纤维素基磁性聚偕胺肟树脂的研究——锌副族金属离子在树脂上的吸附  

Studies on Cellulose-Based Magnetic Polyamidoxime Adsorbents—Adsorption of BMAO for Ⅱb Subgroup Ions

作　　者：吴锦远[1] 杨超雄[1] 

机构地区：[1]中国科学院广州化学研究所

出　　处：《功能高分子学报》1998年第2期193-198,共6页Journal of Functional Polymers

基　　金：中国科学院广州化学研究所纤维素化学开放研究实验室课题

摘　　要：研究了Ｚｎ２＋、Ｃｄ２＋、和Ｈｇ２＋离子在碱式纤维素基磁性聚偕胺肟树脂（ＢＭＡＯ）上的吸附动力学。结果表明，吸附速度受粒内扩散所控制。测得粒内扩散系数分别是１．２２×１０－４、２．４２×１０－４和３．９０×１０－４ｃｍ２·ｓ－１；Ｈｇ２＋离子在树脂上的吸附行为符合Ｆｒｅｕｎｄｌｉｃｈ和Ｌａｎｇｍｕｉｒ等温吸附方程；浓集因数随Ｈｇ２＋离子浓度降低而上升，有利于从稀溶液中除去Ｈｇ２＋离子。将树脂加至Ｚｎ２＋、Ｃｄ２＋或Ｈｇ２＋离子浓度为５０ｐｐｍ的溶液中，离子去除率分别是９６．１、９９．９和９９．３％。The adsorption kinetics of alkaline cellulose-based magnetic polyamidoxime adsorbent (BMAO) for Zn2+, Cd2+ and Hg2+ ions were investigated. The results showed that the adsorption rate was controlled by intra-particle diffusion, the intraparticle diffusion coefficients were found to be 1.22×10-4, 2.42×10-4 and 3.90×10-4 cm2.s-1,respectively.The adsorption behavior of Hg2+ ions by BMAO is in accord with Freundlich equation and Langmuir adsorption isotherm. The concentration factor increases with decreasing concentration of Hg2+ion, it favors to remove the Hg2+ ions from the dilute solution. When BMAO was added into the 50ppm ionic solution, the ratio of ion removal are 96.1, 99.9 and 99.3 percent, respectively.

关 键 词：吸附剂 磁性树脂 聚偕胺肟 锌 镉 汞 废水处理 

分 类 号：X703[环境科学与工程—环境工程] O647.33[理学—物理化学]