皂化和酯化改性甜菜粕的吸附性能研究  

Adsorptive Capacity of Methylene Blue by Saponification and Esterification Modification of Sugar Beet Pulp

作　　者：张小雨 谢流杰 张艳霞 郭丽君 王玉涛 ZHANG Xiaoyu;XIE Liujie;ZHANG Yanxia;GUO Lijun;WANG Yutao(College of Life and Geographic Sciences,Kashi University,Kashi 844000,China;Key Laboratory of Biological Resources and Ecology of Pamirs Plateau in Xinjiang Uygur Autonomous Region,Kashi 844000,China)

机构地区：[1]喀什大学生命与地理科学学院,新疆喀什844000 [2]喀什大学新疆帕米尔高原生物资源与生态重点实验室,新疆喀什844000

出　　处：《生物质化学工程》2024年第2期39-46,共8页Biomass Chemical Engineering

基　　金：喀什大学创新团队建设项目((17)2602)。

摘　　要：为探究甜菜粕(SBP)对亚甲基蓝的最佳吸附工艺条件,本研究对甜菜粕进行皂化改性和脂化改性,分别获得皂化改性甜菜粕(SSBP)和柠檬酸酯化改性甜菜粕(CDSBP),探究两种改性甜菜粕对亚甲基蓝的最佳吸附工艺条件和动力学。结果表明:SSBP最佳吸附工艺条件为亚甲基蓝质量浓度300 mg/L,溶液pH值7,吸附温度60℃,吸附时间60 min,吸附量为277.75 mg/g;CDSBP最佳吸附工艺条件为亚甲基蓝质量浓度400 mg/L,溶液pH值8,吸附温度60℃,吸附时间90 min,吸附量最大值为322.4 mg/g,相比较,CDSBP的吸附性能较好。SSBP和CDSBP对亚甲基蓝的吸附过程均符合假二级动力学模型和Langmuir模型,吸附过程主要机制可能为离子交换。SSBP和CDSBP中羟基对提高吸附性能有着重要作用,通过改性处理可以显著增加这些官能团数量,使吸附性能大大提高。To explore the optimum adsorption conditions of methylene blue by sugar beet pulp(SBP),the beet pulp was saponified and modified to obtain saponification modified sugar beet pulp(SSBP)and citric acid esterification modified sugar beet pulp(CDSBP),respectively.The optimum adsorption conditions and kinetics of methylene blue by SSBP and CDSBP were explored.The results showed that the optimum adsorption conditions of SSBP were as follows:the concentration of methylene blue was 300 mg/L,the solution pH value was 7,the adsorption temperature was 60℃,the adsorption time was 60 min,and the adsorption capacity was 277.75 mg/g.The optimum adsorption conditions of CDSBP were as follows:the concentration of methylene blue was 400 mg/L,the solution pH value was 8,the adsorption temperature was 60℃,the adsorption time was 90 min,and the maximum adsorption capacity was 322.4 mg/g.In contrast,the adsorption performance of CDSBP was better.The adsorption process of methylene blue by SSBP and CDSBP conformed to the pseudo-second-order kinetic model and the Langmuir model,and the main mechanism might be ion exchange.The key chemical groups such as hydroxyl and carbonyl groups in SSBP and CDSBP played an important role in improving the adsorption performance.The number of these functional groups could be significantly increased by modification treatment,so that the adsorption performance was greatly improved.

关 键 词：甜菜粕 亚甲基蓝 吸附性能 柠檬酸酯化改性 皂化改性 

分 类 号：TQ35[化学工程] TQ9