Abstract:
To understand the pollution status and the health risk level of heavy metals in shellfishes, six typical species of shellfishes were collected from Dongshan Bay, Fujian Province in November of 2016, including Chlamys nobills, Ruditapes philippinarum, Haliotis sp., Paphia sp., Saccostrea sp. and Perna viridis. Pollution index of heavy metals in these shellfishes and the related dietary exposure and human health risk were all evaluated. The results indicated that the mean content of copper (Cu), zinc (Zn), lead (Pb), cadmium (Pb), chromium (Cr), arsenic (As) and mercury (Hg) in these shellfishes were 9.69, 0.19, 43.5, 0.65, 0.21, 0.010 and 1.69 μg·L-1, respectively. Compared to the standard limits for the primary category of marine life quality, the excess rates of Cu, Pb, Zn, Cd, Cr and As were 16.7%, 83.3%, 33.3%, 33.3%, 16.7% and 100%, respectively. However, in terms of meeting the allowable standard limits for pollutants in food, except Cd in Chlamys nobills exceeding the recommended value, all the other heavy metals including Pb, Cr, Hg and As met the standards. In addition, the average contents of six heavy metals in shellfish from Dongshan Bay were slightly lower than those from the eastern and southern coastal areas of China, and the pollution index of heavy metals in oysters did not change significantly from 2010 to 2017 (quality index of aquaculture organism was less than 5%). After calculation, the total carcinogenic risk of shellfish in Dongshan Bay was Rc = 1.65×10-4, the total noncarcinogenic risk was Rn=0.94, and the risk of heavy metals in diet exposure was lower. Therefore, although the health risk can not be excluded, the general quality of shellfishes in Dongshan Bay was still acceptable.
点击查看大图
下载:
