The study of the use of Anodonta Cygnea oyster as an indicator of cadmium in anzali lagoon
Subject Areas :
farzin sayadghorbani shirin
1
(iran)
Keywords: Anzali Wetland, biological indecators, shell Anodonta Cygnea, cadmium metal,
Abstract :
Molluscs , especially bivalves because of benthos grabs and capability benthos. high ability to absorb organic matter and heavy metals in the soft tissues of your body as well as their gills. In many studies evaluating the distribution and concentration of heavy metals.analysis of the skin and soft tissue utilizes seashells.in this study , the concentration of cadmium in the soft tissue of mussels Anodonta Cygnea anzali wetland in the western part(of abkenar) was measured using atomic absorption.the results showed that the concentration of cadmium in the soft tissue of mussels average 0.15 µg/g dry weight.it also compares the findings with the standards EPA ,the average concentration in the Caspian sea , the earths crust , stream sediments and measured values in wetland sediments showed that the concentration of cadmium.in the soft tissue of mussels was below the standard.bioaccumulation factor for fish in the region less than 1 are obtained which indicates a lack of tissue accumulation of cadmium in high levels in oysters.given the small amounts of cadmium accumulation in the shellfish mainly due to the comparison with the calculated values in other studies. The western part of the lagoon that has been sampled at least pollution.it can be concluded that soft tissue of mussels Anodonta Cygnea.has the ability to reduce concentration of heavy elements and therefore it is not possible to monitor the concentration and distribution of heavy metals,especially cadmium used in the wetland
_||_