FACTORS OF ACCUMULATION AND DEPLETION OF HEAVY METALS AND METALLOIDS IN DANDELION LEAVES IN MOSCOW

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Abstract

The aim of the study is to evaluate the landscape and technogenic factors of the formation of biogeochemical anomalies of As, Cd, Cu, Fe, Mn, Mo, Pb, Sb and Zn in the leaves of dandelion (Taraxacum officinale). The plants of the municipal districts of Sokolinaya Gora, Perovo, Ivanovo, Novogireevo, Veshnyaki, Novokosino and Kosino-Ukhtomsky of the Eastern Administrative District of Moscow were studied. Concentrations of heavy metals and metalloids (HM) in washed plant samples were determined by atomic absorption method. The biogeochemical specialization of dandelion leaves in the city relatively to the background landscapes is following: Mo13,5Cd4,8Pb4,5Fe4,5As3,5Sb3,0Cu1,3. Technogenic and landscape factors of accumulation and depletion of HM in leaves are determined by tree-based models in the SPLUS software. The most significant factors are the physical and chemical properties of soils. However some other landscape factors could also influence, for example soil flooding for Pb, landscape and geochemical position for Mn, Fe. Technogenic factors that could influence on HM distribution are functional zoning (Cu, Cd, Zn), atmospheric deposition of HM - Fe, Cd, Mo, vehicle emissions - Pb, Fe.

About the authors

D V Vlasov

Lomonosov Moscow State University

Author for correspondence.
Email: vlasgeo@yandex.ru

Vlasov Dmitriy Valentinovich - Candidate of Geographical Sciences, Research Associate, Department of Geochemistry of Landscapes and Geography of Soils, Faculty of Geography, Lomonosov Moscow State University.

Leninskie Gory, 1, Moscow, Russia, 119991

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