Ziyath Abdul M, Egodawatta Prasanna, Goonetilleke Ashantha
Science and Engineering Faculty, Queensland University of Technology (QUT), GPO Box 2434, Brisbane, QLD 4001, Australia.
Ecotoxicol Environ Saf. 2016 May;127:193-8. doi: 10.1016/j.ecoenv.2016.01.027. Epub 2016 Feb 8.
In the context of increasing threats to the sensitive marine ecosystem by toxic metals, this study investigated the metal build-up on impervious surfaces specific to commercial seaports. The knowledge generated from this study will contribute to managing toxic metal pollution of the marine ecosystem. The study found that inter-modal operations and main access roadway had the highest loads followed by container storage and vehicle marshalling sites, while the quay line and short term storage areas had the lowest. Additionally, it was found that Cr, Al, Pb, Cu and Zn were predominantly attached to solids, while significant amount of Cu, Pb and Zn were found as nutrient complexes. As such, treatment options based on solids retention can be effective for some metal species, while ineffective for other species. Furthermore, Cu and Zn are more likely to become bioavailable in seawater due to their strong association with nutrients. Mathematical models to replicate the metal build-up process were also developed using experimental design approach and partial least squares regression. The models for Cr and Pb were found to be reliable, while those for Al, Zn and Cu were relatively less reliable, but could be employed for preliminary investigations.
在有毒金属对敏感海洋生态系统的威胁日益增加的背景下，本研究调查了商业海港特有的不透水表面上的金属积累情况。本研究产生的知识将有助于管理海洋生态系统的有毒金属污染。研究发现，多式联运作业区和主要出入道路的负荷最高，其次是集装箱存储区和车辆编组场，而码头线和短期存储区的负荷最低。此外，研究发现铬、铝、铅、铜和锌主要附着在固体上，而大量的铜、铅和锌以营养复合物的形式存在。因此，基于固体截留的处理方案对某些金属物种可能有效，而对其他物种则无效。此外，由于铜和锌与营养物质的强关联，它们在海水中更有可能变得具有生物可利用性。还使用实验设计方法和偏最小二乘回归开发了复制金属积累过程的数学模型。发现铬和铅的模型可靠，而铝、锌和铜的模型相对不太可靠，但可用于初步调查。
