نتایج جستجو برای: heavy metals accumulation
تعداد نتایج: 311708 فیلتر نتایج به سال:
Background: A pot experiment was conducted to determine the toxic effects of some heavy metals on the plant growth and seed yield of maize (Zea mays L.). Materials and Metheds: Heavy metals Mn, Pb, Cd, Cr and Co individually and in combinations were added as chloride salts in solutions to the pots before sowing. The test plants for were harvested after 80 days of germination and evaluated f...
Heavy metals contamination of soil is a widespread global problem. One approach to reduce the accumulation of heavy metals in plants is using of different growing substrates. In order to investigate of different combinations substrate and heavy metals effect on physiological and biochemical traits in bean) cv. Sadri), an experiment was conducted. The first factor included four salt of heavy met...
The major objective of this study was to investigate heavy metal content of black pomfret (Parastromateus niger ). The concentrations of Zn, Cu, As and Cd were determined in external (gill and shell) and internal organs (muscle and liver) of black pomfret in northwest of Persian Gulf in summer 2013. A total of 60 specimens were collected from fishing bottom trawlers. Concentrations of these hea...
Concentrations of Ni, V, Pb and Cu were determined in bottom sediments and liver, gills and fillet of Euryglossa orientalis and Chirocentrus nudus along the Bahrekan Bay in the Northwest part of the Persian Gulf in Iran. Sediment samples and fish species were collected during winter 2013 and spring 2014. Heavy metal analysis was performed by atomic absorption spectrophotometer. Results showed t...
Introduction: Today ascertaining the healthiness of rice and providing healthy rice seeds are of prime importance. In these days we need to know about food health and establish a safe system of production. But unfortunately, wrong agricultural practices yield undesirable results. Therefore, this study aimed to investigate the amount of rice contamination in the main samples and ratoon. Materia...
The accumulation and transfer of Pb, Zn, Cu, and Cd along a soil-plant-insect-chicken food chain at contaminated sites were investigated. The study site nearing the Pb/Zn mine had been contaminated by heavy metals severely. Cadmium and Pb concentrations steadily declined with increasing trophic level (p < 0.01), but concentrations of Zn and Cu slightly increased from plant to insect larva (p > ...
Several electroplating industry including agricultural sector industries, sewage treatment and mining operations all combine to generate hazardous waste water containing enormous amounts of toxic heavy metals. The accumulation of toxic heavy metals in human beings and animals cause many metabolic disorders. Heavy metal concentration was estimated in sewage, sludge and electroplating wastewater ...
Certain heavy metals such as mercury, lead, arsenic and cadmium are toxic even in reduced concentrations in blood. Their accumulation in the body causes serious illnesses. The most important heavy metals in human pathology are: mercury (Hg), cadmium (Cd), arsenic (As) and lead (Pb). The author mentions the heavy metal sources of poisoning, their toxicokinetics and toxicodynamics, clinical featu...
Geogenic, as well as anthropogenic heavy metals from distant sources, gradually increase the level of toxic metals in natural environments and these will be increasingly taken up by the plants and transferred further up the food chain. The level of different heavy metals (Hg, Cd, Pb) was studied in the producers (food plants) and consumers [four species of acridid grasshoppers: Calliptamus ital...
Treatment of soils contaminated with heavy metals using plant species is a method which has been widely used in thepast. This method, which is known as phytoremediation, has been applied for pollution treatment using different plantspecies worldwide. The method has been used for remediation of various types of pollutants in laboratory, pilot andindustrial scales. The aim of this study was to co...
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