This study determines the effects of variations in suspended biomass, organic carbon, and pH on the time course of 2,2$ sp prime$,4,4$ sp prime$,5,5$ sp prime$-hexachlorobiphenyl uptake by laboratory cultures of Selenastrum capricornutum. Variations in pH had no effect, but uptake was enhanced by higher levels of biomass and depressed by higher levels of organic carbon. The coefficients for these measured effects on hexachlorobiphenyl were combined with existing relations based on molecular connectivity (X) or capacity ratio (K$ sp prime$) to yield semi-empirical equations to predict the instantaneous rate of uptake and bioconcentration factor (BCF) of organic contaminants as: eqalign{& rm Log rate = {-}3.30 + 0.32 X + 1.1 Log biomass {-}0.42 Log Abs cr& rm Log BCF = 4.11 + 0.86 Log K sp prime {-}0.87 Log biomass {-}0.22 Log Abs cr} / The utility of these equations was assessed by comparing time courses of hexachlorobiphenyl uptake predicted from them with time courses observed in water from eleven Quebec lakes.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.60078 |
| Date | January 1991 |
| Creators | Richer, Guylaine |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Biology.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001238671, proquestno: AAIMM67815, Theses scanned by UMI/ProQuest. |
Page generated in 0.002 seconds