Concentrations of Fe, Mn, Cu, Zn, Pb, Ni, Cd, and Co in molluscan shells and associated surface sediments from four sites on the Gulf of Aqaba and Red Sea coasts, Egypt, were measured by using atomic absorption spectrophotometer. The results revealed an apparent difference in the ability of each species regarding accumulating heavy metals in its shell. These results showed that Tridacna squamosa has the highest accumulation ability for Pb, Ni, and Zn, and Chama pacifica has the highest accumulation capability for Co and Cd, whereas Periglypta reticulata has the highest accumulation ability for Cu. The results also showed that there is a positive correlation between the concentration of Cu, Zn, Pb, and Ni and the size of shell. Simultaneously, there is a negative correlation with Fe, Mn, Co, and Cd. The results of bio-accumulation of molluscan species were consistent with the enrichment factors for sediments, where the Hurghada site was extremely enriched with Pb and very enriched with Cu, Zn, and Ni. Moreover, the Quseir site was extremely enriched with Cd and very enriched with Pb. The Um al-Sid site was severe enriched with Cd and Pb. Meanwhile, the Ras Mohamed site was severe enriched with Pb and nearly unpolluted with other metals. Heavy metals can enter the studied ecosystem by terrigenous and anthropogenic sources as a weathering process of the nearby beaches and mountains, ship maintenance, industrial activities, wastewater, and traffic exhaust.

中文翻译：

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埃及红海沿岸双壳贝壳及相关沉积物中重金属的分布和累积能力。

使用原子吸收分光光度计测量了来自埃及亚喀巴湾和红海沿岸四个地点的软体动物壳和相关表面沉积物中铁，锰，铜，锌，铅，镍，镉和钴的浓度。结果揭示了每种物种在其壳中积累重金属的能力上存在明显差异。这些结果表明，鳞球藻对Pb，Ni和Zn具有最高的积累能力，而Chama pacifica对Co和Cd具有最高的积累能力，而Periglypta reticulata对Cu的最高积累能力。结果还表明，Cu，Zn，Pb和Ni的浓度与壳的大小呈正相关。同时，与Fe，Mn，Co和Cd呈负相关。软体动物物种的生物富集结果与沉积物的富集因子一致，在赫尔格达地区，铅非常富集，而铜，锌和镍却非常富集。此外，库瑟尔（Quseir）站点极富Cd，极富Pb。Um al-Sid站点严重富含Cd和Pb。同时，拉斯穆罕默德（Ras Mohamed）地点严重富含Pb，几乎不受其他金属污染。重金属可以通过陆源和人为源进入研究的生态系统，作为附近海滩和山脉的风化过程，船舶维护，工业活动，废水和交通尾气。Quseir站点富含Cd和Pb。Um al-Sid站点严重富含Cd和Pb。同时，拉斯穆罕默德（Ras Mohamed）地点严重富含Pb，几乎不受其他金属污染。重金属可以通过陆源和人为源进入研究的生态系统，作为附近海滩和山脉的风化过程，船舶维护，工业活动，废水和交通尾气。Quseir站点富含Cd和Pb。Um al-Sid站点严重富含Cd和Pb。同时，拉斯穆罕默德（Ras Mohamed）地点严重富含Pb，几乎不受其他金属污染。重金属可以通过陆源和人为源进入研究的生态系统，作为附近海滩和山脉的风化过程，船舶维护，工业活动，废水和交通尾气。