Ahumada R, Vargas J
Departamento de Química Ambiental, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Conception, Chile.
Environ Monit Assess. 2005 Jan;100(1-3):11-22. doi: 10.1007/s10661-005-7056-5.
The present study deals with sediment dynamics affecting sediment-associated metal distributions in an embayment system experiencing pollution from coastal industries. Sedimentary metal content may originate from diagenetic processes of foundation rock on the bottom, allochthonous minerals from natural sources, and metals from industrial effluents along the coast. The study presents experimental estimations of quantities of metals entering the bay in industrial waste-water, measurements of metal content in particulate material captured in sediment traps, and metals distribution in surface sediments. Quantitative estimations of metals entering the system in industrial effluent showed the relation Pb > or = Zn > Cu > Cr > or = Ni > Cd. That of metals associated with particulate material from traps was Zn > Cr approximately equal to Cu > or = Pb > Ni > Cd and the abundance of metals in sediments was Zn > Cr > Cu > Pb > Ni > Cd. Finally, rates of bottom sediment accumulation are estimated in relation to the time of residence of water in the bay. The experimental data on sedimentation and sediment abundance were consistent with field observations on distribution and accumulation at sites of major sedimentation in this bay.
本研究探讨了在一个受沿海工业污染的港湾系统中，影响与沉积物相关的金属分布的沉积物动力学。沉积金属含量可能源于底部基岩的成岩过程、天然来源的外源矿物以及沿海工业废水的金属。该研究给出了工业废水中进入海湾的金属量的实验估计值、沉积物捕集器中捕获的颗粒物质的金属含量测量值以及表层沉积物中的金属分布。工业废水中进入系统的金属的定量估计表明，其关系为Pb≥Zn＞Cu＞Cr≥Ni＞Cd。与捕集器中颗粒物质相关的金属的关系为Zn＞Cr≈Cu≥Pb＞Ni＞Cd，沉积物中金属的丰度为Zn＞Cr＞Cu＞Pb＞Ni＞Cd。最后，根据水在海湾中的停留时间估算了底部沉积物的积累速率。关于沉积和沉积物丰度的实验数据与该海湾主要沉积地点的分布和积累的现场观测结果一致。
