Mercury Fractions in Natural and Urban Soils of the Middle Amur, Far East Russia

Kot, Fyodor S.; Matyushkina, L. A.; Rapoport, V. L.; Dugina, I. O.

doi:10.1007/s00128-001-0091-1

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“…On the basis of Hg total content, the urban soils studied can be classified 31,32 2). However, Hg content in these soils is higher than the natural background for the element dispersion in the soils of the Middle Amur Lowlands, 20-100 ppb, 33 and higher than the Hg content found in Sweden and Canada forest soils of the pre-industrial period, v70 ppb. 32 High and very high Hg contents are found in a number of locations in Amursk.…”

Section: Resultsmentioning

confidence: 56%

“…Hg in H 2 O extracts turned out to be organically bound, it was detected only according to the Magos's procedure, 27 or after preliminary oxidation of the extract. H 2 O and EDTA solution are probably v70 Soils of the Middle Amur Lowlands 33 20-100 Average for soils 34 20-410 Dangerous level of soil Hg contamination 31,32,35,36 1000…”

Section: Extractable Hg Fractionsmentioning

confidence: 99%

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Distribution of mercury in chemical fractions of contaminated urban soils of Middle Amur, Russia

Kot

Matyushkina

2002

J. Environ. Monitor.

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The distribution of mercury (Hg) in fractions of urban soils from two industrial cities in the Russian Far East which are subject to varying degrees of Hg contamination was examined. The speciation scheme applied was based on routine chemical extraction methods used in soil investigations. Such an approach enables the Hg data to be brought into correlation with soil basic fractions and the fate of Hg bound to different soil components to be followed. Humic acids and a non-hydrolysable residue (humin), i.e. the soil fractions most refractory to microbiotic and chemical attack, were found to be principal Hg repositories in the soils studied. This pattern was equally observed for slightly, moderately and heavily contaminated soils. Hymatomelanic acids do not appear to be an efficient Hg concentrator. In heavily contaminated soils, Hg concentrations were evident in mobile fractions of fulvic acids as well as in those fractions extracted by H2O and 0.05 M Na2-EDTA pH 3. A portion of Hg extracted by 1 M HCl increased in lower horizons, reflecting relatively weakly bound Hg.

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Section: Resultsmentioning

confidence: 56%