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 in | International journal of phytoremediation Vol. 1; no. 1; pp. 97 - 107 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Taylor & Francis Group
01.01.1999
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Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 1522-6514 1549-7879 |
DOI: | 10.1080/15226519908500007 |