González-Macías C, Schifter I, Lluch-Cota D B, Méndez-Rodríguez L, Hernández-Vázquez S
Instituto Mexicano del Petróleo, Competencia de Estudios Ambientales, Eje Central Lázaro Cárdenas No. 152, San Bartolo Atepehuacan, México, DF 07730, Mexico.
Environ Monit Assess. 2006 Jul;118(1-3):211-30. doi: 10.1007/s10661-006-1492-8.
Surface sediment samples collected from the Salina Cruz Bay in the last twenty years, were analyzed for the total available trace elements (Cr, Cu, Fe, Pb, Ni, V, and Zn) to evaluate metal contamination due to possible anthropogenic inputs. Normalization of metals to iron and fine-grained fraction (< 63 microm) indicated relatively high enrichment factors for lead during the last two decades. Sediment Quality Guidelines suggest that lead must be considered as a chemical of potential concern in the marine and estuarine ecosystem. Concentration levels of lead ranged from 5-124 microg/g, while Ni and V below 70 and 30 microg/g, respectively. Geoaccumulation and enrichment factors for the rest of elements show comparable values to those reported for sites with similar activities in the world. Spatial distribution suggests that in addition to harbor activities, a transboundary source for Pb must account for the observed trends.
对过去二十年来从萨利纳克鲁斯湾采集的表层沉积物样本进行了分析，以检测其中的总有效微量元素（铬、铜、铁、铅、镍、钒和锌），从而评估可能的人为输入导致的金属污染情况。将金属含量与铁和细颗粒部分（<63微米）进行归一化处理后发现，在过去二十年中铅的富集系数相对较高。沉积物质量指南表明，铅必须被视为海洋和河口生态系统中具有潜在影响的化学物质。铅的浓度水平在5 - 124微克/克之间，而镍和钒的浓度分别低于70微克/克和30微克/克。其他元素的地积累和富集系数与世界上具有类似活动的地点所报告的值相当。空间分布表明，除了港口活动外，铅的跨界来源必须能够解释所观察到的趋势。
