Heavy metal concentrations in marine sediments impacted by a mine-tailings spill, Marinduque Island, Philippines
Heavy metal concentrations in marine sediments impacted by a mine-tailings spill, Marinduque Island, Philippines
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DOI：
10.1007/s00254-002-0601-4
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发表时间：
2002-11-01
期刊：
影响因子：
--
通讯作者：
David, CP
中科院分区：
文献类型：
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作者：
David, CP
1996年3月24日，菲律宾马林杜克岛发生尾矿泄漏事故。来自Marcopper矿的尾矿污泥在随后的风暴事件中突然流下Boac河。此后，大部分尾矿堆积在该岛西海岸沿着的近岸环境中。从这个网站上收集了19个沉积物芯，并分析了重金属。尾矿中存在高浓度的Cu（706- 3，080 ppm）、Mn（445- 1，060 ppm）、Pb（43-56 ppm）和Zn（131-276 ppm）。海洋沉积物剖面中高金属浓度的两个层位被解释为对应于两个不同的尾矿输入事件。较低的水平线对应于1996年的原始溢出，而表面附近的尖峰被认为是1997年河流疏浚和沉积物改造造成的输入组合。从金属型材中还可以推断出以前的污染历史。由于泄漏而释放到海洋环境中的尾矿材料量估计为180，000至260，000立方米（3）。
A mine-tailings spill occurred on the island of Marinduque, Philippines, on 24 March 1996. Originating from the Marcopper Mine, tailings sludge flowed down the Boac River abruptly and during subsequent storm events. Most of the tailings material has since accumulated in the nearshore environment along the western coast of the island. Nineteen sediment cores were collected from this site and analyzed for heavy metals. Elevated concentrations of Cu (706-3,080 ppm), Mn (445-1,060 ppm), Pb (43-56 ppm), and Zn (131-276 ppm) are present in the tailings. Two horizons of high metal concentrations in the marine sediment profile are interpreted to correspond to two distinct tailings input events. The lower horizon corresponds to the original 1996 spill, whereas the spike near the surface is thought to be a combination of input due to dredging of the river in 1997 and reworking of sediments. A previous history of contamination is also deduced from the metal profiles. The volume of tailings material released into the marine environment due to the spill is estimated to be 180,000 to 260,000 m(3).