Study on Adsorption Mechanism of Acid-Modified Bentonite

[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.

[发布机构] School of Material Science and Engineering, Xi'An University of Science and Technology, Xi'an; 710054, China^1

[效力级别] 机械制造 [学科分类] 材料科学（综合）

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