Spatial variation in natural formation of chloroform in the soils of four coniferous forests

dc.creatorAlbers, CN
dc.creatorJacobsen, OS
dc.creatorFlores, EMM
dc.creatorPereira, JSF
dc.creatorLaier, T
dc.date2011
dc.dateAPR
dc.date2014-07-30T18:43:35Z
dc.date2015-11-26T17:49:48Z
dc.date2014-07-30T18:43:35Z
dc.date2015-11-26T17:49:48Z
dc.date.accessioned2018-03-29T00:32:55Z
dc.date.available2018-03-29T00:32:55Z
dc.identifierBiogeochemistry. Springer, v. 103, n. 41699, n. 317, n. 334, 2011.
dc.identifier0168-2563
dc.identifierWOS:000287750100020
dc.identifier10.1007/s10533-010-9467-9
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/72028
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/72028
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1289489
dc.descriptionNatural chloroform in soil gas below four coniferous forest sites was studied. High concentrations were found within narrow areas-Hot Spots-varying from similar to 25 to > 400 m(2) in size, with chloroform concentrations being typically 20-100 times those in corresponding Low Spots.Attempts to localize Hot Spots by visual inspection with regard to type and density of vegetation failed. Possible differences between Hot and Low Spots could be emission, leaching or degradation of chloroform. However, emissions of chloroform from Hot Spots were similar to 10 times higher than from Low Spots and similarly the chloroform concentration in groundwater below a Hot Spot was similar to 10 times higher than below the corresponding Low Spot. No differences in chloroform mineralization rates were observed between sites and incubation of soil cores confirmed a larger net formation of chloroform in the Hot Spots. Various soil parameters were measured in order to compare the soil sampled from Hot and Low Spots. The halogenation degree of organic soil samples was in the same range, although slightly higher in the H-horizon of the Hot Spot. The chloroform formation potential of the soil organic matter showed differences between soil horizons but not between sites. The high levels of chloroform in the Hot Spots are probably best explained by differences in chloroform forming activity caused by an uneven distribution of yet unidentified microorganisms, since differences in soil organic matter quality and in emission, leaching and degradation of chloroform as well as a number of additional soil parameters could be completely ruled out.
dc.description103
dc.description41699
dc.description317
dc.description334
dc.descriptionDanish Agency for Science, Technology and Innovation [09-061119/FTP]
dc.descriptionDanish Agency for Science, Technology and Innovation [09-061119/FTP]
dc.languageen
dc.publisherSpringer
dc.publisherDordrecht
dc.publisherHolanda
dc.relationBiogeochemistry
dc.relationBiogeochemistry
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjectNatural chloroform
dc.subjectNatural organohalogens
dc.subjectSoil
dc.subjectSpatial variation
dc.subjectFlux
dc.subjectForest
dc.subjectOrganically Bound Halogens
dc.subjectMicrowave-induced Combustion
dc.subjectClosed Vessels
dc.subjectUnited-states
dc.subjectFungi
dc.subjectChlorine
dc.subjectFluxes
dc.subjectWater
dc.subjectAir
dc.subjectTrihalomethanes
dc.titleSpatial variation in natural formation of chloroform in the soils of four coniferous forests
dc.typeArtículos de revistas


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