نتایج جستجو برای: and heavy metals
تعداد نتایج: 16858155 فیلتر نتایج به سال:
background: various chemicals are used to produce polymers ,leakage of polymer materials over the time , can cause health problems the aim of this research was to evaluate the leakage of heavy metals from the pvc and polypropylene pipes used in the water distribution system in isfahan. methods: four brands of pp pipes and two various types of pvc pipes were analyzed in this study. concentration...
in order to prevent contamination of heavy metals accumlation in soil, plant, and ground water, several methods of prevention are studied, and tested worldwide. one of the method which has not been studied and applied in iran is stabilization of heavy metals in soil by using clay minerals. clay minerals due to hydration properties can adsorb organic and inorganic substances. two clay minerals w...
Heavy metals are normally found in soils. Industrialization and urbanization have increased the anthropogenic contribution of heavy metals in biosphere. Phytoremediation is an important technology for remedying contaminated sites. In this work, we studied the capability of stability, growth, and uptake of heavy metals by means of Thlaspi caerulescen, Zea mays, Helianthus annuus, Eruca sativa, ...
Dusts contain heavy metals such as Pb, Zn, Cu, Cr, Cd and As that can threat humanchr('39')s health and environment. Therefore, the spatial distribution of heavy metals concentration and soil pollution monitoring and environmental quality protection seem to be essential. To assess heavy metals pollution level in Ahvaz street dust, 115 street dust samples were collected from main pedestrians. Th...
Background & Aims of the Study: Heavy metals are ubiquitous in the environment, as a result of both natural and anthropogenic activities, and humans are exposed to them through various pathways, especially food chain. So, this study aimed to assess heavy metals (Cu, Pb and Zn) concentrations in different parts of the leek vegetable in Hamedan Province, Iran. Materia...
this study was mainly designed to investigate and identify the amounts and types of heavy metals in the soils of national iranian oil refining & distribution company in shahrood region and tried to establish a logical relation between the presence of heavy metals and their damage on vegetation. in addition, considering the power of drained soil and due to the proximity of ground water in shahro...
Introduction: Bioaccumulation Capacity of Heavy metals in aquatic bodies can do a serious threat to food security and public health. Therefore, in this study, the amount of lead, cadmium and copper in edible tissues of hydrothermal fish in Alborz province was determined in 2017. Materials and Methods: Twenty-one carp fish of three species were randomly selected from the Mahmoudi fishery, which ...
Background and Objective: Heavy metals contamination, particularly in aquatic environments, is an important concern. Since Mahbad river is the source for supplying drinking water to the city and the dam established on it is used for catching fish and sale in the market, heavy metals concentrations in the sediments of Mahabad River and the Dam, and the possible health risk of the fish consumpti...
this study examines the transport of seventeen heavy metals between the isipingo estuary andthe adjacent sea. results demonstrate variability of fluxes in terms of prevalence, concentration and seasonality.summer neap and spring tides had approximately twice the number of heavy metals compared to winter andspring seasons. spring and winter seasons yielded higher concentrations and a greater num...
Background and Objective: The aim of the present study was to investigate the concentration, enrichment factor, Nemrow integrated pollution index, and potential ecological risk of heavy metals including (Pb, Ni, Cu, Zn, Cd, V and Cr) in surface soils of Ahvaz oil filed. Materials and Methods: For this purpose, 49 soil samples with a systematic scheme from Ahvaz oil field were analyzed by atomi...
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