珠江河口区翡翠贻贝中有机氯农药和多氯联苯含量及分布

Concentrations and distribution of organochlorinated pesticides and PCBs in green lipped mussels, Perna viridis collected from the Pearl River Estuarine Zone

对分布于珠江河口区海域的翡翠贻贝有机氯农药和多氯联苯的含量进行测定 ,结果显示 :HCHs为ND— 1.1ng·g-1,DDTs为 9.5— 191ng·g-1,PCBs为 82 .8— 6 15 .1ng·g-1.尖沙嘴码头 (维多利亚港 )贻贝积累的PCBs浓度最高 ,珠江河口桂山岛和外伶仃岛的贻贝积累的DDTs和PCBs浓度较高 ,而荷包岛 (珠江河口西海区 )的贻贝则检出含量较高的HCHs和DDTs .贻贝选择性积累含 5— 6个氯原子数的PCB异构体 .

Concentrations of HCHs, DDTs and PCBs were determined in the green lipped mussels ( Perna viridis ), collected from thirteen sites along the Pearl River estuarine zone from July to August 1996. The ranges of HCHs, DDTs and PCBs in mussels were in the ranges of not-detected～1.1?ng g -1 ,9.5～191?ng g -1 and 82.8～615.1?ng g -1 (lipid weight basis) respectively. Relative high levels of DDTs and PCBs were found in mussels collected from the mouth of Pearl River. Mussels collected from Tsim Sha Tsui Pier (Victoria Harbour) showed the highest contamination of PCBs, while those collected from Hebao Island (Western estuarine zone) had the relative high contamination of DDTs and HCHs. Penta and hexa chlorinated PCB were selectively accumulated in Perna viridis . The isomeric composition analysis of residues in mussels from thirteen coastal locations indicated that there were two different PCBs pollution sources in the Pearl River Estuarine zone.