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Huan Jing Ke Xue

Title:		[Influence of exogenous sulfur-containing compounds on the exchange fluxes of volatile organic sulfur compounds]
Author(s):		Yi ZG; Wang XM;
Address:		"State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. zgyi@fjau.edu.cn"
Journal Title:		Huan Jing Ke Xue
Year:		2011
Volume:		32
Issue:		8
Page Number:		2236 - 2239
DOI:
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"The influences of cysteine, sodium sulfide (Na2S) and sodium sulfate (Na2SO4) on the soil-air exchange fluxes of volatile organic sulfur compounds (VOSCs), including carbonyl sulfide (COS), dimethyl sulfide (DMS), carbon disulfide (CS2) and dimethyl disulfide (DMDS), were studied employing static chamber enclosure followed by laboratory determination using an Entech 7100 preconcentrator coupled with an Agilent 5973 GC-MSD. The results showed that after the addition of cysteine, the soil for the exchange fluxes of COS and CS2 shifted to be the source from sink and the emissions of DMS and DMDS increased significant. The emission amount of DMS and CS2 accounted for 89.2% to the total VOSCs after the addition of cysteine, implying that cysteine is an important precursor for DMS and CS2 in the soil. The amount of DMDS accounted for 93.2% to the total sulfur from the soil after addition of Na2S, indicating that Na2S is a key precursor for DMDS. No significant difference of VOSCs fluxes was found between the controlled soil and the soil with addition of Na2SO4, suggesting Na2SO4 was not the direct precursor for VOSCs in soil. VOSCs exchange rates reached the maximum at 6 to 8 days after addition of cysteine. As for addition of Na2S, the maximal emission rates of different VOSCs appeared at different dates, and the dates differed significantly from those after addition of cysteine, implying that the formation process of VOSCs from the soil with addition of Na2S was more complex and different from the soil with addition of cysteine"
Keywords:		Cysteine/chemistry Soil/*analysis Soil Pollutants/analysis/*chemistry Sulfides/analysis/chemistry Sulfur Compounds/analysis/*chemistry Sulfur Oxides/analysis/chemistry Volatile Organic Compounds/*analysis Volatilization;
Notes:		"MedlineYi, Zhi-Gang Wang, Xin-Ming chi Research Support, Non-U.S. Gov't China 2012/05/25 Huan Jing Ke Xue. 2011 Aug; 32(8):2236-9"