Historical record of human impact in a lake of northern China: Magnetic susceptibility,nutrients, heavy metals and OCPs |
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| Affiliation: | 1. Department of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark;2. Environmental Archaeology and Materials Science, The National Museum of Denmark, I. C. Modewegs Vej, 2800 Kongens Lyngby, Denmark;3. Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen K, Denmark;1. Energy Systems Division, Argonne National Laboratory, Argonne, IL 60439, United States;2. Electric Power Research Institute, Palo Alto, CA 94304, United States;3. Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138, United States;4. Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States;1. Geoscience Centre, Department of Applied Geology, Hydrochemistry Group, University of Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany;2. Geoscience Centre, Department of Sedimentology and Environmental Geology, University of Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany |
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| Abstract: | The historical record (1859–2011) of magnetic susceptibility, total organic carbon, total nitrogen, δ13Corg, δ15N, As, Cd, Hg, Pb, and organochlorine pesticide (OCP) signatures in Baiyangdian Lake was used to analyze the water environmental changes due to human activities. The results indicate the following: the status of the lake approaches the background condition in 1859–1950s; the lake suffered increasing anthropogenic effects from the 1950s because of increasing human activities such as coal-fired power plant operations since 1958, fertilizer use in the agriculture and land transformation since the 1950s, steelmaking between the 1960s and 1970s, machinery manufacturing since the 1970s, use of petrol containing alky-lead since 1990; the lake has been in a contaminated condition since the 2000s. This study confirms that OCPs have been effectively controlled in the area, the level of nutrient and heavy metal pollution is increasing, coal-fired power plants are an important source of Hg, and the use of petrol containing alky-lead has accelerated the accumulation of Pb in the environment. The study indicates that magnetic susceptibility can be used as a rapid, simple, and non-destructive tool for assessment of organic and heavy metal pollution in the lake. |
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| Keywords: | Freshwater lake Magnetic susceptibility Nutrient Heavy metal Organochlorines Environmental change |
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