Data/hora: 11/06/2024 16:49:29

Provedor de dados: | 5
País: | France
Título: | Chitin/toxicant interactions and microbial degradation within estuarine ecosystems.
Autores: | Portier, R; Meyers, S.
Data: | 1984-10
Ano: | 1984
Palavras-chave: | Controlled conditions; Chemical pollutants; Industrial wastes; Pesticides; Metabolism; Food webs; Biodegradation; Ecosystems; Microorganisms; Environmental effects; Brackishwater pollution; Estuaries; Toxicants; Chitin.
Resumo: | The environmental effect and fate of several agricultural and industrial source toxicants were evaluated in controlled laboratory microcosm systems in the presence of the aminopolysaccharide polymer, chitin. Toxicants examined included methyl parathion, phenol, pentachlorophenol, 2,4 dichlorophenol, 1,2 dichloroethane and Kepone. Microcosm operating parameters, including pH/Eh, salinity, temperature, flow rate and sediment/water interface conditions, were based on comparable in situ measurements. Fate analysis predictions were based on mineralization of the parent toxicant compound as measured by chromatographic analysis or super(14)CO sub(2) expiration. Chitin, amended to continuous flow microcosms, promoted either cometabolic or cooxidative biotransformation for each toxicant as a result of epiphytic cross-coupling of toxicant and aminopolysaccharide. In the absence of chitin, toxicant/substrate biotransformation profiles were significantly altered. A ranking profile of relative postulated toxicity to the aquatic food web can be determined for each chemical class using this microcosm approach.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1984/acte-1011.pdf
Editor: | Actes de colloques. Ifremer Brest [ACTES COLLOQ. IFREMER.]. 1986
Relação: | http://archimer.ifremer.fr/doc/00000/1011/
Formato: | application/pdf