A tracer study in an Alaskan gravel beach and its implications on the persistence of the Exxon Valdez oil.
A tracer study in an Alaskan gravel beach and its implications on the persistence of the Exxon Valdez oil.
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DOI：
10.1016/j.marpolbul.2011.03.011
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发表时间：
2011-06
影响因子：
5.8
通讯作者：
Hailong Li;M. Boufadel
中科院分区：
文献类型：
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作者：
Hailong Li;M. Boufadel
尽管做出了包括生物修复在内的巨大努力，1989年埃克森巴尔德斯石油泄漏仍然在美国阿拉斯加威廉王子湾的许多砾石海滩上持续存在。为了探索这个谜团，在其中一个海滩上沿着沿着两条横断面进行了锂示踪研究。利用MARUN二维数值模型成功地模拟了示踪剂的注入和运移过程。示踪剂停留时间更长的石油持续性，右样带（面向landwand）比在干净的，左样带。若将示踪剂近似视为原油，则在右侧样带上层原油进入下层的机会比左侧样带多。这可以定性地解释右侧样带内石油的持久性。当示踪剂被视为营养盐，长期停留在正确的样带内的营养盐意味着石油持久性沿着正确的样带是不是由于缺乏营养物质在生物修复。
Despite great efforts including bioremediation, the 1989 Exxon Valdez oil spills persist in many gravel beaches in Prince William Sound, Alaska, USA. To explore this mystery, a lithium tracer study was conducted along two transects on one of these beaches. The tracer injections and transports were successfully simulated using the 2-dimensional numerical model MARUN. The tracer stayed much longer in the oil-persisting, right transect (facing landwand) than in the clean, left transect. If the tracer is approximately regarded as oils, oils in the upper layer would have more opportunities to enter the lower layer in the right transect than in the left one. This may qualitatively explain the oil persistence within the right transect. When the tracer is regarded as nutrients, the long stay of nutrients within the right transect implies that the oil persistence along the right transect was not due to the lack of nutrients during the bioremediation.