Conrad Stephen R, Santos Isaac R, Brown Dylan R, Sanders Luciana M, van Santen Michelle L, Sanders Christian J
National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, P.O. Box 157, Coffs Harbour, NSW 2540, Australia.
National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, P.O. Box 157, Coffs Harbour, NSW 2540, Australia.
Mar Pollut Bull. 2017 Sep 15;122(1-2):441-445. doi: 10.1016/j.marpolbul.2017.05.052. Epub 2017 Jul 11.
A mangrove sediment core was studied to evaluate possible pollution of an urban estuary in Coffs Harbour, Australia. The heavy metal and nutrient profiles revealed a ~2.5-fold enrichment in more recent sediments. Lead-210 dating showed increasing phosphorous (P) and copper (Cu) accumulation following agricultural activity and population growth in the catchment after 1950. In contrast, nitrogen (N) did not show enrichment suggesting no external sources. Mercury (Hg) depositional fluxes and recent enrichment may be associated to an increase in fossil fuel emissions in the region. Down-core lead (Pb) profiles reflect an increase in leaded gasoline in the 1950s, then a decrease as a result of phasing out leaded gasoline in 1986. The heavy metal and nutrient depositional fluxes are well preserved in mangrove sediments and were related to historical events in the catchment.
对一个红树林沉积物岩芯进行了研究，以评估澳大利亚科夫斯港一个城市河口可能受到的污染。重金属和营养物质分布显示，较新的沉积物中有约2.5倍的富集。铅-210测年表明，1950年后流域内农业活动和人口增长后，磷（P）和铜（Cu）的积累增加。相比之下，氮（N）没有显示出富集，表明没有外部来源。汞（Hg）的沉积通量和近期的富集可能与该地区化石燃料排放的增加有关。岩芯中铅（Pb）的分布反映了20世纪50年代含铅汽油的增加，然后由于1986年含铅汽油的逐步淘汰而减少。重金属和营养物质的沉积通量在红树林沉积物中保存完好，并与流域内的历史事件有关。
