A temperature-mediated precipitation of struvite-family crystals in wastewater

Sutiyono, S. and Edahwati, L. and Muryanto, S. and Jamari, J. and Bayuseno, A.P. (2016) A temperature-mediated precipitation of struvite-family crystals in wastewater. International Journal of ChemTech Research, 9 (8). pp. 486-494. ISSN 0974-4290

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Official URL: http://sphinxsai.com/2016/ch_vol9_no8/abstracts/A(...


The paper presents results of the investigation into the temperature mediated mineralogical formation of struvite family crystals in a synthetic wastewater. The scale-forming solution was set-up by mixing solutions of MgCl2 and NH4H2PO4 with Mg+2, NH4 + and PO4 -3 in a molar ratio (MAP) of 1:1:1. The temperature was altered: 30, 35 and 40 OC. The initial pH of the solution was set up in 9.0. SEM (equipped with EDX) analysis revealed that the crystals have a needle like-shaped morphology, and contained Mg, K, P, and O as the main composition. The Rietveld analysis of the XRPD pattern confirmed that the major phase of struvite, and struvite-(K) formed in the precipitating solids. Apparently, bobierrite and newberyte were other phosphate minerals formed at the temperature of 35 OC. Analysis of this experimental data suggested that the temperature-mediated crystallization process yielded a potential optimization of struvite precipitation.

Item Type:Article
Uncontrolled Keywords:Bobierrite, Newberyte, Struvite, Temperature, XRPD Rietveld method.
Subjects:T Technology > TN Mining engineering. Metallurgy
Divisions:Faculty of Engineering > Department of Mechanical Engineering
Faculty of Engineering > Department of Mechanical Engineering
ID Code:71663
Deposited By:Mr. Sugeng Priyanto
Deposited On:15 Apr 2019 21:33
Last Modified:14 May 2019 19:34

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