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标题：Modification Of Zn-Cr Layered Double Hydroxide With Keggin Ion [α-SiW12O40] 4− as Cr(VI) Adsorbent
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作者：Melantina Oktriyanti ; Neza Rahayu Palapa ; Risfidian Mohadi 等
期刊名称：IJEMS (Indonesian Journal of Environmental Management and Sustainability)
印刷版ISSN：2598-6260
电子版ISSN：2598-6279
出版年度：2019
卷号：3
期号：3
页码：93-99
DOI：10.26554/ijems.2019.3.3.93-99
语种：English
出版社：ARTS Publishing Corp.
摘要：In this study,the synthesis of layered double hydroxide of Zn-Cr and Zn-Cr intercalated with Keggin ion [SiW12O40] 4− have been conducted.The synthesized material was characterized using XRD,BET,and FTIR analyses.Zn-Cr layered double hydroxide and the intercalation were used as Cr(VI) ion adsorbent.Factors that influence the adsorption process,such as kinetic and thermodynamic parameters were studied.Based on XRD characterization,the interlayer distance Zn-Cr of layered double hydroxide was 7.53 ˚A increase to 10.26 ˚A on Zn-Cr layered double hydroxide intercalated with Keggin ion [SiW12O40] 4−.BET analysis showed that the surface area of both materials increased from 31.638 m2/g to 128.871 m2/g.The result of pH Point Zero Charge measurement for the Zn-Cr layered double hydroxide material was ten while the Zn-Cr intercalated with Keggin ion [SiW12O40] 4− material was 8.Based on the kinetics model,adsorption of Cr(VI) ion follows pseudo-second-order model with a linear regression coefficient close to one.Furthermore,the Zn-Cr intercalated with Keggin ion [SiW12O40] 4− shows the higher adsorption capacity for the Cr(VI) ion than the Zn-Cr layered double hydroxide as a control.
关键词：adsorption;Cr(VI);Keggin ion;layered double hydroxide;Zn-Cr