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Dynamic modelling of atmospherically-deposited Ni, Cu, Zn, Cd and Pb in Pennine catchments (northern England)

Tipping, E.; Rothwell, J.J.; Shotbolt, L.; Lawlor, A.J.. 2010 Dynamic modelling of atmospherically-deposited Ni, Cu, Zn, Cd and Pb in Pennine catchments (northern England). Environmental Pollution, 158 (5). 1521-1529. 10.1016/j.envpol.2009.12.026

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Abstract/Summary

Simulation modelling with CHUM-AM was carried out to investigate the accumulation and release of atmospherically-deposited heavy metals (Ni, Cu, Zn, Cd and Pb) in six moorland catchments, five with organic-rich soils, one with calcareous brown earths, in the Pennine chain of northern England. The model considers two soil layers and a third layer of weathering mineral matter, and operates on a yearly time-step, driven by deposition scenarios covering the period 1400 to 2010. The principal processes controlling heavy metals are competitive solid-solution partitioning of solutes, chemical interactions in solution, and chemical weathering. Agreement between observed and simulated soil metal pools and surface water concentrations for recent years was generally satisfactory, the results confirming that most contemporary soil metal is from atmospheric pollution. Metals in catchments with organic-rich soils show some mobility, especially under more acid conditions, but the calcareous mineral soils have retained nearly all anthropogenic metal inputs. Complexation by dissolved organic matter and co-transport accounts for up to 80% of the Cu in surface waters.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.envpol.2009.12.026
Programmes: CEH Topics & Objectives 2009 onwards > Biogeochemistry > BGC Topic 2 - Biogeochemistry and Climate System Processes > BGC - 2.1 - Quantify & model processes that control the emission, fate and bioavailability of pollutants
CEH Sections: Shore
ISSN: 0269-7491
NORA Subject Terms: Ecology and Environment
Chemistry
Date made live: 20 Apr 2010 15:28
URI: http://nora.nerc.ac.uk/id/eprint/9555

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