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廣東近海污染_生蠔銅超標740倍 @ 2011-10-04T06: Back Hot News
Keyword:超標 珠江
Concept:
2010年廣東海洋公報顯示,廣東近4成入海排污口排放污水超標,廣東16%近海海域遭受污染;珠江8大入海口和榕江等主要入海河流攜帶入海的重金屬污染物108萬噸,其中珠江排入海的污染物占總量7成。
《羊城晚報》引述內地專家表示,珠江口海域的污染嚴重,海產受到不同程度的重金屬污染,甲殼、雙殼、魚類等污染程度嚴重,其中生蠔內含的銅及鎘元素,平均超標740和90倍,部份魚類的含鉛量,亦超標約50倍,建議民眾日常食用貝類海鮮時要改變習慣以保安全。
廣東省化學危害應急檢測技術重點實驗室副研究員郭鵬然博士指出,重金屬容易富集在海洋生物體的腎、肝髒、性腺、鰓中,如市民經常食用的生蠔中,銅元素和鎘元素分別超標740倍和90倍,「現有大量研究表明,珠江口水體和沉積物中很多重金屬和持久性有機污染物含量超標。這些污染物會在水體生物,如魚類、浮游動物等體內積累,並且對它們產生毒性危害風險,更為嚴重的是通過食物鏈將毒性放大,危害人體健康」。

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