纳米光催化还原去除水中铜离子

Removal of Cu^(2+) from water by nano photocatalytic reduction

基于纳米光催化还原技术,以纳米二氧化钛作为光催化剂,研究一种水体中重金属Cu2+去除方法。采用原子吸收评价水体中Cu2+去除效果,考察了水体pH值、不同光源及光照时间、催化剂添加量、Cu2+初始浓度以及乙醇加入量的影响。结果表明,Cu2+初始浓度在2～50 mg/L,pH为6.0～8.0,添加0.3 g/L纳米二氧化钛,紫外光照50 min,不加乙醇,Cu2+去除率可达到80%以上。

A kind of method of removing Cu2＋ was studied using titanium dioxide as a photocatalyst based on photocatalytic reduction techniques.The removal rate of Cu2＋ was evaluated by atomic absorption spectrophotometry,pH values,different light sources and irradiation time,catalyst amount,Cu2＋ initial concentration and the quantity of ethanol were investigated.The results showed that when Cu2＋ initial concentration was 2～50 mg/L,pH was 6.0～8.0,0.3 g/L of titanium dioxide was added,UV irradiation time was 50 minutes,and without ethanol,Cu2＋ removal rate could reach 80%.