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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Svensson, Teresia Lourino-Cabana, Beatriz Montelius, Malin Bastviken, David Thiry, Yves |
| Description | Author Affiliation: Montelius M ( Department of Thematic Studies - Environmental Change, Linköping University, 581 83 Linköping, Sweden. Electronic address: malin.montelius@liu.se.); Svensson T ( Department of Thematic Studies - Environmental Change, Linköping University, 581 83 Linköping, Sweden.); Lourino-Cabana B ( EDF, Laboratoire National d'Hydraulique et Environnement, 78401 Chatou, France.); Thiry Y ( Andra, Research and Development Division, Parc de la Croix Blanche, 1/7 rue Jean Monnet, 92298 Châtenay-Malabry Cedex, France.); Bastviken D ( Department of Thematic Studies - Environmental Change, Linköping University, 581 83 Linköping, Sweden.) |
| Abstract | Much of the total pool of chlorine (Cl) in soil consists of naturally produced organic chlorine (Clorg). The chlorination of bulk organic matter at substantial rates has been experimentally confirmed in various soil types. The subsequent fates of Clorg are important for ecosystem Cl cycling and residence times. As most previous research into dechlorination in soils has examined either single substances or specific groups of compounds, we lack information about overall bulk dechlorination rates. Here we assessed bulk organic matter chlorination and dechlorination rates in coniferous forest soil based on a radiotracer experiment conducted under various environmental conditions (additional water, labile organic matter, and ammonium nitrate). Experiment results were used to develop a model to estimate specific chlorination (i.e., fraction of Cl(-) transformed to Clorg per time unit) and specific dechlorination (i.e., fraction of Clorg transformed to Cl(-) per time unit) rates. The results indicate that chlorination and dechlorination occurred simultaneously under all tested environmental conditions. Specific chlorination rates ranged from 0.0005 to 0.01 d(-1) and were hampered by nitrogen fertilization but were otherwise similar among the treatments. Specific dechlorination rates were 0.01-0.03d(-1) and were similar among all treatments. This study finds that soil Clorg levels result from a dynamic equilibrium between the chlorination and rapid dechlorination of some Clorg compounds, while another Clorg pool is dechlorinated more slowly. Altogether, this study demonstrates a highly active Cl cycling in soils. |
| ISSN | 00489697 |
| Journal | Science of The Total Environment |
| Volume Number | 554-555 |
| e-ISSN | 18791026 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-06-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Waste Management and Disposal Pollution Environmental Engineering |
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