Impacts of runoff from sulfuric soils on sediment chemistry in an estuarine lake.

摘要: Abstract The impact of runoff from sulfuric soils in the heavily drained Cudgen Lake floodplain, eastern Australia on water quality and downstream coastal lake sediments has been examined. oxidation sulfidic transformation into leads to changes not only upper soil profile but also affects drainage chemistry bottom receiving waters. Oxidation transforms a sink for sulfur metals significant source environments. Sulfuric within catchment contain 9.18×10 5 mol H + per hectare as well elevated concentration (e.g. Al, Fe, Mn) sulfate. These products are transported efficiently by constructed network system. acid volatile (AVS), chromium reducible (CRS), total sulfur, organic carbon, reactive iron contents present solid phase reported. AVS/CRS, DOP DOS values observed show that natural monosulfide formation near surface enhanced due increased inputs matter, sulfate, ferrous other following development catchment. There concentrations As, Cd, Cr, Hg, Zn Pb) layer monsulfidic compared with underlying pyritic some which exceed sediment guidelines. could be released dredging or through re-suspension during high flow conditions enter food chain.