NDLI: The Biogeochemistry of Metal-Contaminated Peatlands in Sudbury, Ontario, Canada

Content Provider	Springer Nature Link
Author	Pennington, P. R. Watmough, S.
Copyright Year	2015
Abstract	Understanding the biogeochemistry of metal-contaminated peatlands is important for predicting the impact of mining and industrial activities on peatlands and downstream surface waters and for predicting recovery of previously impacted sites. The objective of this work was to characterize the factors controlling spatial and temporal variability in surface peat (0–15 cm) and pore water chemistry of 18 regionally representative peatlands in Sudbury, Ontario, Canada. The pollution gradient is clearly evident as Cu and Ni concentrations in surface peat are elevated close to the main Copper Cliff smelter. Surface peat also differs greatly in acidity (pH) and organic matter content among sites, and dissolved organic carbon (DOC) concentrations in pore water are positively correlated with peat carbon content. In addition, sites having surface peat that is more decomposed also have pore water DOC that is more humified. Pore water chemistry varies seasonally; samples taken in late summer and fall were characterized by higher SO$_{4}$, and lower pH and higher concentrations of base cations and metals such as Ni, Co, and Mn compared with those in late spring that had higher DOC, higher pH, and higher concentrations of metals such as Cu and Fe. Despite the large spatial and temporal variability in pore water chemistry, soil-solution partitioning (K $_{d}$) of some metals (Ni, Co, and Mn) can be explained by pH alone. Modeling soil-solution partitioning for these metals and Cu, Al, and Fe is significantly improved with the addition of SO$_{4}$; dissolved organic matter quality and quantity and/or the δ$^{18}$O signature of the pore water in regression models indicating several factors other than acidity has an influence on pore water chemistry.
Starting Page	1
Ending Page	19
Page Count	19
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	226
Issue Number	10
e-ISSN	15732932
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-09-04
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wetlands Metals Sudbury Dissolved organic carbon Acidity Peat Climate Environment Water Quality/Water Pollution Atmospheric Protection/Air Quality Control/Air Pollution Soil Science & Conservation Hydrogeology Climate Change/Climate Change Impacts
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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