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JEG DM: heavy metals

JEG DM: heavy metals.

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JEG DM: heavy metals

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  1. JEG DM: heavy metals • 15. Metal accumulation and leaching could be approximately explained by deposition, weathering, speciation, soil acidity and run-off. Currently available dynamic models were hard to validate due to the slow responses and the paucity of long-time series available. There was a need to establish appropriate space for time analogues. • 16. The leaching of Ni, Zn and Cd from soils responded relatively rapidly (decades) while Cu, Pb and Hg responded more slowly (centuries). Key controls included metal deposition, acidity status and soil organic matter. The latter one was most likely to be influenced by land use and climate change.

  2. JEG DM: heavy metals • 17. Nevertheless, JEG emphasized the importance of ensuring thatpolicy continued to control the release of metals into the environment. Release of heavy metals from soil was a long-term process and that should not detract from efforts to reduce emissions.

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