Study on Preparation of SA/PVA Composite Hydrogel and Adsorption of Co2+ and MB

WU Shu-ming, LIANG Wen-xia, WU Jia-bin

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (09) : 27-31. DOI: 10.15925/j.cnki.issn1005-3360.2024.09.005
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Study on Preparation of SA/PVA Composite Hydrogel and Adsorption of Co2+ and MB

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Abstract

Using sodium alginate (SA), polyvinyl alcohol (PVA) as raw materials, acrylic acid (AA) as monomer to synthesize SA/PVA-g-AA hydrogel, the functional group structure and micromorphology of the hydrogel material were characterized. Using Co2+/MB as the adsorption object, the effects of pH, initial mass concentration, hydrogel addition on the adsorption of hydrogel performance were investigated, and the adsorption dynamics were explored. The results show that SA/PVA-g-AA hydrogel is a porous surface area of 120.896 7 m2/g and an average adsorption pore diameter of 8.069 08 nm which is beneficial to the adsorption of Co2+and MB. The composite hydrogel has a fast adsorption rate for Co2+/MB, and can reach adsorption equilibrium within 60 min, which is consistent with the quasi-second-order kinetic model. The maximum removal rates of Co2+ and MB reaches 95.01%and 98.78%, respectively, when the pH value is 3 and 7, the hydrogel dosage is 0.15 g, and the initial mass concentration is 100 mg/L.

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Sodium alginate / PVA / Composite hydrogel / Co2+ / MB / Dynamics

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WU Shu-ming , LIANG Wen-xia , WU Jia-bin. Study on Preparation of SA/PVA Composite Hydrogel and Adsorption of Co2+ and MB. Plastics Science and Technology. 2024, 52(09): 27-31 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.09.005

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