Studi Adsorpsi-Desorpsi Anion Fosfat Pada Bentonit Termodifikasi CTAB

Adsorption-Desorption Studies of Phosphate on CTAB Modified Bentonite

  • Syarifah Rabiatul Adawiah Chemistry Department, Faculty of Science and Technology, Alauddin State Islamic University of Makassar, Kampus 2 Jl. H. M. Yasin Limpo No.36 Samata, Kab. Gowa, Sulawesi Selatan
  • Sutarno Sutarno Chemistry Department, Faculty of Mathematics and Natural Sciences, Gadjah Mada University, Bulaksumur Yogyakarta 55281
  • Suyanta Suyanta Chemistry Department, Faculty of Mathematics and Natural Sciences, Gadjah Mada University, Bulaksumur Yogyakarta 55281
DOI: https://doi.org/10.30598/ijcr.2020.8-sra
Keywords: CTA-bentonite, adsorption, desorption, phosphate, SRF.

Abstract

Adsorption-desorption studies of phosphate on CTAB modified bentonite have been investigated. The results were characterized by FT-IR spectrometer to determine the functional groups in bentonite and X-ray diffractometer to determine the type of minerals in the bentonite. Adsorption was conducted by shaking 10 mg adsorbent in 5 mL adsorbate solution at the optimum condition of pH, contact time, and concentration. Furthermore, desorption studies were conducted on 5 mL medium of both water and citric acid 0.33 M and using 6.5 mg of adsorbent which has adsorbed phosphate. The results showed that the bentonite has been successfully modified with CTAB. The adsorption capacity of phosphate is 0.028 mmol g-1. Desorption studies showed that the solubility percentage of phosphate anion in citric acid was 0.33 M (73.33%) greater than in water (57.81%) which is a requirement for the use of slow-release fertilizers (SRF).

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Published
2020-09-30
How to Cite
(1)
Adawiah, S.; Sutarno, S.; Suyanta, S. Studi Adsorpsi-Desorpsi Anion Fosfat Pada Bentonit Termodifikasi CTAB. Indo. J. Chem. Res. 2020, 8, 125-136.
Issue
Vol 8 No 2 (2020): Edition for September
Section
Research articles

Copyright (c) 2020 Syarifah Rabiatul Adawiah, Sutarno Sutarno, Suyanta Suyanta

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