Phytotransformation of Perchlorate and Identification of Metabolic Products inMyriophyllum aquaticum
作者:
Sridhar Susarla,
SydneyT Bacchus,
NL Wolfe,
StevenC McCutcheon,
期刊:
International Journal of Phytoremediation
(Taylor Available online 1999)
卷期:
Volume 1,
issue 1
页码: 97-107
ISSN:1522-6514
年代: 1999
DOI:10.1080/15226519908500007
出版商: Taylor & Francis Group
关键词: Myriophyllum aquaticum;parrot-feather;perchlorate;phytotransformation;phytoremediation
数据来源: Taylor
摘要:
The uptake and transformation of perchlorate in the presence ofMyriophyllum 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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