Evaluation of accelerated dechlorination of p,p'-DDT in acidic paddy soil.
The reductive dechlorination and behavior of p,p'-dichlorodiphenyltrichloroethane (p,p'-DDT) was investigated in a paddy soil. Treatment with 5% (w/w) metallic iron (Fe(0)) resulted in sharp decrease of p,p'-DDT, whereas there was no extra effect when 2% (w/w) aluminum sulfate (Al(2)(SO(4))(3)) was added to the Fe(0) treatment. These results suggest that Fe(0) could effectively promote the reductive dechlorination of p,p'-DDT and its metabolites while Al(2)(SO(4))(3) did not show any effect on those processes. Furthermore, p,p'-DDT and its daughter compounds inhibited holistic soil respiration greatly at first but could be metabolized by certain species of indigenous microorganisms after a period of adaptation time in the soil. When treated with Fe(0), the polluted soil produced much less CO(2) while the addition of Al(2)(SO(4))(3) counteracted its negative effect to much extent.
Yao
F X
FX
Institute of Soil Science, Soil Chemistry and Environment, Chinese Academy of Sciences, Nanjing 210008, China.
Jiang
X
X
Yu
G F
GF
Wang
F
F
Bian
Y R
YR
D000383:Agriculture; D000534:Alum Compounds / Q000737:chemistry; D001673:Biodegradation, Environmental; D002245:Carbon Dioxide / Q000737:chemistry; D002681:China; D003634:DDT / Q000032:analysis*; D007501:Iron / Q000737:chemistry; D012987:Soil / Q000592:standards*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis*
D000534:Alum Compounds; D012987:Soil; D012989:Soil Pollutants; D002245:Carbon Dioxide; C041524:aluminum sulfate; D003634:DDT; D007501:Iron