Mathematics – Logic
Scientific paper
Feb 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012gecoa..78...65c&link_type=abstract
Geochimica et Cosmochimica Acta, Volume 78, p. 65-76.
Mathematics
Logic
Scientific paper
Biological reduction of iron-sulfate minerals, such as jarosite, has the potential to contribute to the natural attenuation of acid mine drainage (AMD) sites. Previous studies of AMD attenuation at Davis Mine, an abandoned pyrite mine in Rowe Massachusetts, provided evidence of iron and sulfate reduction by indigenous bacteria. Jarosite is a large component of the sediment at Davis Mine and may play a role in AMD attenuation. In this study, microcosms were constructed with groundwater and sediment from Davis Mine and amended with glycerol, nitrogen and phosphorus (GNP) and naturally formed natrojarosite. Over time, higher total iron, sulfate, pH and sodium concentrations and lower oxidation-reduction potentials were observed in microcosms amended with GNP and jarosite, compared with unamended microcosms and killed controls. Geochemical modeling predicted jarosite precipitation under microcosm conditions, suggesting that abiotic processes were unlikely contributors to jarosite dissolution. SEM imaging at the jarosite surface showed microbial attachment. Microbial community composition analysis revealed a shift to higher populations of Clostridia, which are known to reduce both iron and sulfate. The results show that jarosite may be utilized as an electron acceptor by iron and/or sulfate reducing bacteria at Davis Mine and its presence may aid in the attenuation of AMD.
Becerra Caryl Ann
Coggon Matthew
Ergas Sarina J.
Miller Karen
Nüsslein Klaus
No associations
LandOfFree
Bioavailability of jarosite for stimulating acid mine drainage attenuation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Bioavailability of jarosite for stimulating acid mine drainage attenuation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bioavailability of jarosite for stimulating acid mine drainage attenuation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1838588