Abstract:

Poly（acrylic acid-co-acrylamide）（PAAAM）resin was prepared from acrylic acid（AA）and acrylamide（AM）by inverse suspension polymerization.The adsorption of metal ions on PAAAM resin differed greatly at different pH values and initial concentrations.This provided a theoretical basis for the application of PAAAM resin to separate transitional metal ions Cu²⁺，Ni²⁺，Co²⁺.The selectivity for competitive adsorption on PAAAM resin in Cu²⁺ ，Ni²⁺ and Co²⁺ binary and ternary mixed ion solutions were investigated.It was found that there was higher selectivity on PAAAM resin for Cu²⁺ ions compared with other metal ions used in this study.

摘要： 用反相悬浮聚合法合成了聚丙烯酸/丙烯酰胺高吸水性树脂(PAAAM)，讨论了其吸附CuCl₂、NiCl₂、CoCl₂溶液中金属离子的性能，考察了溶液pH值和初始浓度对金属离子吸附的影响。结果表明，PAAAM在不同pH值及浓度区间，对金属离子的吸附能力有较大差异，可被用于Cu(II)、Ni(II)、Co(II)的分离。同时还探讨了PAAAM在混合金属离子溶液中的吸附性能及反复利用的可能性，发现在混合溶液中PAAAM表现出对Cu（II）有较好的选择性吸附能力；4次循环后对Cu(II)、Ni(II)、Co(II) 离子的吸附量为最大吸附量的80%以上，重复使用效果理想。