水葫芦根系对硝基苯吸附过程研究  

Study on Adsorption Process for Nitrobenzene on Water Hyacinth Root

作　　者：张啸[1] 林逢凯[1] 胥峥[1] 

机构地区：[1]华东理工大学资源与环境工程学院,上海200237

出　　处：《上海环境科学》2003年第12期907-910,共4页Shanghai Environmental Sciences

摘　　要：研究了2种温度下水葫芦根系吸附硝基苯的过程。结果表明,在15.25℃时吸附平衡时间约为12h。运用Fleundlich、Langmuir和BET吸附等温式对其根系吸附硝基苯的过程进行模拟,结果为,吸附过程可用Langmuir公式表示的单分子层吸附模型描述;吸附热值-7.6kJ/moL,水葫芦根系吸附硝基苯的主要作用力是范德华力。探讨了水葫芦根系吸附硝基苯的机理。In this paper, the adsorption process of nitrobenzene by water hyacinth root at two different temperatures has been studied. The results showed that the equilibrium times at 15℃ and 25℃ were 12 hours. The adsorption process of nitrobenzene were simulated by Fleundlich, Langmuir and BET adsorption isotherm. It was found that the adsorption process of nitrobenzene belongs to monolayer adsorption and could be well described by Langmuir adsorption isotherm. The adsorption heat equal to -7.6kJ/mol, which suggested that the adsorption was dominated by Van Der Waals force. The mechanism of the adsorption of the water hyacinth root was also discussed.

关 键 词：水葫芦根系 硝基苯 单分子层吸附 水体污染 

分 类 号：X52[环境科学与工程—环境工程] X173