Monitoring and assessment of surface water acidification following rewetting of oxidised acid sulfate soils

@article{Mosley2013MonitoringAA,
  title={Monitoring and assessment of surface water acidification following rewetting of oxidised acid sulfate soils},
  author={Luke M. Mosley and Benjamin Zammit and A. M. Jolley and Liz Barnett and Rob W. Fitzpatrick},
  journal={Environmental Monitoring and Assessment},
  year={2013},
  volume={186},
  pages={1-18}
}
Large-scale exposure of acid sulfate soils during a hydrological drought in the Lower Lakes of South Australia resulted in acidification of surface water in several locations. Our aim was to describe the techniques used to monitor, assess and manage these acidification events using a field and laboratory dataset (n = 1,208) of acidic to circum-neutral pH water samples. The median pH of the acidified (pH < 6.5) samples was 3.8. Significant (p < 0.05) increases in soluble metals (Al, Co, Mn, Ni… Expand
Porewater geochemistry of inland Acid sulfate soils with sulfuric horizons following postdrought reflooding with freshwater.
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It is proposed that low pH conditions inhibited the activity of SO-reducing bacteria and, in turn, the in situ generation of alkalinity through pyrite production, leading to in situ changes to soil acidity and abundance of metals and metalloids. Expand
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Results from 2-dimensional modelling of the river-floodplain hydrological processes were consistent with field measurements during the drying phase and illustrated how the declining river levels led to floodplain acidification. Expand
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For dilutions of the drainage waters of less than 1% with Murray River water, none of the metals should exceed the WQGs, however, the high concentrations of metals associated with fine precipitates within the receiving waters may represent a risk to some aquatic organisms. Expand
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Results indicate that rapid in-field assessments of net acidity in acidic, Al dominated waters may be an indicator of potential acute and sub-chronic impacts on aquatic organisms. Expand
Effect of cyclic redox oscillations on water quality in freshwater acid sulfate soil wetlands.
TLDR
It is suggested that retaining surface water in ASS wetlands for ~8weeks after a dry-wet transition will allow sufficient time for alkalinity producing reductive processes to ameliorate most surface water acidity. Expand
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TLDR
This study presents spatiotemporal changes of dissolved inorganic carbon and water - to- air interface CO2 flux in the two of Australia's largest connected, yet geomorphically different freshwater lakes (Lake Alexandrina and Lake Albert, South Australia), during drought and post-drought. Expand
Geochemical processes following freshwater reflooding of acidified inland acid sulfate soils: An in situ mesocosm experiment
Abstract In their oxidised form, inland acid sulfate soils (IASS) with sulfuric horizons (pH ≤ 3.5) contain substantial acidity and pose a number of threats to surrounding ecosystems. In theirExpand
Extreme drought decouples silicon and carbon geochemical linkages in lakes.
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