聚苯乙烯乙酰化苯丙氨酸型树脂对Ni^(2+)的螯合性能

Chelating Properties of Ni^(2+) on Phe Resin

用氯乙酰化聚苯乙烯(Chloroacetylized Polystyrene,PS-Acyl-Cl)树脂替代氯甲基树脂与苯丙氨酸(Phenylalanine,Phe)反应制备了PS-Acyl-Phe型螯合树脂,并研究了该树脂在pH、螯合时间、Ni2+浓度等不同条件下对Ni2+的螯合性能,得到了Ni2+型介质的最佳螯合条件:Ni2+溶液浓度为0.1mol/L,pH为3.5～9.0,螯合时间5h,此时树脂的最高螯合量为0.91mmol/g,Phe螯合效率为40.8%.

A new L-phenylalanine resin （PS-Acyl-Phe） was prepared by chloroacetylated polystyrene （PS-Acyl-Cl） instead of merrifield resin （PS-CH2-Cl） and applied for chelating Ni^2＋. The effects ofpH, chelating time and concentration of Ni^2＋ on the chelating reaction were investigated for the optimal chelating condition. The results show that under the optimal conditions of Ni^2＋ concentration 0.1 mol/L, pH 3.5-9.0, and chelating time 1 h, the chelating rate could be up to 40.8%.