EXTRACTABLE Fe, Al, Si AND C IN B HORIZONS OF PODZOLIC AND BRUNISOLIC SOILS FROM ONTARIO

Evans, L. J.; Wilson, Ward

doi:10.4141/cjss85-052

Cited by 45 publications

(22 citation statements)

References 21 publications

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“…An avarage depth of 13.5 ± 3.5 cm has been estimated by Evans (1982). These B horizon soils have been previously examined by Evans and Wilson (1985) and found to represent a wide range of organic C and pyrophosphate Fe and Al contents comparable with their contrasting podzol development. The profiles had formed in strongly acidic upland sites located within the Missinaibi-Cabonga Section of the Boreal Forest Region (Rowe 1972).…”

Section: Field Sitesmentioning

confidence: 99%

“…Crystalline (Fe and Al) c and inorganic amorphous (Fe and Al) a hydrous oxide phases were estimated using these extractants. The experimental conditions for the extractions of Fe, Al, and Si are given in Evans and Wilson (1985). Organic carbon (C) was determined by an autoanalyzer technique, following ultra violet irradiation of acidic samples, using phenolphthalein for colour development (Technicon 1978).…”

Section: Soil Chemical Analysismentioning

confidence: 99%

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Sulphate sorption in relation to properties of podzolic and brunisolic soils in northeastern Ontario

Bhatti¹,

Foster²,

Evans³

1997

Can. J. Soil. Sci.

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Sulphate sorption in relation to properties of podzolic and brunisolic soils in northeastern Ontario. Can. J. Soil Sci. 77: 397-404. An insight into sulphate (SO 4 2-) retention by podzolic and brunisolic soils was obtained by examining SO 4 2-sorption by B horizons from forest soils in northeastern Ontario. The amount of water soluble and adsorbed SO 4 2-present in the soils and the ability to adsorb additional SO 4 2-was evaluated. Relationships between soil pH, organic carbon and different iron (Fe) and aluminum (Al) fractions with water soluble and adsorbed SO 4 2-were examined. Using a surface complexation approach, modelling was carried out to predict the soil SO 4 2-sorption capacity at any given pH. The potential SO 4 2-adsorption capacity was also measured by applying adsorption equations. Both the Freundlich and Langmuir sorption isotherms gave comparative fits to the SO 4 2-adsorption data. The soils contained small amounts of water extractable SO 4 2-(0.1 to 0.8 mmole kg -1 ). There was a significant positive correlation between water extractable SO 4 2-and organic carbon in the podzolic soils but not for the brunisolic soils. Approximately 90 % of the sulphate extracted was contained in the insoluble SO 4 2-fraction. Sulphate sorption by both soil types was most closely related to amorphous inorganic Al. In brunisolic soils, total adsorbed SO 4 2-also had a strong positive correlation with the oxalate extractable silica fraction and a negative correlation with pH. Sulphate adsorption simulations were close to the measured values. 2-extractible dans l'eau et celles de C organique dans les sols podzoliques, mais pas dans les sols brunisoliques. Environ 90 % des sulfates extraits provenaient de la fraction SO 4 2-insoluble. La sorption des sulfates par les deux types de sol était particulièrement reliée à l'abondance de A1 minéral amorphe. Dans les brunisols, le SO 4 2-adsorbé total exhibait une forte corrélation positive avec la fraction silice extractible dans l'oxalate et une corrélation négative avec le pH. Les mesures en simulation de l'adsorption des sulfates étaient proches des valeurs réelles observées.

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Section: Field Sitesmentioning

confidence: 99%

Section: Soil Chemical Analysismentioning

confidence: 99%

Sulphate sorption in relation to properties of podzolic and brunisolic soils in northeastern Ontario

Bhatti¹,

Foster²,

Evans³

1997

Can. J. Soil. Sci.

