海藻酸钠-锌自修复水凝胶的制备及其对亚甲基蓝的吸附性能（英文）  

殧Preparation of Sodium Alginate-Zinc Self-Healing Hydrogel and Its Adsorption Properties for Methylene Blue

作　　者：艾尼娃·木尼热 马玉花 朱恩权 粟智[1] Ainiwaer-Munire;Ma Yuhua;Zhu Enquan;Su Zhi(College of Chemistry and Chemical Engineering,Xinjiang Normal University,Urumqi 830054)

机构地区：[1]新疆师范大学化学化工学院

出　　处：《化学通报》2019年第12期1086-1092,1057,共8页Chemistry

基　　金：新疆维吾尔自治区自然科学基金项目(2019D01B36,2019D01A69);新疆维吾尔自治区“天山青年计划”优秀青年科技人才项目(2017Q027);自治区“百名青年博士引进计划”天池博士项目(BS2017002);自治区高校科研计划项目(XJEDU2018Y030);新疆师范大学“十三五”校级重点学科招标课题(17SDK0802);新疆师范大学博士科研启动基金(XJNUBS1907)资助

摘　　要：废水处理中迫切需要制备多重刺激响应和具有自修复性能的吸附剂。基于此,本文选择海藻酸钠(ALG)和锌离子(Zn2+)为原料,通过一步法快速(仅2s)制备了超分子水凝胶。所制备的水凝胶显示出多重刺激(pH、金属盐等)响应性和自修复性能,这对吸附有机污染物至关重要。选择亚甲基蓝(MB)为模型染料研究了水凝胶的吸附性能。水凝胶对MB的最大吸附量为5. 3mg/g,对低浓度污染物具有良好的吸附能力(去除率超过80%)。吸附动力学均符合准二级动力学方程,Freundlich模型能很好地拟合等温吸附过程,表明ALGZn水凝胶对MB的吸附以多层吸附为主。制备出的ALG-Zn水凝胶适合作为吸附剂应用于废水处理。There is an urgent need in the wastewater treatment to prepare adsorbent with multiple stimuli and self-healing properties. Herein,an injectable supramolecular hydrogel was formed by sodium alginate(ALG) and zinc ions(Zn2+),and the procedure was very simple(Zn2+dropped directly into ALG) and fast(only 2 s). The as-prepared hydrogel showed multi-stimuli(pH,metal salts,etc.) responsiveness and self-healing properties,which are crucial for highly efficient organic pollution adsorption. Furthermore,the adsorption performance of the hydrogel was investigated with methylene blue(MB) as model dye. The maximum MB adsorption capacity of hydrogel is5. 3 mg/g,and it has good adsorption capacity for low concentration pollutants(removal rate exceeds 80%). The adsorption kinetics were in accordance with the pseudo-second-order kinetic equation,and the Freundlich model could well fit the isothermal adsorption process,indicating that the adsorption of MB by ALG-Zn hydrogel is dominated by multi-layer adsorption. The prepared ALG-Zn supramolecular hydrogel as a popular adsorbent could be applied in wastewater treatment.

关 键 词：超分子水凝胶 自修复 多重刺激响应 吸附 

分 类 号：O647.33[理学—物理化学] TQ427.26[理学—化学] X703[化学工程]