粘土吸附剂的除铅性能及热力学研究

ADSORPTION AND THERMODYNAMICS OF CLAYADSORBENIS FOR LEAD IONS REMOVAL

本文报道了粘土吸附剂自溶液中吸附铅的吸附性能及热力学性能．该吸附剂吸附铅的最佳处理条件为：用３ＭＨ２ＳＯ４振荡处理４ｈ，然后在２００℃下培烧２ｈ，该吸附为放热过程．饱和吸附量为１６．８ｍｇ／ｇ，符合Ｌａｎｇｍｕｉｒ吸附等温线，其吸附热为－６０９．６Ｊ／ｍｏｌ．

This paper has studied the adsorption and thermody namics of clay adsorbents which adsorb lead ions in the solution The best conditions for treating adsorbents in 3 mol l sulfuric acid solution for four hours and heating for two hours at 200℃.The adsorption process was exothermic and conformed to langmuir isothermal line, △H=-609.6J/mol. the maxium adsorbance qm16.8mg/g.