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Titolo:
Biodegradation of dialkyl sulphosuccinate esters by streptomycetes
Autore:
Harichova, J; Proksova, M; Augustin, J; Toth, D;
Indirizzi:
Slovak Acad Sci, Inst Microbiol, SK-81434 Bratislava, Slovakia Slovak AcadSci Bratislava Slovakia SK-81434 -81434 Bratislava, Slovakia
Titolo Testata:
BIOLOGIA
fascicolo: 6, volume: 55, anno: 2000,
pagine: 675 - 682
SICI:
0006-3088(200012)55:6<675:BODSEB>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMAMONAS-TERRIGENA N3H; DIOCTYL SULFOSUCCINATE; DEGRADATION; CULTURE;
Keywords:
actinomycetes; streptomycetes; Streptomyces fradiae; dialkyl sulphosuccinates; biodegradation; anionic surfactants;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Harichova, J Slovak Acad Sci, Inst Microbiol, Stefanikova 3, SK-81434 Bratislava, Slovakia Slovak Acad Sci Stefanikova 3 Bratislava Slovakia SK-81434 a
Citazione:
J. Harichova et al., "Biodegradation of dialkyl sulphosuccinate esters by streptomycetes", BIOLOGIA, 55(6), 2000, pp. 675-682

Abstract

Eighteen strains of the genus Streptomyces and two strains of the genus Nocardia were tested for the ability of biodegradation of dialkyl sulphosuccinate esters [R-O-OC-CH2-CII(SO3Na)-CO-O-R] both under growth and non-growthconditions. Under non-growth conditions the process of primary biodegradation of di-1-hexyl sulphosuccinate (DHSS) by S. fradiae CCM 3174 can be ascribed to the first order reaction kinetics with optimum at pH 7.4 and optimal temperature 40 degreesC. The first order rate constant of primary biodegradation is linearly dependent on the biomass concentration within the concentration range 0.0-1.0 g/L (dry weight). Under growth conditions, biodegradation curve coincides with the growth curve. Supplementation of synthetic mineral medium with peptone and yeast extract facilitates both growth and biodegradation rates of DHSS. Supplementation with glucose facilitates growthand suppresses biodegradation rates, what can be explained by well-known catabolic repression of glucose on synthesis of many bacterial enzymes. Sulphosuccinate esters, similarly as other anionic surfactants show weak inhibitory effect on growth and biodegradation activity of streptomycetes strainsand it becomes fully evident at concentrations 750 mg/L. The incidence of biodegraders of sulphosuccinate esters among the studied actinomycetes strains was about 50%. This fact as well as high content of streptomycetes in soil and their ability as sporulants to survive extreme conditions shows that streptomycetes and generally actinomycetes can play a significant role inthe processes of bioremediation of soils polluted by anionic surfactants.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 08:44:30