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- Desorption (2)
- Sea level rise (2)
- AVS (1)
- Acid-volatile sulfide (1)
- Anoxic sediments (1)
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- Arsenic (1)
- Climate change (1)
- Dissolved sulfide (1)
- EXAFS (1)
- Elemental sulfur (1)
- Geographe Bay (1)
- Iron sulfides (1)
- Jarosite (1)
- Mackinawite (1)
- Metal mobilisation (1)
- Mobilization (1)
- Monosulfides (1)
- Monosulfidic black ooze (1)
- Orpiment (1)
- Pyrite (1)
- Sea-level rise (1)
- Seawater inundation (1)
- Simultaneously extracted metals (1)
- Sulfuric (1)
- Sulfide (1)
- Trace metals (1)
- Wetlands (1)
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Articles 1 - 29 of 29
Full-Text Articles in Physical Sciences and Mathematics
Modifications To The Classification Of Acid Sulfate Soil Material, Leigh Sullivan, R Fitzpatrick, Richard Bush, Edward Burton, P Shand, Nicholas Ward
Modifications To The Classification Of Acid Sulfate Soil Material, Leigh Sullivan, R Fitzpatrick, Richard Bush, Edward Burton, P Shand, Nicholas Ward
Associate Professor Edward D Burton
No abstract provided.
Reflooding The Exposed And Acidified Lower Lakes Sediments: Seawater Or River Murray Water, Leigh Sullivan, Richard Bush, Edward Burton, Nicholas Ward, L Barnett, L Mosley, R Seaman
Reflooding The Exposed And Acidified Lower Lakes Sediments: Seawater Or River Murray Water, Leigh Sullivan, Richard Bush, Edward Burton, Nicholas Ward, L Barnett, L Mosley, R Seaman
Associate Professor Edward D Burton
No abstract provided.
Lower Lakes Laboratory Study Of Contaminant Mobilisation Under Seawater And Freshwater Inundation (Long-Term Study), Leigh Sullivan, Richard Bush, Nicholas Ward, Diane Fyfe, M Johnston, Edward Burton, Paul Cheeseman, Michelle Bush, Crystal Maher, Michael Cheetham, K Watling, Vanessa Wong, R Maher, E Weber
Lower Lakes Laboratory Study Of Contaminant Mobilisation Under Seawater And Freshwater Inundation (Long-Term Study), Leigh Sullivan, Richard Bush, Nicholas Ward, Diane Fyfe, M Johnston, Edward Burton, Paul Cheeseman, Michelle Bush, Crystal Maher, Michael Cheetham, K Watling, Vanessa Wong, R Maher, E Weber
Associate Professor Edward D Burton
No abstract provided.
Bioremediation Of Acidic Lake-Bed Sediments Via Enhanced In-Situ Sulfate-Reduction: Lower Lakes, South Australia, Edward Burton, Leigh Sullivan, R Seaman, L Barnett, L Mosley, Nicholas Ward, Paul Cheeseman, Trent Mcintyre
Bioremediation Of Acidic Lake-Bed Sediments Via Enhanced In-Situ Sulfate-Reduction: Lower Lakes, South Australia, Edward Burton, Leigh Sullivan, R Seaman, L Barnett, L Mosley, Nicholas Ward, Paul Cheeseman, Trent Mcintyre
Associate Professor Edward D Burton
No abstract provided.
Study Of Monosulfidic Black Ooze (Mbo) In The Geographe Bay Area, Western Australia, Nicholas Ward, Richard Bush, Leigh Sullivan, Edward Burton, Paul Cheeseman
Study Of Monosulfidic Black Ooze (Mbo) In The Geographe Bay Area, Western Australia, Nicholas Ward, Richard Bush, Leigh Sullivan, Edward Burton, Paul Cheeseman
Associate Professor Edward D Burton
No abstract provided.
Lower Lakes Sulfate Reduction Study (Interim Report), Leigh Sullivan, Edward Burton, Nicholas Ward, Richard Bush, J Coughran, Diane Fyfe, Paul Cheeseman, Trent Mcintyre
Lower Lakes Sulfate Reduction Study (Interim Report), Leigh Sullivan, Edward Burton, Nicholas Ward, Richard Bush, J Coughran, Diane Fyfe, Paul Cheeseman, Trent Mcintyre
Associate Professor Edward D Burton
No abstract provided.
