| 桑沟湾贝类养殖海域石油烃污染状况及其对贝类质量安全的影响 |
| 摘要点击 2386 全文点击 1890 投稿时间：2010-09-02 修订日期：2010-11-15 |
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| 中文关键词 桑沟湾 石油烃 污染评价 相关性 贝类质量安全 |
| 英文关键词 Sanggou Bay petroleum hydrocarbon pollution evaluation correlation shellfish quality safety |
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| 中文摘要 |
| 2008年1～11月在桑沟湾贝类养殖海域分别采集表层海水、表层沉积物和养殖贝类样品，进行了石油烃含量分析．依据石油烃含量检测结果，分析了桑沟湾贝类养殖海域海水和沉积物中石油烃含量的分布和变化趋势以及贝类体内石油烃含量水平和种间差异，并对3种介质中石油烃的污染状况进行了评价，最后探讨了贝类体内积累的石油烃及对贝类质量安全性的影响．结果表明：①桑沟湾贝类养殖海域海水中石油烃的含量范围在3.61～98.21 μg/L，沉积物均值含量范围在6.75～25.95 mg/kg，养殖贝类体内石油烃含量范围在2.14～42.87 mg/kg，贝体中石油烃含量存在明显的种间差异，平均含量由高到低依次为菲律宾蛤﹥牡蛎﹥扇贝．②桑沟湾贝类养殖海域海水和沉积物中石油烃的含量具有明显的月际变化，海水中石油烃含量以7月最高、8月最低，表层沉积物中石油烃含量以9月最高、3月最低．③桑沟湾贝类养殖海域表层海水污染状况为受到石油烃污染，表层沉积物污染状况为未受到石油烃污染，而养殖贝类污染状况为受到石油烃污染．不同贝类品种污染程度不尽相同，栉孔扇贝污染轻于菲律宾蛤和牡蛎．④进行了养殖贝类与其它2种暴露介质石油烃含量的线性回归分析，养殖贝类与表层海水的石油烃含量呈显著的正相关(r=0.87)，与表层沉积物石油烃含量只是有一般的正相关性(r=0.37)．⑤对贝类体内所含石油烃类而言，桑沟湾3种养殖贝类的食用安全风险相对较小． |
| 英文摘要 |
| Petroleum hydrocarbon concentrations in seawater, surface sediments and culture shellfish were investigated in shellfish culture area of Sanggou Bay from Jan. to Nov. in 2008. Investigation was conducted on the distribution and variation of petroleum hydrocarbon concentrations in seawater and sediments in the shellfish culture area of Sanggou Bay, as well as on the levels and the differences in petroleum hydrocarbon concentrations among the shellfish species. In addition, the petroleum hydrocarbon pollution status in the three media was evaluated and the effects of accumulated petroleum hydrocarbon in shellfish on the food safety risk were discussed. The results indicated: ① Petroleum hydrocarbon concentrations in seawater in the shellfish culture area of Sanggou Bay were in the range of 3.61-98.21 μg/L; the mean values of petroleum hydrocarbon concentrations in sediments were in the range of 6.75-25.95 mg/kg; petroleum hydrocarbon concentrations in culture shellfish were in the range of 2.14-42.87 mg/kg; and petroleum hydrocarbon concentrations in shellfish varied largely among different species, with the mean values in the sequence of clam Venerupis variegata > oyster > scallop; ② Monthly petroleum hydrocarbon concentrations in seawater and surface sediments varied significantly in Sanggou Bay shellfish culture area, with the highest and the lowest values of petroleum hydrocarbon concentrations in seawater that occurred in July and in August, respectively, and with the highest and the lowest values of petroleum hydrocarbon concentrations in surface sediments that occurred in September and in March, respectively; ③ According to the corresponding evaluation criteria, the petroleum hydrocarbon pollution status in surface sediments in Sanggou Bay shellfish culture area was unpolluted but the status in surface seawater was polluted. The culture shellfish was also polluted by petroleum hydrocarbon with different degrees among three species, namely, the pollution degree of clam Venerupis variegata and oyster was more serious than that of scallop Chlamys farreri; ④ The results of linear regression analysis showed that petroleum hydrocarbon concentrations in shellfish had a significantly positive correlation with the concentrations in seawater, while the linear correlation between the concentrations in shellfish and surface sediments was not obvious; and ⑤ According to the pollution level of petroleum hydrocarbon in shellfish, the food safety risk of three culture shellfishes in Sanggou Bay was relatively low. |
