作　　者： ; ; ; ; ;

机构地区： 中国矿业大学北京化学与环境工程学院

出　　处： 《环境工程学报》 2007年第11期1-5,共5页

摘　　要： 采用硼氢化钠还原法制备核-壳结构的Fe-FeOxH2x-3复合材料,研究了富里酸在UV/H2O2和UV/H2O2/Fe-FeOxH2x-3两种不同反应体系下的降解情况。结果表明,核-壳结构Fe-FeOxH2x-3的存在,提高了UV/H2O2降解富里酸的反应速率,TOC去除达到84%。采用XAD树脂吸附法对反应前后的富里酸进行化学分级表征,结果表明,富里酸经反应后憎水酸(HoA)、弱憎水酸(WHoA)和憎水中性物质(HoN)都有所减少,进而转化为亲水性物质(H iM);用超滤膜法对富里酸进行物理分级表征,考察了富里酸在反应前后分子量分布的变化情况。同时,富里酸经过反应后生成的中间产物降低了三氯甲烷生成趋势。 Core-shell Fe-FeOxH2x-3 was prepared by NaBH4 reductive method. The degradation of fulvic acid was investigated by using the system of UV/H2O2 and UV/H2O2/Fe-FeOxH2x-3 The results indicated that the presence of core-shell Fe-FeOxH2x-3 accelerated the degradation rates of fulvic acid using UV/H2O2, the removal of TOC reached to 84%. The chemical fractionation of fulvic acid was measured by XAD resin adsorption method. Hydrophobic acids （HoA） ,weakly hydrophobic acids （WHOA） and hydrophobic neutrals （HoN） were reduced after the reaction. And all of them were transformed to the hydrophilic matter （HIM）. The physical fractionation of fulvic acid was measured by ultra-filtration method. The change of apparent molecular-weight （MW） distribution of fulvic acid before and after reaction were investigated. The trihalomethane formation potential （THMFP） was declined after the photodegradation of fulvic acid.

关 键 词： 富里酸 三氯甲烷生成趋势 物理分级化学分级

领　　域： [环境科学与工程]