| Title: | Chlorine cycling and the fate of Cl in terrestrial environments |
| Author(s): | Svensson T; Kylin H; Montelius M; Sanden P; Bastviken D; |
| Address: | "Department of Thematic Studies - Environmental Change, Linkoping University, SE-581 83, Linkoping, Sweden. teresia.svensson@liu.se. 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. Swedish Geotechnical Institute (SGI), SE-581 93, Linkoping, Sweden" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-020-12144-6 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Print) 0944-1344 (Linking) |
| Abstract: | "Chlorine (Cl) in the terrestrial environment is of interest from multiple perspectives, including the use of chloride as a tracer for water flow and contaminant transport, organochlorine pollutants, Cl cycling, radioactive waste (radioecology; (36)Cl is of large concern) and plant science (Cl as essential element for living plants). During the past decades, there has been a rapid development towards improved understanding of the terrestrial Cl cycle. There is a ubiquitous and extensive natural chlorination of organic matter in terrestrial ecosystems where naturally formed chlorinated organic compounds (Cl(org)) in soil frequently exceed the abundance of chloride. Chloride dominates import and export from terrestrial ecosystems while soil Cl(org) and biomass Cl can dominate the standing stock Cl. This has important implications for Cl transport, as chloride will enter the Cl pools resulting in prolonged residence times. Clearly, these pools must be considered separately in future monitoring programs addressing Cl cycling. Moreover, there are indications that (1) large amounts of Cl can accumulate in biomass, in some cases representing the main Cl pool; (2) emissions of volatile organic chlorines could be a significant export pathway of Cl and (3) that there is a production of Cl(org) in tissues of, e.g. plants and animals and that Cl can accumulate as, e.g. chlorinated fatty acids in organisms. Yet, data focusing on ecosystem perspectives and combined spatiotemporal variability regarding various Cl pools are still scarce, and the processes and ecological roles of the extensive biological Cl cycling are still poorly understood" |
| Keywords: | Chlorides/analysis *Chlorine/analysis *Ecosystem Halogenation Soil 36Cl Aox Chloride Chlorine biogeochemical cycle Chloroform Hydrological tracer Methyl chloride Organochlorines chlorinated organic compounds; |
| Notes: | "MedlineSvensson, Teresia Kylin, Henrik Montelius, Malin Sanden, Per Bastviken, David eng Review Germany 2021/01/06 Environ Sci Pollut Res Int. 2021 Feb; 28(7):7691-7709. doi: 10.1007/s11356-020-12144-6. Epub 2021 Jan 5" |
