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

作　　者：孟祥雨 Meng Xiangyu(Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学,四川成都610031

出　　处：《广东化工》2024年第4期27-30,57,共5页Guangdong Chemical Industry

基　　金：四川省科技厅应用基础研究项目(2021YJ0385)。

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,p H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。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 [e-mail],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 LaFeO_(3) 复合材料 亚甲基蓝 吸附作用 

分 类 号：X52[环境科学与工程—环境工程]