[PDF]     http://dx.doi.org/10.3952/lithjphys.51413

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 51, 359–369 (2011)

K. Kvietkus, J. Šakalys, and D. Valiulis
State Research Institute Center for Physical Sciences and Technology, Savanorių 231, LT-02300 Vilnius, Lithuania
E-mail: kvietkus@ktl.mii.lt

Received 28 July 2011; revised 28 November 2011; accepted 1 December 2011

The results of long-term measurements of heavy metal (Pb, Zn, Cr, Ni, Cu, Mn, Cd, Fe, As, Hg) concentrations carried out at the Aukštaitija and Žemaitija integrated monitoring stations (IMS) are presented in this work. The average annual concentrations of heavy metals in the air in 2007–2008 and in precipitation over the period 2006–2010 are analysed. A higher deposited amount of heavy metals on the Earth’s surface was determined in the western part of Lithuania (Žemaitija IMS) compared with the eastern part of Lithuania (Aukštaitija IMS). Different deposited amounts of heavy metals are related to higher concentration of heavy metals in the air and higher amounts of precipitation in the western part of Lithuania. A decreasing trend of Pb concentration in precipitation and an increasing trend for Cr, Ni and Cu in precipitation and deposited amounts were observed at both stations. Common correlating groups of element concentrations for both stations were established: As–Cd, Ni–Cr–Cu, and Mn–Cu. These groups are probably typical of the entire territory of Lithuania and are caused by long-range transfer of air masses.
Keywords: heavy metals, concentration, air, precipitation, deposition, trend
PACS: 92.60.Sz, 92.60.Fm, 92.60.Jq, 92.70.Cr

K. Kvietkus, J. Šakalys, D. Valiulis
Fizinių ir technologijos mokslų centras, Vilnius, Lietuva

Pateikti ilgalaikių sunkiųjų metalų (Pb, Zn, Cr, Ni, Cu, Mn, Cd, Fe, As, Hg) koncentracijų matavimų Aukštaitijos ir Žemaitijos integruoto monitoringo stotyse (IMS) rezultatai. Vidutinės metinės sunkiųjų metalų koncentracijos ore ir krituliuose eigos analizė pateikta 2006–2010 metams. Vakarinėje Lietuvos dalyje nustatyta didesnė žemės paviršiaus apkrova sunkiaisiais metalais negu rytinėje dalyje. Tikriausiai šis paviršiaus apkrovos skirtumas susidarė dėl didesnės sunkiųjų metalų koncentracijos ore ir didesnio kritulių kiekio vakarinėje Lietuvos dalyje. Stebėta Pb koncentracijos krituliuose mažėjimo tendencija abiejose IMS bei Cr, Ni ir Cu koncentracijos krituliuose ir iškritose į žemės paviršių didėjimo tendencija abiejose stotyse. Nustatytos bendros koreliuojančių metalų As–Cd, Ni–Cr–Cu ir Mn–Cu koncentracijų grupės abiems stotims. Tikimiausia, kad šios grupės yra būdingos visai Lietuvos teritorijai ir yra nulemtos tolimosios oro masių pernašos.

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