#7429. Arsenic Trioxide Leaching and Scorodite Crystallization in Methanesulfonic Acid

October 2026publication date
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Journal’s subject area:
Economic Geology;
Mechanical Engineering;
Geotechnical Engineering and Engineering Geology;
Chemistry (all);
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Abstract:
Arsenic, one of the most toxic elements, is a byproduct generated from metallurgical processes of arsenic-containing ores. Arsenic can be formed into an arsenic trioxide as a byproduct during the decopperization in electro-refining process when processing high arsenic-bearing copper minerals. However, arsenic trioxide has a very high arsenic mobility, so it requires to be re-dissolved and immobilized into scorodite (FeAsO4?2H2O). In this study, methanesulfonic acid (MSA) was tested for both arsenic trioxide leaching and scorodite precipitation.
Keywords:
arsenic ferrihydrite; arsenic precipitation; arsenic trioxide leaching; decopperization; Methanesulfonic acid; scorodite

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