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首页> 外文期刊>RSC Advances >Wool graft polyacrylamidoxime as the adsorbent for both cationic and anionic toxic ions from aqueous solutions
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Wool graft polyacrylamidoxime as the adsorbent for both cationic and anionic toxic ions from aqueous solutions

机译：羊毛接枝聚丙烯酰胺肟作为水溶液中阳离子和阴离子有毒离子的吸附剂

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摘要

Wool graft polyacrylamidoxime (W-g-PAO) was synthesized using coarse wool as the raw keratin material and the graft polymerization parameters were optimized. The adsorption properties of W-g-PAO for both cationic and anionic toxic ions from aqueous solutions were investigated. It was found that both cationic and anionic toxic ions can be effectively adsorbed by W-g-PAO. The adsorption followed the pseudo-second-order kinetics model for both cations and anions, and can be well depicted by Langmuir isotherm model. The equilibrium adsorption capacity (Q(e)) increases with the rising initial concentration of toxic ions. The adsorption capacity followed the order of Hg2+ > Pb2+ > AsO2- > AsO43- > Cd2+. W-g-PAO can be regenerated after adsorption, and the adsorption capacity slightly decreased with the increase in the regenerated cycles. Besides providing a cheap and excellent adsorbent for the removal of both cationic and anionic toxic ions from waste water, the method can be extended to the modification of other waste raw keratin materials, by which the waste raw keratin materials can be used as a valuable blocks for the fabrication of functional materials.
机译：以粗羊毛为角蛋白原料，合成了羊毛接枝聚丙烯酰胺肟（W-g-PAO），并优化了接枝聚合参数。研究了W-g-PAO对水溶液中阳离子和阴离子有毒离子的吸附性能。发现W-g-PAO可以有效地吸附阳离子和阴离子毒性离子。吸附遵循阳离子和阴离子的拟二级动力学模型，并且可以通过Langmuir等温线模型很好地描述。平衡吸附容量（Q（e））随着有毒离子初始浓度的增加而增加。吸附能力遵循Hg2 +> Pb2 +> AsO2-> AsO43-> Cd2 +的顺序。吸附后可以再生W-g-PAO，随着再生周期的增加，吸附量略有下降。除了提供廉价，优异的吸附剂以去除废水中的阳离子和阴离子有毒离子外，该方法还可以扩展到改性其他废角蛋白原料，从而可以将废角蛋白原料用作有价值的嵌段用于功能材料的制造。

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