TY - GEN
T1 - Stabilization of Arsenic Byproduct from Decopperization Process to Scorodite Using Methanesulfonic Acid
AU - Ahn, Junmo
AU - Wu, Jiajia
AU - Ahn, Jaewoo
AU - Lee, Jaeheon
N1 - Publisher Copyright:
Copyright © 2023 Society for Mining, Metallurgy & Exploration. All Rights Reserved.
PY - 2023
Y1 - 2023
N2 - Arsenic (As) is a toxic byproduct from copper smelting. Arsenic immobilization is critical to prevent detrimental impacts on the environment. Arsenic compounds from decopperization, such as arsenic trioxide, requires to be dissolved and stabilized into scorodite (FeAsO4 2H2O). However, the conventional lixiviant, sulfuric acid (H2SO4) limits As leaching, so methanesulfonic acid (MSA), was investigated as an alternative lixiviant for arsenic leaching and scorodite crystallization. Results of arsenic trioxide leaching show that arsenic extraction with MSA was above 90% at 80oC within 4 hours. In addition, arsenic removal as scorodite was 98% at 80oC. Overall, MSA was proven to be a feasible-alternative to the standard sulfuric acid leaching of arsenic trioxide with the potential to immobilize arsenic by precipitating it to scorodite in the MSA medium.
AB - Arsenic (As) is a toxic byproduct from copper smelting. Arsenic immobilization is critical to prevent detrimental impacts on the environment. Arsenic compounds from decopperization, such as arsenic trioxide, requires to be dissolved and stabilized into scorodite (FeAsO4 2H2O). However, the conventional lixiviant, sulfuric acid (H2SO4) limits As leaching, so methanesulfonic acid (MSA), was investigated as an alternative lixiviant for arsenic leaching and scorodite crystallization. Results of arsenic trioxide leaching show that arsenic extraction with MSA was above 90% at 80oC within 4 hours. In addition, arsenic removal as scorodite was 98% at 80oC. Overall, MSA was proven to be a feasible-alternative to the standard sulfuric acid leaching of arsenic trioxide with the potential to immobilize arsenic by precipitating it to scorodite in the MSA medium.
KW - Alternative lixiviant
KW - Arsenic immobilization
KW - Crystallization
KW - Methanesulfonic acid
KW - MSA
KW - Scorodite
UR - https://www.scopus.com/pages/publications/85191261259
M3 - Conference paper
AN - SCOPUS:85191261259
T3 - 9th International Symposium on Hydrometallurgy 2023
BT - 9th International Symposium on Hydrometallurgy 2023
PB - Society for Mining, Metallurgy and Exploration
T2 - 9th International Symposium on Hydrometallurgy 2023
Y2 - 27 August 2023 through 30 August 2023
ER -