نتایج جستجو برای: heavy metals concentration
تعداد نتایج: 536742 فیلتر نتایج به سال:
The concentration of five soil heavy metals (Pb, Co, Cr, Cu, Hg) was measured in forty sampling sites in central Transylvania, Romania, regions known as centres of pollution due to the chemical and metallurgical activities. The soil samples were collected from locations where the ground is not sliding and the probability of alluvial deposits is small. The concentration of heavy metals was measu...
Background: In the current study,the hazard quotient, the hazard index (HI) and spatial variations of Fe,Mn,Cu and Cr in drinking water sources of Andimesk-Shush, Khuzestan Province, Southern Iranaquifer were assessed. Methods: We compared theconcentrations of aforementioned heavy metals in wells and springs inAndimeshk and Shush regions. The non-carcinogenic risk assessment of heavy metals ...
--This study is an attempt to stabilize the heavy metals present in the municipal solid waste. A hydrothermal processing system was setup with a mixture of ferric sulphate. Experimental results showed the reduction in the heavy metals concentration in the municipal solid waste ash after the treatment with iron oxides. Initial values of Cg, Cu, Pb, Cr, Hg was 0.001 mg/L , 4.322 mg/L , 0.578 mg/L...
Evaluation of Heavy Metals Resistance in Biofilm Cells of Native Rhodococcus spp. Isolated from Soil
Background & Aims of the Study: Rhodococci according to possess large genome, their active metabolism and survival under extreme conditions, are highly regarded for biodegradation and bioremediation of different pollutants especially heavy metals in the environment. Biofilms are more resistant to heavy metals than free-swimming organisms. The aim of this study was biofilm forma...
Background and Objective: Urban and industrial development has increased concentration of heavy metals in the environment. The goal of this study was to assess the impact of Kerman steel complex on their surrounding soil by heavy metals. Materials and Methods: This study was a snapshot and its type was descriptive-analytical research. Heavy metals contents from 60 soil samples (top soil, 0-1...
Phaseolus vulgaris L. plants were grown in soil supplemented with different Pb and Cd concentrations (2, 4, 6, 8 gKg for Lead and 1.5, 2.0, 2.5, 3.0 gKg for Cadmium). Germination % was remained unaffected at low concentration of both metals as compared to control plants but at higher concentration of Cd i.e. 3g/Kg soil, germination was completely inhibited. Growth was also decreased as concentr...
concentration of heavy metals in aquatic ecosystems is considered as an important environmantal issue. in this study, the namrood river located in firoozkooh (tehran province, iran) was assessed for the existence of heavy metals. the namrood river is situated by the main road being by pollutants from tourism and recreational centers, gas stations, sewage of villages, agricultural wastewater and...
background: heavy metals tend to bioaccumulate in living organisms, and their accumulation has been a major concern. as mammals are known to excrete heavy metals via their bile, it seems to be very promising to analyse metal burdens of par-asites that infect the biliary tree such as liver flukes of the genus fasciola . the pre-sent study was carried out to evaluate f. hepatica and f. gigantica ...
The purpose of this research was to study the effects kerosene by a factorial experiment in the nested design in three replications. The factors included region (Shush, Dezful and Bavi), plant (parsley, dill, coriander and carrot), and management practice (control, contaminated field with kerosene 1, contaminated field with kerosene 2). Heavy metals concentration (Pb, Zn, Cu and Cd) was measure...
Abstract Background and purpose: Heavy metals are the most important contaminants that enter the sea through rivers and shore zones and aggregate in the aquatic body through food chain. The purpose of this study was to compare the concentration of heavy metals (cadmium, copper, zinc, lead, and nickel) in the muscle tissue of Banana shrimp as the most abundant used species in Bandar Abbas, an...
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