Preparation of ion exchange resin using soluble starch and acrylamide by graft polymerization and hydrolysis
2019
Zhang, Ming | Lan, Guihong | Qiu, Haiyan | Zhang, Tailiang | Li, Wenjing | Hu, Xiuqiong
Based on soluble starch and acrylamide by performing graft polymerization in aqueous solution and hydrolysis step, a low-cost ion exchange resin has been synthesized to remove the heavy metal ions of Cr³⁺ and Ni²⁺. The hydrolysis progresses by adding NaOH to convert -CONH₂ to -COONa, and the adsorption experiments confirmed that the functional group to adsorb heavy metals is -COO⁻, rather than -CONH₂. During the determination of heavy metal adsorption, the Na⁺ concentration diffused by SR-16 into the solution was also analysed to investigate the ion exchange process. The composition and morphology of SR-16 was characterized by FT-IR, SEM, elemental analyser and EDS, and the results showed that SR-16 has an excellent adsorption capacity to the removal of heavy metal pollution; the adsorption mechanism of SR-16 could be explained by ion exchange progress with -COONa attached on the network structure.
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