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“…the content and profile distribution patterns of free iron oxides, degree of their crystallisation and complexation with organic matter are crucial criteria in the assessment of the degree of soil mineral substrates transformation during pedogenesis and advancement of some soil-forming processes [1,6,7,10,18,19,20].…”

mentioning

confidence: 99%

Characteristics of Iron and Aluminium Forms and Quantification of Soil Forming Processes in Chernozems in Western Slovakia

Jończak

Šimanský

2016

pjss

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Abstract. the studies on iron and aluminium forms and soil forming processes quantification in Chernozems were conducted in two localities in Western Slovakia. two soil pits were done in a complex of arable haplic Chernozems in Krakovany and two soil pits representing arable and forest Cambic Chernozems were done in Báb. the soils were sampled every 10 cm and analysed using standard methods. Based on analytical results, profile development indices (PDI) were calculated for each profile. Chernozems in Krakovany were characterised by 90 cm (Krakovany 1) and 80 cm (Krakovany 2) thick solums and ph increasing with depth from neutral to alkaline. the content of total organic carbon (tOC) was up to 13.70 g kg -1 in both profiles. Cambic Chernozems in Báb were characterised by a lower thickness of solum -40 cm in arable soil (Báb 1) and 70 cm in forest soil (Báb 2). Reaction of arable soil ranged from slightly acid to alkaline, and in the case of forest soil -from strongly acid to alkaline. Arable soil contained 14.2-14.5 g kg -1 , and forest soils 12.9-50.7 g kg -1 of tOC in A horizons. the content of Fe t in the studied soils ranged from 21.78 to 32.48 g kg . Fe d /Fe t ratios ranged from 0.26 to 0.39. Crystalline forms predominated over amorphous ones. the values of PDI were relatively low, namely 1.50 -in the profile Krakovany 1; 1.76 -in the profile Krakovany 2; 1.15 in the profile Báb 1 and 2.12 -in the profile Báb 2.

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“…Sodium pyrophosphate was used to extract the organically bound Fe and Al, (Fe p and Al p ). The concentration of the inorganic poorly crystalline Fe fraction, Fe p -Fe p, was calculated from the difference between poorly crystalline and organically bound oxides (Evans and Wilson, 1985). Soil pH was measured potentiometrically in a 1:1 water to soil suspensions by using a combined pHelectrode.…”

Section: Methodsmentioning

confidence: 99%

Effect of Soil Chemical and Physical Properties on Cd Mobility Studied by Soil Thin-Layer Chromatography

Aloud¹,

EL-Saeid²,

Nadeem³

2014

Curr World Environ

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Heavy metals contamination threat to the environment is a big concern. Predicting the movement of heavy metals such as Cd in soil is an important goal. In this study the effect of soil chemical and physical properties on Cd mobility were done using a thin layer chromatography (Soil TLC). The soils used in this research have a wide range of organic matter (2.1-29 g/kg), pH value (4.9-8.8), CEC (4.1-99 cmol/kg), bases saturation, iron and aluminum oxides to examines its effect on Cd mobility. The (Rf) values obtained from soil thin layer chromatography ranged from 0.25 to 0.95 and it showed that Cd was slightly mobile in 64 %, moderately mobile in 29 % and very mobile in 7 % of the soils. The Rf indicates that Cd mobility would decrease with increasing amounts of iron oxide fractions; silt % and exchangeable Mg 2+ in the soils. Rcd values increased with increasing amounts of the iron oxide fractions (Feo, Fep, and Fed); silt % and exchangeable Mg 2+ in the soils. Finally, both Rcd and Rf factors showed Cd mobility to be higher in those soils with a high percentage of sand.

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EXTRACTABLE Fe, Al, Si AND C IN B HORIZONS OF PODZOLIC AND BRUNISOLIC SOILS FROM ONTARIO

Cited by 45 publications

References 21 publications

Sulphate sorption in relation to properties of podzolic and brunisolic soils in northeastern Ontario

Sulphate sorption in relation to properties of podzolic and brunisolic soils in northeastern Ontario

Characteristics of Iron and Aluminium Forms and Quantification of Soil Forming Processes in Chernozems in Western Slovakia

Effect of Soil Chemical and Physical Properties on Cd Mobility Studied by Soil Thin-Layer Chromatography

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