Reconstructing 20thcentury lead pollution andsediment focusing in a peat land pool (Kempen, Belgium), via 210Pbdating |
| |
| Authors: | Jeroen E Sonke William C Burnett Jurian A Hoogewerff Sieger R van der Laan Jaco Vangronsveld D Reide Corbett |
| |
| Institution: | (1) National High Magnetic Field Laboratory and Florida State University, Geochemistry Division, Tallahassee, Fl-32306, USA;(2) Department of Oceanography, Florida State University, Tallahassee, Fl-32306, USA;(3) Institute of Food Research, Norwich Research Park, Norwich, NR4 7UA, United Kingdom;(4) Ceramics Research Centre, Corus RD&T, IJmuiden, The Netherlands;(5) Limburg University Center, Environmental Biology, B3590 Diepenbeek, Belgium |
| |
| Abstract: | Pb-210 dating of two metal-polluted organic sedimentcores obtained near a former pyrometallurgical zinc smelter in Lommel, Belgiumhave been used to reconstruct atmospheric lead deposition rates during the20th century. Independent knowledge concerning historical pollutionevents and 137Cs fall-out profiles has allowed a criticalevaluation of the CRS, CIC and CF-CS models for the 210Pb ageinterpretation. Resulting ages for the three models suggest that, in this case,the CIC model gives the most accurate interpretation of historical pollutionevents and atmospheric lead fall-out. The 210Pbwater-sediment flux was estimated at 141–1158Bq·m–2·yr–1 for one site and62–106 Bq·m–2·yr–1 at theother site, during the last century. The large difference illustrates thatsediment focusing was important on a small spatial scale (10 m).The direction of focusing correlates with the predominant wind direction.Maximum atmospheric lead deposition rates were found to be 1.63 ± 0.59g·m–2·yr–1 around 1968 AD,which is 2 orders of magnitude larger than the Belgian average in 1980 AD, and5 orders larger than Holocene atmospheric lead deposition. |
| |
| Keywords: | Atmospheric pollution Lead Organic sediment Sediment focusing |
| 本文献已被 SpringerLink 等数据库收录！ |
|
