木聚糖基水凝胶对亚甲基蓝吸附性能研究  

Study on Adsorption Properties of Xylan-Based Hydrogels for Methylene Blue

作　　者：胡鑫鑫[1] 梁志[1,2] 王丹菊 HU Xin-xin;LIANG Zhi;WANG Dan-ju(Department of Chemical Engineering,Maoming Vocational and Technical College,Maoming 525028,China;Guangdong Fine Chemicals(West Guangdong)Engineering Technology Research Center,Maoming 525028,China)

机构地区：[1]茂名职业技术学院化学工程系,广东茂名525028 [2]广东省精细化学品(粤西)工程技术研究中心,广东茂名525028

出　　处：《塑料科技》2024年第7期52-57,共6页Plastics Science and Technology

基　　金：2020年广东省科技专项资金(“大专项+任务清单”)项目(2020S00062);2021年度广东省普通高校特色创新类项目(2021KTSCX325);2021年广东省高职教育创新创业训练计划项目。

摘　　要：以木聚糖为原料,以丙烯酸、N-异丙基丙烯酰胺为功能单体,N,N'-亚甲基双丙烯酰胺为交联剂,采用接枝聚合,制备了木聚糖基水凝胶。利用FTIR分析木聚糖基水凝胶的结构,并研究pH值、吸附剂用量、亚甲基蓝初始质量浓度、吸附时间对亚甲基蓝吸附性能的影响。结果表明:水凝胶去除亚甲基蓝的最佳pH值范围为3~6;吸附平衡时间约为150 min。木聚糖基水凝胶对亚甲基蓝的吸附性能良好,其对≤600 mg/L亚甲蓝溶液吸附去除率高达97%。木聚糖基水凝胶对亚甲基蓝的吸附行为符合动力学假二级模型和langmuir等温吸附模型,根据Langmuir吸附模型计算出的最大吸附量可达1094 mg/g。木聚糖基水凝胶表现出良好的再生回用性能,可作为生物质吸附剂用于亚甲基蓝废水处理。Xylan-based hydrogels were prepared by the crosslinking copolymerization of xylan with acrylic acid and Nisopropylacrylamide using N,N'-methylenebis-acrylamide as a cross-linker.The structure of the xylan-based hydrogel was analyzed by FTIR and the effects of pH value,adsorbent dosage,initial mass concentration of the methylene blue,and contacting time on adsorption capacities of methylene blue were studied.The results showed that the optimal pH value range for removing methylene blue by hydrogel was 3~6,and the adsorption equilibrium time was about 150 min.The xylan-based hydrogel had good adsorption performance for methylene blue,and its adsorption removal rate for methylene blue solution(≤600 mg/L)was as high as 97%.The adsorption behavior of methylene blue on hydrogels was in accordance with the pseudo-second order kinetic model and Langmuir isothermal adsorption model.According to the Langmuir adsorption model,the maximum adsorption capacity can reach 1094 mg/g.The xylan-based hydrogel showed good performance of regeneration and reuse,and can be used as biomass adsorbent for methylene blue wastewater treatment.

关 键 词：水凝胶 N-异丙基丙烯酰胺 丙烯酸 亚甲基蓝 生物质吸附剂 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]