材料工程2025，Vol.53Issue(4)：187-193,7.DOI:10.11868/j.issn.1001-4381.2024.000550
原位沉淀法制备氢氧化镁/硅藻土复合材料及其对甲基橙的吸附
Preparation of magnesium hydroxide/diatomite composites by in-situ precipitation method and adsorption of methyl orange
摘要
Abstract
In view of the environmental pollution caused by organic dye wastewater in the process of economic development,magnesium hydroxide/diatomite composites are prepared by the in-situ precipitation method,and their adsorption performance is studied with methyl orange as the target pollutant.The magnesium hydroxide/diatomite composites are characterized by XRD,SEM,FT-IR and BET.The adsorption effects of the dosage,initial pH value,and initial concentration of the target pollutant on methyl orange are explored.The results show that the adsorption effect is the best when the dosage of magnesium hydroxide/diatomite is 0.5 g,the pH value is 8,and the concentration of methyl orange is 8 mg/L,and the adsorption rate of the composite reaches 93.34％.Compared with modified diatomite,the adsorption rate increases by 41.34％.The adsorption kinetics model,isothermal adsorption model,and adsorption thermodynamic model are used to analyze the adsorption process.The results show that the adsorption process is spontaneous endothermic and entropy-increasing,which conforms to the Freundlich isothermal adsorption model and quasi-second-order kinetic model,with chemical adsorption as the main mechanism.The composite material shows good reusability in cyclic verification experiments.关键词
氢氧化镁/硅藻土复合材料/改性/吸附/甲基橙Key words
magnesium hydroxide/diatomite composites/modification/adsorption/methyl orange分类
化学工程引用本文复制引用
白晶,李刚,赵美,任海芳,贾莹光,吴浛,朱纪璇..原位沉淀法制备氢氧化镁/硅藻土复合材料及其对甲基橙的吸附[J].材料工程,2025,53(4):187-193,7.基金项目
辽宁省菱镁矿高值利用工程研究中心课题(LMNKY202308) （LMNKY202308）
辽宁省教育厅面上项目(JYTMS20230069) （JYTMS20230069）
2024年度产教融合(产业学院)项目(110201013) （产业学院）
辽宁省大学生创新创业项目(S202414435006) （S202414435006）
2023年营口理工学院校级一流本科课程(YL202311) （YL202311）
