PMID- 28711567 OWN - NLM STAT- MEDLINE DCOM- 20171211 LR - 20181202 IS - 1873-6424 (Electronic) IS - 0269-7491 (Linking) VI - 229 DP - 2017 Oct TI - The trans-continental distributions of pentachlorophenol and pentachloroanisole in pine needles indicate separate origins. PG - 688-695 LID - S0269-7491(17)30220-8 [pii] LID - 10.1016/j.envpol.2017.07.010 [doi] AB - The production and use of pentachlorophenol (PCP) was recently prohibited/restricted by the Stockholm Convention on persistent organic pollutants (POPs), but environmental data are few and of varying quality. We here present the first extensive dataset of the continent-wide (Eurasia and Canada) occurrence of PCP and its methylation product pentachloroanisole (PCA) in the environment, specifically in pine needles. The highest concentrations of PCP were found close to expected point sources, while PCA chiefly shows a northern and/or coastal distribution not correlating with PCP distribution. Although long-range transport and environmental methylation of PCP or formation from other precursors cannot be excluded, the distribution patterns suggest that such processes may not be the only source of PCA to remote regions and unknown sources should be sought. We suggest that natural sources, e.g., chlorination of organic matter in Boreal forest soils enhanced by chloride deposition from marine sources, should be investigated as a possible partial explanation of the observed distributions. The results show that neither PCA nor total PCP (SigmaPCP = PCP + PCA) should be used to approximate the concentrations of PCP; PCP and PCA must be determined and quantified separately to understand their occurrence and fate in the environment. The background work shows that the accumulation of airborne POPs in plants is a complex process. The variations in life cycles and physiological adaptations have to be taken into account when using plants to evaluate the concentrations of POPs in remote areas. CI - Copyright (c) 2017 Elsevier Ltd. All rights reserved. FAU - Kylin, Henrik AU - Kylin H AD - Department of Thematic Studies - Environmental Change, Linkoping University, SE-581 83 Linkoping, Sweden; Research Unit: Environmental Sciences and Management, North-West University, Potchefstroom, South Africa. Electronic address: henrik.kylin@liu.se. FAU - Svensson, Teresia AU - Svensson T AD - Department of Thematic Studies - Environmental Change, Linkoping University, SE-581 83 Linkoping, Sweden. FAU - Jensen, Soren AU - Jensen S AD - Department of Analytical Chemistry and Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden. FAU - Strachan, William M J AU - Strachan WMJ AD - Aquatic Ecosystem Protection Research Division, Science and Technology Branch, Environment and Climate Change Canada, 867 Lakeshore Rd., Burlington, ON L7S 1A1, Canada. FAU - Franich, Robert AU - Franich R AD - Scion, Te Papa Tipu Innovation Park, 49 Sala Street, Rotorua 3046, New Zealand. FAU - Bouwman, Hindrik AU - Bouwman H AD - Research Unit: Environmental Sciences and Management, North-West University, Potchefstroom, South Africa. LA - eng PT - Journal Article DEP - 20170713 PL - England TA - Environ Pollut JT - Environmental pollution (Barking, Essex : 1987) JID - 8804476 RN - 0 (Anisoles) RN - 0 (Environmental Pollutants) RN - 0 (Soil) RN - 14D125MH3W (pentachloroanisole) RN - D9BSU0SE4T (Pentachlorophenol) SB - IM MH - Anisoles/*analysis MH - Canada MH - *Environmental Monitoring MH - Environmental Pollutants/*analysis MH - Pentachlorophenol/*analysis MH - Pinus/*chemistry MH - Soil/chemistry OTO - NOTNLM OT - Environmental processes OT - Long-range transport OT - Natural chlorinated compounds OT - Persistent organic pollutants OT - Stockholm convention EDAT- 2017/07/18 06:00 MHDA- 2017/12/12 06:00 CRDT- 2017/07/17 06:00 PHST- 2017/01/17 00:00 [received] PHST- 2017/05/09 00:00 [revised] PHST- 2017/07/05 00:00 [accepted] PHST- 2017/07/18 06:00 [pubmed] PHST- 2017/12/12 06:00 [medline] PHST- 2017/07/17 06:00 [entrez] AID - S0269-7491(17)30220-8 [pii] AID - 10.1016/j.envpol.2017.07.010 [doi] PST - ppublish SO - Environ Pollut. 2017 Oct;229:688-695. doi: 10.1016/j.envpol.2017.07.010. Epub 2017 Jul 13.