硫化亚铁处理含Cr(Ⅵ)废水试验研究  

Experimental Study on FeS to Treat Cr(Ⅵ)-Bearing Waste Water

作　　者：赵玉华[1] 王成雨[1] 李洋洋[1] 魏志宇[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2008年第6期1043-1045,1050,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：建设部科技攻关项目(05-K2-11)

摘　　要：目的采用硫化亚铁（FeS）处理含Cr（Ⅵ）废水，达到降低污水毒性的目的.方法采取化学氧化还原方法，把毒性很强的Cr（VI）还原成Cr（III），以便通过沉淀、吸附加以去除.结果随着投加的FeS粒径减小，水的pH下降，Cr（Ⅵ）去除率增加.在10-35℃范围内，FeS对Cr（Ⅵ）去除率随着温度的升高而增加，而在35-40℃时，FeS对Cr（Ⅵ）去除率却随着温度的升高而降低.试验条件下，pH4.5，粒径0.08-0.11 mm，温度25-30℃，是去除水中Cr（Ⅵ）含量的适宜条件.该条件下，当FeS投加量≥2 g/L时，Cr（Ⅵ）去除率99%以上.结论FeS可显著降低含Cr（Ⅵ）废水的浓度.We use FeS to deal with Cr（ Ⅵ ） waste water in order to reduce the toxicity of the waste water. The chemical oxidation-reduction method was used to turn toxic Cr（VI） to Cr（Ⅲ）, then the toxicity of the waste water is removed through precipitation adsorption. The removal rate of Cr（ Ⅵ ） increases with the reduction of the size of FeS and the drop of pH. At 10 -- 35 ℃, the removal rate of Cr（ Ⅵ ） increases along with the increase of the temperature;but during 35--40 ℃, with the increase of the temperature, it decreases. Under the experimental condition, the appropriate of the FeS is 0.08 - 0.11 mm and the temperature is condition of removing Cr（ Ⅵ ） is when pH is 4.5, size at 25 - 30℃. When the dosage of FeS is no less than 2g/L, the removal rate of Cr（ Ⅵ ） is over 99 %. Thus, FeS can significantly reduce the concentration of Cr （ Ⅵ ） in waste water.

关 键 词：Cr(Ⅵ)废水 FES 氧化还原 吸附 

分 类 号：X781.1[环境科学与工程—环境工程]