Chemical characterization of organohalogens in a coniferous forest soil

Hjelm, Olof; Asplund, G.

doi:10.1007/978-94-011-0061-8_8

Cited by 14 publications

(14 citation statements)

References 6 publications

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“…Topsoil samples have been collected from around the world, and the concentration of organic chlorine has been found to vary from a few micrograms per gram to milligram levels (Asplund and Grimvall 1991;Hjelm 1996;Johansson 1996;Johansson 2000;. No samples have so far been reported as having levels below the detection limit (0.4 lg Cl org g À1 , d.w.).…”

Section: Reliability Of Estimatementioning

confidence: 99%

“…It is well documented that chloride participates in a complex biogeochemical cycle (Neidleman and Geigert 1986;Asplund and Grimvall 1991;Grimvall and de Leer 1995;Gribble 1996;Winterton 2000;van Pee 2001; chloride to organic chlorine, that thousands of chlorinated compounds are produced naturally, and that organic-matter-bound chlorine is as abundant as the chloride ion, at least in organic soil (Gribble 1996;Hjelm 1996). Notwithstanding these findings, the biogeochemical cycling of chlorine must still be considered a virgin area of research, as very little is understood of the major sources, sinks, and transport routes as well as of the underlying processes.…”

Section: Introductionmentioning

confidence: 98%

“…In soil, it is present both as chloride ions (Cl inorg ) and as an integrated part of the organic matter, i.e. organically bound (Cl org ) (Hjelm 1996;Johansson 1996;Myneni 2002). The major source of Cl inorg is the oceans, whereas organicmatter-bound chlorine originates from a variety of sources.…”

Section: Introductionmentioning

confidence: 99%

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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: Reliability Of Estimatementioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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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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“…This inorganic form of chlorine was supposed to have low affinity for soil solid phases and was then used as a tracer of water movements (Herczeg et al, 1997). The major chlorine fluxes in the environment corresponded to inorganic chlorine ( € Oberg et al, 2005) but organic chlorine forms, mainly of high molecular weight (Hjelm and Asplund, 1995), are also present in the environment. Anthropogenic activities release various organic chlorine molecules (aliphatic/aromatic) that pose an environmental issue.…”

Section: Introductionmentioning

confidence: 99%

Contribution of microbial activity to formation of organically bound chlorine during batch incubation of forest soil using 37Cl as a tracer

Osswald

Poszwa

Bueno

et al. 2016

Soil Biology and Biochemistry

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“…Y EARS of research have revealed that substantial amounts of naturally formed organic matter-bound chlorine (Cl org ) are present in the terrestrial environment (Asplund and Grimvall, 1991;Field et al, 1995;Gribble, 1996;Harper, 1985;Hjelm, 1996). Furthermore, it has become evident that Cl org is as abundant in soil organic matter as organic phosphorus (Asplund and Grimvall, 1991;Hjelm, 1996) and that Cl org is formed during the degradation of organic matter in soil (e.g., de Jong et al, 1994;Hoekstra and de Leer, 1993;Johansson, 1996;Myneni, 2002;Öberg, 1998).…”

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confidence: 96%

Organic Chlorine in Deciduous and Coniferous Forest Soils in Southern Sweden

2003

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The concentration of organic chlorine (Cl org ) was determined in soil samples collected in the O-horizon in forest soils in southern Sweden to describe differences among stand types and elucidate the influence of chloride (Cl inorg ), pH, and organic carbon. The samples were collected within the Swedish National Survey of Forest Soils and Vegetation, with moraine as the dominating soil type and with granite and gneiss as bedrock. The concentration of organic chlorine (Cl org ) found in the deciduous forest soils was significantly lower than that in the coniferous forest soils. The Cl org increased with Cl inorg , organic carbon content, and decreasing pH but was most strongly correlated to Cl inorg . Crosswise comparisons among the variables showed that the influence of Cl inorg overrode the influence of pH and organic carbon. We concluded that the major driving force in the formation of Cl org in soils is deposition of Cl inorg and that the difference among deciduous and coniferous stands is due primarily to a higher input of Cl inorg in the canopy of coniferous trees as a result of a larger wet and dry deposition in coniferous compared with deciduous forests.The concentration of Cl org decreased significantly from June to August. This follows the pattern of chloride deposition in the region and gives further evidence that Cl inorg is a driving force in the formation of Cl org in soil. The results of the present study gives further evidence that the turnover of Cl org is closely related to the turnover of Cl inorg and that it is necessary to include Cl org in the assessment of the biogeochemical cycling of chlorine in the environment. (Soil Science 2003;168:347-355)

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Chemical characterization of organohalogens in a coniferous forest soil

Cited by 14 publications

References 6 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

Contribution of microbial activity to formation of organically bound chlorine during batch incubation of forest soil using 37Cl as a tracer

Organic Chlorine in Deciduous and Coniferous Forest Soils in Southern Sweden

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