Adsorption of heavy-metal ions on Cibacron Blue F3GA-immobilized microporous polyvinylbutyral-based affinity membranes
Adsorption of heavy-metal ions on Cibacron Blue F3GA-immobilized microporous polyvinylbutyral-based affinity membranes
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DOI：
10.1016/s0376-7388(97)00172-5
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发表时间：
1997-12-24
影响因子：
9.5
通讯作者：
Piskin, E
中科院分区：
文献类型：
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作者：
Denizli, A;Tanyolac, D;Piskin, E
采用溶剂浇铸法制备了聚乙烯醇缩丁醛微孔膜。然后固定亲和染料，即汽巴克隆蓝F3 GA。这些具有89%的高含水量和承载3.3 mmol Cibacron Blue F3 GA/m（2）膜的亲和膜用于从含有不同量的这些离子（0.024-4.60 mmol/l）和不同pH值（2.0-9.0）的水性介质中吸附/反萃取一些选定的重金属离子（例如Cu（II）、Zn（II）、Cd（LI）和Pb（LI））。吸附速率很高，在约100 ℃时达到吸附平衡。Cibacron Blue F3 GA固定化亲和膜对Cu（II）、Zn（II）、Cd（II）和Pb（II）的最大吸附量分别为7.0 mmol/m2、16.8 mmol/m2、22.2 mmol/m2和34.2 mmol/m2。当重金属离子竞争吸附时（从它们的混合物中吸附的情况下），观察到类似的行为，亲和力的顺序为Pb（II）> Cd（II）> Zn（II）> Cu（II）。重金属离子再生，通过使用0.1 M硝酸在30分钟内实现。据观察，重金属离子可以重复吸附和剥离，而不会显着损失的吸附容量。(C)1997年Elsevier Science B.V.
Microporous polyvinylbutyral membranes were prepared by a solvent-casting technique. An affinity dye, i.e. Cibacron Blue F3GA was then immobilized. These affinity membranes with a high water content of 89%, and carrying 3.3 mmol Cibacron Blue F3GA/m(2) membrane were used in the adsorption/stripping of some selected heavy-metal ions (e.g. Cu(II), Zn(II), Cd(LI) and Pb(lI)) from aqueous media containing different amounts of these ions (0.024-4.60 mmol/l) and at different pH values (2.0-9.0). Adsorption rates were very high, and adsorption equilibria were reached in ca. 15 min. The maximum adsorptions of heavy-metal ions onto the Cibacron Blue F3GA-immobilized affinity membranes from their single solutions were 7.0 mmol/m(2) for Cu(II), 16.8 mmol/m(2) for Zn(II), 22.2 mmol/m(2) for Cd(II), and 34.2 mmol/m(2) for Pb(II). Similar behavior was observed when the heavy-metal ions competed (in the case of the adsorption from their mixture), the order of affinity was Pb(II) > Cd(II) > Zn(II) > Cu(II). Heavy-metal ions regeneration was achieved by using 0.1 M HNO3 in 30 min. It was observed that heavy-metal ions could be repeatedly adsorbed and stripped without significant loss in adsorption capacity. (C) 1997 Elsevier Science B.V.