Origin and occurrence of halogenated organic matter in soil

Asplund, G.

doi:10.1007/978-94-011-0061-8_3

Cited by 19 publications

(12 citation statements)

References 13 publications

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“…However, the data that have so far been collected are too scattered to permit differentiated estimates for various types of plants or plant tissues. In addition, a recent study by Myneni (2002) suggests that the concentration of Cl org in biomass might be lower than the studies by Asplund (1995) and Nkusi and Miller (1995) suggest. We therefore base our estimates on the assumption that the Cl org content of vegetation is in the lower range of previous determinations, i.e.…”

Section: Org In Biomassmentioning

confidence: 71%

“…In one study, eight plant species representing different plant families were analyzed for the total amount of Cl org (Nkusi and Mu¨ller 1995), and concentrations were found to range from 0.07 to 0.1 mg Cl org g À1 (d.w.). In another study, common beech leaves, spruce needles, sphagnum moss, and bulk samples of grass were found to contain 0.01-0.1 mg Cl org g À1 (d.w.) (Asplund 1995). These studies indicate that the concentration of Cl org varies among plants and it is likely that the concentration also varies among different types of plant tissues within the same plant (e.g.…”

Section: Org In Biomassmentioning

confidence: 94%

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The Role of Organic-matter-bound Chlorine in the Chlorine Cycle: A Case Study of the Stubbetorp Catchment, Sweden

et al. 2005

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The objective of this study is to construct a balanced chlorine budget for a small forested catchment, focusing on the interaction between chloride (Cl inorg ) and organic-matter-bound chlorine (Cl org ). Data from the actual catchment are combined with secondary data from other sites to elucidate more clearly which parts of the cycle are fairly well known and which are more or less unknown. The budget calculations show that the principal input and output fluxes of Cl in the catchment are inorganic but that the main pool is Cl org in the soil. In addition, the budget calculations suggest that a considerable portion of Cl inorg in soil is transformed to Cl org and subsequently leached to deeper soil layers, that net mineralization of Cl org takes place in soil, preferably in deeper soil layers, and that degrading organic matter is a major source of Cl inorg in runoff. The loss of Cl org through runoff is small to negligible in relation to other fluxes. It appears as if dry deposition of Cl inorg is at risk of being underestimated if Cl inorg is assumed to be conservative in soil. The pool of organic-matter-bound chlorine in soil is considerably larger than the annual flux of chloride through the system. The estimates suggest that the amount of Cl org in the upper 40 cm of the soil at the investigated site is approximately twice as large as the Cl inorg . Furthermore, the amount of Cl org biomass is small in relation to the occurrence of Cl org in soil. Finally, the estimates indicate that the transport of volatile Cl org from the soil to the atmosphere may influence the chlorine cycle.

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Section: Org In Biomassmentioning

confidence: 71%

Section: Org In Biomassmentioning

confidence: 94%

The Role of Organic-matter-bound Chlorine in the Chlorine Cycle: A Case Study of the Stubbetorp Catchment, Sweden

et al. 2005

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“…It has lately been suggested that chlorine contributes to the decay of forest organic matter and SOM in general. These processes were intensively studied and described many times, especially for coniferous forest (Asplund et al 1993, 1995, Hjelm et al 1995, 1999, Hoekstra et al 1998, Öberg 1998, Öberg et al 1998a). An anthropogenic source of chloride in the environment is winter road salting in industrial countries; its environmental influence was treated for example by Greenway and Munns (1980), Kozlowski (1997), Orcutt and Nilsen (2000), Fostad and Pedersen (2000), and Norrström and Bergstedt (2001).…”

Section: Biogeochemical Cycling Of Chlorine and Chlorination In The Fmentioning

confidence: 99%

Biogeochemical cycles of chlorine in the coniferous forest ecosystem: practical implications

Matucha¹,

Clarke²,

Lachmanová³

et al. 2010

PLANT SOIL ENVIRON

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Chlorine -one of the most widespread elements on the Earth -is present in the environment as chloride ion or bound to organic substances. The main source of chloride ions is the oceans while organically bound chlorine (OCl) comes from various sources, including anthropogenic ones. Chlorinated organic compounds were long considered to be only industrial products; nevertheless, organochlorines occur plentifully in natural ecosystems. However, recent investigations in temperate and boreal forest ecosystems have shown them to be products of biodegradation of soil organic matter under participation of chlorine. It is important to understand both the inorganic and organic biogeochemical cycling of chlorine in order to understand processes in the forest ecosystem and dangers as a result of human activities, i.e. emission and deposition of anthropogenic chlorinated compounds as well as those from natural processes. The minireview presented below provides a survey of contemporary knowledge of the state of the art and a basis for investigations of formation and degradation of organochlorines and monitoring of chloride and organochlorines in forest ecosystems, which has not been carried out in the Czech Republic yet.

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“…Microorganisms appear to mediate both the formation of Cl-containing SOM and the degradation of organic substances containing Cl during decomposition (Öberg 1998;Johansson et al 2000), so both processes coexist (Asplund 1995;Öberg 2002). The soil pool of chlorinated organic compounds is thus a result of the balance between these processes.…”

Section: Formation Of Chlorinated Organic Substances In Soilmentioning

confidence: 98%

The formation and fate of chlorinated organic substances in temperate and boreal forest soils

Clarke¹,

Fuksová

Gryndler

et al. 2008

Environ Sci Pollut Res

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More work is necessary in order to understand and, if necessary, develop strategies for mitigating the environmental impact of OCls in temperate and boreal forest soils. This includes both intensified research, especially to understand the key processes of formation and degradation of chlorinated compounds, and monitoring of the substances in question in forest ecosystems. It is also important to understand the effect of various forest management techniques on OCls, as management can be used to produce desired effects.

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Origin and occurrence of halogenated organic matter in soil

Cited by 19 publications

References 13 publications

The Role of Organic-matter-bound Chlorine in the Chlorine Cycle: A Case Study of the Stubbetorp Catchment, Sweden

The Role of Organic-matter-bound Chlorine in the Chlorine Cycle: A Case Study of the Stubbetorp Catchment, Sweden

Biogeochemical cycles of chlorine in the coniferous forest ecosystem: practical implications

The formation and fate of chlorinated organic substances in temperate and boreal forest soils

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