OPTIMASI ADSORPSI Cr(VI) PADA SILIKA GEL DARI ABU SEKAM PADI TERMODIFIKASI DIFENILKARBAZIDA (Si-DPZida)

Henny Puspa Dewi Giri; I Wayan Sudiarta; Ida Ayu Raka Astiti Asih

doi:10.24843/JCHEM.2014.v08.i02.p09

OPTIMASI ADSORPSI Cr(VI) PADA SILIKA GEL DARI ABU SEKAM PADI TERMODIFIKASI DIFENILKARBAZIDA (Si-DPZida)

Henny Puspa Dewi Giri
I Wayan Sudiarta
Ida Ayu Raka Astiti Asih

DOI: https://doi.org/10.24843/JCHEM.2014.v08.i02.p09

Abstract

Adsorption of chromium (VI) on silica gel modified by diphenilcarbazide (Si-DPZida) have been studied. Parameters analyzed were surface acidity by acid-base titration method, specific surface area by absorption of methylene blue method, optimum conditions of adsorption (pH, contact time), and isotherm adsorption.

The results showed that Si-DPZida adsorbent has surface acidity (K_al) of 1,5996 mmol/g with the number of active sites of 9,6328 x 10²⁰ atom/g with specific surface area of 4.4538 m²/g. The optimum adsorption process of chromium (VI) by both Si-DPZida occurred at pH 5 and 15 minutes of contact time. The isotherm adsorptions on both adsorbents tend to follow Freundlich adsorption pattern.

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Author Biographies

Henny Puspa Dewi Giri

Jurusan Kimia, FMIPA Universitas Udayana, Bukit Jimbaran

I Wayan Sudiarta

Jurusan Kimia, FMIPA Universitas Udayana, Bukit Jimbaran

Ida Ayu Raka Astiti Asih

Jurusan Kimia, FMIPA Universitas Udayana, Bukit Jimbaran

Published

2014-07-01

How to Cite

PUSPA DEWI GIRI, Henny; SUDIARTA, I Wayan; RAKA ASTITI ASIH, Ida Ayu. OPTIMASI ADSORPSI Cr(VI) PADA SILIKA GEL DARI ABU SEKAM PADI TERMODIFIKASI DIFENILKARBAZIDA (Si-DPZida). Jurnal Kimia (Journal of Chemistry), [S.l.], july 2014. ISSN 2599-2740. Available at: <https://ojs.unud.ac.id/index.php/jchem/article/view/11758>. Date accessed: 21 nov. 2024. doi: https://doi.org/10.24843/JCHEM.2014.v08.i02.p09.

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