Abstract/Details

A Tier 1 risk assessment of the PACs in the base/neutral extract from mature oil sands fine tailings porewater

Madill, Robert Ernest Alvin.   University of Guelph (Canada) ProQuest Dissertations Publishing,  1998. MQ33249.

Abstract (summary)

Mature oil sands fine tailings (MFTs) pose a large environmental problem in northern Alberta. GC-MS analyses of the base/neutral (B/N) extract of MFTs PW showed the presence of PACa, such as naphthalene, phenanthrene, dibenzothiophene, fluoranthene, pyrene, chrysene, and their alkylated derivatives. Concentrations of individual PACs did not exceed 500 ng/L, with a total concentration of 2.6 $\mu$g/L.

A calculated benzo (a) pyrene equivalent quotient (BEQ) of the B/N extracts mutagenic potential was equivalent to 0.14 $\mu$g of B (a) P/L. A negative mutagenic response was indicated in strain TA98 and TA100 in the presence of metabolic activation. Ames testing of the concentrated BM extracts in TA98 and TA100 resulted in no detectable positive mutagenic response to detection limits of 0.99 $\mu$g of B (a) P/L (TA98) and 6.3 $\mu$g of B (a) P/L (TA100). A Tier 1 risk assessment, under a worst case scenario, showed no evidence of risk to the wet landscape strategy from the MFTs PW.

Indexing (details)


Subject
Toxicology;
Environmental science
Classification
0383: Toxicology
0768: Environmental science
Identifier / keyword
Health and environmental sciences
Title
A Tier 1 risk assessment of the PACs in the base/neutral extract from mature oil sands fine tailings porewater
Author
Madill, Robert Ernest Alvin
Number of pages
203
Degree date
1998
School code
0081
Source
MAI 37/02M, Masters Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
978-0-612-33249-2
Advisor
Bunce, Nigel J.
University/institution
University of Guelph (Canada)
University location
Canada -- Ontario, CA
Degree
M.Sc.
Source type
Dissertation or Thesis
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
MQ33249
ProQuest document ID
304434512
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
https://www.proquest.com/docview/304434512