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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/2069

Title: Chemical behaviour of heavy metals and their bioavailability and toxicity to organisms: implications for environmental quality criteria
Authors: Pretorius, PJ
Linder, PW
Slabbert, JL
Wade, PW
Keywords: Heavy metals
Daphnia pulex
Multivariate analysis
Metal bioavailability
Chemical speciation modelling
Toxicity testing
Environmental quality
Multidisciplinary sciences
Issue Date: Sep-2001
Publisher: Acad Science South Africa
Citation: Pretorius, PJ, et al. 2001. Chemical behaviour of heavy metals and their bioavailability and toxicity to organisms: implications for environmental quality criteria. South African Journal of Science, vol. 97, 10 September, pp 431-434
Abstract: Observed mortalities of Daphnia pulex exposed to a single concentration of zinc in different test waters are explained in terms of the chemical behaviour of zinc in solution, as predicted by chemical speciation modelling. Multivariate correlation analysis indicates that the hydrated zinc species, Zn2+, was primarily responsible for the observed Daphnia mortality. Although this method provides useful results in a well-defined laboratory setting, its application to field conditions proves to be less certain because of our incomplete understanding of processes affecting metal speciation in complex natural systems. These results indicate that metal bioavailability should be accounted for in the management of metal discharges into the natural environment.
URI: http://hdl.handle.net/10204/2069
http://hdl.handle.net/10204/2069
Appears in Collections:Pollution and waste
Water resources and human health
General science, engineering & technology

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