title: Partitioning and bioaccumulation of metals from oil sands process affected water in indigenous Parachlorella kessleri.
abstract: This paper studies the partitioning and bioaccumulation of ten target metals ((53)Cr, Mn, Co, (60)Ni, (65)Cu, (66)Zn, As, (88)Sr, (95)Mo and Ba) from oil sands tailings pond water (TPW) by indigenous Parachlorella kessleri. To determine the role of extracellular and intracellular bioaccumulation in metal removal by P. kessleri, TPW samples taken from two oil sands operators (Syncrude Canada Ltd. and Albian Sands Energy Inc.) were enriched with nutrient supplements. Results indicate that intracellular bioaccumulation played the main role in metal removal from TPW; whereas extracellular bioaccumulation was only observed to some extent for Mn, Co, (60)Ni, (65)Cu, (88)Sr, (95)Mo and Ba. The FTIR scan and titration of functional groups on the cell surface indicated low metal binding capacity by indigenous P. kessleri. However, it is believed that the dissolved cations and organic ligand content in TPW (such as naphthenic acids) may interfere with metal binding on the cell surface and lower extracellular bioaccumulation. In addition, the total bioaccumulation and bioconcentration factor (BCF) varied during the cultivation period in different growth regimes.
authors.affiliation: Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada T6G 2W2.
authors.forename: Hamed
authors.initials: H
authors.lastname: Mahdavi
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Ania C
authors.initials: AC
authors.lastname: Ulrich
mesh_terms: D000416:Alberta; D000460:Chlorophyta / Q000378:metabolism*; D004784:Environmental Monitoring; D008670:Metals / Q000032:analysis / Q000378:metabolism*; D061329:Oil and Gas Fields / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical