The Pb concentrations of atmospheric aerosol in the Chukchi Sea of the Arctic vary within the range of 0.167- 0.962 ng/m3, with an average of 0.532 ng/m3. These concentration values are 200 times higher than the natur...The Pb concentrations of atmospheric aerosol in the Chukchi Sea of the Arctic vary within the range of 0.167- 0.962 ng/m3, with an average of 0.532 ng/m3. These concentration values are 200 times higher than the natural background values of snow samples there. Calculation of the Pb enrichment factor of aerosol indicates that the ocean- and continent-source lead account for 9.23% and 0.01%, respectively, but industrially released Pb accounts for more than 90% of the atmospheric Pb. The Pb isotopic composition of aerosol has revealed that the sources of lead from industrial lead that causes pollution include mainly the western part of North America, East Europe and the former Soviet Union. The calculation of the total fallout flux of Pb indicates that the mean value of input flux into the Chukchi Sea is 0.02 mgm -2a -1,equivalent to that of southern Pacific but slightly lower than that of northern Indian Sea and southern Atlantic. It is evidenced that the Pb input flux into the Chukchi Sea is far lower than that off the Baltic Sea, the North Sea and the Mediterranean Sea.展开更多
The coal is contaminated with toxic metals at the trace levels. They are released into the environment during mining, handling and burning of coal. The Korba basin has one of the largest coal exploitation areas in the...The coal is contaminated with toxic metals at the trace levels. They are released into the environment during mining, handling and burning of coal. The Korba basin has one of the largest coal exploitation areas in the country. In this work, contamination and sources of toxic metals i.e. Hg and Pb in the air, soil and sediment of the Korba basin, India are described. The concentration of Hg and Pb in the ambient air was ranged from 7.4 - 29 and 7.0 - 585 ng/m3 with mean value of 18 ± 4 and 129 ± 104 ng/m3 in the winter season. The mean concentration of Hg in the soil and sediment was 0.22 ± 0.03 and 0.44 ± 0.08 mg/kg, respectively. The higher concentration of Pb in the environmental samples was observed.展开更多
文摘The Pb concentrations of atmospheric aerosol in the Chukchi Sea of the Arctic vary within the range of 0.167- 0.962 ng/m3, with an average of 0.532 ng/m3. These concentration values are 200 times higher than the natural background values of snow samples there. Calculation of the Pb enrichment factor of aerosol indicates that the ocean- and continent-source lead account for 9.23% and 0.01%, respectively, but industrially released Pb accounts for more than 90% of the atmospheric Pb. The Pb isotopic composition of aerosol has revealed that the sources of lead from industrial lead that causes pollution include mainly the western part of North America, East Europe and the former Soviet Union. The calculation of the total fallout flux of Pb indicates that the mean value of input flux into the Chukchi Sea is 0.02 mgm -2a -1,equivalent to that of southern Pacific but slightly lower than that of northern Indian Sea and southern Atlantic. It is evidenced that the Pb input flux into the Chukchi Sea is far lower than that off the Baltic Sea, the North Sea and the Mediterranean Sea.
文摘The coal is contaminated with toxic metals at the trace levels. They are released into the environment during mining, handling and burning of coal. The Korba basin has one of the largest coal exploitation areas in the country. In this work, contamination and sources of toxic metals i.e. Hg and Pb in the air, soil and sediment of the Korba basin, India are described. The concentration of Hg and Pb in the ambient air was ranged from 7.4 - 29 and 7.0 - 585 ng/m3 with mean value of 18 ± 4 and 129 ± 104 ng/m3 in the winter season. The mean concentration of Hg in the soil and sediment was 0.22 ± 0.03 and 0.44 ± 0.08 mg/kg, respectively. The higher concentration of Pb in the environmental samples was observed.
