Brady James P, Ayoko Godwin A, Martens Wayde N, Goonetilleke Ashantha
Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, QLD, 4001, Australia.
Environ Monit Assess. 2015 May;187(5):306. doi: 10.1007/s10661-015-4563-x. Epub 2015 Apr 30.
Heavy metal pollution of sediments is a growing concern in most parts of the world, and numerous studies focussed on identifying contaminated sediments by using a range of digestion methods and pollution indices to estimate sediment contamination have been described in the literature. The current work provides a critical review of the more commonly used sediment digestion methods and identifies that weak acid digestion is more likely to provide guidance on elements that are likely to be bioavailable than other traditional methods of digestion. This work also reviews common pollution indices and identifies the Nemerow Pollution Index as the most appropriate method for establishing overall sediment quality. Consequently, a modified Pollution Index that can lead to a more reliable understanding of whole sediment quality is proposed. This modified pollution index is then tested against a number of existing studies and demonstrated to give a reliable and rapid estimate of sediment contamination and quality.
沉积物中的重金属污染在世界大部分地区日益受到关注，文献中已有大量研究聚焦于通过一系列消解方法和污染指数来识别受污染的沉积物，以估算沉积物污染情况。当前的工作对更常用的沉积物消解方法进行了批判性综述，并指出与其他传统消解方法相比，弱酸消解更有可能为生物可利用元素提供指导。这项工作还回顾了常见的污染指数，并确定内梅罗污染指数是确定沉积物总体质量的最合适方法。因此，提出了一种经改进的污染指数，它能使人们对沉积物整体质量有更可靠的认识。然后，将这种改进后的污染指数与一些现有研究进行对比测试，结果表明它能可靠且快速地估算沉积物污染和质量。
