Noncompetitive Removal of Heavy Metal Ions from Aqueous Solutions by Poly[2-(acrylamido)-2-methyl-1-propanesulfonic acid-co-itaconic acid] Hydrogel
Noncompetitive Removal of Heavy Metal Ions from Aqueous Solutions by Poly[2-(acrylamido)-2-methyl-1-propanesulfonic acid-co-itaconic acid] Hydrogel
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DOI：
10.1021/ie801449k
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发表时间：
2009-03-04
影响因子：
4.2
通讯作者：
Gurdag, Gulten
中科院分区：
文献类型：
--
作者：
Cavus, Selva;Gurdag, Gulten
研究了2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸与衣康酸的共聚物及其均聚物聚[2 -（丙烯酰胺基）2 -甲基- 1 -丙磺酸]从水溶液中对Pb²⁺、Cu²⁺和Cd²⁺离子的非竞争去除。在本研究涉及的离子中，聚[2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸]和聚[2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸 - 衣康酸共聚物]对Pb²⁺离子的去除量最大且相同（1.74毫摩尔Pb²⁺/克聚合物）。聚（2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸）和聚[2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸 - 衣康酸共聚物]的平衡溶胀值表明，共聚物的溶胀由其完全可电离的成分2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸主导。尽管将衣康酸引入聚[2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸]中不影响聚[2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸 - 衣康酸共聚物]对Pb²⁺和Cd²⁺离子的去除速率，但它显著提高了共聚物对Cu²⁺离子的去除速率。离子在聚[2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸]和聚[2 -（丙烯酰胺基）- 2 -甲基- 1 -丙磺酸 - 衣康酸共聚物]上的单离子吸附趋势分别遵循Pb²⁺>Cd²⁺>Cu²⁺和Pb²⁺>Cu²⁺>Cd²⁺的顺序。两种聚合物对Pb²⁺、Cu²⁺和Cd²⁺离子的非竞争吸附曲线均符合准二级动力学。
Noncompetitive removal of Pb2+, Cu2+, and Cd2+ ions from aqueous solutions by the copolymer of 2-(acrylamido)-2-methyl-1-propanesulfonic acid with itaconic acid and its homopolymer poly [2-(acrylamido)2-methyl-1-propanesulfonic acid] was investigated. Both poly[2-(acrylamido)-2-methyl-1-propanesulforlic acid] and poly[2-(acrylamido)-2-methyl-1-propanesulfonic acid-co-itaconic acid] removed the maximum and same amounts (1.74 mmol Pb2+/g polymer) of Pb2+ ion among the ions investigated in this work. The equilibrium swelling values of poly (2-(acryl amido)-2-methyl-1-propanesulfonic acid] and poly [2-(acrylamido)-2-methyl-1-propanesulfonic acid-co-itaconic acid] showed that the swelling of the copolymer is dominated by its completely ionizable constituent 2-(acrylamido)-2-methyl-1-propanesulfonic acid. Although the incorporation of itaconic acid into poly [2-(acrylamido)-2-methyl-1-propane sulfonic acid] did not affect the removal rates of poly [2-(acrylamido)-2-methyl-1-propanesulfonic acid-co-itaconic acid] for Pb2+ and Cd2+ ions, it considerably enhanced the removal rates of the copolymer for the Cu2+ ion. The trends in the single-ion sorption of ions on poly [2-(acrylamido)-2-methyl-1-propanesulfonic acid] and poly [2-(acrylamido)-2-methyl-1-propanesulfonic acid-co-itaconic acid] followed the orders Pb2+ > Cd2+ > Cu2+ and Pb2+ > Cu2+ > Cd2+ respectively. Noncompetitive adsorption profiles of Pb2+, Cu2+, and Cd2+ ions on both polymers were demonstrated to fit the pseudo-second-order-type kinetics.