نتایج جستجو برای: contamination factor and geo
تعداد نتایج: 16949835 فیلتر نتایج به سال:
background and purpose: in the environment, heavy metals in high concentration are toxic to most organisms. human activities have continuously increased the concentration of these metals in the environment such as soils. in the present study, soil samples collected from ahvaz iv industrial estate in khuzestan province. materials and methods: the soil samples were taken from 9 stations in 4 card...
Recent decades have witnessed a danger to food security as well human health because of pollutants’ negative impact on crop quality. An accurate estimate the heavy metal concentrations in Egypt’s north Nile Delta is required lower high concentration levels soil means develop remediation strategy that stabilizes metals contaminated soil. Using geo-accumulation index (I-geo), contamination factor...
pollution of water and soils by heavy metals is an emerging problem in industrialized countries.the present study was conducted to investigate the heavy metals concentration in water and sedimentsamples from ship breaking sites of sitakunda to assess the potential ecological risk posed by heavy metalusing different methods. heavy metals concentration was analyzed by atomic absorption spectrosco...
The "Agios Philippos" mine in the Kirki region (NE Greece) has been abandoned in 1998 after half a century of ore exploration without a reclamation or remediation plan. This article aims at elucidating the potential environmental risks associated with this site by quantifying pollution in tailing basins, stream waters, stream sediments and agricultural fields. Concentrations of heavy metals in ...
Abstract: One of the most important geo-political variables influencing the country's fate is the energy variable and one of the ways that Iran can increase its national security factor is to pay attention to foreign policy based on security and transit of energy (oil and gas). In the new geo-economic territories, Iran plays a vital role in the Middle East region in general and in the Persian...
Recently, due to rapid industrialization and urbanization, many studies have focused on the assessment of soil metal contamination. The present research aimed investigate concentration potentially hazardous elements (Al, Cr, Cu, Fe, Mg, Mn, Ni, Pb, V Zn) in three different areas (forest, wildfire forest urban) Mediterranean region. Contamination levels were further assessed calculating indices:...
the ability of composing a coherent and extended piece of writing in second language is considered as a fundamental factor to convey information and ideas of learners through the academic issues. although learners may achieve a perfect academic writing skill through assigning the l2 tasks in content based instruction, but demonstration of their abilities may be related to their ability in l1 es...
after the collapse of the soviet :union: and the formation of a new world order, the nature of power changed from exclusively military to a combination of military, economic and political one; and consequently the new discourse of geo-economics emerged alongside the geo-politics. since then, most countries have tried to maximize their relative power positions in the international system by emph...
the major purpose of this study was to develop the translation teacher competency test (ttct) and examine its construct and predictive validity. the present study was conducted in two phases: a qualitative phase as well as a quantitative phase. in the first phase of the study, the author attempted to find out the major areas of competency required for an academic translation teacher. the second...
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