. All the methods applied gave similar results. The highest deviation of the background was noted for Cu and the lowest for Zn. The lowest values of background were obtained for loess sediments and the highest in the case of the multiple 2r method.
Ambagarh tehsil, in Rajnandgaon, central India, is a heavily polluted area. In this work, contamination with As and other toxic elements (Cr, Mn, Cu, Zn and Pb) has been monitored in water, soil, plant leaves and animal stools. Mean concentrations of total As in surface water, groundwater, surface soil, plant leaf and animal stool samples of 0.031±0.005 mgꞏmL-1 , 0.360 ±0.050 mgꞏmL-1 , 192±28 mgꞏkg-1 , 5.6±1.4 mgꞏkg-1 and 51±7 mgꞏkg-1 , respectively, were found. The speciation, sources and toxicities of the As and other metals are discussed, together with some associated health hazards, exemplified in domestic animals exposed to the contaminated water and food.
Streszczenie
Odpady hutnicze zc względu na korzystne parametry techniczne są często wtórnie wykorzy- stywane w gospodarce, głównie do produkcji różnego rodzaju kruszyw. Wprowadzenie odpadów- hutniczych do środowiska determinuje konieczność poznania ich składu mincralogiczno-chcmicz- nego, na podstawie którego można ocenić zawartość w odpadach metali ciężkich, ich powiązania zc składnikami odpadów', a tym samym możliwości uwalniania i migracji metali do środowiska. W artykule scharakteryzowano skład mineralny i chemiczny zeszklonych odpadów' hutniczych po produkcji cynku i ołowiu zc starego zwałowiska w' Rudzic Śląskiej, odniesiono się również do wcześniej prowadzonych badań odpadów' stalowniczych. Stwierdzono, żc dominującym składnikiem odpadów- jest szkliwo, w otoczeniu którego występują wytrącenia metaliczne oraz drobne krystality faz krzemianowych. Stosunkowa niska zaw'artość metali ciężkich w' badanych odpadach w' połączeniu zc słabym ich zwietrzeniem (pomimo długoletniego składow'ania na zwałowisku), jak również nie- wielka wymywalność metali, stwarzają perspektywy wykorzystania badanych odpadów' hutniczych np. w drogownictwie jako jeden z kompozytów' do produkcji kruszyw'.
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/m 3 with mean value of 18 ± 4 and 129 ± 104 ng/m 3 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.
Abstract:The sulfide minerals from old mafic intrusion rocks from the Kola Peninsula were analyzed on stable sulfur isotopes. These samples were already dated by the Sm-Nd method. These sulfide samples were evaluated upon a geochemical composition by ICP-MS. The sulfide mineral samples were selected from the main ore-bearing rocks of the Monchetundra layered intrusion. The analyzed sulfides formed several generations of mineralization associated with primary and hydrothermal stage of formation of the deposits. Isotopic studies confirm a few consecutive stages of mineralization. These data were compared with the results of Sm-Nd dating of sulfide mineralization. The results of geochemical and geochronological studies indicate a complementarity in the context of determining the mineralization stages.
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