酸改性膨润土对废水中铬的吸附性能研究  

Adsorption of Cr^(6+) in Wastewater by Acid-modified Bentonite

作　　者：罗平[1] 田英[1] 张辉[1] 刘志寅[1] 

机构地区：[1]南京工业大学环境学院,江苏南京210009

出　　处：《非金属矿》2012年第6期77-79,共3页Non-Metallic Mines

摘　　要：以硫酸为改性剂,对膨润土进行活化改性,考察了膨润土原土及酸改性膨润土用量、吸附时间以及pH值等因素对其处理低浓度含Cr6+废水的影响。结果表明,在35℃下,当改性膨润土用量为0.8g/100mL,吸附时间为40min,pH值在2以下时,对废水中Cr6+(1 mg/L)的吸附效果较好,吸附量可达0.047 mg/g。改性膨润土吸附Cr6+的动力学数据满足准二级动力学方程。Bentonite was modified with sulfuric acid as the modifier. The effects of various parameters on modified bentonite removing Cr6＋ in low concentration wastewater were investigated, such as dosage of acid-modified bentonite temperatrue, the adsorption time and the pH value. The results showed that, at 35 ℃, the adsorption capacity of Cr6＋ （ling/L） was more than 0.047 mg/g under the following conditions： the dosage of acidmodified bentonite was 0.8 g/100fiaL, the adsorption time was 40 min, the pH＇value was within 2. The modified bentonite has good performance on adsorbing Cr6＋, the dynamic data met the quasi-second order kinetic equation.

关 键 词：膨润土 酸改性Cr6+ 废水吸附 

分 类 号：X701.3[环境科学与工程—环境工程]