Technological Institute of Mazatlan, Mazatlan, Sinaloa, México.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2009 Dec;44(14):1503-11. doi: 10.1080/10934520903263280.
With the objective of estimating the temporal variation and bioavailability of Cd, Cu, Pb and Zn in Coatzacoalcos estuary, the biota-sediment accumulation factors (BSAF) were calculated. For this purpose, surficial sediments and clams from 14 selected sites were collected during three climatic seasons. In surficial sediments, highest levels of Cd and Cu were measured during the rainy season near to the industrial area of Minatitlan, while highest concentrations of Pb and Zn were registered during the windy season in sediments collected near to the industrial area of Coatzacoalcos. Considering all the sampling seasons and bivalve species, average metal concentrations followed the order Zn > Cu > Cd > Pb. BSAF ranged from 0.01 (Pb) in Corbicula fluminea during the hot season to 25.1 (Cd) in Polymesoda caroliniana during the windy season. BSAF of Cd, Cu and Zn were higher during the windy season; in the case of Pb, the dry season was the time when such figure was more elevated. It can be stated that Polymesoda caroliniana is a net accumulator of Cd and Zn and a weak accumulator of Pb for the studied estuary.
为了评估科阿特佩克湾口处镉、铜、铅和锌的时间变化和生物可利用性，计算了生物沉积物积累因子（BSAF）。为此，在三个气候季节期间，从 14 个选定的地点采集了表层沉积物和贻贝。在表层沉积物中，米那提兰工业区域附近的雨季中测量到了最高水平的镉和铜，而在靠近科阿特佩克湾口工业区域的沉积物中，风季中记录到了最高浓度的铅和锌。考虑到所有的采样季节和双壳类物种，平均金属浓度的顺序为 Zn > Cu > Cd > Pb。BSAF 的范围从热季中 Corbicula fluminea 的 0.01（Pb）到风季中 Polymesoda caroliniana 的 25.1（Cd）。镉、铜和锌的 BSAF 在风季较高；对于铅，旱季是这种情况更高的时期。可以说，对于研究中的河口，Polymesoda caroliniana 是镉和锌的净积累者，而铅的积累能力较弱。