Lower Lakes Sulfate Reduction Study, Leigh Sullivan, Edward Burton, Nicholas Ward, Richard Bush, J Coughran, Michael Cheetham, Diane Fyfe, Paul Cheeseman, Trent Mcintyre
Lower Lakes Sulfate Reduction Study, Leigh Sullivan, Edward Burton, Nicholas Ward, Richard Bush, J Coughran, Michael Cheetham, Diane Fyfe, Paul Cheeseman, Trent Mcintyre
Associate Professor Edward D Burton
No abstract provided.
The Classification Of Acid Sulfate Soil Materials: Further Modifications, Leigh Sullivan, R Fitzpatrick, Richard Bush, Edward Burton, P Shand, Nicholas Ward
The Classification Of Acid Sulfate Soil Materials: Further Modifications, Leigh Sullivan, R Fitzpatrick, Richard Bush, Edward Burton, P Shand, Nicholas Ward
Associate Professor Edward D Burton
No abstract provided.
Acid Sulfate Soils: Their Characteristics, Risk Assessment, And Management Options, Leigh Sullivan, Richard Bush, Edward Burton
Acid Sulfate Soils: Their Characteristics, Risk Assessment, And Management Options, Leigh Sullivan, Richard Bush, Edward Burton
Associate Professor Edward D Burton
No abstract provided.
Sea-Level Rise Impacts On Coastal Water Quality: Interactions Between Porewater, Surfaceand Shallow Groundwater Geochemistry, Vanessa Wong, Scott Johnston, Phillip Hirst, Edward Burton, Richard Bush, Leigh Sullivan, Peter Slavich
Sea-Level Rise Impacts On Coastal Water Quality: Interactions Between Porewater, Surfaceand Shallow Groundwater Geochemistry, Vanessa Wong, Scott Johnston, Phillip Hirst, Edward Burton, Richard Bush, Leigh Sullivan, Peter Slavich
Associate Professor Edward D Burton
No abstract provided.
The Effects Of Increasing Salinity On Exchange Processes In Coastal Lowland Acid Sulfate Soils, Vanessa Wong, Scott Johnston, Richard Bush, Leigh Sullivan, Edward Burton, Peter Slavich
The Effects Of Increasing Salinity On Exchange Processes In Coastal Lowland Acid Sulfate Soils, Vanessa Wong, Scott Johnston, Richard Bush, Leigh Sullivan, Edward Burton, Peter Slavich
Associate Professor Edward D Burton
10 coastal lowland acid sulfate soils (CLASS) from floodplains in eastern Australia were subjected to increasing seawater concentrations to determine the effects of exchange processes on metal desorption due to increasing ionic strength. Soils were subjected to one of six treatments; 0%, 10%, 20%, 50%, 80% or 100% seawater diluted in deionised water. pH decreased with increasing seawater concentration. In general, concentrations of Al, Cd, Fe2+ and Mn increased in soils sampled from levees, organic and mineral sulfuric horizons with increasing salinity. Increasing trace metal concentrations with increasing seawater concentration is attributed to both exchange processes and pH effects. The …
Seawater Causes Rapid Trace Metal Mobilisation In Coastal Lowland Acid Sulfate Soils: Implications Of Sea Level Rise For Water Quality, Vanessa Wong, Scott Johnston, Edward Burton, Richard Bush, Leigh Sullivan, Peter Slavich
Seawater Causes Rapid Trace Metal Mobilisation In Coastal Lowland Acid Sulfate Soils: Implications Of Sea Level Rise For Water Quality, Vanessa Wong, Scott Johnston, Edward Burton, Richard Bush, Leigh Sullivan, Peter Slavich
Associate Professor Edward D Burton
Coastal floodplains are highly vulnerable to inundation with saline water and the likelihood of inundation will increase with sea level rise. Sediment samples from floodplains containing coastal lowland acid sulfate soils (CLASS) in eastern Australia were subjected to increasing seawater concentration to examine the probable effects of sea level rise on acidity and metal desorption. Ten soils were mixed with synthetic seawater concentrations varying from 0% to 100% at a solid:solution ratio of 1:10 for 4 h. There was a slight decrease in pH (≈0.5 units) with increasing seawater concentration following treatment, yet, calculated acidity increased significantly. In most soil …
