PMID: 16646481May 2, 2006Paper

Reducing 1,3-dichloropropene emissions from soil columns amended with thiourea

Environmental Science & Technology
Wei ZhengQ Wang

Abstract

Soil fumigants are becoming an important source of volatile organic compounds (VOCs) in air, especially in some agricultural areas. In this study, we used thiourea to construct a reactive surface barrier (RSB) at the soil surface for reducing 1,3-dichloropropene (1,3-D) volatilization. The agrochemical thiourea could rapidly transform volatile 1,3-D to nonvolatile products via an SN2 nucleophilic substitution reaction. A catalytic mechanism in thiourea-amended soil facilitated the conversion process. A packed soil column system was employed to investigate the emissions and distribution of 1,3-D and optimize the original fumigant emission-reduction strategy. Volatilization of 1,3-D from the soil surface was significantly reduced in columns amended with a thiourea RSB compared with that of bare soil. Volatilization flux and cumulative emissions decreased with increasing thiourea application rate and increasing fumigation depth in packed soil columns. Surface amendment with the RSB did not affect the subsurface distribution of 1,3-D in the soil profile. Combined application of a thiourea RSB and plastic tarps had a synergetic effect in emission control and could eliminate the relatively high fumigant flux that occurs upon tarp dis...Continue Reading

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Citations

Jul 22, 2008·The Science of the Total Environment·Suduan GaoThomas J Trout
May 24, 2015·Journal of Agricultural and Food Chemistry·Scott R YatesIan J van Wessenbeeck
Feb 13, 2008·Journal of Environmental Quality·Suduan GaoSally Schneider
Dec 1, 2017·The Science of the Total Environment·S R Yates, D J Ashworth
Nov 17, 2009·Journal of Agricultural and Food Chemistry·Qiuxia WangAocheng Cao
Sep 13, 2007·Journal of Agricultural and Food Chemistry·Ruijun QinHusein Ajwa
Feb 21, 2008·Environmental Science & Technology·Jason A McDonaldBradley D Hanson

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