Precipitation of Zn(II), Cu(II) and Pb(II) at bench-scale using biogenic hydrogen sulfide from the utilization of volatile fatty acids.
Chemosphere
; 66(9): 1677-83, 2007 Jan.
Article
em En
| MEDLINE
| ID: mdl-16979215
Biological production of hydrogen sulfide (H(2)S) using sulfate-reducing bacteria (SRB) has important potential within environmental biotechnology. The aim of this work was to study the possibility of using SRB for the treatment of an acid mine drainage (AMD) at bench-scale. This process involved three stages: the optimization of H(2)S production through the utilization of total volatile fatty acids (TVFAs) by SRB, the establishment of a biofilm reactor for sulfide production, and the precipitation of metals by using the biologically produced H(2)S. The substrates used for TVFAs production consisted of papaya, apple and banana. The H(2)S produced from the degradation of TVFAs was utilized for the precipitation of a metal-contaminated effluent collected from Bolivar mine (Oruro, Bolivia). The maximum concentration of H(2)S obtained was approximately 16mM. Removal efficiencies of ca. 100% for copper, above 94% for zinc, and above 92% for lead were achieved.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Bactérias
/
Poluentes Químicos da Água
/
Poluição da Água
/
Biofilmes
/
Metais Pesados
/
Reatores Biológicos
/
Ácidos Graxos
/
Sulfeto de Hidrogênio
País/Região como assunto:
America do sul
/
Bolivia
Idioma:
En
Revista:
Chemosphere
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Suécia
País de publicação:
Reino Unido