the bioavailability of trace metals, their biological uptake and ecotoxiccological effect on soil biota can be better understood in terms of their chemical fractionation. the present study examined the mobility and availability of cd, cu, ni, pb and zn in sewage water – irrigated soils using sequential extraction technique as a basis for predicting metal uptake by plants. the residual fraction ...

There is an increasing requirement for assessment of the bioavailable metal fraction and the mobility of trace elements in soils upon disposal. One of the approaches is the use of leaching procedures, but the results obtained are operationally defined; therefore, their significance is highly dependent on the extraction protocol performed. So, for this type of study, there is a need for referenc...

background and aims: giardia lamblia infection is a common cause of food and water-borne diarrhea in non-sanitary communities. infections are common in children, particularly in child-care centers, backpackers, travelers, and homosexuals. zinc is necessary for the immune system functions. zinc deficiency is associated with acute diarrhea. copper is essential for the production of red blood cell...

abstract  background: pixe (particle induced x-ray emission) is a suitable method for the analysis of biological samples in which heavy trace elements are contained in light matrix elements. it is very important to know which factors or probably elements act as initial seed and lead to growing the sands. the goal of this study was to compare the relative values of fe/k, cu/k and zn/k for gallst...

With the objective of increasing information inorganic pollutants in urban soils Spain, we studied presence Cu, Pb, Zn, Ni, Cr, and As 55 city Santiago de Compostela (northwestern Spain). The were developed over diverse parent materials (granites, gneiss, schists, amphibolites) present different land uses, grasslands, forests, allotment gardens, peri-urban agricultural soils. Total trace elemen...

The contamination status of the soils from Hrazdan, Gavar, and Martuni regions has been investigated by comparing UTEs indicators with % humus pH in soil samples during different seasonal intervals steppe chernozem type was studied. It found that maximum exceeded minimum almost twice samples. were to be neutral terms character. results for Hrazdan region show on 10% increase barium content 70% ...