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Sadasivan, S.; Jha, S. K.
International Atomic Energy Agency, Viena (Austria); Centro de Estudios Aplicados al Desarrollo Nuclear, La Habana (Cuba); Agencia de Energia Nuclear, La Habana (Cuba); Instituto Superior de Ciencia y Tecnologia Nuclear, La Habana (Cuba); Centro de Informacion de la Energia Nuclear, La Habana (Cuba); Centro de Tecnologia Nuclear, La Habana (Cuba); Instituto de Investigaciones Fundamentales de la Agricultura Tropical, La Habana (Cuba)2001
International Atomic Energy Agency, Viena (Austria); Centro de Estudios Aplicados al Desarrollo Nuclear, La Habana (Cuba); Agencia de Energia Nuclear, La Habana (Cuba); Instituto Superior de Ciencia y Tecnologia Nuclear, La Habana (Cuba); Centro de Informacion de la Energia Nuclear, La Habana (Cuba); Centro de Tecnologia Nuclear, La Habana (Cuba); Instituto de Investigaciones Fundamentales de la Agricultura Tropical, La Habana (Cuba)2001
AbstractAbstract
[en] The trace element concentrations in sediments have been used as indicators for the History of metal pollution in many areas as the sediment is considered to be major sink for chemical components of the water bodies. Such studies are useful to estimate the impact of a particular industrial activity on water and also provide guidelines for planned development. Remote regions where pollution and impact of industrialization is Negligible are considered as representative of pristine environment. Crescent shaped Nainital lake which is a tectonically formed sub-tropical and eutrophic lake situated at an Altitude of about 1937 meters above mean sea level (latitude 29o24'n and Longitude 79o23'e) in Nainital district of Kumaun Himalayas was considered as study area. The Average depth of lake is 18.5m spread over an area of 4,65,000m2 with a maximum depth Of 27.3m. The catchment area of lake is 4.9km2. The concentration and distribution of the Toxic and trace elements As, Ba, Br, Co, Cr, Cs, Fe, Ga, K, Mn, Na, Rb, Sc, Sr, Th and Zn were investigated in dated sediment cores of Nainital lake which is considered as a Remote background area. The concentration of elements in the core section was measured By Instrumental Neutron Activation Analysis using K*0 method. Its main advantage is the Combination of high sensitivity and accuracy of the results. The lake sediment standard S L-3 of IAEA was used as the standard. The normalized data for a series of elements Were used to understand the source of loading. The elements like Br, Co, Cr, Fe, K, Mn And Zn show a negative correlation with depth, whereas elements like As, Ba, Cs, Na and Rb show a positive correlation. Assuming the concentration for the bottom segments as Close to the base line concentration, recent flux for different elements was calculated. An Increase in the flux value was observed in the case of Br, Cr, Fe, K, Mn and Zn, which Can be attributed to anthropogenic contribution in the recent years
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2001; 1 p; 3. NURT 2001; La Habana (Cuba); 22-26 Oct 2001; Available from Centro de Gestion de la Informacion y Desarrollo de la Energia (Cubaenergia) calle 20 No 4111 esquina 47, Playa, La Habana, Cuba. e-mail: belkis@cien.energia.inf.cu; raida@cien.energia.inf.cu; katia@cien.energia.inf.cu; Published only in CD-ROM
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Multimedia
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Conference
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