Monosulfidic Black Ooze Accumulations In Sediments Of The Geographe Bay Area, Western Australia, Nicholas Ward, Richard Bush, Edward Burton, S Appleyard, S Wong, Leigh Sullivan, Paul Cheeseman
Monosulfidic Black Ooze Accumulations In Sediments Of The Geographe Bay Area, Western Australia, Nicholas Ward, Richard Bush, Edward Burton, S Appleyard, S Wong, Leigh Sullivan, Paul Cheeseman
Associate Professor Edward D Burton
Mobilisation of sedimentary monosulfidic black ooze (MBO) may result in rapid deoxygenation and acidification of surface waters, and release of potentially toxic metals. This study examines the extent and nature of MBO accumulation in the Geographe Bay area, Western Australia. MBO accumulations were found to be widespread in benthic sediments of the Geographe Bay area with acid-volatile sulfide (AVS) contents as high as 320 μmol g−1. The MBO materials often had unusually high dissolved sulfide (S−II) concentrations in their pore-waters (up to 610 mg L−1) and elevated elemental sulfur (S0) contents (up to 51 μmol g−1). Dissolved S−II is able …
Climate Change: A Frontier For Acid Sulfate Soil Research, Richard Bush, Leigh Sullivan, Scott Johnston, Edward Burton, Vanessa Wong, Annabelle Keene
Climate Change: A Frontier For Acid Sulfate Soil Research, Richard Bush, Leigh Sullivan, Scott Johnston, Edward Burton, Vanessa Wong, Annabelle Keene
Associate Professor Edward D Burton
Sea-level is predicted to continue to rise this century, threatening the integrity of coastal floodplains throughout the world. The low-lying elevation of much of the 17 million ha of acid-sulfate soils that occur worldwide, renders these landscapes particularly vulnerable to the impacts of climate change. Acid sulfate soils landscapes are regulated by redox driven biogeochemical processes that are sensitive to watertable dynamics, tidal exchange and temperature. The increased likelihood of extreme weather events such as drought and floods and rising global temperatures are directly relevant to the redox and hydrological processes that influence acid sulfate soil behaviour and their impact …
Hydrological Controls On Acid Generation And Export In Floodplain Wetlands, Scott Johnston, Annabelle Keene, Edward Burton, Richard Bush, Leigh Sullivan
Hydrological Controls On Acid Generation And Export In Floodplain Wetlands, Scott Johnston, Annabelle Keene, Edward Burton, Richard Bush, Leigh Sullivan
Associate Professor Edward D Burton
No abstract provided.
As, Fe And S Cycling During Reductive Biomineralisation Of Pedogenic Jarosite, Annabelle Keene, Scott Johnston, Edward Burton, Richard Bush
As, Fe And S Cycling During Reductive Biomineralisation Of Pedogenic Jarosite, Annabelle Keene, Scott Johnston, Edward Burton, Richard Bush
Associate Professor Edward D Burton
No abstract provided.
The Role Of Microbial Sulfidogenesis In Shaping Iron-Sulfur-Arsenic Interactions Within Floodplain Soils, Edward Burton, Scott Johnston, Richard Bush
The Role Of Microbial Sulfidogenesis In Shaping Iron-Sulfur-Arsenic Interactions Within Floodplain Soils, Edward Burton, Scott Johnston, Richard Bush
Associate Professor Edward D Burton
No abstract provided.
Assessing Acid Sulfate Soil Neutralising Capacity: A New Approach, Leigh Sullivan, K Watling, Salirian Claff, Richard Bush, Edward Burton, Scott Johnston, C Ahern, A Mcelnea
Assessing Acid Sulfate Soil Neutralising Capacity: A New Approach, Leigh Sullivan, K Watling, Salirian Claff, Richard Bush, Edward Burton, Scott Johnston, C Ahern, A Mcelnea
Associate Professor Edward D Burton
No abstract provided.
