Study of the spatial distribution of natural radioactivity in the upper Egypt Nile River sediments

Magnetic, chemical and radionuclide studies of river sediments and their variation with different physiographic regions of Bharathapuzha river, southwestern India

“…Land environments suffer a major impact because hazardous components are transferred to the Earth's surface, made available, and taken-up by organisms or incorporated into sediments. Thus, the knowledge and detailed understanding of the various types of these components are essential to humans in monitoring the environmental changes by natural background radiation (radioactive elements) and anthropogenic activities emitting particulate matter, heavy metals, and persistent organic pollutants (El-Bahi, 2004;El-Gamal et al, 2007;Evans and Heller, 2003). Trace elements (as toxic metals) are introduced into agricultural soils by cultivation practices such as fertilisation, irrigation, pesticide application and organic waste disposal (Chen et al, 2007, Chauhan et al, 2013.…”

Radiological risk analysis of sediment from Kutubdia island, Bangladesh due to natural and anthropogenic radionuclides

“…In the present study the average activity concentrations of 238 U, 232 Th were less than the value of the world averages wherein 40 K was greater than that. The increasing trend of 40 K might be due to the presence of loamy and clay sediments (16) and due to the high content of monazite (17) . From the previous work on coastal area (18)(19)(20) we can conclude that the concentrations of natural radionuclides in these samples are lower than the any other coastal area of the country.…”

Magnetic Susceptibility and Radiological Hazardous Nature of the River Sediments - Spectroscopical Approach

“…The highest concentration of 232 Th and 40 K are observed in site number S 40 , whereas their lowest concentrations are found in site number S 3 and S 1 , respectively. El--Gamal et al [9] have reported of the activity concentration of radionuclides for the Nile river sediments. They stated that high concentration of 232 Th and 40 K of river sediment are related to clay content, while the lower concentration of radionuclides are related to sandy content.…”

“…The environmental uranium and partial thorium concentrations are increased due to the fertilizers. Usually fertilizers are considered as technologically enhanced natural radiation [9]. Considerable amounts of natural radio nuclides are found in river sediments as the end result of fertilizer washing and industrial activities [8].…”

“…Especially, Chaparro et al, [12,13] proved that magnetic susceptibility is able to reflect anthropogenic input into river sediments. Radioactivity of river sediments was measured by many authors [8,9,[16][17][18]. The infrared spectra of river sediments from Cauvery and Vellar have been characterized by Ramasamy et al, [19,20].…”