摘要
为去除水体残留的违禁药物孔雀石绿,采用自制竹活性炭以及3种市售竹炭为吸附剂,将孔雀石绿溶液作为吸附体系,研究27,35和40℃时孔雀石绿在活性炭上的吸附平衡与动力学,检测违禁药物孔雀石绿的残留量,并对自制和市售吸附剂的吸附性能进行对比。研究结果表明:高比表面积活性炭对废水中残留孔雀石绿去除效果明显;Freundlich吸附等温线模型可较好地用于描述孔雀石绿在活性炭上的吸附平衡,Freundlich常数KF随比表面积和孔容的增大而增大,自制竹活性炭性能更佳;准二级方程可用于描述孔雀石绿在活性炭上吸附的最佳动力学模型,并可得到相应动力学参数;对同一种吸附剂,温度对吸附动力学速率常数有较大的影响,在35℃时,速率常数最小。
For the removal of residue Malachite green which is highly poisonous and carcinogenic,the adsorption equilibrium and dynamics of malachite green from aqueous solution on three commercial bamboo charcoals and a self-prepared bamboo-based activated carbon were determined at 27,35 and 40 ℃.The residue of malachite green was detected.At the same time,comparison between the self-prepared and three commercial adsorbents was made.The experimental results show that activated carbons with high specific surface area are effective adsorbents for the removal of residue malachite green in wastewater.Freundlich equation is the best for describing the adsorption equilibrium of residue malachite green on activated carbons.Freundlich constant KF varies with the increase of BET surface area and pore volume.The adsorption property of the self-prepared bamboo-based activated carbon is better than that of the commercial adsorbents.The pseudo-second-order equation is proved to be the best for describing the dynamic adsorption,and the dynamic parameters are calculated and the dynamic parameters are obtained.As for the same kind of adsorbent,temperature has a great influence on the dynamic adsorption rate constant,which is the smallest at 35 ℃.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第4期1287-1291,共5页
Journal of Central South University:Science and Technology
基金
广东省科技计划项目(2009B030802048)
关键词
活性炭
孔雀石绿
吸附平衡
动力学
activated carbon
malachite green
adsorption equilibrium
dynamics
