纳米/微米氧化铁对阿散酸类添加剂去除效果的影响研究

Effects of nano and micro Fe_2O_3 on the removal efticiency of the additive of arsanilic acid

以纳米和微米氧化铁为反应材料,研究了纳米/微米氧化铁对不同浓度阿散酸去除效果的影响.结果表明:纳米氧化铁对不同浓度阿散酸的去除效果优于微米氧化铁;当阿散酸浓度在2.5～50mg/L以及纳米氧化铁投加量为100mg/L时,去除率随初始浓度的升高而下降,整体在21.7%～62.5%;纳米和微米氧化铁氧化分解阿散酸会导致氨氮和高毒性的无机砷的释放.研究结果有助于进一步理解阿散酸类添加剂在水体中的行为.

The removal efficiency of arsanilic acid at different concentrations was investigated by using nano and micro Fe 2O 3. The results indicated that: The removal of arsanilic acid by using nano Fe 2O 3 was better than micro Fe 2O 3;When the concentration of arsenic acid was 2.5~50 mg/L and the dosage of nano-iron oxide was 100 mg/L, the removal rate decreased with the increase of initial concentration, and the total amount was between 21.7% and 62.5%;The degradation of arsanilic acid with nano and micro Fe 2O 3 led to the release of ammonia nitrogen and highly toxic inorganic arsenic. The results of the study help to further understand the behavior of azadic acid additives in water.