较大的印染废水过程中,能有效去除各种有机物、色度及部分无机物,抗冲击负荷能力强.     

丙烯腈装置污水治理方法探讨

介绍了国内外对丙烯腈生产污水的四种治理方法：四效焚烧、加压水解、沉淀焚烧以及深并处理等。并分析了各种治理方法的优缺点，对今后的治理工作提出“四效水解法”这一建议．     

采用"预处理+水解酸化+SBR"法处理制药废水

采用“预处理 水解酸化 SBR”工艺处理制药厂废水，处理量为6000m^3／d，CODcr、BOD5、SS、S^-2去除率分别为97．2％、99．3％、98％和99．9％，出厂废水均达到国家二级排放标准。     

Effects of β-cyclodextrins on the enzymatical hydrolysis of chiral dichlorprop methyl ester

The effect of β-cyclodextrins(β-CDs) on the enzymatical hydrolysis of chiral dichlorprop methyl ester (DCPPM) was studied.Four kinds of β-cyclodextdns(β-cyclodextrin, Partly methylated-CD(PM-β-CD), hydroxypropyl-cyclodextdn(HP-β-CD) and carboxymethyl-cyclodextdn(CM-β-CD) ) were used. Compared with 100% DCPPM in the absence of β-cyclodextrins, the activity of lipase decreased with the increase of β-cycledextrin and PM-β-cyclodextrin. However, CM-β-cyclodextrin stimulated the lipase activity. The inhibition effect of cyclodextrin and PM-β-cyclodextdn on the hydrolysis of DCPPM is affected by many factors other than degree of the methylation blockingthe active site of lipase. UV-Vis and Fourier transform infrared(FTIR) spectroscopy studies of the complexation of aqueous DCPPM with β-CDs provide fresh insight into the molecular structure of the complex and explain the effects of β-CDs on enzymatical hydrolysis of chiral DCPPM. Data showed that inclusion complexes had formed by complexation of the CM-β-CD with DCPPM and the solubility of DCPPM was increased in water, which leaded to the increased lipase activity.     

印染废水处理技术探讨

阐述了物理化学法和生物法在印染废水处理中的应用.通过实例介绍了厌氧水解+射流曝气+气浮回流+混凝气浮工艺,运行结果表明在平均进水水质CODCr560mg/L,BOD5216mg/L,SS178mg/L,色度200倍的条件下,其去除率分别为86.5%、93.0%、81.0%和90.0%,出水水质可达到<广东省地方标准水污染物排放限值>(DB44/26-2001)中的一级标准.     

Adsorption of acetanilide herbicides on soil and its components. II. Adsorption and catalytic hydrolysis of diethatyl-ethyl on saturated Na(+)-, K(+)-, Ca(2+)-, and Mg(2+)-montmorillonite

Adsorption and catalytic hydrolysis of the herbicide diethatyl-ethyl [N-chloroacetyl-N-(2,6-diethylphenyl)glycine ethyl ester] on homoionic Na⁺-, K⁺-, Ca²⁺-, and Mg²⁺-montmorillonite clays were investigated in water solution. The Freundlich adsorption coefficient, Kf, got from isotherms on clay followed the order of Na⁺ K⁺ > Mg²⁺ Ca²⁺. Analysis of FT-IR spectra of diethatyl-ethyl adsorbed on clay suggests probable bonding at the carboxyl and amide carbonyl groups of the herbicide. The rate of herbicide hydrolysis in homoionic clay suspensions followed the same order as that for adsorption, indicating that adsorption may have preceded and thus caused hydrolysis. Preliminary product identification showed that hydrolysis occurred via nucleophilic substitution at the carboxyl carbon, causing the cleavage of the ester bond and formation of diethatyl and its dechlorinated derivative, and at the amide carbon, yielding an ethyl ester derivative and its acid.These pathways also suggest that hydrolysis of diethatyl-ethyl was catalyzed by adsorption on the clay surface.     

厌氧酸化+兼氧+好氧工艺处理印染废水小试实验

某印染厂废水处理系统拟使用厌氧酸化+兼氧+好氧工艺对其生化处理部分进行改造,为减少改造风险进行小试研究。研究中改变进水污染物浓度和水力停留时间等条件,考察了不同条件下的处理效果的异同,小试的研究表明厌氧酸化+兼氧+好氧工艺处理该印染厂废水具有较好的效果,其结果可为同类型废水处理参考和借鉴。