The Study of the Heavy Metals Concentration (As, Cd, Cr, Hg, Ni, Pb) in Edible Bivalves Mollusks in Coastal Area of Leam Klat, Mueang District, Trat Province

Abstract

The six species of edible mollusks living in the coastal area of Leam Klat, Mueang District, Trat Province, including Meretrix casta, Meretrix meretrix, Solen grandis, Solen regularis, Solen strictus, Pseudodon sp., were examined to evaluate for the concentration of heavy metals (As, Cd, Cr, Hg, Ni, Pb). These samples were collected at the lowest sea levels during the rainy season from July to September in 2012. The highest concentration level recorded where of Arsenic (As), on average were found within the tissue at 0.04037 milligrams/kilogram and It was found that 0.00427 milligrams/liter of water in the mollusk Pseudodon sp. Six bivalves recorded in the present study had heavy metal concentrated within their tissues not exceed the present environmental safety standards. The mollusks from coastal region of Leam Klat are safely for feeding. Therefore, they are edible and have no harm after human consumption.