Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/37613

TítuloSulfur reduction in acid rock drainage environments
Autor(es)Florentino, Anna P.
Weijma, Jan
Stams, Alfons Johannes Maria
Sánchez-Andrea, Irene
EditoraAmerican Chemical Society
RevistaEnvironmental Science and Technology
CitaçãoFlorentino, Anna P.; Weijma, Jan; Stams, A. J. M.; Sánchez-Andrea, Irene, Sulfur reduction in acid rock drainage environments. Environmental Science and Technology, 49(19), 11746-11755, 2015
Resumo(s)Microbiological suitability of acidophilic sulfur reduction for metal recovery was explored by enriching sulfur reducers from acidic sediments at low pH (from 2 to 5) with hydrogen, glycerol, methanol and acetate as electron donors at 30 °C. The highest levels of sulfide in the enrichments were detected at pH 3 with hydrogen and pH 4 with acetate. Cloning and sequencing of the 16S rRNA gene showed dominance of the deltaproteobacterial sulfur-reducing genus Desulfurella in all the enrichments and subsequently an acidophilic strain (TR1) was isolated. Strain TR1 grew at a broad range of pH (37) and temperature (2050 °C) and showed good metal tolerance (Pb2+, Zn2+, Cu2+, Ni2+), especially for Ni2+ and Pb2+, with maximal tolerated concentrations of 0.09 and 0.03 mM, respectively. Different sources of sulfur were tested in the enrichments, from which biosulfur showed fastest growth (doubling time of 1.9 days), followed by colloidal, chemical and sublimated sulfur (doubling times of 2.2, 2.5, and 3.6 days, respectively). Strain TR1?s physiological traits make it a good candidate to cope with low pH and high metal concentration in biotechnological processes for treatment of metal-laden acidic streams at low and moderately high temperature.
Versão da editorahttp://pubs.acs.org/journal/esthag
Arbitragem científicayes
Aparece nas coleções:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
document_23404_1.pdf2,12 MBAdobe PDFVer/Abrir

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu Currículo DeGóis