Human health risk from consumption of aquatic species in arsenic-contaminated shallow urban lakes
| Autor: | Julian D. Olden, Samantha R. Fung, Marco Barajas, Brian P. Jackson, Rebecca B. Neumann, James E. Gawel, Pamela M. Barrett, Kenneth A. Burkart, Erin A Hull |
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| Rok vydání: | 2020 |
| Předmět: |
Geologic Sediments
Environmental Engineering 010504 meteorology & atmospheric sciences 010501 environmental sciences 01 natural sciences Pacifastacus Swamp Article Arsenic Lepomis Littoral zone Environmental Chemistry Animals Humans Profundal zone Waste Management and Disposal 0105 earth and related environmental sciences geography geography.geographical_feature_category biology Biota Plankton biology.organism_classification Pollution Lakes Bellamya Environmental chemistry Environmental science Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Sci Total Environ |
| ISSN: | 1879-1026 |
| Popis: | Arsenic (As) causes cancer and non-cancer health effects in humans. Previous research revealed As concentrations over 200 μg g(−1) in lake sediments in the south-central Puget Sound region affected by the former ASARCO copper smelter in Ruston, WA, and significant bioaccumulation of As in plankton in shallow lakes. Enhanced uptake occurs during summertime stratification and near-bottom anoxia when As is mobilized from sediments. Periodic mixing events in shallow lakes allow dissolved As to mix into oxygenated waters and littoral zones where biota reside. We quantify As concentrations and associated health risks in human-consumed tissues of sunfish [pumpkinseed (Lepomis gibbosus) and bluegill (Lepomis macrochirus)], crayfish [signal (Pacifastacus leniusculus) and red swamp (Procambarus clarkii)], and snails [Chinese mystery (Bellamya chinensis)] from lakes representing a gradient of As contamination and differing mixing regimes. In three shallow lakes with a range of arsenic in profundal sediments (20 to 206 μg As g(−1)), mean arsenic concentrations ranged from 2.9 to 46.4 μg g(−1) in snails, 2.6 to 13.9 μg g(−1) in crayfish, and 0.07 to 0.61 μg g(−1) in sunfish. Comparatively, organisms in the deep, contaminated lake (208 μg g(−1) in profundal sediments) averaged 11.8 μg g(−1) in snails and 0.06 μg g(−1) in sunfish. Using inorganic As concentrations, we calculated that consuming aquatic species from the most As-contaminated shallow lake resulted in 4–10 times greater health risks compared to the deep lake with the same arsenic concentrations in profundal sediments. We show that dynamics in shallow, polymictic lakes can result in greater As bioavailability compared to deeper, seasonally stratified lakes. Arsenic in oxygenated waters and littoral sediments was more indicative of exposure to aquatic species than profundal sediments, and therefore we recommend that sampling methods focus on these shallow zones to better indicate the potential for uptake into organisms and human health risk. |
| Databáze: | OpenAIRE |
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