In the present study it was observed that Pb, Zn, Cd and As are still at elevated concentrations in environment of upper Meža Valley. particular, Pb indicate possible new sources have emerged. The main objective this to determine isotope composition both water sediments (fractions < 0.150 <0.063 mm) from River its tributaries for first time then use them as identifiers pollution sources. ...

The evaluation of potential ecological risk aquatic sediments associated with the presence potentially toxic elements (PTE) determines its degree danger on native biota. In this work, V, Ti, Cr, Ni, Cu, Zn, As, Se, Cd, Sn, Hg and Pb in superficial is explained three different areas Lake Maracaibo: El Tablazo Bay, Strait Maracaibo lake itself, through a multi-guideline approach (elemental enrich...

Nature is full of various nanomaterials and nanostructures that have inspired helped human life civilization in the advancement science technology. Among these materials are clays, which abundantly found rocks earth structures. The mineral montmorillonite, known as a clay nanoparticle, major phase bentonite. This nanoclay, with thickness about 10 angstroms, includes unique properties such expan...

objective high concentration of iron and other trace elements could restrict bacterial growth and modify their metabolic pattern as well. however, this study aimed to find out the influence of iron, chromium, cadmium and synergism or antagonism between these elements on the growth of a gram positive bacterium. materials and methods in a series of experiments, bucillus cereus was cultured in a n...