Will the harvesting of drained peatland forests mobilize mercury?

摘要：

Much of the 4.5 Mha of drained peatland forests in Finland are approaching harvesting. We describe the results from a pilot study for a planned project aimed at assessing the risk of harvesting peatland forests in small catchments on the mobilization of Hg and loading to surface waters. Concentrations of Hg in the upper 50cm of peat reached 0.25mg·kg<-1> in catchments underlain by black shale (Hg-rich) but where 10 times less in a catchment underlain by granodiorite. The pre-harvesting concentrations of total Hg in the ditch waters ranged from 2.4 to 7.3ng·L<-1> and those of methyl Hg from 0.12-1.20ng·L<-1>. Harvesting is expected to result in a considerable release of Hg from the surface peat layer and loading to ditch waters, especially in the case of catchments underlain by black shales.

关键词： Black shales catchment, ditch water forestry, total and methyl Hg

作者: M. Starr P. Peramaki L. Ukonmaanaho E. Ahti M. Kantola T. Nieminen J. Piispanen K. Loukola-Ruskeeniemi M. Makila T. Malila

作者单位: University of Helsinki, Dept. of Forest Ecology, P. O. B 27, FI-00014 University of Helsinki, Finlan University of Oulu, Faculty of Sciences, P. O. B 3000, FI-90014 University of Oulu, Finland Finnish Forest Research Institute, Vantaa Research Unit, P. O. B 18, FI-01301 Vantaa, Finland Finnish Forest Research Institute, Muhos Research Unit, Kirkkosaarentie 7, FI-91500 Muhos, Finland Helsinki University of Technology, Dept. of Civil and Environmental Engineering, P. O. B 6200, FI-02 Geological Survey of Finland, P. O. B 96, FI-02151 Espoo, Finland

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 495-496

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）