新生态MnO_2对水中As(Ⅴ)去除效果

Efficiency of Removing As(Ⅴ) in Water with the Fresh MnO_2

实验研究了新生态 Mn O2 对 As( )除砷效果及影响因素。在优化的实验条件下 (室温 ,p H值 6 .5附近 ,Mn O2 的投加量为 1 0 0 mg,接触时间 2 h) ,新生态 Mn O2 对 As( )的去除率达 98% ;加入阴离子 ,与As( )形成吸附竞争 ;加入阳离子如 Fe3 + 、Al3 + 等可改善 As( )

The removing efficiency and influence factors to arsenic with fresh MnO 2 were studied.Under the optimalized experimental conditions (at room temperature,pH around 6.5,the addition amount of MnO 2 100mg,contact time 2h),the removing efficiency of As(Ⅴ) is over 98%.The addition of anion shows a adsorption competition with As(Ⅴ).The addition of cation such as Fe 3+ ,Al 3+ etc.promotes the removing efficiency.