A preliminary environmental assessment of four heavy metals (Mn, Pb, Zn and Fe) on the coast of Campeche, Mexico was carried out. Surface sediments (0–10 cm), water and plants were collected in four sites of the coastline to obtain information about the levels and spatial distribution of the selected elements. The bioconcentration factor (BCF) was calculated for plants, where the BCF of Mn (3.375–3.558) and Zn (0.291–0.888) were high for Conocarpus erectus (button mangrove) and the BCF of Fe ranged from 0.022 to 0.023 in Laguncularia racemosa (white mangrove). This study showed that a significant source of metal contamination in the coastline of Campeche could be the discharge of municipal sewage. The relationship among metals, water, sediments and plants revealed a distinct behaviour of metals transportation in the marine environment. Mangroves operated as excluder species for nonessential metals (Pb) and accumulators for essential metals (Zn). Results showed that mangroves could be employed as a phytostabiliser of heavy metals.

中文翻译：

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评估墨西哥沿海地区水，沉积物和植物中重金属的积累

对墨西哥坎佩切州海岸的四种重金属（锰，铅，锌和铁）进行了初步环境评估。在海岸线的四个地点收集了表面沉积物（0-10厘米），水和植物，以获取有关所选元素的水平和空间分布的信息。计算了植物的生物富集因子（BCF），其中直立果（纽扣红树林）的Mn（3.375–3.558）和Zn（0.291–0.888）的BCF较高，而在Laguncularia racemosa中，Fe的BCF介于0.022至0.023之间。（白红树林）。这项研究表明，坎佩切州海岸线上的重要金属污染源可能是城市污水的排放。金属，水，沉积物和植物之间的关系揭示了海洋环境中金属运输的独特行为。红树林作为非必需金属（Pb）的排除物种和必需金属（Zn）的累积物种。结果表明，红树林可以用作重金属的植物稳定剂。