Huang Kuo-Ming, Lin Saulwood
Institute of Oceanography, National Taiwan University, #1, Section 4, Roosevelt Rd., Taipei 106, Taiwan.
Chemosphere. 2003 Dec;53(9):1113-21. doi: 10.1016/S0045-6535(03)00592-7.
A great deal of effort was enforced to reduce the pollution of the Keelung River in the past 20 years. A set of sediments covering most of the Keelung River drainage basin was analyzed for bulk sediment heavy metal concentrations, grain size content and Pb-210 dating in order to understand the spatial variations of sediment heavy metal contents as well as to evaluate the effectiveness of pollution control. The results showed that anthropogenic pollution and grain size are two of the most important factors in controlling spatial variations of metals in the Keelung River sediments. In addition, little reduction of sediment heavy metal concentrations was observed in the Keelung River drainage basin. Large spatial variations of metals and grain size were observed. High concentrations of zinc, copper, lead and cadmium were found in sediments near the main outlets of the adjacent Da-Wu-Lun Industrial Park and municipal waste drainage systems. Anthropogenic sources of heavy metal have altered the natural sediment heavy metal distributions. Positive linear relationships between aluminum, iron and fine-grained sediments showed that spatial grain size variations controlled the natural aluminum and iron concentrations in sediments. Zinc, copper, lead and cadmium contents were much higher than those measured 15 years ago. The unusually high concentrations of heavy metals, high enrichment factors and their rapid increases with time in Pb-210 dated core showed that the efforts in heavy metal reduction were futile. A proper regulation to prevent further heavy metals from entering into the river is urgently needed.
在过去20年里，人们付出了巨大努力来减少基隆河的污染。为了了解沉积物重金属含量的空间变化以及评估污染控制的效果，对覆盖基隆河流域大部分地区的一组沉积物进行了分析，测定了沉积物中重金属总量、粒度成分和铅-210年代测定。结果表明，人为污染和粒度是控制基隆河沉积物中金属空间变化的两个最重要因素。此外，在基隆河流域，沉积物重金属浓度几乎没有下降。观察到金属和粒度存在很大的空间变化。在相邻的大武仑工业园区和城市污水排放系统的主要出水口附近的沉积物中发现了高浓度的锌、铜、铅和镉。重金属的人为来源改变了沉积物中重金属的自然分布。铝、铁与细粒沉积物之间呈正线性关系，表明空间粒度变化控制了沉积物中铝和铁的自然浓度。锌、铜、铅和镉的含量比15年前测定的含量高得多。在铅-210年代测定的岩芯中，重金属浓度异常高、富集系数高且随时间快速增加，表明减少重金属的努力是徒劳的。迫切需要采取适当的监管措施，防止更多重金属进入河流。
