Heavy Metals Accumulation in Water Sediment Green-Lipped Mussels (perna viridis Linneaus) and Cockle (Arca granulosa Linneaus) near Seashore at Bang Khun Thian District
Abstract:
This thesis studied the accumulation of 8 heavy metals (Pb, Cr, Cd, Zn, Cu, Ni, Fe and Al) in water, sediment, green-lipped mussel (perna viridis Linneaus) and Cockle (Arca granulosa Linneaus) inone of the main canal and seashore at Bang Khun Thian district during April 2001 to March 2002.Water samples were collected at 0.3 of the depth. Heavy metals in sediment were analysed fromsediment particles < 63 ?m. Green-lipped mussels were collected from three level (top, medium,and bottom) of the culture stick. Cockles were collected from the surface in the sediment. It wasfound that the levels of Fe, Zn, Cd and Cr were 60, 3, 2 and 1.5 times above than standard level forcoastal water type four of the Pollution Control Department, Thailand. Statistical analysis foundcorrelations between: Cr (water-sediment), Cd (water-green-lipped mussel) and Ni (green-lippedmussel-sediment), respectively, at 95% significant level. Physical, chemical and biological waterqualities were suitable for culture of green-lipped mussels and cockles. Since, levels of Crconcentrations in water, cockles and green-lipped mussels were higher than safety standards above,countermeasures should be practiced in this area to ensure public safety.