Toxicity of Cold Lake Blend and Western Canadian Select dilbits to standard aquatic test species.

Autor: Barron MG; Gulf Ecology Division, U.S. EPA, Gulf Breeze, FL 32561, USA. Electronic address: barron.mace@epa.gov., Conmy RN; Land Remediation and Pollution Control Division, U.S. EPA, Cincinnati, OH 45268, USA., Holder EL; Pegasus Technical Services, Cincinnati, OH 45268, USA., Meyer P; Hydrosphere Research, Alachua, FL 32615, USA., Wilson GJ; Office of Emergency Management, U.S. EPA, Washington, DC 20460, USA., Principe VE; Office of Emergency Management, U.S. EPA, Washington, DC 20460, USA., Willming MM; Gulf Ecology Division, U.S. EPA, Gulf Breeze, FL 32561, USA.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2018 Jan; Vol. 191, pp. 1-6. Date of Electronic Publication: 2017 Oct 04.
DOI: 10.1016/j.chemosphere.2017.10.014
Abstrakt: Dilbits are blends of bitumen and natural gas condensates or crude oils with only limited toxicity data. Two dilbits, Cold Lake Blend and Western Canadian Select, were tested as either unweathered or weathered oils for acute and chronic toxicity to standard freshwater and estuarine organisms. Water accommodated fractions of the dilbits were characterized for total petroleum hydrocarbons (TPH), polycyclic aromatic hydrocarbons (PAHs), and monoaromatics (BTEX). Acute toxicity of unweathered and weathered dilbits ranged from 4 to 16 mg/L TPH, 8 to 40 μg/L total PAHs, and 0.7 to 16 mg/L BTEX in Ceriodaphnia dubia, Pimephales promelas, Americamysis bahia, and Menidia beryllina. Concentrations of weathered dilbits causing impaired growth (A. bahia) and reproduction (C. dubia) ranged from 0.8 to 3.5 mg/L TPH and 6 to 16 μg/L PAHs. The two dilbits had generally similar acute and short term chronic toxicity expressed as TPH or total PAHs as other crude oils and other petroleum products.
(Published by Elsevier Ltd.)
Databáze: MEDLINE
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