摘要
采用硫脲改性榴莲壳,制备新型的改性榴莲壳吸附剂,研究其对Pb2+、Cd2+的吸附性能。结果表明,吸附Pb2+、Cd2+的适宜条件为:pH 6.0,吸附时间60 min。改性后榴莲壳吸附剂对Pb2+、Cd2+的吸附容量能有了很大程度的提高,Pb2+、Cd2+最大吸附量分别达到53.63、34.84 mg.g-1。吸附过程可以很好地用准二级动力学方程描述,吸附等温线用Langmuir方程的拟合效果优于Freundlich方程。
The new modified durian shell（DS） adsorbent was prepared by using thiourea,the adsorption behavior of Pb2＋ and Cd2＋ on durian shell was studied.The result showed that pH 6.0 and shaking time 60 min were the optimal conditions for adsorption of Pb^2＋ and Cd^2＋.The adsorption capacity of adsorbent could be greatly improved after modified.The maximum adsorption capacity of Pb^2＋ and Cd^2＋ reached up to 53.63 and 34.84 mg·g^-1,respectively.The adsorption process followed a pseudo-second order equation and the equilibrium isotherm was described by the Langmuir model rather than by the Freundlich model.
出处
《西南农业学报》
CSCD
北大核心
2012年第1期266-270,共5页
Southwest China Journal of Agricultural Sciences
基金
闽江学院科技启动项目(YKQ1005)
关键词
榴莲壳
硫脲
改性
吸附
重金属
Durian shell
Thiourea
Modification
Adsorption
Heavy metals
