以羧甲基纤维素钠（CMC）为共聚骨架，丙烯酰胺（AM）、2-丙烯酰胺基-2-甲基丙磺酸钠（AMPS）和2-丙烯酰胺基十四烷基磺酸钠（NaAMC₁₄S）为接枝单体，过硫酸铵（APS）为引发剂，N，N-亚甲基双丙烯酰胺（MBA）为交联剂，采用水溶液聚合法合成了一种新型CMC-g-poly （AM-co-AMPS-co-NaAMC₁₄S）高吸水树脂，并添加氢氧化钠（NaOH）与酰胺基发生水解反应，使得酰胺基（—CONH₂）变成羧酸根（—COO^-）。通过单因素优选法筛选出树脂对Cu²⁺、Pb²⁺的最佳吸附条件。当pH为4、吸附时间为12 h、树脂质量分数为0.01%时，CMC-g-poly高吸水树脂对Cu²⁺、Pb²⁺去除率可分别达到85.89%、82.09%，展示出极好的吸附性能。吸附动力学表明，该吸附过程受化学吸附控制。重金属离子可以有效地被CMC-g-poly树脂吸附。

Using sodium carboxymethyl cellulose (CMC) as copolymer skeleton,acrylamide (AM),2-acrylamide-2-methylpropanesulfonate sodium (AMPS) and sodium 2-acrylamide-tetradecyl sulfonate (NaAMC₁₄S) as grafting monomers,ammonium persulfate (APS) as initiator,and N,N'-methylene bi-acrylamide (MBA) as crosslinking agent,a new type of super absorbent polymer CMC-g-poly(AM-co-AMPS-co-NaAMC₁₄S) is synthesized through aqueous solution polymerization method.Sodium hydroxide is added to react with amide group so that the amide group (-CONH₂) in the polymer becomes carboxylic acid (-COO^-).The optimal conditions for adsorption of Cu²⁺ and Pb²⁺ by the obtained super absorbent polymer are selected by means of single factor optimization method.The results show that the removal rates of Cu²⁺ and Pb²⁺ by CMC-g-poly(AM-co-AMPS-co-NaAMC₁₄S) can reach 85.89% and 82.09%,respectively when both Cu²⁺ and Pb²⁺ concentrations are 200 ppm,pH is 4,adsorption time is 12 h,and the dosage of the polymer is 0.01 wt%.Adsorption kinetics indicates that the adsorption process is controlled by chemisorption.Heavy metal ions can be effectively adsorbed by CMC-g-poly(AM-co-AMPS-co-NaAMC₁₄S).

邱海燕(1976-),女,硕士,副教授,研究方向为有机合成,windqq2002@163.com