title: Chemical and physical speciation of arsenic in a small pond receiving gold mine waste effluent.
abstract: The chemical and physical speciation of arsenic in a small pond that receives wastewater from a gold mine operation in western Victoria, Australia was studied using differential pulse polarography. By using different sample pretreatments, distinction between the physical states (dissolved or particulate As), between the oxidation states (As(III) or As(V)), and between the degrees of lability (labile or strongly bound) was achieved. The results are interpreted in terms of the physicochemical properties with reference to the use of the pond as a settlement dam for gold mining effluent. The speciation of arsenic was found to vary markedly with the physicochemical properties of the water. A model for the behavior of arsenic in the pond is proposed.
authors.affiliation: School of Ecology and Environment, Deakin University, P.O. Box 423, Victoria 3280, Warrnambool, Australia.
authors.forename: Rachel
authors.initials: R
authors.lastname: Sproal
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Turoczy
authors.forename: Frank
authors.initials: F
authors.lastname: Stagnitti
mesh_terms: D000818:Animals; D001151:Arsenic / Q000737:chemistry*; D001682:Biological Availability; D004784:Environmental Monitoring; D005399:Fishes; D006046:Gold; D007220:Industrial Waste; D008906:Mining; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D012995:Solubility; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D007220:Industrial Waste; D014873:Water Pollutants; D006046:Gold; D001151:Arsenic