摘要：

以膨润土为原料制备了铝柱撑改性膨润土,并研究了不同影响因素对铝柱撑改性膨润土去除电镀废水中Cr⁶⁺的影响。结果表明:铝柱撑改性膨润土对Cr6+的去除率明显优于膨润土原土;废水的pH、吸附时间和膨润土投加量对Cr⁶⁺的去除率影响较大;pH=4,吸附时间为40 min,投加质量浓度为40 g/L,铝柱撑改性膨润土对Cr⁶⁺的去除率达到最大86.1%;铝柱撑改性膨润土对电镀废水中Cr⁶⁺的吸附符合Langmuir吸附等温方程。

关键词: 柱撑改性膨润土, 电镀废水, 废水处理

Abstract:

Bentonite has been used as raw material for the preparation of aluminum pillared modified bentonite. The effects of different influencing factors on the Cr⁶⁺removing rate from electroplating wastewater with aluminum pillared modified bentonite are studied. The results show that the Cr⁶⁺removing rate from electroplating wastewater with the aluminum pillared modified bentonite is significantly better than that with the original bentonite. The factors,such as wastewater pH,adsorption time and bentonite dosage have greater effect on the Cr⁶⁺removing rate. The Cr⁶⁺removing rate by aluminum pillared modified bentonite reaches the highest,86.1%,in the case of pH=4,adsorption time 40 min,and dosage 40 g/L. The adsorption of Cr⁶⁺in the electroplating wastewater by aluminum pillared modified bentonite conforms to Langmuir adsorption isotherm equation.

Key words: pillared modified bentonite, electroplating wastewater, wastewater treatment

中图分类号: 

• X703.1