Biologically-induced precipitation of sphalerite–wurtzite nanoparticles by sulfate-reducing bacteria: Implications for acid mine drainage treatment

Several experiments were conducted to evaluate zinc-tolerance of sulfate-reducing bacteria (SRB) obtained from three environmental samples, two inocula from sulfide-mining districts and another inoculum from a wastewater treatment plant. The populations of SRB resisted zinc concentrations of 260mg/L...

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Bibliographic Details
Published in:The Science of the total environment 2012-04, Vol.423, p.176-184
Main Authors: Castillo, Julio, Pérez-López, Rafael, Caraballo, Manuel A., Nieto, José M., Martins, Mónica, Costa, M. Clara, Olías, Manuel, Cerón, Juan C., Tucoulou, Rémi
Format: Article
Language:English
Subjects:
Acid mine drainage
Applied sciences
Bacteria, Anaerobic - metabolism
Biodegradation, Environmental
Biological and medical sciences
Biological treatment of waters
Biotechnology
Chemical Precipitation
detection limit
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environment and pollution
Environmental Pollutants - chemistry
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Industrial Waste
Industrial wastewaters
inoculum
landscapes
limestone
microscopy
Mining
nanoparticles
Nanoparticles - chemistry
Natural water pollution
Oxidation-Reduction
Particle Size
Pollution
Pollution, environment geology
Rainwaters, run off water and others
sediments
soil water
streams
sulfate-reducing bacteria
Sulfate-reducing bacteria (SRB)
sulfides
Sulfides - chemistry
Treatment
Waste Management - methods
wastewater treatment
Wastewaters
Water treatment and pollution
zinc
Zinc - chemistry
Zinc Compounds - chemistry
zinc sulfate
Zinc tolerance
ZnS nanocrystals
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Summary:Several experiments were conducted to evaluate zinc-tolerance of sulfate-reducing bacteria (SRB) obtained from three environmental samples, two inocula from sulfide-mining districts and another inoculum from a wastewater treatment plant. The populations of SRB resisted zinc concentrations of 260mg/L for 42days in a sulfate-rich medium. During the experiments, sulfate was reduced to sulfide and concentrations in solution decreased. Zinc concentrations also decreased from 260mg/L to values below detection limit. Both decreases were consistent with the precipitation of newly-formed sphalerite and wurtzite, two polymorphs of ZnS, forming
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2012.02.013