Double catholyte electrochemical approach for preparing ferratealuminum：a compound oxidant—coagulant for water purification

Ferrate is an excellent water treatment agent for its multi-functions in oxidation,disinfection,coagulation and adsorption,but its coagulation ability depends on its dosage and is after its oxidation.This paper focuses on preparing a new kind of ferrate combined with alum to enhance its coagulation function for water purification.An effective electrolysis reactor was designed and employed in the test.Some key parameters in the process of electrolysis concerning the prepar\ation efficiency,such as the current density,temperature and alkalinity were also investigated.The proper conditions for ferrate-alum preparation were determined.Under the condition of 5V given voltage,6h electrolyzing interval,below 2% alum concentration (in weight),a combined liquid ferrate-alum products was successfully prepared,which contained 0.0294 mol/L FeO4^2- and 0.0302 mol/L total soluble ferron with 2% Al2O3.There was no insoluble ferron produced by controlling an optimum electrochemical condition.     

A novel fiber coating for solid phase microextraction and its application for the extraction of n-alkane from aqueous sample

Base on the previous work in laboratory, a novel polyaniline doped with polydimethylsiloxane coating was developed on a stainless steel wire for solid phase microextraction（SPME） by electroplating method. This electroplating method not only has advantages of ease preparation and simple equipments required, but also increases the lifetime of the SPME fiber. The composite fiber（polyaniline/ polydimethylsiloxane（PANI/PDMS）） was evaluated by analyzing n-tridecane, n-tetradecane and n-pentadecane in aqueous sample. The new fiber coating showed comprehensive abilities to extract alkanes compounds. The relative standard deviations were found to be 6.8%-10.33%.     

便携式气相色谱仪在VOCs污染源监测中的应用

便携式气相色谱仪（Portable GC）是一种能在野外现场完成对VOCs气体进行分析测试的新型气相色谱仪，该仪器完全避免VOCs监测中的样品的保存问题。通过对这种仪器性能与操作，以及用针筒、塑料袋采集3苯（苯、甲苯、二甲苯）的采样评价实验，探讨了便携式气相色谱仪在VOCs污染源监测中的应用。     

NO在Cu—ZSM—5上的催化分解

从铜离子交换液温度，浓度，ＰＨ值，以及铜离子交换的次数，交换的有无中间焙烧这几方面详细地讨论了铜离子交换条件对所制Ｃｕ－ＺＳＭ－５催化剂ＮＯ分解活性的影响；并且考察了Ｃｕ－ＺＳＭ催化分解ＮＯ活性随空速。     

电解制备高效聚合铝的溶液化学因素

采用电化学方法合成聚合氯化铝，通过在线有效控制电解过程的关键参数，可以年鉴轩出高碱化度，高Ａｌｂ含量的ＰＡＣ液体产品，本文研究了ＰＡＣ电合成的重要溶液化学因素，如电解液的性质、浓度、组成、ｐＨ、离子迁移，形态转化等，从而提出了制备设定浓度和碱化度的ＰＡＣ的最佳溶液化学条件，并证明溶液化学因素与电量参数之间具有必然联系。     

多功能高铁絮凝剂电化学合成的机理和条件

本文研究了采用电解加复合稳定剂的方法制备ＦｅＯ４＾２－絮凝剂的电化学与溶液化学过程机制，分析了ＯＨ＾－膜平衡过程对ＦｅＯ４＾２－形成的影响，探讨了ＦｅＯ４＾２－水溶液分解的诱发因素，初步确定了ＦｅＯ４＾２－电化学合成的最佳条件。研究结果表明，适宜的电量参数，合理的电解液组成和高效的ＯＨ＾－膜渗透是顺利进行稳定化ＦｅＯ４＾２－电解合成的三个要素。     

聚硅酸金属盐絮凝剂的制备和絮凝性能

本文对制备聚硅酸金属盐絮凝剂的条件及其絮凝除浊除色效果进行了实验研究。结果表明，在适当酸化ｐＨ条件下，进行硅酸与金属离子聚合反应，可获得具有较高分子量的ＰＳＭＳ。低浓度ＰＳＭＳ可以保持较长稳定时间，与传统铝、铁盐凝聚剂相比，ＰＳＭＳ可显著提高并改善絮凝除浊除腐植酸的效果，这种ＰＳＭＳ絮凝剂更适合于水厂现场制备投加。     

氨荒酸膦酸树脂滤器的制备及其在AAS分析中的应用研究

介绍了氨荒酸膦酸树脂过滤器的制备方法,以及应用该过滤器分离与富集地面水(海水)中Cu、Pb、Zn、Cd等元素的适用条件。实际样品中的Cu、Pb、Zn、Cd等重金属离子经过过滤器过滤,被吸附在树脂滤层中,用少量酸洗脱,以AAS测试,结果稳定、准确度高。此过滤器在痕量分析中具有很高的应用价值。     

Preparation of starch esters

A review of starch esters prepared from either aqueous or solvent-based reactions leading to high (3.0)- and/or low (<0.2)-degree of substitution (DS) derivatives are discussed. A novel process for making intermediate-DS (0.5–1.8) starch esters from aqueous media is compared to traditional methods.     

聚硅氯化铁混凝剂的制备及其对微污染源水混凝性能的研究

以硅酸钠、三氯化铁两种常用的无机原料合成聚硅氯化铁混凝剂（PFSC）,试验其对微污染水的处理效果,并对其混凝机理作了初步的探讨。试验结果表明：r（Fe）/r（SiO2）摩尔比、pH值及投加量都会影响PFSC的混凝效果,其中以r（Fe）/r（SiO2）最为明显,当两者摩尔比为1.2时,所制备的PFSC混凝效果最佳,处理效率高于常规混凝剂。