2008
Can physicochemical and microbial soil properties explain enantiomeric shifts of chiral organochlorines?
KOBLIŽKOVÁ, Martina, Ladislav DUŠEK, Jiří JARKOVSKÝ, Jakub HOFMAN, Thomas BUCHELI et. al.Základní údaje
Originální název
Can physicochemical and microbial soil properties explain enantiomeric shifts of chiral organochlorines?
Název česky
Mohou fyzikálně-chemické vlastnosti půd vysvětlit enantiomerní posuny u chirálních organochlorových látek?
Autoři
KOBLIŽKOVÁ, Martina (203 Česká republika), Ladislav DUŠEK (203 Česká republika), Jiří JARKOVSKÝ (203 Česká republika), Jakub HOFMAN (203 Česká republika), Thomas BUCHELI (756 Švýcarsko) a Jana KLÁNOVÁ (203 Česká republika, garant)
Vydání
Environmental Science & Technology, USA, The American Chemical Society, 2008, 0013-936X
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10511 Environmental sciences
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 4.458
Kód RIV
RIV/00216224:14310/08:00027891
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000258439600025
Klíčová slova česky
ATROPISOMERIC POLYCHLORINATED-BIPHENYLS; MULTIDIMENSIONAL GAS-CHROMATOGRAPHY; HUMAN-MILK SAMPLES; ENANTIOMER FRACTIONS; MASS-SPECTROMETRY; PESTICIDES; RATIOS; BIOMASS; AIR; DEGRADATION
Klíčová slova anglicky
ATROPISOMERIC POLYCHLORINATED-BIPHENYLS; MULTIDIMENSIONAL GAS-CHROMATOGRAPHY; HUMAN-MILK SAMPLES; ENANTIOMER FRACTIONS; MASS-SPECTROMETRY; PESTICIDES; RATIOS; BIOMASS; AIR; DEGRADATION
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 25. 6. 2009 10:17, prof. RNDr. Luděk Bláha, Ph.D.
V originále
Enantiomeric fractions (EF) of PCB 95, 132, 149, and 174, alpha-HCH, o,p'-DDD, and o,p'-DDT were analyzed in 112 soil samples using two-dimensional gas chromatography and triple-quadrupole mass spectrometry. To assess the soil conditions that facilitate enantioselective fractionation of chiral compounds, EF values of selected PCBs were further correlated with a wide range of physicochemical and microbial soil parameters in an attempt to identify the influential factors and their mutual relations. It was evident that soils where nonracemic ratios of investigated compounds were found were more carbon rich but they also contained significantly more humic and fulvic acids and total nitrogen. These specific physicochemical properties were accompanied by significantly increased values of all key biotic variables, the amount of microbial biomass, and its respiration activity (both basal and substrate-induced). Therefore, the shifts from racemic ratios appeared to be associated with more sustainable and active soil microflora. Among other abiotic characteristics, most significant differences were detected in the soil texture. Soil samples with significant shifts contained increased amount of clay component and correspondingly decreased proportion of sand fraction. These differences can also be associated with more intensive microbial activity, because clay content and texture with an increased amount of microaggregates are known to be favorable for soil microflora and its viability.
Česky
Enantiomeric fractions (EF) of PCB 95, 132, 149, and 174, alpha-HCH, o,p'-DDD, and o,p'-DDT were analyzed in 112 soil samples using two-dimensional gas chromatography and triple-quadrupole mass spectrometry. To assess the soil conditions that facilitate enantioselective fractionation of chiral compounds, EF values of selected PCBs were further correlated with a wide range of physicochemical and microbial soil parameters in an attempt to identify the influential factors and their mutual relations. It was evident that soils where nonracemic ratios of investigated compounds were found were more carbon rich but they also contained significantly more humic and fulvic acids and total nitrogen. These specific physicochemical properties were accompanied by significantly increased values of all key biotic variables, the amount of microbial biomass, and its respiration activity (both basal and substrate-induced). Therefore, the shifts from racemic ratios appeared to be associated with more sustainable and active soil microflora. Among other abiotic characteristics, most significant differences were detected in the soil texture. Soil samples with significant shifts contained increased amount of clay component and correspondingly decreased proportion of sand fraction. These differences can also be associated with more intensive microbial activity, because clay content and texture with an increased amount of microaggregates are known to be favorable for soil microflora and its viability.
Návaznosti
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