Marie Chela B. Cenia, Mili-Ann M. Tamayao
Gold is one of the most significant metals in the world, with use in various sectors including the electronic, health, and fashion industries. The Philippines has the world’s third largest known Au deposits and is ranked 20th in global gold production. Of the country’s annual production, about 80% is from the small-scale gold mining (SSGM) sector. This work estimates the first location-specific life cycle energy use and CO2 emissions of SSGM establishments in the Philippines. Process-based LCA was used with a functional unit of 100 g Au and observed data from 2010 to 2011 for mining, comminution, recovery, and refining. Four gold production paths were observed in the provinces of Benguet and Camarines Norte, namely, amalgamation, cyanidation with carbon-in-leach (CIL), cyanidation with leaching with zinc, and a combination of amalgamation and cyanidation with CIL. It was estimated that 3–18 g of Au was extracted for every ton of ore within 57–159 man-hours from mining to refining. Energy use estimates ranged from 3501 to 67,325 MJ/100 g Au, while CO2 emission estimates ranged from 398 to 5340 kg CO2/100 g Au. The estimated life cycle emissions rate for SSGM in the Philippines is lower than available estimates of large-scale mining.
@article{3698f501-700d-4cb8-bdd0-b0df947c236e,
title={Life cycle energy use and CO2 emissions of small-scale gold mining and refining processes in the Philippines},
author={Marie Chela B. Cenia and Mili-Ann M. Tamayao},
year={2017},
language={en}
}TY - JOUR TI - Life cycle energy use and CO2 emissions of small-scale gold mining and refining processes in the Philippines AU - Marie Chela B. Cenia AU - Mili-Ann M. Tamayao PY - 2017 LA - en ER -
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