舟山近岸海域沉积物中重金属的生物有效性研究

Study on bioavailability of heavy metals in sediments of coastal waters in Zhoushan

    摘要
  • 摘要: 对舟山附近海域沉积物中的酸可挥发性硫化物（AVS）、同步提取重金属（SEM）和5种重金属的分布进行了调查，并用（SEM-AVS）差值法对上述重金属的生物有效性进行了研究。结果表明，该海域表层沉积物中AVS和SEM含量均较低，AVS含量范围为0.005~4.21 μmol/g，平均含量为0.546 μmol/g，SEM含量范围为0.3356~1.614 μmol/g，平均含量为0.7998 μmol/g；表层沉积物中Cu、Pb、Zn、Cr和Cd的平均含量分别为24.65×10-6、27.21×10-6、114.5×10-6、58.26×10-6和0.142×10-6。（SEM-AVS）差值法的结果表明除5个站位外，其余站位沉积物中重金属对生物可能具有中等毒性。

     

    Abstract: The distributions of acid volatile sulfide (AVS), simultaneously extracted metals (SEM) and five heavy metals of surface sediments in coastal waters of Zhoushan were surveyed, and the bioavailability of aforementioned heavy metals were investigated based on the SEM minus AVS (SMV) method.Results indicated that both AVS and SEM presented lower concentration.The concentration of AVS ranged from 0.005 μmol/g to 4.21 μmol/g, and the average value was 0.5456 μmol/g.The concentration of SEM ranged from 0.3356 μmol/g to 1.614 μmol/g, and the average value was 0.7998 μmol/g.The average concentration of Cu, Pb, Zn, Cr and Cd were 24.65×10-6, 27.21×10-6, 114.5×10-6, 58.26×10-6g, and 0.142×10-6, respectively.The result of SMV method showed that heavy metals in sediments might have moderate toxicity to aquatic life except for 5 stations.

     

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