Department of Environmental Pollution, Science and Research Branch, Islamic Azad University, Ahvaz, Khouzestan, Iran.
Bull Environ Contam Toxicol. 2012 Jun;88(6):951-5. doi: 10.1007/s00128-012-0599-6. Epub 2012 Apr 6.
The concentrations of Zn, Cd and Pb were determined in tissues (shell and soft tissue) of 144 of bivalve mollusks (Solen brevis) and 15 samples of surface sediment collected from three locations in intertidal zones of Bushehr coast, Persian Gulf, Iran in May 2011. The mean concentrations of Zn, Cd and Pb in the sediment samples were 26.2, 1.25, and 21.1 μg/g dw, respectively. The mean levels of Zn, Cd and Pb in the clam samples were 63.3, 0.67, and 4.38 μg/g dw in soft tissue and 10. 7, 1.53, and 15.6 μg/g dw in shell, respectively. The degrees of variability (CV %) for Cd and Pb within the shells were lower than for soft tissues, whereas the CV for Zn was lower in the soft tissue than in the shell, indicating that there is more precision (lower CV) in the determination of Cd and Pb in the shells and Zn in the soft tissues. Significant correlation were found between Cd (r = 0.63; p < 0.05) and Pb (r = 0.78; p < 0.01) concentrations in the shell of S. brevis and their concentrations in the surface sediments. Indeed, Zn concentrations in the soft tissue of S. brevis significantly (r = 0.63; p < 0.05) correlated with Zn concentrations in surface sediments. The results of this study suggest that the shell of S. brevis may serve as a reliable biomonitor for Cd and Pb, and the soft tissue for Zn.
2011 年 5 月，在伊朗波斯湾布什尔海岸潮间带的三个地点采集了 144 只短滨螺（Solen brevis）的组织（壳和软组织）和 15 个表层沉积物样本，并测定了其中的 Zn、Cd 和 Pb 浓度。沉积物样本中 Zn、Cd 和 Pb 的平均浓度分别为 26.2、1.25 和 21.1μg/g dw。软体组织中 Zn、Cd 和 Pb 的平均水平分别为 63.3、0.67 和 4.38μg/g dw，壳组织中分别为 10.7、1.53 和 15.6μg/g dw。壳组织中 Cd 和 Pb 的变异性（CV%）低于软体组织，而 Zn 的 CV 则低于壳组织，这表明在壳组织中 Cd 和 Pb 以及软体组织中 Zn 的测定精度更高（CV 更低）。在 S. brevis 的壳中发现 Cd（r = 0.63；p < 0.05）和 Pb（r = 0.78；p < 0.01）浓度与表层沉积物中的浓度之间存在显著相关性。事实上，S. brevis 软体组织中的 Zn 浓度与表层沉积物中的 Zn 浓度呈显著相关（r = 0.63；p < 0.05）。本研究结果表明，S. brevis 的壳可以作为 Cd 和 Pb 的可靠生物监测物，而软体组织则可以作为 Zn 的生物监测物。
