摘要
对比坡缕石、活性炭、膨润土、蛭石粉对Se(Ⅳ)的吸附能力。结果表明,常温下,蛭石粉的吸附能力最强。结合吸附热力学、BET比表面积和红外光谱分析,认为蛭石粉吸附Se(Ⅳ)的吸附反应机理可能为二级反应。同时,也对蛭石进行了酸处理和高温处理改性实验。数据显示,在一定酸度范围内,溶液酸度越低,越有利于蛭石吸附Se(Ⅳ);而高温改性处理,则会降低蛭石吸附性能。
Contrast the palygorskite, activated carbon, bentonite and vermiculite adsorption ability of Se(Ⅳ).The results showed that the adsorption capacity of vermiculite powder to 50 mg/L Se(Ⅳ) was the strongest at room temperature.Modifiing it in high temperature and strong acid, and the adsorption reaction mechanism of vermiculite adsorption Se(Ⅳ) was determined by combining adsorption thermodynamic curve, adsorption thermodynamic equation, BET specific surface area analysis and infrared spectrum.The lower the acidity of Se(Ⅳ) solution within a certain range, the more favorable the adsorption will be.In addition, the adsorption capacity of acid modified vermiculite to Se(Ⅳ) increased significantly under low concentration, while the high-temperature modification was not conducive to the adsorption of vermiculite to Se(Ⅳ).
作者
李佳媛
田欢
徐峰
姚凌阳
魏昌华
鲍征宇
LI Jia-yuan;TIAN Huan;XU Feng;YAO Ling-yang;WEI Chang-hua;BAO Zheng-yu(College of Materials and Chemistry,China University of Geosciences(Wuhan),Wuhan 430078,China;Ankang Se-Resources Hi-Tech Co.,Ltd.,Ankang 725000,China;Zhejiang Research Institute,China University of Geosciences(Wuhan),Hangzhou 311300,China)
出处
《应用化工》
CAS
CSCD
北大核心
2021年第12期3340-3345,共6页
Applied Chemical Industry
基金
中国地质调查局地质调查二级项目(DD20190475)
陕西省重点研发计划项目(2017TSCXL-NY-02-01)
中央高校基本科研业务费专项资金资助项目(G1323520058)
安康市科学技术研究发展计划——工业科技攻关项目(AK2020-FX01-9)。
关键词
硒
吸附材料
改性蛭石
吸附动力学
吸附热力学
selenium
adsorption materials
modified vermiculite
adsorption kinetics
adsorption thermodynamics