A New Method To Rapidly And Accurately Map Acid Sulfate Soils: Exploring The Utility Of An Em38, Vanessa Wong, J Triantafilis, Scott Johnston, T Nhan, Leigh Sullivan, Richard Bush, Edward Burton, Peter Slavich, P Hirst
A New Method To Rapidly And Accurately Map Acid Sulfate Soils: Exploring The Utility Of An Em38, Vanessa Wong, J Triantafilis, Scott Johnston, T Nhan, Leigh Sullivan, Richard Bush, Edward Burton, Peter Slavich, P Hirst
Associate Professor Edward D Burton
No abstract provided.
Hydro-Geochemical Coupling In Seawater Inundated Acid Sulfate Soils: Mobilisation Of Arsenic And Hysteresis In Iron And Sulfur Cycling, Scott Johnston, Annabelle Keene, Edward Burton, Richard Bush, Leigh Sullivan
Hydro-Geochemical Coupling In Seawater Inundated Acid Sulfate Soils: Mobilisation Of Arsenic And Hysteresis In Iron And Sulfur Cycling, Scott Johnston, Annabelle Keene, Edward Burton, Richard Bush, Leigh Sullivan
Associate Professor Edward D Burton
No abstract provided.
Reductive Biomineralisation Of Pedogenic Jarosite In Tidally Inundated Acid Sulfate Soils, Annabelle Keene, Scott Johnston, Edward Burton, Richard Bush, Leigh Sullivan
Reductive Biomineralisation Of Pedogenic Jarosite In Tidally Inundated Acid Sulfate Soils, Annabelle Keene, Scott Johnston, Edward Burton, Richard Bush, Leigh Sullivan
Associate Professor Edward D Burton
No abstract provided.
A Critical Evaluation Of Retained Acidity (Ar) Estimating Methods In Acid Base Account (Aba) Approach For Acid Sulfate Soils (Ass), Chamindra Vithana, Leigh Sullivan, Richard Bush, Edward Burton
A Critical Evaluation Of Retained Acidity (Ar) Estimating Methods In Acid Base Account (Aba) Approach For Acid Sulfate Soils (Ass), Chamindra Vithana, Leigh Sullivan, Richard Bush, Edward Burton
Associate Professor Edward D Burton
No abstract provided.
Understanding The Behaviour Of Schwertmannite And Jarosite In Acid Sulfate Soils, Chamindra Vithana, Leigh Sullivan, Richard Bush, Edward Burton
Understanding The Behaviour Of Schwertmannite And Jarosite In Acid Sulfate Soils, Chamindra Vithana, Leigh Sullivan, Richard Bush, Edward Burton
Associate Professor Edward D Burton
No abstract provided.
Readily Available Acidity In Schwertmannite, Chamindra Vithana, Leigh Sullivan, Richard Bush, Edward Burton
Readily Available Acidity In Schwertmannite, Chamindra Vithana, Leigh Sullivan, Richard Bush, Edward Burton
Associate Professor Edward D Burton
Schwertmannite and jarosite are considered as less soluble ironhydroxy sulfate minerals which are present in highly acidic environments (pH < 3). These minerals release acidity in the long run as they weather by hydrolysis [1]. However, 1M KCl extraction of soil samples (Clarence and Quartz) spiked with those two minerals showed that schwertmannite has some acidity that may be readily available.
Underestimation Of Retained Acidity Measured Using Chromium Suite In Acid Sulfate Soils Containing Schwermannite And Jarosite, Chamindra Vithana, Leigh Sullivan, Richard Bush, Edward Burton
Underestimation Of Retained Acidity Measured Using Chromium Suite In Acid Sulfate Soils Containing Schwermannite And Jarosite, Chamindra Vithana, Leigh Sullivan, Richard Bush, Edward Burton
Associate Professor Edward D Burton
No abstract provided.
