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Titolo:
Toxicity of copper in an oxic stream sediment receiving aquaculture effluent
Autore:
Huggett, DB; Schlenk, D; Griffin, BR;
Indirizzi:
Univ Mississippi, Dept Pharmacol Environm & Community Hlth Res, University, MS 38677 USA Univ Mississippi University MS USA 38677 th Res, University, MS 38677 USA USDA, Stuttgart Natl Aquaculture Res Ctr, Stuttgart, AR 72160 USA USDA Stuttgart AR USA 72160 Aquaculture Res Ctr, Stuttgart, AR 72160 USA
Titolo Testata:
CHEMOSPHERE
fascicolo: 3, volume: 44, anno: 2001,
pagine: 361 - 367
SICI:
0045-6535(200107)44:3<361:TOCIAO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHANNEL CATFISH; METALS; BIOAVAILABILITY; BINDING; SULFATE; PONDS;
Keywords:
copper sulfate; aquaculture; sediment; Typha latifolia; Hyalella azteca;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Huggett, DB Univ Mississippi, Dept Pharmacol Environm & Community Hlth Res, University, MS 38677 USA Univ Mississippi University MS USA 38677 ersity, MS 38677 USA
Citazione:
D.B. Huggett et al., "Toxicity of copper in an oxic stream sediment receiving aquaculture effluent", CHEMOSPHERE, 44(3), 2001, pp. 361-367

Abstract

Sediments were collected from a stream (upstream, outfall and downstream) receiving copper laden catfish pond effluent to assess toxicity to non-target biota. No significant reduction in Hyalella azteca survival or growth (10 d), or Typha latifolia germination and root and shoot growth (7 d) were observed after exposure to upstream and outfall sediments. A significant reduction in H. azteca survival was observed after exposure to the downstream sediment sample; however, no reduction in T. latifolia germination or seedling growth was detected. Bulk sediment copper concentrations in the upstream, outfall and downstream samples were 29, 31, and 25 mg Cu/kg dry weight, respectively. Interstitial water (IW) concentrations ranged from 0.053 to 0.14 mg Cu/l with 10 d IW toxicity units greater than or equal to 0.7. Outfall samples were amended with additional concentrations of copper sulfate sothat bulk sediment measured concentrations in the amended samples were 172, 663, 1245, and 1515 mg Cu/kg dry weight. Survival was the most sensitive endpoint examined with respect to H. azteca with a no observed effects concentration (NOEC) and lowest observed effects concentration (LOEC) of 1245 and 1515 mg Cu/kg, respectively. NOEC and LOEC for T. latifolia root growth were 663 and 1245 mg Cu/kg, respectively. IW copper concentrations were greater than or equal to 0.86 mg Cull with H. azteca intersitial water toxicity unit (IWTU) concentrations greater than or equal to 1.2, Sequential extraction qualitatively revealed the carbonate and iron oxide fractions which accounted for a majority of the copper binding. In this instance, the copperwhich was applied to catfish ponds does not appear to be adversely impacting the receiving stream system. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:44:45