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UV/H2O2/Fe-FeOxH2x-3和UV/H2O2工艺降解水中富里酸的研究

Keywords: Fe-FeOxH2x-3,富里酸,三氯甲烷生成趋势,物理分级,化学分级

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Abstract:

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(HiM);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。

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