Determination of the Carbon Dioxide Sequestration Potential of a Nickel Mine Mixed Dump through Leaching Tests

Bernard Jomari B. Razote, Mark Kenneth M. Maranan, Ramon Christian P. Eusebio, Richard D. Alorro, Arnel B. Beltran and Aileen H. Orbecido
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Bernard Jomari B. Razote: Chemical Engineering Department, Gokongwei College of Engineering, De La Salle University, Malate, Manila 1004, Philippines
Mark Kenneth M. Maranan: Chemical Engineering Department, College of Engineering and Agro-Industrial Technology, University of the Philippines-Los Baños, Laguna 4031, Philippines
Ramon Christian P. Eusebio: Chemical Engineering Department, College of Engineering and Agro-Industrial Technology, University of the Philippines-Los Baños, Laguna 4031, Philippines
Richard D. Alorro: Western Australian School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Kalgoorlie, WA 6430, Australia
Arnel B. Beltran: Chemical Engineering Department, Gokongwei College of Engineering, De La Salle University, Malate, Manila 1004, Philippines
Aileen H. Orbecido: Chemical Engineering Department, Gokongwei College of Engineering, De La Salle University, Malate, Manila 1004, Philippines

Energies, 2019, vol. 12, issue 15, 1-19

Abstract: Carbon dioxide sequestration via mineralization is one of the methods that has the capability to efficiently store carbon dioxide in a stable form. A mixed dump sample collected from a nickel laterite mine in Southern Philippines was tested for its carbon dioxide sequestration potential through HCl leaching tests, employing the Face-Centered Cube (FCC) experimental design for Response Surface Methodology (RSM). Mineralogical analysis performed through X-ray diffraction (XRD) analysis suggests the presence of three minerals, namely goethite, khademite and lizardite; additional X-ray fluorescence (XRF) and inductively-coupled plasma optical emission spectroscopy (ICP-OES) results, however, established goethite as the main component due to the dominance of iron in the sample. Morphological analyses performed through a scanning electron microscope (SEM) and the Brunauer–Emmett–Teller (BET) method suggest high accessible surface area despite considerable variability in sample composition. Leaching tests further confirmed the high reactivity of the mixed dump as high extraction rates were obtained for iron, with the maximum iron extraction efficiency of 95.37% reported at 100 °C, 2.5 M, and 2.5 h. The carbon dioxide sequestration potential of the mixed dump was reported as the amount of CO 2 that can be sequestered per amount of sample, which was calculated to be 327.2 mg CO 2/ g sample using the maximum iron extraction obtained experimentally.

Keywords: indirect carbon sequestration; nickel mine waste; leaching test; iron extraction efficiency; face-centered cube design; iron carbonation; carbon dioxide sequestration potential (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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