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纳米铁的制备及去除废水中的Cr(Ⅵ)

Keywords: 纳米铁,制备,Cr(Ⅵ),吸附,还原,去除率

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Abstract:

铬离子(Ⅵ)是水体、土壤中的一类重要污染物,对人体及其他动物有毒害和致癌作用。主要来源于采矿、冶金和电镀等工业排放的废水。为了寻求一种更好的铬离子(Ⅵ)处理方法,实验以三价铁盐为原料,制备了一种具有高比表面积和高反应活性的新型水处理剂——纳米铁,其广泛的应用于难降解的氯代有机物、重金属离子和染料等的处理以及对受污染地下水的原位修复等领域,通过其对六价铬离子的吸附与还原过程的研究。提出了最佳去除条件:即当投加量为0.02g/L,pH为8,温度为30℃时,纳米铁对六价铬离子的去除效果最好,去除率大于90%。

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