Adsorption of Phosphate Ion in Water with Lithium-Intercalated Gibbsite  

Oleh:

Sihombing, Riwandi ; Krisnandi, Yuni Krisyuningsih ; Widya, Rahma ; Luthfiyah, Siti Zahrotul ; Yunarti, Rika Tri

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Makara Seri Sains vol. 19 no. 4 (Dec. 2015), page 131-136.
Topik: adsorption; gibbsite; intercalation; lithium; phosphate
Fulltext: 5166-9764_her.pdf (337.61KB)

Isi artikel

In order to enhance adsorption capacity of gibbsite (Al(OH) 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 [LiAl 3 2 (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 H 2 PO 4 - /HPO 4 - 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.

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