Enhanced Degradation of 2,4,6-Trinitrotoluene (TNT) in a Soil Column Planted with Indian Mallow : Abutilon avicennae(ENVIRONMENTAL BIOTECHNOLOGY)

概要

論文の詳細を見る
Phytoremediation of soil contaminated with 2,4,6-trinitrotoluene (TNT) was studied by growing Indian mallow (Abutilon avicennae) in a soil column reactor with 2kg of TNT contaminated soil (120mgTNT/kg) in the top and 18kg of uncontaminated soil in the bottom. After 50d, TNT remaining in the column with Indian mallow was 23.2% of the initial TNT, while 48.1% of the initial TNT remained in the column without Indian mallow. In the TNT contaminated column, the growth of Indian mallow decreased by 32.4% in roots and 34.3% in shoots on a dry weight basis, respectively, compared to the uncontaminated column. However, critical symptoms such as chlorosis and leaf loss were not observed. Of the 76.8% of the TNT that disappeared in the planted column, less than 0.2% of initial TNT was recovered in the shoot and root extracts of Indian mallow. TNT transformation products in plants include unidentified polar intermediates and amino-dinitrotoluenes. The results showed that planting Indian mallow in TNT contaminated soil enhanced TNT reduction both by stimulating microbial activity that enhances microbial TNT transformation, and by direct uptake and phytotransformation of TNT.
社団法人日本生物工学会の論文
2004-02-25