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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,用于吸附水中微量Cu2+。考察了溶液pH值、吸附时间、吸附剂量等因素对Cu2+吸附性能的影响。结果表明,利用海藻酸钠对多壁碳纳米管进行改性,提高了分散性、比表面积和孔径。当pH值为5.8时,吸附量随着吸附时间的增长而增大,80 min内达到了吸附平衡,且吸附率随着吸附剂量的增加而增大,表明海藻酸钠修饰后的碳纳米管是一种有效的水溶液中Cu2+吸附剂。
Carbon nanotubes (CNTs) were modified and modified by sodium alginate (SAL) using 1-ethyl-3 (3-dimethylaminopropyl) carbodiimide (EDC) Preparation of sodium alginate / carbon nanotube gel for adsorption of Cu2 + in water. The effects of pH value, adsorption time and amount of adsorbent on the adsorption properties of Cu2 + were investigated. The results show that the use of sodium alginate multi-walled carbon nanotubes modified to improve the dispersion, specific surface area and pore size. When the pH value is 5.8, the adsorption capacity increases with the increase of adsorption time and reaches the adsorption equilibrium within 80 min, and the adsorption rate increases with the increase of adsorbent dosage, indicating that sodium alginate modified carbon nanotubes Is an effective aqueous solution of Cu2 + adsorbent.