碱改性粉煤灰处理含铬废水  

Treatment of Wastewater Containing Cr^(6+) with Alkali Modified Fly Ash

作　　者：徐洁[1] 陈海燕[1] 王旋[1] 

机构地区：[1]扬州工业职业技术学院化学工程学院,江苏扬州225127

出　　处：《矿产综合利用》2016年第6期68-71,共4页Multipurpose Utilization of Mineral Resources

基　　金：江苏省高等学校大学生创新创业训练项目(201513754015X)资助

摘　　要：采用碱改性方法改性粉煤灰,通过单因素试验处理含铬废水,并对操作条件进行选择和优化,单因素试验表明当投灰量60 g/L,pH值14,吸附时间60 min,吸附温度为20℃,Cr^(6+)初始浓度为40μg/m L的条件下,Cr^(6+)去除率可达92.72%。吸附机理试验表明碱改性粉煤灰吸附含铬废水的过程符合Freundlich吸附等温方程。The operating condition of Cr6＋ removal from water by alkali modified fly ash has been compared and optimized by single-factor experiment methods. The single-factor experiment results show that when the dosage of the modified fly ash is 60 g/L, pH = 14, and the adsorption time is 60min, the removal rate can reach more than 94. 71%. The mechanism of Cr6＋ removal from water by modified fly ash has been discussed. The adsorption of Cr6＋ by modified fly ash conforms to Freundlieh model.

关 键 词：粉煤灰 碱改性 含铬废水 

分 类 号：TD989[矿业工程—选矿] X703[环境科学与工程—环境工程]