Santi, Laksmita Prima and Mulyanto, Djoko and Goenadi, Didiek Hadjar (2017) Double Acid-Base Extraction of Silicic Acid from Quartz Sand. Journal of Minerals and Materials Characterization and Engineering. pp. 362-373. ISSN 2327-4077 / online: 2327-4085
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Abstract
Silica is becoming more attractive as plant nutrient for non-graminae crops
particularly in relation with drought-stress tolerant. Many efforts have been
conducted to obtain an efficient technique to produce silica fertilizer worldwide,
but the results are varying considerably due to various factors including
raw material and extraction technique. This study was carried out to develop
an efficient extraction technique for ortho-silicic acid (OSA-H4SiO4) from a
Bangka-Belitung quartz sand by employing acid-base dissolution method. A
325-mesh size quartz sand was boiled in HCl solution at various concentrations.
The optimum concentration was then used in the following experiment
at several different volumes of solution. The sand obtained from optimum
concentration and volume of HCl solution was then reacted with different
amounts of NaOH (s), and heated until a wet mixture was obtained. As a reference
the best extraction conditions were applied to a natural zeolite sample.
All OSA analyses were done in triplicates with spectrophotometric method.
Supporting evidences were collected from x-ray diffraction and scanning-
electron-microscopy analyses of the treated samples. The yield of quartz
sand-originated OSA was 183 g∙kg−1 and significantly increased linearly with
increasing weight of NaOH (R2 = 0.99**), whereas that from zeolite was only
104.2 g∙kg−1 at 80 g NaOH. XRD and SEM data confirmed the evidences that
the acid-base extraction disrupted the quartz mineral structure and as a consequence
releasing more water soluble OSA.
| Item Type: | Article |
|---|---|
| Subjek: | Q Science > QE Geology |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | S.kom DINA SYAHFITRI |
| Date Deposited: | 28 Jan 2019 01:53 |
| Last Modified: | 28 Jan 2019 02:18 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/18203 |
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