Improved identification of sulfidic soil materials by a modified incubation method

Sullivan, Leigh A; Ward, Nicholas J; Bush, Richard T; Burton, Edward D

doi:10.1016/j.geoderma.2008.11.019

Cited by 23 publications

(21 citation statements)

References 26 publications

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“…This formed a layer approximately 2 mm thick when dried and was consistent with the protocol outlined by Sullivan et al (2009) for characterising sulphidic and sulphuric soils. Moisture content was varied either by adding water or allowing the soil to dry until the appropriate water content was achieved, as judged by weight.…”

Section: Moisture Content and Acid Productionsupporting

confidence: 75%

Positive and negative impacts of plants on acid production in exposed acid sulphate soils

Reid

Butcher

2011

Plant Soil

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This study examined the impact of plants on acid sulphate soils with the aim of determining whether plants are able to reduce acid production. The study was conducted with clayey acid sulphate soil under controlled conditions with treatments lasting up to 24 weeks and measurements made in the top 0-60 mm of soil. pH profiles in the soil were strongly dependent on soil moisture and the pattern of irrigation. When bare soil was allowed to dry down without further irrigation, there was very little acidification of either the surface or subsurface layers. Planting of Phragmites accelerated soil drying and caused extensive cracking and acidification of the subsoil under simulated drought conditions. Under a wetting and drying regime, both Phragmites and a surface spreading grass Paspalum increased soil acidification, while a surface spreading herbaceous shrub Cotula had little effect on acidification. There was no evidence that live plants could ameliorate acid sulphate soils. However, application of dead plant matter to the surface of the soil was effective in reducing acidification, especially if submerged.

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Section: Moisture Content and Acid Productionsupporting

confidence: 75%

Positive and negative impacts of plants on acid production in exposed acid sulphate soils

Reid

Butcher

2011

Plant Soil

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“…These are defined as soils which are, or have the potential to become, severely acidic as a result of iron sulfide oxidation (van Breemen, 1973;Fanning et al, 2002;Sullivan et al, 2009). These iron sulfides are most commonly in the form of pyrite (FeS 2 ) but may also include marcasite (FeS 2 ), greigite (Fe 3 S 4 ) and mackinawite (FeS) (Bush and Sullivan, 1997;Bush et al, 2004;Burton et al, 2008a).…”

Section: Introductionmentioning

confidence: 99%

“…Åström, 1998;Clark et al, 2000;Cappuyns et al, 2007;Tighe and Lockwood, 2007;Jamali et al, 2009;Rodríguez et al, 2009). This oxidative extraction also causes the oxidative dissolution of pyrite, a mineral of key importance in ASS (Cappuyns et al, 2007;Burton et al, 2008a;Sullivan et al, 2009). This procedure does not allow organic-and pyrite-bound iron to be distinguished, and is a major limitation of applying current sequential extraction procedures to ASS materials.…”

Section: Introductionmentioning

confidence: 99%

A sequential extraction procedure for acid sulfate soils: Partitioning of iron

et al. 2010

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“…Some studies have also demonstrated the processes of pyrite oxidation (Ward et al 2004;Sommer 2006;Sullivan et al 2009). These studies set up incubation experiments to simulate the sulphide oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

Spectral reflectance variations and mineral transformations during the formation of acid sulphate soil in an incubation experiment

Shi

Aspandiar

Oldmeadow

2014

International Journal of Remote Sensing

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Understanding the reflectance spectral variations associated with oxidation of iron sulphide materials is highly important to the detection of environmental changes affected by the detrimental acid mining drainage and acid sulphate soil (ASS) using hyperspectral sensing. An incubation experiment with iron-sulphide-rich sediments was set up to simulate the formation and evolution of ASS. The sediments were shaped into different micro-landforms. Spectral changes and mineral transformation were observed by comparing weekly measurements of the materials in the different landforms using an ASD (Analytical Spectral Devices) reflectance spectrometer, as well as comparing the measurements of the initial materials and the residual materials after oxidation. We found that the spectral changes usually occur at the spectral absorptions near 0.9 μm, which relate to ferric iron contents, near 1.17 μm, which relate to ferrous iron content, and near 2.265 μm, which relate to jarosite. Spectral variations are detected both in specific absorption position and depth. We also found that the causes of the spectral variations are mainly due to the variations in mineral transformation and consequent mineral composition, owing to lying in different oxidation stages and drainage conditions in the different landforms. This article shows not only oxidation of sulphides to different mineral phases spectrally but also the link of the phases with landforms and drainage conditions and the link between oxidation degree and oxidation progress, all of which have not been sufficiently studied before.

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Improved identification of sulfidic soil materials by a modified incubation method

Cited by 23 publications

References 26 publications

Positive and negative impacts of plants on acid production in exposed acid sulphate soils

Positive and negative impacts of plants on acid production in exposed acid sulphate soils

A sequential extraction procedure for acid sulfate soils: Partitioning of iron

Spectral reflectance variations and mineral transformations during the formation of acid sulphate soil in an incubation experiment

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