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KMID : 1024520090180121325
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Journal of the Environmental Sciences
2009 Volume.18 No. 12 p.1325 ~ p.1330
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Isomeric Effects on Volatilization of 1,3-Dichloropropene Fumigant in Soil
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Kim Jung-Ho
Mallavarapu Megharaj
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Abstract
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The fumigant 1,3-dichloropropene (1,3-D) was recently proposed as a direct replacement for methyl bromide (CH3Br) in soil fumigation. This study was conducted to better understand behavior phase partitioning, diffusion and volatilization of 1,3-D as affected by isomer. The Henry’s law constant(KH) of cis-1,3-D and trans-1,3-D was 0.058 and 0.037 at 20℃, respectively. KH of cis form of 1,3-D was higher than that of trans form of 1,3-D. To compare with volatilization of 1,3-D isomer, soil column [70 cm (length)×12 cm (i.d.)] included a shank injection at 30 cm with 300 kg ha-1. Maximum cis-1,3-D and trans-1,3-D concentration reached 57 mg L-1 and 39 mg L-1 at 30 cm depth at 1h after application. Cumulatively, after 10 days, 51.8% and 43.57% of applied cis-1,3-D and trans-1,3-D was emitted via volatilization, respectively. The total losses of cis-1,3-D were significantly greater than that of trans-1,3-D. Finally, cis-1,3-D and trans-1,3-D, such as isomer are dominant of 1,3-D fates in soil.
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KEYWORD
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Fumigan, Ozone-depleting chemical, Isomer, 1, 3-dichloropropene, Phase partitioning, Diffusion, Volatilization
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