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Acid mine drainage attenuation by inhibition of pyrite bioleaching using limestone and olive pomace
- Source :
- Chemistry and Ecology. 28:293-303
- Publication Year :
- 2012
- Publisher :
- Informa UK Limited, 2012.
-
Abstract
- The control and inhibition of pyrite bioleaching involved in the generation of acid mine drainage was studied. Inhibition of pyrite bioleaching was performed by varying the pyrite concentration in the medium (substrate inhibition) and/or by addition of limestone (inhibition by pH increase) and olive pomace (inhibition by organic compounds). Inhibition tests of pyrite bioleaching were performed according to a full factorial design with three factors (pyrite, limestone and olive pomace) taken at two levels. Preliminary pyrite bioleaching tests showed the ability of the available inoculum to oxidise the mineral. Subsequently, experimental data for total soluble iron denoted strong inhibition under all the different operating conditions of the factorial design, except when larger pyrite concentrations were used. In particular, inhibition by limestone was due to the increase in pH which negatively affects microorganisms, while inhibition by olive pomace may be related to the antioxidant properties of polypheno...
- Subjects :
- Antioxidant
Microorganism
medicine.medical_treatment
engineering.material
acid mine drainage
bioleaching
iron oxidising bacteria
limestone
olive pomace
pyrite
Mining engineering
Bioleaching
medicine
Ecology, Evolution, Behavior and Systematics
General Environmental Science
Ecology
Pomace
Substrate (chemistry)
Factorial experiment
Acid mine drainage
Environmental chemistry
engineering
General Earth and Planetary Sciences
Pyrite
Geology
Subjects
Details
- ISSN :
- 10290370 and 02757540
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Chemistry and Ecology
- Accession number :
- edsair.doi.dedup.....72ed3e4977e27a0fc547c0fb38f823bf