多糖水凝胶富含丰富官能团,可为亚甲基蓝(MB)染料的去除提供吸附位点,具有重要的应用价值和广阔的前景。然而,未改性的多糖水凝胶吸附能力较差,通过化学改性或物理改性后其活性基团增多、比表面积增大,对MB的吸附效果显著提高。从多糖水凝胶的结构和性质出发,介绍了静电吸附、氢键和π-π相互作用3种吸附机理,总结归纳了纤维素、壳聚糖、海藻酸钠和琼脂这4种多糖水凝胶的特点,最后对多糖水凝胶吸附MB的研究方向进行了展望。
Polysaccharide hydrogels are rich in functional groups,which can provide adsorption sites for the removal of methylene blue (MB) dyes,and have important application value and broad prospects.However,the adsorption capacity of unmodified polysaccharide hydrogels is low,and the adsorption effect of MB can be significantly improved by increasing the active group and specific surface area after chemical modification or physical modification.Based on the structure and properties of polysaccharide hydrogels,three adsorption mechanisms,namely,electrostatic adsorption,hydrogen bonding and π-π interaction,were introduced.The characteristics of four polysaccharide hydrogels,namely cellulose,chitosan,sodium alginate and agar,were summarized.Finally,the future research direction of polysaccharide hydrogels for MB adsorption was prospected.
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基金资助
国家自然科学基金(51504004);安徽省教育厅重点项目(KJ2015A118);生物膜法水质净化及利用技术教育部工程研究中心开放基金(BWPU2022KF05);大学生创新创业训练计划(S202310360166,S202310360156,2022005Y,2022004Z)
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