桤木锯末对废水中As^(3+)的吸附特性

Adsorption Characteristics of As^(3+) from Waste Water by Alder Sawdust

研究了桤木锯末对水中A s3+的吸附特性,并探讨了pH、温度、Hg2+对水中A s3+吸附率的影响。结果表明,实验条件下锯末对A s3+的最佳吸附pH为4.0—6.0,最佳吸附温度为20℃;当Hg2+与A s3+同时存在时,增大Hg2+浓度有利于A s3+的吸附;桤木锯末对水中A s3+的吸附符合拟二级动力学方程。本研究表明,利用桤木锯末制备废水中A s3+吸附材料具有较好的应用前景。

The adsorption characteristics of alder sawdust on As3＋ in water was investigated.The effects of pH,temperature and Hg2＋ on the adsorption rate of As3＋ in water were studied.The best conditions of alder sawdust adsorbed As3＋ in wastewater were as follows：the optimal pH was controlled at around 4.0—6.0 and the adsorption temperature was 20℃.When Hg2＋ and As3＋ were concurrence,increase of Hg2＋ concentration made for adsorption of As3＋,and the adsorption of alder sawdust on As3＋ fit pseudo-second-order dynamic equation.The results showed alder sawdust has good application foreground in preparation of adsorption material for As3＋.