Adsorption of Phosphate Ion in Water with Lithium-Intercalated Gibbsite

Authors

Riwandi Sihombing, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia
Yuni Krisyuningsih Krisnandi, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia
Rahma Widya, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia
Siti Zahrotul Luthfiyah, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia
Rika Tri Yunarti, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia Department of Clean Energy and Chemical Engineering, Korea University of Science and Technology, Daejeon 305-350, Republic of KoreaFollow

Abstract

In order to enhance adsorption capacity of gibbsite (Al(OH)3 as an adsorbent for the adsorption of phosphate in water, gibbsite was modified through lithium-intercalation. The purification method of Tributh and Lagaly was applied prior to intercalation. The Li-Intercalation was prepared by the dispersion of gibbsite into LiCl solution for 24 hours. This intercalation formed an cationic clay with the structure of [LiAl2(OH)6]+ and exchangeable Cl- anions in the gibbsite interlayer. A phosphate adsorption test using Lithium-intercalated gibbsite (LIG) resulted in optimum adsorption occurring at pH 4.5 with an adsorption capacity of 11.198 mg phosphate/g LIG which is equivalent with 1.04 wt% LIG. The adsorption capacity decreased with decreasing amounts of H2PO4-/HPO4- species in the solution. This study showed that LIG has potential as an adsorbent for phosphate in an aqueous solution with pH 4.5–9.5.

Recommended Citation

Sihombing, Riwandi; Krisnandi, Yuni Krisyuningsih; Widya, Rahma; Luthfiyah, Siti Zahrotul; and Yunarti, Rika Tri (2015) "Adsorption of Phosphate Ion in Water with Lithium-Intercalated Gibbsite," Makara Journal of Science: Vol. 19: Iss. 4, Article 1.
DOI: 10.7454/mss.v19i4.5166
Available at: https://scholarhub.ui.ac.id/science/vol19/iss4/1