自愈水凝胶
发泡剂
铜
吸附
肿胀 的
化学工程
镉
丙烯酰胺
水溶液中的金属离子
金属
丙烯酸
化学
镍
核化学
高分子化学
多孔性
聚合物
有机化学
共聚物
工程类
作者
Ann Pille,Marie‐Josée Dumont,Jason Robert Tavares,Ranjan Roy
标识
DOI:10.1016/j.jece.2022.107310
摘要
The physical and chemical properties of hydrogels are greatly dictated by their composition. In this study, modifications were brought to the macroscopic structure of hydrogels using foaming additives, and their effects on the swelling capacity and heavy metal adsorption were investigated. Significant differences in swelling capacities were found for hydrogels synthesized with a foaming agent and a foam stabilizer (257 g/g), with a foaming agent without foam stabilizer (195 g/g), or without any additives (182 g/g). The study compared the ion removal capacity for copper (II), cadmium (II), and nickel (II) under competitive and non-competitive conditions. The use of a foaming agent significantly increased the ion removal capacity of the hydrogels, from 54 to 93 mg/g cadmium, from 75 mg/g to 104 mg/g copper, and from 48 mg/g to 80 mg/g nickel. Under competitive conditions, the hydrogels preferentially removed cadmium > copper > nickel. However, maximum removal decreased for individual heavy metals under competitive conditions.
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