Study on Adsorption Mechanism of Acid-Modified Bentonite

1st International Workshop on Materials Science and Mechanical Engineering

材料科学;机械制造

Peng, L.G.^1 ; Zhu, J.H.^1 ; Han, J.^1 ; Wang, X.X.^1 ; Zhao, M.^1 ; Cheng, H.Q.^1 ; Zhang, X.^1

School of Material Science and Engineering, Xi'An University of Science and Technology, Xi'an

710054, China^1

关键词: Adsorption mechanism;    Adsorption performance;    Chemical compositions;    Exchange reaction;    Langmuir monolayers;    Layer structures;    Modified bentonites;    Pseudo-second-order kinetic models;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/281/1/012009/pdf
DOI  :  10.1088/1757-899X/281/1/012009

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The acid-modified bentonite was prepared by sulfuric acid acidification, we compared it in chemical composition, layer structure and adsorption performance before and after the adsorption of Cu2+ by joint analysis of FT-IR, XRD, and ICP. The results indicated that: XRD showed that Cu2+ went into the bentonite layer, the analysis of ICP showed: Cu2+ exchange reaction didn't take place, only coordination reaction occurred, i.e. acid-modified bentonite adsorbs cooper irons mainly in a way of cooperation reaction; the adsorption of acid-modified bentonite conforms to the Langmuir monolayer model and the pseudo-second-order kinetic model.