WHICH FACTORS AFFECT THE FATE OF CHIRAL PERSISTENT ORGANIC POLLUTANTS IN THE TERRESTRIAL ECOSYSTEM?

KOBLIŽKOVÁ, Martina, Jana KLÁNOVÁ, Ladislav DUŠEK, Jakub HOFMAN and Thomas BUCHELI. WHICH FACTORS AFFECT THE FATE OF CHIRAL PERSISTENT ORGANIC POLLUTANTS IN THE TERRESTRIAL ECOSYSTEM? Organohalogen Compounds. 2008, vol. 2008, No 1, 200 pp. ISSN 1026-4892.

Basic information

• Original name: WHICH FACTORS AFFECT THE FATE OF CHIRAL PERSISTENT ORGANIC POLLUTANTS IN THE TERRESTRIAL ECOSYSTEM?
• Name in Czech: WHICH FACTORS AFFECT THE FATE OF CHIRAL PERSISTENT ORGANIC POLLUTANTS IN THE TERRESTRIAL ECOSYSTEM?
• Authors: KOBLIŽKOVÁ, Martina (203 Czech Republic), Jana KLÁNOVÁ (203 Czech Republic, guarantor), Ladislav DUŠEK (203 Czech Republic), Jakub HOFMAN (203 Czech Republic) and Thomas BUCHELI (756 Switzerland).
• Edition: Organohalogen Compounds, 2008, 1026-4892.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10511 Environmental sciences
• Country of publisher: United Kingdom of Great Britain and Northern Ireland
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/08:00027896
• Organization unit: Faculty of Science
• Keywords in English: Chiral analysis; degradation; enentiomer; GC MS
• Tags: chiral analysis, degradation, enentiomer, GC MS
• Tags: International impact, Reviewed

Abstract

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.

Abstract (in Czech)

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.

Links

• MSM0021622412, plan (intention): Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)