摘要
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p H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p H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%。
Using 1- ethyl- 3（ 3- dimethylamino- propyl） carbodiimide（ EDC） as a coupling agent,surface 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 p H value influenced the adsorption amount of phosphorus greatly. The maximum adsorption was achieved at an optimum p H value of 6. 5.
出处
《化工时刊》
CAS
2015年第11期1-6,共6页
Chemical Industry Times
基金
2015年江苏省高等学校大学生实践创新项目(201511460047X)
2013年连云港市科技攻关项目(CG1304-2)
关键词
多壁碳纳米管
海藻酸钠
磷
吸附
multi-walled carbon nanotubes
sodiumalginate
phosphorus
adsorption
