Biostimulation of metal-resistant microbial consortium to remove zinc from contaminated environments

Understanding the diversity and metal removal ability of microorganisms associated to contaminated aquatic environments is essential to develop metal remediation technologies in engineered environments. This study investigates through 16S rRNA deep sequencing the composition of a biostimulated microbial consortium obtained from the polluted Tietê River in São Paulo, Brazil. The bacterial diversity of the biostimulated consortium obtained from the contaminated water and sediment was compared to the original sample. The results of the comparative sequencing analyses showed that the biostimulated consortium and the natural environment had γ-Proteobacteria, Firmicutes, and uncultured bacteria as the major classes of microorganisms. The consortium optimum zinc removal capacity, evaluated in batch experiments, was achieved at pH=5 with equilibrium contact time of 120min, and a higher Zn-biomass affinity (KF=1.81) than most pure cultures previously investigated. Analysis of the functional groups found in the consortium demonstrated that amine, carboxyl, hydroxyl, and phosphate groups present in the consortium cells were responsible for zinc uptake..

Medienart:

Artikel

Erscheinungsjahr:

2016

Erschienen:

2016

Enthalten in:

Zur Gesamtaufnahme - volume:550

Enthalten in:

The science of the total environment - 550(2016), Seite 670-675

Sprache:

Englisch

Beteiligte Personen:

Mejias Carpio, Isis E [VerfasserIn]
Franco, Diego Castillo [Sonstige Person]
Zanoli Sato, Maria Inês [Sonstige Person]
Sakata, Solange [Sonstige Person]
Pellizari, Vivian H [Sonstige Person]
Seckler Ferreira Filho, Sidney [Sonstige Person]
Frigi Rodrigues, Debora [Sonstige Person]

Links:

Volltext
www.sciencedirect.com
www.ncbi.nlm.nih.gov

doi:

10.1016/j.scitotenv.2016.01.149

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

OLC1975215621