Covalently crosslinked sodium alginate/poly(sodium p-styrenesulfonate) cryogels for selective removal of methylene blue

被引：41
作者：
Yin, Tianyu [1 ]
Zhang, Xinyu [1 ]
Shao, Shuai [1 ]
Xiang, Tao [1 ]
Zhou, Shaobing [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China
来源：
CARBOHYDRATE POLYMERS | 2023年 / 301卷
基金：
中国国家自然科学基金;
关键词：
Cryogels; Alginate; Adsorption capacity; Cationic dyes; Reusability; AQUEOUS-SOLUTIONS; STYRENE-SULFONATE; METAL-IONS; ADSORPTION; DYE; CHITOSAN; MECHANISM; HYDROGELS; KINETICS; MICROSPHERES;
D O I：
10.1016/j.carbpol.2022.120356
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Adsorbents with high adsorption capacity, sustainability, and reusability are desired in wastewater treatments. Herein, covalently crosslinked microporous cryogels with efficient removal of cationic dyes are fabricated by freezing radical copolymerization using methacrylated alginate (AlgMA) and sodium p-styrenesulfonate (NaSS). The chemical structure, morphology, and thermal stability of the AlgMA/PNaSS cryogels are characterized. Compared with the AlgMA/PNaSS hydrogels with the same chemical composition fabricated by thermal-initiated polymerization, the cryogels show higher adsorption of methylene blue. The AlgMA/PNaSS (with a mass ratio of 1:2) possesses the maximum adsorption capacity for MB with 2300 mg/g under alkaline condition. In addition, the adsorption process of AlgMA/PNaSS cryogels fits the pseudo-second order model and Freundlich model, respectively. The AlgMA/PNaSS cryogels also reveal selective adsorption capacity and reusability after regeneration, which own unchanged corrected adsorption capacity during five adsorption-desorption cycles. The AlgMA/PNaSS cryogels show great potential for use in wastewater treatments and intelligent separation.
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页数：11
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