Naslov
Toxicity of anionic and cationic surfactant to Acinetobacter junii in pure culture.

Autori
Hrenović, Jasna ; Ivanković, Tomislav

Izvornik
Central european journal of biology (1895-104X) 2 (2007), 3; 405-414

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
bacteria; enhanced biological phosphate removal; surfactant; toxicity; yeast

Sažetak
The harmful effects of surfactants to the environment are well known. We were interested in investigating their potential toxicity against the pure culture of phosphate (P)-accumulating bacteria Acinetobacter junii. The results proved a high acute toxicity of the sodium dodecyl sulfate (SDS) and hexadecyltrimethylammonium bromide (HDTMA) against A. junii. The estimated EC50 values of the HDTMA for the inhibition of CFUs in the pure culture of A. junii was 3.27± ; 1.12 x 10-7 mol L-1 and for the inhibition of the P-uptake rates 2.47± ; 0.51 x 10-6 mol L-1. For SDS, estimated EC50 values for the inhibition of CFUs in the pure culture of A. junii was 5.00± ; 2.95 x 10-6 mol L-1 and for the inhibition of the P-uptake rates 3.33± ; 0.96 x 10-4 mol L-1. The obtained EC50 values in the standardised yeast toxicity test using Saccharomyces cerevisiae were 3.03± ; 0.38 x 10-4 and 4.33± ; 0.32 x 10-5 mol L-1 for SDS and HDTMA, respectively. These results highlighted the need to control concentrations of surfactants entering the activated sludge system. The negative effects of these toxicants could highly diminish the role of P-accumulating bacteria as well as other eukaryotic organisms inhabiting activated sludge systems.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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