Several approaches to enhance the bioleaching of enargite

Keiko Sasaki, K. Takatsugi, T. Hirajima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Some approaches were investigated to enhance the recovery of Cu from enargite by bioleaching with Acidithiobacillus ferrooxidans using the galvanic interaction with pyrite and activated carbon, and with thermophilic bacteria, Acidianus brierleyi. Addition of pyrite initially enhanced Cu leaching by the Galvanic effect, but after that the formation of secondary minerals passivated the surface of enargite in inoculated batches. Activated carbon improved Cu recovery from enargite much better than pyrite, when it is contacted with enargite. Recovery of Cu from enargite has been recorded to at largest 2.4 per cent within 30 days in the presence of activated carbon when mesophilic bacteria were inoculated at 25°C. The recovery of Cu from enargite was drastical ly enhanced by inoculation of thermophilic bacteria, Acidianus brierleyi, up to 60 per cent within 40 days at 70°C and still not leveled off after 40 days unless the formation of Fe(III) precipitates occurred. After 40 days dissolved molar ratio of Cu/As is around 5.2, suggesting that metal-defi cient sulfi des and/or ferric arsenate might be formed on the surface of enargite.

Original languageEnglish
Title of host publicationXXV International Mineral Processing Congress 2010, IMPC 2010
Pages487-497
Number of pages11
Volume1
Publication statusPublished - 2010
Event25th International Mineral Processing Congress 2010, IMPC 2010 - Brisbane, QLD, Australia
Duration: Sep 6 2010Sep 10 2010

Other

Other25th International Mineral Processing Congress 2010, IMPC 2010
CountryAustralia
CityBrisbane, QLD
Period9/6/109/10/10

Fingerprint

Bioleaching
Pyrites
Activated carbon
activated carbon
thermophilic bacterium
Recovery
pyrite
Bacteria
secondary mineral
arsenate
Leaching
inoculation
Precipitates
Minerals
leaching
bacterium
metal
Metals

All Science Journal Classification (ASJC) codes

  • Earth-Surface Processes
  • Geology
  • Electrical and Electronic Engineering
  • Mechanical Engineering

Cite this

Sasaki, K., Takatsugi, K., & Hirajima, T. (2010). Several approaches to enhance the bioleaching of enargite. In XXV International Mineral Processing Congress 2010, IMPC 2010 (Vol. 1, pp. 487-497)

Several approaches to enhance the bioleaching of enargite. / Sasaki, Keiko; Takatsugi, K.; Hirajima, T.

XXV International Mineral Processing Congress 2010, IMPC 2010. Vol. 1 2010. p. 487-497.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sasaki, K, Takatsugi, K & Hirajima, T 2010, Several approaches to enhance the bioleaching of enargite. in XXV International Mineral Processing Congress 2010, IMPC 2010. vol. 1, pp. 487-497, 25th International Mineral Processing Congress 2010, IMPC 2010, Brisbane, QLD, Australia, 9/6/10.
Sasaki K, Takatsugi K, Hirajima T. Several approaches to enhance the bioleaching of enargite. In XXV International Mineral Processing Congress 2010, IMPC 2010. Vol. 1. 2010. p. 487-497
Sasaki, Keiko ; Takatsugi, K. ; Hirajima, T. / Several approaches to enhance the bioleaching of enargite. XXV International Mineral Processing Congress 2010, IMPC 2010. Vol. 1 2010. pp. 487-497
@inproceedings{4448ef09b2f947dfb281f48e5ec5860f,
title = "Several approaches to enhance the bioleaching of enargite",
abstract = "Some approaches were investigated to enhance the recovery of Cu from enargite by bioleaching with Acidithiobacillus ferrooxidans using the galvanic interaction with pyrite and activated carbon, and with thermophilic bacteria, Acidianus brierleyi. Addition of pyrite initially enhanced Cu leaching by the Galvanic effect, but after that the formation of secondary minerals passivated the surface of enargite in inoculated batches. Activated carbon improved Cu recovery from enargite much better than pyrite, when it is contacted with enargite. Recovery of Cu from enargite has been recorded to at largest 2.4 per cent within 30 days in the presence of activated carbon when mesophilic bacteria were inoculated at 25°C. The recovery of Cu from enargite was drastical ly enhanced by inoculation of thermophilic bacteria, Acidianus brierleyi, up to 60 per cent within 40 days at 70°C and still not leveled off after 40 days unless the formation of Fe(III) precipitates occurred. After 40 days dissolved molar ratio of Cu/As is around 5.2, suggesting that metal-defi cient sulfi des and/or ferric arsenate might be formed on the surface of enargite.",
author = "Keiko Sasaki and K. Takatsugi and T. Hirajima",
year = "2010",
language = "English",
isbn = "9781617820519",
volume = "1",
pages = "487--497",
booktitle = "XXV International Mineral Processing Congress 2010, IMPC 2010",

}

TY - GEN

T1 - Several approaches to enhance the bioleaching of enargite

AU - Sasaki, Keiko

AU - Takatsugi, K.

AU - Hirajima, T.

PY - 2010

Y1 - 2010

N2 - Some approaches were investigated to enhance the recovery of Cu from enargite by bioleaching with Acidithiobacillus ferrooxidans using the galvanic interaction with pyrite and activated carbon, and with thermophilic bacteria, Acidianus brierleyi. Addition of pyrite initially enhanced Cu leaching by the Galvanic effect, but after that the formation of secondary minerals passivated the surface of enargite in inoculated batches. Activated carbon improved Cu recovery from enargite much better than pyrite, when it is contacted with enargite. Recovery of Cu from enargite has been recorded to at largest 2.4 per cent within 30 days in the presence of activated carbon when mesophilic bacteria were inoculated at 25°C. The recovery of Cu from enargite was drastical ly enhanced by inoculation of thermophilic bacteria, Acidianus brierleyi, up to 60 per cent within 40 days at 70°C and still not leveled off after 40 days unless the formation of Fe(III) precipitates occurred. After 40 days dissolved molar ratio of Cu/As is around 5.2, suggesting that metal-defi cient sulfi des and/or ferric arsenate might be formed on the surface of enargite.

AB - Some approaches were investigated to enhance the recovery of Cu from enargite by bioleaching with Acidithiobacillus ferrooxidans using the galvanic interaction with pyrite and activated carbon, and with thermophilic bacteria, Acidianus brierleyi. Addition of pyrite initially enhanced Cu leaching by the Galvanic effect, but after that the formation of secondary minerals passivated the surface of enargite in inoculated batches. Activated carbon improved Cu recovery from enargite much better than pyrite, when it is contacted with enargite. Recovery of Cu from enargite has been recorded to at largest 2.4 per cent within 30 days in the presence of activated carbon when mesophilic bacteria were inoculated at 25°C. The recovery of Cu from enargite was drastical ly enhanced by inoculation of thermophilic bacteria, Acidianus brierleyi, up to 60 per cent within 40 days at 70°C and still not leveled off after 40 days unless the formation of Fe(III) precipitates occurred. After 40 days dissolved molar ratio of Cu/As is around 5.2, suggesting that metal-defi cient sulfi des and/or ferric arsenate might be formed on the surface of enargite.

UR - http://www.scopus.com/inward/record.url?scp=84873608024&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84873608024&partnerID=8YFLogxK

M3 - Conference contribution

SN - 9781617820519

VL - 1

SP - 487

EP - 497

BT - XXV International Mineral Processing Congress 2010, IMPC 2010

ER -