CHARACTERIZATION OF MODIFIED BENTONITE USING ALUMINUM POLYCATION

https://doi.org/10.22146/ijc.21913

Hery Haerudin(1*), Nino Rinaldi(2), Adel Fisli(3)

(1) Pusat Penelitian Kimia - LIPI, Kawasan Puspiptek, Serpong, Tangerang, Banten
(2) Pusat Penelitian Kimia - LIPI, Kawasan Puspiptek, Serpong, Tangerang, Banten
(3) Puslitbang Iptek Bahan (P3IB)-BATAN, Kawasan Puspiptek, Serpong, Tangerang, Banten
(*) Corresponding Author

Abstract


The modification of bentonite by pillarization using aluminum polycation type Keggin [Al13O4(OH)24(H2O)12]7+ has been carried out, by exchange of cation from interlayer with aluminum polycation. The amount of aluminum polycation, which was used for the pillaring of bentonite was varied, i.e. 5 mmol/gram, 10 mmol/gram, and 20 mmol/gram of bentonite. After drying, the pillared bentonite was calcined at 400 oC for 6 hour with temperature rate of 5 oC/min. The cationic exchange capacity (CEC) of starting bentonite was 98.3 meq/100 gram. The concentration ratio of Al/Si increased from 0.27 to 0.34 for pillared bentonite and of Ca/Si was decreased from 0.06 to 0.006 for pillared bentonite. The basal space for pillared bentonit increased significantly from 7.30 Å to about 18 Å . The measured specific surface area (by BET) of pillared bentonite was also increased significantly from 46 m2/g to about 162 m2/g. It was concluded that bentonite has been pillared by aluminum polication successfully.


Keywords


aluminum polycation; bentonite

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DOI: https://doi.org/10.22146/ijc.21913

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Indonesian Journal of Chemistry (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

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