Colloidal stability in some tropical soils of southeastern Nigeria as affected by iron and aluminium oxides

Igwe, C. A.; Zarei, Mehdi; Stahr, Karl

doi:10.1016/j.catena.2009.01.003

Cited by 78 publications

(49 citation statements)

References 22 publications

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“…The pH-dependent colloid stability in Fig. 3 is in agreement with prior studies of water-dispersible colloid behavior from soils in America, Nigeria and Cameroon (Igwe et al, 2009;Nguetnkam and Dultz, 2011;Karathanasis, 1996, 1997).…”

Section: Stability Of Water-dispersible Soil Colloidssupporting

confidence: 89%

“…3) as confirmed by many previous studies (e.g. Goldberg et al, 1990;Igwe et al, 2009). Because organic coatings have been found to promote colloid dispersion (stability) by stearic hindrance (Kretzschmar et al, 1995), the decline of organic matter in older soils (Table 2) thus could lead to the decreasing colloid stability as soils age.…”

Section: Stability Of Water-dispersible Soil Colloidssupporting

confidence: 73%

“…Kretzschmar et al, 1995;Tarchitzky et al, 1993), the abundance of Fe and Al oxides (e.g. Goldberg et al, 1990;Igwe et al, 2009), and the type and amount of exchangeable cations (e.g. Levy and Torrento, 1995;Sequaris, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Pedogenesis significantly decreases the stability of water-dispersible soil colloids in a humid tropical region

et al. 2016

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The stability of soil colloids influences soil physicochemical properties, soil development, and transfer of nutrients and contaminants to surface and ground waters. A better understanding of soil colloids stability dynamics during soil evolution is important for the evaluation of soil's capacity to retain nutrients and/or accommodate toxic contaminants. This study was aimed to determine changes in the stability of water-dispersible soil colloids that accompany mineral transformation and surface charge evolution during pedogenesis using a well characterized chronosequence derived from basalt in the humid tropical region of Hainan Island, South China. The results demonstrated that the pH-dependent colloid stability decreased significantly with tropical soil development, which we attribute to the substantial changes in clay mineral compositions and colloid surface charge properties. Clay minerals in the studied chronosequence were characterized by an increase of kaolinite, gibbsite and Fe oxides and a decrease of quartz and halloysite towards more advanced stages of weathering, which resulted in the decline of permanent negative charges in the older soils. The point of zero charge (pH PZC ) increased while ΔpH decreased across the tropical soil chronosequence, being in good agreement with the observed lower colloid stability in aged soils dominated by kaolinitic minerals. Our study of colloid stability at long-term pedogenic time scale suggests young tropical soils (b 180 ka) with high surface charge are subjected to higher risk of clay movement and colloid-facilitated nutrients and contaminants transport. Careful management practices are thus required to avoid colloids dispersion and transport in young tropical soils either by reducing the frequency/intensity of pore-water flow or by liming to counter the high permanent negative charges.

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Section: Stability Of Water-dispersible Soil Colloidssupporting

confidence: 89%

Section: Stability Of Water-dispersible Soil Colloidssupporting

confidence: 73%

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Pedogenesis significantly decreases the stability of water-dispersible soil colloids in a humid tropical region

et al. 2016

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“…In soil profiles with lower soil organic matter (SOM) content, the main aggregation agents are Fe and Al oxides. The effect of these minerals on aggregate stability has been attributed to structural cementation, and is a subject extensively explored in the literature (Goldberg et al, 1988;Seta and Karathanasis, 1996;Pinheiro-Dick and Schwertmann, 1996;Barthès et al, 2008;Igwe et al, 2009). However, in soils with lower clay and Fe oxide content, aggregate stability is related to SOM (Six et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest

Hanke

Dick

2017

Rev. Bras. Ciênc. Solo

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Aggregate stability is one of the most important factors in soil conservation and maintenance of soil environmental functions. The objective of this study was to investigate the aggregate stability mechanisms related to chemical composition of organic matter in soil profiles with humic and histic horizons in a toposequence under Araucaria moist forest in southern Brazil. The soils sampled were classified as Humic Hapludox (highest position), Fluvaquentic Humaquepts (lowest slope position), and Typic Haplosaprists (floodplain). The C and N contents were determined in bulk soil samples. The chemical composition of soil organic matter was evaluated by infrared spectroscopy. Aggregate stability was determined by applying increasing levels of ultrasound energy. Carbon content increased from the top of the slope to the alluvial plain. Higher ultrasonic energy values for clay dispersion were observed in the C-rich soils in the lower landscape positions, indicating that organic compounds play an important role in the structural stabilization of these profiles. Both aliphatic and carbohydrate-like structures were pertinent to aggregate stability. In the Oxisol, organo-mineral interaction between carbohydrates and the clay mineral surface was the most important mechanism affecting aggregation. In soils with a higher C content (Humaquepts and Haplosaprists), stabilization is predominantly conferred by the aliphatic groups, which is probably due to the structural protection offered by these hydrophobic organic groups.

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“…No es el único autor que así lo determina. Igwe et al (2009), en estudios realizados en Nigeria, también concluyen que el papel del carbón orgánico no es determinante si no hay elementos que pueden llegar a oxidarse.…”

Section: Resultados Y Discusiónunclassified

Estabilidad de los agregados de un suelo quemado a diferentes intensidades de fuego dieciocho años después de un incendio forestal

Velasco¹,

Úbeda

2014

CIG

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Colloidal stability in some tropical soils of southeastern Nigeria as affected by iron and aluminium oxides

Cited by 78 publications

References 22 publications

Pedogenesis significantly decreases the stability of water-dispersible soil colloids in a humid tropical region

Pedogenesis significantly decreases the stability of water-dispersible soil colloids in a humid tropical region

Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest

Estabilidad de los agregados de un suelo quemado a diferentes intensidades de fuego dieciocho años después de un incendio forestal

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