Université Européenne de Bretagne, Université de Brest, UMR CNRS 6521 CEMCA, 6 av. Le Gorgeu, 29238 Brest Cedex 3, France.
Mar Pollut Bull. 2010 Jul;60(7):998-1004. doi: 10.1016/j.marpolbul.2010.02.002. Epub 2010 Mar 5.
This study examined the potential metal pollution induced by the accidental spill of different acids into seawater. The acids sink to the bottom according to their densities and subsequently react with marine sediments. The acids selected for this study were acetic, hydrochloric, nitric, sulfuric, and phosphoric acids; the metallic elements selected were Cr, Cu, Fe, Mn, Pb and Zn. The sediment was collected in Brest Harbour. The percentages of metals released from this sediment in the presence of various concentrations of acids in seawater were important; concentrations of approximately 7 mg L(-1) for Mn and 60 mg L(-1) for Zn were observed under our experimental conditions. We also examined the rate of release of these metals from the sediment into the seawater in the presence of the different acids and under different experimental conditions. We found that most of the metallic elements were released from the sediments into the seawater during the first fifteen minutes of exposure. After this time, a high degree of pollution was induced if acids leached into seawater were not rapidly diluted.
本研究考察了不同酸意外泄漏到海水中可能引起的潜在金属污染。酸根据其密度下沉到底部，随后与海洋沉积物发生反应。本研究选择的酸是乙酸、盐酸、硝酸、硫酸和磷酸；选择的金属元素是 Cr、Cu、Fe、Mn、Pb 和 Zn。沉积物是在布雷斯特港收集的。在海水中存在各种浓度的酸的情况下，从该沉积物中释放的金属百分比很重要；在我们的实验条件下，Mn 的浓度约为 7 mg L(-1)，Zn 的浓度约为 60 mg L(-1)。我们还研究了在存在不同酸和不同实验条件下，这些金属从沉积物中释放到海水中的速率。我们发现，在暴露的最初 15 分钟内，大多数金属元素从沉积物中释放到海水中。在此之后，如果进入海水的酸没有迅速稀释，就会产生高度污染。
