2008
WHICH FACTORS AFFECT THE FATE OF CHIRAL PERSISTENT ORGANIC POLLUTANTS IN THE TERRESTRIAL ECOSYSTEM?
KOBLIŽKOVÁ, Martina, Jana KLÁNOVÁ, Ladislav DUŠEK, Jakub HOFMAN, Thomas BUCHELI et. al.Základní údaje
Originální název
WHICH FACTORS AFFECT THE FATE OF CHIRAL PERSISTENT ORGANIC POLLUTANTS IN THE TERRESTRIAL ECOSYSTEM?
Název česky
WHICH FACTORS AFFECT THE FATE OF CHIRAL PERSISTENT ORGANIC POLLUTANTS IN THE TERRESTRIAL ECOSYSTEM?
Autoři
KOBLIŽKOVÁ, Martina (203 Česká republika), Jana KLÁNOVÁ (203 Česká republika, garant), Ladislav DUŠEK (203 Česká republika), Jakub HOFMAN (203 Česká republika) a Thomas BUCHELI (756 Švýcarsko)
Vydání
Organohalogen Compounds, 2008, 1026-4892
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10511 Environmental sciences
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14310/08:00027896
Organizační jednotka
Přírodovědecká fakulta
Klíčová slova anglicky
Chiral analysis; degradation; enentiomer; GC MS
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 8. 4. 2009 12:49, Mgr. Martina Kobližková, 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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