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Title: Efficient adsorption of Cadmium (II) ON Zn/M3+ (M3+ = Al, Cr) AND Zn/M3+-[a-SiW12O40] layered double hydroxides
Authors: Luna Silaen, Neza Rahayu Palapa, Novie Juleanti, Normah, Risfidian Mohadi, Elfita, Aldes Lesbani
Journal: ARPN Journal of Engineering and Applied Sciences
Publisher: Khyber Medical College, Peshawar
Country: Pakistan
Year: 2020
Volume: 15
Issue: 18
Language: English
The successfully synthesis of Zn/Al, Zn/Cr layered double hydroxides (LDH) intercalated with Keggin ion [a-SiW12O40]4- were confirmed by XRD, BET, and FT-IR analyses and used as an adsorbent Cadmium (II). The adsorption process was investigated by studying pHpzc, the kinetics, and thermodynamic properties of the adsorption process. The results showed the interlayer of Zn/Al and Zn/Cr after intercalation were increased to 10.26 Å and 10.35 Å from 7.51 Å and 7.53 Å, respectively. BET analysis represents after intercalation surface area was increased five times bigger than pristine LDH. The pore classification is mesopore. pH point zero charge shows the materials has pH 6-8. LDH intercalated with Keggin ion [a-SiW12O40]4- has higher adsorption capacity than pristine. The reusability study show the effectiveness of adsorbent.
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