改性西瓜皮基碳气凝胶吸附亚甲基蓝性能研究
Study on adsorption of methylene blue by modified watermelon peel-based carbon aerogels
黄洁萍 1池明 1刘亚东 1张卫华 1薛聪1
作者信息
- 1. 天津农学院园艺园林学院,天津 300392
- 折叠
摘要
为探究NaOH/H3PO4改性碳气凝胶对亚甲基蓝的吸附性能,本试验采用化学活化法对西瓜皮基碳气凝胶进行改性处理,通过批量试验研究亚甲基蓝的溶液pH值、溶液初始质量浓度、凝胶吸附时间和凝胶投入量对NaOH/H3PO4改性西瓜皮基碳气凝胶吸附效果的影响.试验结果表明:改性碳气凝胶对亚甲基蓝的吸附量随pH的升高而降低,当pH=8时,改性碳气凝胶对亚甲基蓝的吸附效果最好.适量延长凝胶吸附时间、提高溶液初始质量浓度、增加凝胶投入量可以改善改性碳气凝胶的吸附量.在染料溶液pH=8,初始质量浓度为50 mg/L,吸附时间12 h,凝胶投入量5 mg/mL的条件下,NaOH改性凝胶的吸附量达7.51 mg/g,H3PO4改性凝胶的吸附量达4.29 mg/g,其吸附量均高于未改性碳气凝胶吸附量,说明酸碱改性均能提高西瓜皮基碳气凝胶的吸附性能.
Abstract
In order to explore the adsorption performance of carbon aerogels modified by NaOH/H3PO4 for methylene blue,carbon aerogels was modified by chemical activation method.The effects of pH value of methylene blue solution,initial concentration of solution,gel adsorption time and gel dosage on the adsorption effect of carbon aerogels modified by NaOH/H3PO4 were studied through batch experiments.The experimental results showed that the adsorption capacity of modified carbon aerogels for methylene blue decreased with the increase of pH,and the adsorption effect of modified carbon aerogels for methylene blue was the best when pH=8.The adsorption capacity of modified carbon aerogels could be improved by prolonging the gel adsorption time,increasing the initial concentration of solution and increasing the gel input.Under the conditions of dye solution pH=8,initial concentration 50 mg/L,adsorption time 12 h and gel input 5 mg/mL,the adsorption capacity of NaOH modified gel could reach 7.51 mg/g,and that of H3PO4 modified gel can reach 4.29 mg/g,both of which were higher than that of unmodified carbon aerogels,it indicates that acid-base modification can improve the adsorption performance of watermelon peel-based carbon aerogels.
关键词
西瓜皮/碳气凝胶/亚甲基蓝/吸附Key words
watermelon peel/carbon aerogels/methylene blue/adsorption引用本文复制引用
基金项目
国家自然科学基金青年计划(31902094)
天津农学院科学研究发展基金(2016NZD01)
天津市青年后备人才支持计划()
研究生科研创新项目(2019)(2019XY010)
出版年
2024
NETL
NSTL
万方数据