深圳近岸养殖牡蛎体内污染物研究

2002年4月25日至8月22日对深圳近岸养殖牡蛎体内的污染物(Cu、Pb、Cd、Zn、Ni、总Cr、总Hg、无机As、石油烃)进行了调查,分析了上述污染物的含量和牡蛎对养殖水体中污染物的浓缩能力,并对其食用质量和养殖海域水体的使用功能进行了评价。结果表明:大亚湾牡蛎体内污染物水平较深圳湾和珠江口低,前者海域养殖牡蛎基本符合要求,只要采用相应的技术进行养殖后的净化处理,该海域养殖的牡蛎可安全食用,后者海域养殖牡蛎体内多项指标超过评价标准,食用质量较差。大亚湾海域可作Ⅰ、Ⅱ类功能使用,深圳湾和珠江口近岸海域作为Ⅲ类功能使用更为合理。牡蛎对污染物浓缩系数依次为Zu>Cu>Cd>Pb>总Cr>Ni>总Hg,其中Zn、Cu、Cd的浓缩系数远大于1000。

The pollutants within oyster cultured in the coastal zones of Shenzhen

The pollutants within Oyster cultured in the coastal water of Shenzhen, Cu、Pb、C、Zn、Ni、total Cr、total Hg、inorganic As and oil were determined from Apr.25th to Aug. 22th of 2002. The contents of pollutants and thebioconcentration ability Oysster on seawater pollutants were analyzed, and quality state of organisms and seawater wereevaluated. The results showed that the pollutants contents in Oyster in Daya Bay were lower than that collected in Shenzhen Bayand the Pearl river estuary.The samples of Daya Bay are eatable in case of adopting reasonable culturing depurative methods,while the samples of Shenzhen Bay and the Pearl river estuary were deeply effected by pollutant.The order of concentrationfactor within Oyster was Zn>Cu>Cd>Pb>total Cr>Ni>total Hg. The concentration factors of Zn、Cu、Cd were more higherthan 1000.