Contents, distribution, and fractionation of soil organic carbon and trace elements in soils under a green manure application

We quantified the soluble fractions of the soil organic carbon (SOC) concentrations and the total and water-soluble trace elements in soils contaminated by household waste and remediated via the addition of green manure over 13 years and identified the main factors controlling the vertical distribut...

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Bibliographic Details
Published in:Soil and water research 2021-01, Vol.16 (1), p.50-58
Main Authors: Timofeeva, Yana, Purtova, Lyudmila, Emelyanov, Alexey, Burdukovskii, Maxim, Kiseleva, Irina, Sidorenko, Marina
Format: Article
Language:English
Subjects:
Aluminum
anthrosols
contamination of soils
Copper
element-pollutants
Fractionation
fulvic acids
Household wastes
Humic acids
Humic substances
Humification
Ions
Iron
Lead
Manganese
Manures
Nickel
organic amendment
Organic carbon
Organic matter
Organic soils
Silicon compounds
Soil contamination
Soil formation
Soil organic matter
Soil pollution
Soil remediation
Soil stabilization
Soil water
Soils
Trace elements
Vertical distribution
Water chemistry
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Summary:We quantified the soluble fractions of the soil organic carbon (SOC) concentrations and the total and water-soluble trace elements in soils contaminated by household waste and remediated via the addition of green manure over 13 years and identified the main factors controlling the vertical distribution and accumulation of the trace elements. Green manure favoured the active formation of soil organic matter. The SOC of the examined soils was characterised by the active stabilisation by mineral soil compounds, but by a low degree of humification. The soils showed increased concentrations of Cr and Ni ions. The SOC and different soil compounds enriched by Si, Ca, and Mn ions were the important determinant for the distribution of Sr, V and Cu ions, as well as for the distribution of Pb and Cr ions bound to the water-soluble components of the soils. The low degree of SOC humification may be one of the main reasons of the high concentrations of Cu and Pb ions in the composition of the water-soluble soil compounds. The nickel ions were mainly associated with compounds enriched by the Al and Fe ions. The extremely high percentage concentration of the Ni ions in the water-soluble components of the soils may be result of the absence of the Ni ions adsorption by humic substances.
ISSN:1801-5395
1805-9384
DOI:10.17221/65/2020-SWR