花生壳生物炭负载钙钛矿材料对亚甲基蓝吸附性能研究
Study on the Adsorption Performance of Peanut Shell Biochar Loaded with Perovskite Material for Methylene Blue
孟祥雨1
作者信息
- 1. 西南交通大学,四川 成都 610031
- 折叠
摘要
本文通过溶胶凝胶法在超声辅助下成功合成了复合材料BC@LF.通过SEM、XRD以及BET表征了材料的表面形貌、成分、晶型以及吸附参数.测试了BC@LF对亚甲基蓝(MB)的吸附能力,实验结果表明BC@LF可以快速吸附MB,并且其吸附能力与溶液pH以及温度呈正相关性.同时还测定了BC@LF的PZC结果表明pH低于6.9时BC@LF表面电位为正,pH高于6.9时BC@LF表面电位为负.根据实验结果分析了BC@LF在吸附MB过程中的吸附动力学和热力学,其中吸附动力学符合Elovich模型为化学吸附行为,吸附热力学符合Freundlich模型表明BC@LF为非均匀吸附.此外,选取了五种有机污染物对BC@LF进行吸附测试,得到了不错的吸附效果证明了BC@LF具有对有机污染物吸附的普适性.
Abstract
In this study,a composite material BC@LF was successfully synthesized via sol-gel method assisted by ultrasound.The surface morphology,composition,crystalline phase,and adsorption parameters of the material were characterized using SEM,XRD,and BET.The adsorption capacity of BC@LF for Methylene Blue(MB)was tested,and the experimental results showed that BC@LF can rapidly adsorb MB,with its adsorption capacity positively correlated with solution pH and temperature.The Point of Zero Charge(PZC)of BC@LF was also determined,indicating a positive surface potential when the pH is below 6.9,and a negative surface potential when the pH is above 6.9.The adsorption kinetics and thermodynamics of BC@LF in the MB adsorption process were analyzed based on experimental results.The adsorption kinetics followed the Elovich model,suggesting a chemical adsorption behavior,while the adsorption thermodynamics conformed to the Freundlich model,indicating non-uniform adsorption of BC@LF.Furthermore,five types of organic pollutants were selected for adsorption tests on BC@LF,demonstrating its universality in adsorbing organic pollutants.
关键词
生物炭/LaFeO3/复合材料/亚甲基蓝/吸附作用Key words
biochar/LaFeO3/composite material/methylene blue/adsorption引用本文复制引用
基金项目
四川省科技厅应用基础研究项目(2021YJ0385)
出版年
2024
NETL
NSTL
万方数据