Bioleaching of Enargite/Pyrite-rich “Dirty” Concentrate and Arsenic Immobilization

Autor:	Hirajima, Naoko Okibe, Kaito Hayashi, Keishi Oyama, Kazuhiko Shimada, Yuji Aoki, Takahiro Suwa, Tsuyoshi
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	enargite pyrite concentrate bioleaching activated carbon arsenic immobilization solution redox potential (Eh) moderately thermophilic acidophiles
Zdroj:	Minerals; Volume 12; Issue 4; Pages: 449
ISSN:	2075-163X
DOI:	10.3390/min12040449
Popis:	Bioleaching of arsenic (As)-rich, so-called “dirty” concentrates can produce additional Cu value from the flotation waste while simultaneously releasing toxic As. This study bioleached three such concentrates of varying pyrite/enargite ratios ([Py]/[Ena] = 0.7, 1.3 and 2.4) at a pulp density of 20%. The dissolution behavior of Cu and As in relation to the solution redox potential (Eh) was studied with and without activated carbon (AC) as a potential Eh-controlling catalyst. At this high pulp density, Eh was naturally suppressed, without a need for AC dosing, to
Databáze:	OpenAIRE
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