Rozklad weglowodorow aromatycznych w srodowisku wodnym

• Autorzy: Bogacka T. , Makowski Z. , Ceglarski R.

Warianty tytułu

EN

The breakdown of the aromatic hydrocarbons in aqueous environment

• Języki publikacji: PL

Abstrakty

PL

Określono dynamikę i kinetykę rozkładu w wodzie węglowodorów aromatycznych (benzen, toluen, o-, m-, p-ksylen oraz styren) stanowiących zagrożenie dla ludzi z uwagi na ich toksyczność oraz właściwości mutagenne i kancerogenne. Badania prowadzono w warunkach symulujących wodę rzeczną i ekosystem wodny uwzględniając różne stężenia początkowe węglowodorów i temperatury oraz wpływ na rozkład tych związków zdolności adaptacyjnych mikroflory i właściwości kumulacyjnych.

EN

The purpose of this study was to establish the dynamics and kinetics of the aromatic hydrocarbons breakdown in aqueous environment. The investigated compounds were: benzene, toluene, m-xylene, p-xylene and styrene. These substances even in low concentrations threaten surface waters taken for municipal purposes because of their toxicity and also mutagenic and cancerigenic properties. The study was carried out under model conditions simulating the environment of river water moderately contaminated and laboratory water ecosystem. The obtained results indicide that the concentration of aromatic hydrocarbons, river microflora adapted to the environment of aromatic hydrocarbons as well as decreased temperature affected the process of the aromatic hydrocarbons' degradation. Due to the significant evaporation, the studied compounds are present in river water only for a short period of time. The half-times calculated in accordance with the kinetic equation of 1st order amounted to 1.1 - 8.7 days; the contribution of evaporation was on average 28%. When the microflora had been adapted to the presence of these compounds, the process of degradation was as rule more rapid for both investigated temperatures (20°C and 8°C) and for most of the series. This process was slowed down by temperature fall to about 8°C, but only in the range of low concentrations (1-32 mg/l). This regularity was not observed for higher concentrations up to 146 mg/l. The mixture of aromatic hydrocarbons at concentrations of 3.14 - 37.11 mg/l, exposed for 20 days to water ecosystem under dynamic conditions was reduved up to 99%. The investigated aromatic hydrocarbons were not absorbed by Elodea canadesis and Physa fortinalis and were weakly condensed in Lebistes reticulatis (cumulation coefficients - 0.5 - 22.8). In the case of bottom sediments, it was stated that these compounds were not cumulated. The investigated concentrations of aromatic hydrocarbons didn't have a positive or negative effect on the aquatic biocenosis settled in the ecosystem.

Słowa kluczowe

PL

wlasciwosci kancerogenne; rozklad; weglowodory aromatyczne; kinetyka rozkladu; wody powierzchniowe; wlasciwosci mutagenne; dynamika rozkladu; zanieczyszczenia srodowiska; toksycznosc

EN

carcinogenic property; aromatic hydrocarbon; surface water; mutagenic property; environment contaminant; toxicity

• Wydawca: -
• Czasopismo: Roczniki Państwowego Zakładu Higieny
• Rocznik: 1997
• Tom: 48
• Numer: 2
• Opis fizyczny: s.149-161,tab.,wykr.,bibliogr.

Twórcy

autor

Bogacka T.

• Instytut Meteorologii i Gospodarki Wodnej, ul.Jaskowa Dolina 29, 80-252 Gdansk

autor

Makowski Z.

autor

Ceglarski R.