中文摘要：

基于纳米活性白土的大比表面积和吸附特性,有效地解决了废水中锰(Ⅱ)的分离和预富集,对纳米活性白土的吸附性能作了较全面的研究。结果表明:在最佳试验条件下,当活性白土的用量为0.020 g时,其静态饱和吸附容量为6.13 mg.g-1;当在pH 4的含锰(Ⅱ)溶液中用0.500 g活性白土与之振摇5 min,随后令其静置6 h,锰的回收率达92%以上。吸附在纳米活性白土上的锰(Ⅱ)可用0.5 mol.L-1盐酸溶液25 mL与之振摇3 min并静置3 h使其解吸,解吸的回收率达95%以上。解吸溶液中的锰(Ⅱ)用火焰原子吸收光谱法测定,所提出的方法已用于磷化工艺的废水样中锰的测定,所得方法的检出限(3σ)、相对标准偏差(n=11)及回收率的数据依次为0.002 3 mg.L-1,1.0%及92.5%~99.0%范围内。

英文摘要：

Manganese(Ⅱ) in waste water was effectively separated and preconcentrated by adsorption on powdered nano-attapulgite based on its predominant specific surface and adsorption characteristics.Adsorption behavior of the nano-attapulgite towand manganese(Ⅱ) were studied in detail.It was found that under optimum condition,static saturated adsorption capacity tested on the base of 0.020 g nano-attapulgite was found to be 6.13 mg·g-1;and a recovery of over 92% was achieved when manganese(Ⅱ) in a solution of pH 4 w...