PMID- 21341689
OWN - NLM
STAT- MEDLINE
DCOM- 20110519
LR  - 20161125
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 45
IP  - 6
DP  - 2011 Mar 15
TI  - Reactive films for mitigating methyl bromide emissions from fumigated soil.
PG  - 2317-22
LID - 10.1021/es103713k [doi]
AB  - Emissions of methyl bromide (MeBr) from agricultural fumigation can lead to 
      depletion of the stratospheric ozone layer, and so its use is being phased out. 
      However, as MeBr is still widely used under Critical Use Exemptions, strategies 
      are still required to control such emissions. In this work, novel reactive films 
      (RFs) were designed and their efficacy in limiting loss of MeBr from soil was 
      tested. A reactive layer, containing dry ammonium thiosulfate (ATS), was 
      sandwiched between two layers of plastic film, the lower layer being HDPE 
      (high-density polyethylene film, which is permeable to MeBr) and the upper layer 
      HDPE or VIF (virtually impermeable film). MeBr diffusion through, and 
      transformation by, the RFs were tested in a stainless-steel permeability cell. 
      Although ineffective when dry, the RFs substantially depleted MeBr when activated 
      with water to produce ATS solution. MeBr half-life (t(1/2)) was around 9.0 h at 
      20  degrees C in the presence of activated RF, and was sensitive to temperature (t(1/2) 
      15.7 and 2.9 h at 10 and 40  degrees C, respectively). When the upper film layer was VIF, 
      less than 0.15% of the added MeBr diffused through the film, with the remainder 
      being transformed within the reactive layer. These findings indicate that such 
      films have good potential to reduce MeBr loss from fumigated soils to the 
      atmosphere.
FAU - Xuan, Richeng
AU  - Xuan R
AD  - USDA-ARS, Salinity Laboratory, 450 West Big Springs Road, Riverside, California 
      92507, United States.
FAU - Ashworth, Daniel J
AU  - Ashworth DJ
FAU - Luo, Lifang
AU  - Luo L
FAU - Yates, Scott R
AU  - Yates SR
LA  - eng
PT  - Journal Article
DEP - 20110222
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Air Pollutants)
RN  - 0 (Hydrocarbons, Brominated)
RN  - 0 (Pesticides)
RN  - 0 (Plastics)
RN  - 0 (Thiosulfates)
RN  - 9V42E1Z7B6 (methyl bromide)
RN  - BKH1729645 (ammonium thiosulfate)
SB  - IM
MH  - Air Pollutants/*chemistry
MH  - Air Pollution/prevention & control
MH  - Environmental Restoration and Remediation/*methods
MH  - Fumigation
MH  - Hydrocarbons, Brominated/*chemistry
MH  - Pesticides/*chemistry
MH  - Plastics/*chemistry
MH  - Thiosulfates/*chemistry
EDAT- 2011/02/24 06:00
MHDA- 2011/05/20 06:00
CRDT- 2011/02/24 06:00
PHST- 2011/02/24 06:00 [entrez]
PHST- 2011/02/24 06:00 [pubmed]
PHST- 2011/05/20 06:00 [medline]
AID - 10.1021/es103713k [doi]
PST - ppublish
SO  - Environ Sci Technol. 2011 Mar 15;45(6):2317-22. doi: 10.1021/es103713k. Epub 2011 
      Feb 22.