Uranium exposure to the tropical duckweed Lemna aequinoctialis and pulmonate snail Amerianna cumingi: fate and toxicity

Archives of Environmental Contamination and Toxicology
Alicia C HoganSuthidha Nou

Abstract

The discharge of catchment-management water from the Ranger uranium (U) mine into Magela Creek upstream of the Ramsar-listed Magela Floodplain in Kakadu National Park is an important part of the mine's water-management system. Because U is one of the primary toxicants associated with this water, a receiving-water trigger value (TV), based on chronic toxicity data from five local native species, was derived for U. To strengthen the data set underpinning the derivation of the TV, the chronic toxicity of U to two additional tropical freshwater species, duckweed Lemna aequinoctialis (96-hour growth rate), and pulmonate gastropod, Amerianna cumingi (96-hour reproduction), was determined. The fate of U within the test systems was an important component of the study because analysis of U concentrations during the snail tests indicated that a substantial proportion of U (approximately 25%) was being lost from the test solutions when integrated during the entire test duration. Analysis of the snails and their food for U indicated that only a small proportion that was lost from solution was being taken up by the snails. Therefore, the majority of U that was lost was considered unavailable to the snails, and thus the exposure concentratio...Continue Reading

References

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Citations

Jul 13, 2013·Environmental Science and Pollution Research International·R A van DamA W Storey
Jun 30, 2015·Environmental Toxicology and Chemistry·Andrew J HarfordRick A van Dam
Apr 25, 2013·Environmental Toxicology and Chemistry·Alicia C HoganRick A van Dam
Jun 18, 2016·The Science of the Total Environment·Paulo J C FavasPerumal Venkatachalam
Oct 26, 2016·Environmental Toxicology and Chemistry·Thomas J MooneyRick A van Dam
Dec 13, 2016·Integrated Environmental Assessment and Management·Rick A van DamAndrew J Harford
Nov 18, 2018·Environmental Toxicology and Chemistry·Thomas J MooneyAndrew J Harford
Sep 8, 2010·Environmental Toxicology and Chemistry·Rick A van DamAndrew J Harford
Nov 1, 2013·Comprehensive Reviews in Food Science and Food Safety·M van der SpiegelH J van der Fels-Klerx

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