Phytotransformation of Perchlorate and Identification of Metabolic Products in Myriophyllum aquaticum

The uptake and transformation of perchlorate in the presence of Myriophyllum aquaticum (parrot-feather) were examined in sand and aqueous treatments with concentrations between 0.2 to 20 ppm. Controls were included without plants to confirm the uptake of perchlorate by parrot-feather. The kinetic da...

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Published inInternational journal of phytoremediation Vol. 1; no. 1; pp. 97 - 107
Main Authors Susarla, Sridhar, Bacchus, Sydney T, Wolfe, N L, McCutcheon, Steven C
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.01.1999
Subjects
Myriophyllum aquaticum
parrot-feather
perchlorate
phytoremediation
phytotransformation
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Summary:The uptake and transformation of perchlorate in the presence of Myriophyllum aquaticum (parrot-feather) were examined in sand and aqueous treatments with concentrations between 0.2 to 20 ppm. Controls were included without plants to confirm the uptake of perchlorate by parrot-feather. The kinetic data followed a first-order reaction mechanism with rate constants ranging from 0.004 to 0.090, resulting in half-lives between 7 to 173 days. Uptake rates were five times higher in aqueous treatments than in sand treatments. The intermediates detected in the plant tissue suggest that perchlorate transformed in a step-wise fashion to form chloride. Accumulation of perchlorate in the plant tissues (1.2 g/kg) suggests that parrot-feather has a high capacity for accumulating this contaminant.
ISSN:1522-6514
1549-7879
DOI:10.1080/15226519908500007