Using 1-ethyl -3 (3 - dimethylamino-propyl) carbodiimide ( EDC) as a coupling agent, sur-face properties were improved by sodium alginate in order to preparate gel of SAL-MWCNT-COOH that was used to adsorb trace phosphorus. The results showed that the adsorption of phosphorus by SAL -MWCNT -COOH met the Langmuir isohterm equation,and the adsorption kinetics was represented by second-order models. The solution pH value influenced the adsorption amount of phosphorus greatly. The maximum adsorption was achieved at an optimum pH value of 6 . 5 .%以1-乙基 -3(3 -二甲基氨基丙基)碳化二亚胺(EDC)为相偶联剂,通过海藻酸钠(SAL)对碳纳米管( CNTs)进行修饰和改性,制备海藻酸钠-碳纳米管凝胶, 并研究了海藻酸钠-碳纳米管凝胶对水中磷的吸附特征.实验结果表明磷在海藻酸钠-碳纳米管凝胶中的吸附等温线符合Langmuir 方程,吸附过程符合准二级反应动力学模型,溶液pH值显著影响磷在海藻酸钠-碳纳米管凝胶中的吸附效果,在室温、溶液pH值6. 5、海藻酸钠-碳纳米管凝胶投入量1. 25 g/L、吸附时间120 min条件下,海藻酸钠-碳纳米管凝胶对水中磷的吸附量为86. 78 mg/g,水中磷去除率为82. 5%.
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