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黄铁矿催化H2O2氧化降解水中三氯生

Keywords: 黄铁矿,类Fenton,三氯生,高级氧化

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Abstract:

以三氯生为目标污染物,研究了黄铁矿催化H2O2非均相类Fenton体系对污染物的去除效果,并利用SEM、EDS等手段对天然黄铁矿进行了表征。考察了催化剂、H2O2投加量、溶液初始pH、反应时间等重要因素对催化氧化反应的影响。在H2O2投加量5mg/L,黄铁矿用量0.1g/L,溶液初始pH为8,反应10min后,三氯生的去除率达90%以上。相对于传统Fenton反应,pH对本非均相催化反应的影响较小,在2~10的pH范围内,仍有较高的催化活性。利用GC-MS分析显示,三氯生降解过程能够产生包括2,4-二氯苯酚在内的多种中间产物。

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