TY - JOUR

T1 - Geochemical pollution of trace metals in permafrost-affected soil in the Russian Arctic marginal environment

AU - Ji, Xiaowen

AU - Abakumov, Evgeny

AU - Tomashunas, Vitaly

AU - Polyakov, Vyacheslav

AU - Kouzov, Sergey

PY - 2020/12

Y1 - 2020/12

N2 - The Arctic marginal environment has been considered as far from industrial areas and low population. During June–July of 2016 “Russian High Latitude” expedition, 93 samples of soil genetic horizon from 25 soil profiles dug till frozen ground were sampled from 8 islands and 2 capes of the Russian Arctic without direct anthropogenic influences. Nine trace metals (Pb, Cd, Cu, Ni, Co, Zn, Fe, Mn and Hg) were measured and quantified by energy-dispersive X-ray analysis for elemental concentrations. Through analysis of divided soil groups (Haplothels, Turbels, Historthels), the factors of organic matter and cryoturbation had a significant influence on metals’ distribution except for Fe and Mn. From summarized soil master horizons (O, A, B, C), Fe and Mn are abundant in all horizons suggesting as geochemical background values. Cu, Pb, Co and Ni are distributed specifically in different horizons with leaching and accumulation process, whereas Hg is evenly disturbed in all horizons. The correlation analysis reveals that distribution of most metals in present soils is highly depended on soil properties (pH, TOC, clay and silt). Li was selected as normalizing element for metals’ concentrations from mineral layers to establish geochemical baseline concentrations. The concentrations of trace metals have been assessed by geoaccumulation index (Igeo) and enrichment factor, showing only Co and Zn are moderately polluted and slightly polluted, and Co, Cu, Zn and Pb are enriched in topsoil. Other indices as modified degree of contamination (mCdegree) and pollution load index (PLI), mCdegree show moderate degree of pollution and PLI shows unpolluted to moderate pollution load. The ecological risk indices, e.g., ecological risk factor (Er) and potential ecological risk index, show low ecological risk potential.

AB - The Arctic marginal environment has been considered as far from industrial areas and low population. During June–July of 2016 “Russian High Latitude” expedition, 93 samples of soil genetic horizon from 25 soil profiles dug till frozen ground were sampled from 8 islands and 2 capes of the Russian Arctic without direct anthropogenic influences. Nine trace metals (Pb, Cd, Cu, Ni, Co, Zn, Fe, Mn and Hg) were measured and quantified by energy-dispersive X-ray analysis for elemental concentrations. Through analysis of divided soil groups (Haplothels, Turbels, Historthels), the factors of organic matter and cryoturbation had a significant influence on metals’ distribution except for Fe and Mn. From summarized soil master horizons (O, A, B, C), Fe and Mn are abundant in all horizons suggesting as geochemical background values. Cu, Pb, Co and Ni are distributed specifically in different horizons with leaching and accumulation process, whereas Hg is evenly disturbed in all horizons. The correlation analysis reveals that distribution of most metals in present soils is highly depended on soil properties (pH, TOC, clay and silt). Li was selected as normalizing element for metals’ concentrations from mineral layers to establish geochemical baseline concentrations. The concentrations of trace metals have been assessed by geoaccumulation index (Igeo) and enrichment factor, showing only Co and Zn are moderately polluted and slightly polluted, and Co, Cu, Zn and Pb are enriched in topsoil. Other indices as modified degree of contamination (mCdegree) and pollution load index (PLI), mCdegree show moderate degree of pollution and PLI shows unpolluted to moderate pollution load. The ecological risk indices, e.g., ecological risk factor (Er) and potential ecological risk index, show low ecological risk potential.

KW - Arctic

KW - Ecological risk

KW - Permafrost

KW - Soil pollution

KW - Trace metals

KW - HEAVY-METALS

KW - THERMAL STATE

KW - SEDIMENTS

KW - ORGANIC-MATTER

KW - CLIMATE-CHANGE

KW - 0-5 CM

KW - CONTAMINATION

KW - CATCHMENTS

KW - ELEMENTS

KW - KOLA-PENINSULA

UR - http://www.scopus.com/inward/record.url?scp=85083983428&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/fc3415ed-0a39-3f9e-bad1-651b5fa3aa2e/

U2 - 10.1007/s10653-020-00587-2

DO - 10.1007/s10653-020-00587-2

M3 - Article

AN - SCOPUS:85083983428

VL - 42

SP - 4407

EP - 4429

JO - Environmental Geochemistry and Health

JF - Environmental Geochemistry and Health

SN - 0269-4042

IS - 12

ER -