Hydro-Geochemical Coupling In Seawater Inundation Acid Sulfate Soils: Mobilisation Of Arsenic And Hysteresis In Iron And Sulfur Cycling, Scott Johnston, Annabelle Keene, Edward Burton, Richard Bush, Leigh Sullivan
Hydro-Geochemical Coupling In Seawater Inundation Acid Sulfate Soils: Mobilisation Of Arsenic And Hysteresis In Iron And Sulfur Cycling, Scott Johnston, Annabelle Keene, Edward Burton, Richard Bush, Leigh Sullivan
Associate Professor Edward D Burton
A large-scale field trial indicates that tidal seawater inundation of coastal acid sulfate soils (CASS) stimulates iron and sulfate reducing conditions, leading to the generation of internal alkalinity and greatly decreasing soil / groundwater acidity. This remediation technique can be considered highly effective from the relatively narrow perspective of decreasing acidity and raising pH. However, a broader perspective reveals that tidal seawater inundation initiates complex and tightly coupled hydrological and geochemical processes within sediments and porewaters. These processes have had a profound effect on the mobilisation, redistribution and transformation of Fe minerals in the landscape (Johnston et al., 2011a) – …
Seawater-Induced Mobilization Of Trace Metals From Mackinawite-Rich Estuarine Sediments, Vanessa Wong, Scott Johnston, Edward Burton, Richard Bush, Leigh Sullivan, Peter Slavich
Seawater-Induced Mobilization Of Trace Metals From Mackinawite-Rich Estuarine Sediments, Vanessa Wong, Scott Johnston, Edward Burton, Richard Bush, Leigh Sullivan, Peter Slavich
Associate Professor Edward D Burton
Benthic sediments in coastal acid sulfate soil (CASS) drains can contain high concentrations (∼1–5%) of acid volatile sulfide (AVS) as nano-particulate mackinawite. These sediments can sequester substantial quantities of trace metals. Because of their low elevation and the connectivity of drains to estuarine channels, these benthic sediments are vulnerable to rapid increases in ionic strength from seawater incursion by floodgate opening, floodgate failure, storm surge and seasonal migration of the estuarine salt wedge. This study examines the effect of increasing seawater concentration on trace metal mobilization from mackinawite-rich drain sediments (210–550 μmol g−1 AVS) collected along an estuarine salinity …
Arsenic Mobilization And Iron Transformations During Sulfidization Of As(V)-Bearing Jarosite, Scott Johnston, Edward Burton, Annabelle Keene, Britta Planer-Friedrich, Andreas Voegelin, Mark Blackford, Greg Lumpkin
Arsenic Mobilization And Iron Transformations During Sulfidization Of As(V)-Bearing Jarosite, Scott Johnston, Edward Burton, Annabelle Keene, Britta Planer-Friedrich, Andreas Voegelin, Mark Blackford, Greg Lumpkin
Associate Professor Edward D Burton
Jarosite (KFe3(SO4) 2(OH)6) is an important host-phase for As in acid mine drainage (AMD) environments and coastal acid sulfate soils (CASS). In AMD and CASS wetlands, jarosite may encounter S(−II) produced by sulfate reducing bacteria. Here, we examine abiotic sulfidization of As(V)-bearing K-jarosite at pH 4.0, 5.0, 6.5 and 8.0. We quantify the mobilization and speciation of As and identify corresponding Fe mineral transformations. Sulfide-promoted dissolution of jarosite caused release of co-precipitated As and the majority of mobilized As was re-partitioned to a readily exchangeable surface complex (AsEx). In general, maximum As mobilization occurred in the highly sulfidized end-members of …
Decoupling Between Water Column Oxygenation And Benthic Phosphate Dynamics In A Shallow Eutrophic Estuary, Peter Kraal, Edward Burton, Andrew Rose, Michael Cheetham, Richard Bush, Leigh Sullivan
Decoupling Between Water Column Oxygenation And Benthic Phosphate Dynamics In A Shallow Eutrophic Estuary, Peter Kraal, Edward Burton, Andrew Rose, Michael Cheetham, Richard Bush, Leigh Sullivan
Associate Professor Edward D Burton
Estuaries are crucial biogeochemical filters at the land–ocean interface that are strongly impacted by anthropogenic nutrient inputs. Here, we investigate benthic nitrogen (N) and phosphorus (P) dynamics in relation to physicochemical surface sediment properties and bottom water mixing in the shallow, eutrophic Peel-Harvey Estuary. Our results show the strong dependence of sedimentary P release on Fe and S redox cycling. The estuary contains surface sediments that are strongly reducing and act as net P source, despite physical sediment mixing under an oxygenated water column. This decoupling between water column oxygenation and benthic P dynamics is of great importance to understand …