Please use this identifier to cite or link to this item: https://scidar.kg.ac.rs/handle/123456789/11453
Title: Heavy metal tolerance and removal potential in mixed-species biofilm
Authors: Grujić J.
Vasić, Sava
Čomić, Ljiljana
Ostojić, Aleksandar
Radojevic, Ivana
Journal: Water Science and Technology
Issue Date: 1-Aug-2017
Abstract: © IWA Publishing 2017. The aim of the study was to examine heavy metal tolerance (Cd2+, Zn2+, Ni2+ and Cu2+) of single- and mixed-species biofilms (Rhodotorula mucilaginosa and Escherichia coli) and to determine metal removal efficiency (Cd2+, Zn2+, Ni2+, Cu2+, Pb2+ and Hg2+). Metal tolerance was quantified by crystal violet assay and results were confirmed by fluorescence microscopy. Metal removal efficiency was determined by batch biosorption assay. The tolerance of the mixed-species biofilm was higher than the single-species biofilms. Single- and mixed-species biofilms showed the highest sensitivity in the presence of Cu2+ (E. coli-MIC 4 mg/ml, R. mucilaginosa-MIC 8 mg/ml, R. mucilaginosa/E. coli-MIC 64 mg/ml), while the highest tolerance was observed in the presence of Zn2+ (E. coli-MIC 80 mg/ml, R. mucilaginosa-MIC 161 mg/ml, R. mucilaginosa-E. coli-MIC 322 mg/ml). The mixed-species biofilm exhibited better efficiency in removal of all tested metals than single-species biofilms. The highest efficiency in Cd2+ removal was shown by the E. coli biofilm (94.85%) and R. mucilaginosa biofilm (97.85%), individually. The highest efficiency in Cu2+ (99.88%), Zn2+ (99.26%) and Pb2+ (99.52%) removal was shown by the mixed-species biofilm. Metal removal efficiency was in the range of 81.56%-97.85% for the single- and 94.99%-99.88% for the mixed-species biofilm.
URI: https://scidar.kg.ac.rs/handle/123456789/11453
Type: journal article
DOI: 10.2166/wst.2017.248
ISSN: 02731223
SCOPUS: 85027725903
Appears in Collections:Faculty of Science, Kragujevac

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