吸附
羧甲基纤维素
自愈水凝胶
聚丙烯酸
朗缪尔吸附模型
化学
丙烯酸
三元运算
化学工程
淀粉
核化学
甲基橙
纤维素
单层
高分子化学
单体
有机化学
聚合物
钠
催化作用
计算机科学
工程类
程序设计语言
生物化学
光催化
作者
Haihua Li,Guan Jingyu,Yang Yuqi,Zheng Yuxuan,Yuhua Gao,Meifang Yan,Li Na,Zhang Li-hui,Ma Shengxiu,Chen Chen,Jian Liu,Mei Shuxing,Shasha Wang
标识
DOI:10.1002/cctc.202401034
摘要
Abstract Biomass‐based hydrogels can be used as the adsorbents in sewage water, as they have good adsorption capacity for heavy ions and dyes. A ternary‐grafted starch‐based hydrogel, St 1.0 /CMC 0.5 /P(AM 3.0 ‐AA 5.0 ‐AMPS 1.0 ), was prepared using cornstarch (St) and sodium carboxymethyl cellulose (CMC) as raw materials, with acrylamide (AM), acrylic acid (AA), and 2‐acrylamido‐2‐methylpropane sulfonic acid (AMPS) as graft monomers. Due to the introduction of CMC and AMPS, the number and type of effective adsorption functional groups in the St 1.0 /CMC 0.5 /P(AM 3.0 ‐AA 5.0 ‐AMPS 1.0 ) hydrogel increased, leading to an improved adsorption capacity and removal rate for methylene blue (MB). The maximum adsorption capacity and removal rate for MB could be 1624.49 mg/g and 91.8 %, respectively, at 25 °C. According to the adsorption isotherm and adsorption kinetics, the MB adsorption process on the hydrogel occurs according to the Langmuir isotherm model and quasi‐second‐order kinetics via a chemisorption process occurring on the adsorbent monolayer. Moreover, the St 1.0 /CMC 0.5 /P(AM 3.0 ‐AA 5.0 ‐AMPS 1.0 ) hydrogel displayed good regeneration performance. The removal rate for MB could still achieve 84.3 % after the hydrogel was reused four times.
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