载铁活性炭的制备及其吸附水中砷的研究

Study on preparation of activated charcoal modified by Fe^(3+) and its adsorption of As ( Ⅴ) from drinking water

用Fe3+对活性炭进行修饰,用于吸附水中的砷。结果表明,活性炭改性的最佳条件为:活性炭与12 000 mg/L的Fe3+溶液,在1∶100(g/mL)的情况下,振荡3 h,Fe3+吸附率近40%。活性炭对砷的吸附属于物理吸附,全过程无其他离子引入水中,不会对水体造成二次污染。获得了一种新的从饮用水中去除砷的方法。

Activated carbon with a modified Fe3＋ for the adsorption of arsenic. The result indicated that the optimum condition of activated charcoal modified were as follows：the concentration of Fe3＋ solution was 12 000 mg/L,solid-to-liquid ratio is 1：100（g/mL） ,and oscillation for 3 h,the adsorption rate near 40%. Additionally, the adsorption of As （V） by the modification of activated charcoal belongs to physical adsorption, therefore, this method do not bring other ions into the water. A new remarkable method of re- move the nocuous residual chlorine from the drinking water was got.