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Coupling of methyl and total mercury in a minerotrophic peat bog in southeastern Sweden

Regnell, Olof LU and Hammar, T (2004) In Canadian Journal of Fisheries and Aquatic Sciences 61(10). p.2014-2023
Abstract
During most of an annual cycle, we studied the temporal variation of total mercury (Hg-T) and methyl mercury (MeHg) in unfiltered and filtered (0.45 mu) peat water from a minerotrophic peat bog in southeastern Sweden. MeHg in bulk water ([MeHgT]) and total Hg in filtered water in discharge water from the peat bog ([Hg-D]) were an order of magnitude higher than in upland runoff water entering the peat bog. At the discharge end, peat-water [Hg-D] and [MeHgD] ranged from 8 to 54 pmol.L-1 and from 1 to 32 pmol.L-1, respectively. Whereas the variation of [MeHgT] was explained by changes in [MeHgD], the variation of inorganic Hg-T [IHgT] = [Hg-T] - [MeHgT] was explained by changes in particle-bound IHg [IHgP] = [IHgT] - [IHgD]. Filterable... (More)
During most of an annual cycle, we studied the temporal variation of total mercury (Hg-T) and methyl mercury (MeHg) in unfiltered and filtered (0.45 mu) peat water from a minerotrophic peat bog in southeastern Sweden. MeHg in bulk water ([MeHgT]) and total Hg in filtered water in discharge water from the peat bog ([Hg-D]) were an order of magnitude higher than in upland runoff water entering the peat bog. At the discharge end, peat-water [Hg-D] and [MeHgD] ranged from 8 to 54 pmol.L-1 and from 1 to 32 pmol.L-1, respectively. Whereas the variation of [MeHgT] was explained by changes in [MeHgD], the variation of inorganic Hg-T [IHgT] = [Hg-T] - [MeHgT] was explained by changes in particle-bound IHg [IHgP] = [IHgT] - [IHgD]. Filterable organic matter and sulfide in the water both correlated poorly with [Hg-D]. Neither did the amount of Hg-T in precipitation and upland runoff water correlate well with the estimated discharge of Hg-D from the peat bog. However, there was a strong correlation between [Hg-D] and [MeHgT] in the peat water (r = 0.96). Furthermore, a significant fraction of Hg-D was MeHg (mean 28%; range 8-60%). These results suggest that methylation increased the mobility of Hg. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Canadian Journal of Fisheries and Aquatic Sciences
volume
61
issue
10
pages
2014 - 2023
publisher
National Research Council Canada
external identifiers
  • wos:000226595900019
  • scopus:14644406883
ISSN
1205-7533
DOI
10.1139/F04-143
language
English
LU publication?
yes
id
3f4594eb-1091-4084-a102-274d778adc0e (old id 146176)
alternative location
http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_abst_e?cjfas_f04-143_61_ns_nf_cjfas10-04
date added to LUP
2007-06-27 11:52:54
date last changed
2017-01-01 04:48:22
@article{3f4594eb-1091-4084-a102-274d778adc0e,
  abstract     = {During most of an annual cycle, we studied the temporal variation of total mercury (Hg-T) and methyl mercury (MeHg) in unfiltered and filtered (0.45 mu) peat water from a minerotrophic peat bog in southeastern Sweden. MeHg in bulk water ([MeHgT]) and total Hg in filtered water in discharge water from the peat bog ([Hg-D]) were an order of magnitude higher than in upland runoff water entering the peat bog. At the discharge end, peat-water [Hg-D] and [MeHgD] ranged from 8 to 54 pmol.L-1 and from 1 to 32 pmol.L-1, respectively. Whereas the variation of [MeHgT] was explained by changes in [MeHgD], the variation of inorganic Hg-T [IHgT] = [Hg-T] - [MeHgT] was explained by changes in particle-bound IHg [IHgP] = [IHgT] - [IHgD]. Filterable organic matter and sulfide in the water both correlated poorly with [Hg-D]. Neither did the amount of Hg-T in precipitation and upland runoff water correlate well with the estimated discharge of Hg-D from the peat bog. However, there was a strong correlation between [Hg-D] and [MeHgT] in the peat water (r = 0.96). Furthermore, a significant fraction of Hg-D was MeHg (mean 28%; range 8-60%). These results suggest that methylation increased the mobility of Hg.},
  author       = {Regnell, Olof and Hammar, T},
  issn         = {1205-7533},
  language     = {eng},
  number       = {10},
  pages        = {2014--2023},
  publisher    = {National Research Council Canada},
  series       = {Canadian Journal of Fisheries and Aquatic Sciences},
  title        = {Coupling of methyl and total mercury in a minerotrophic peat bog in southeastern Sweden},
  url          = {http://dx.doi.org/10.1139/F04-143},
  volume       = {61},
  year         = {2004},
}