Disposition of atrazine metabolites following uptake and degradation of atrazine in switchgrass.

Date
2012-12-21
Authors
Albright, Vurtice
Coats, Joel
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Coats, Joel
Person
Research Projects
Organizational Units
Entomology
Organizational Unit
Journal Issue
Series
Abstract

Extensive use of the agricultural herbicide atrazine has led to contamination of numerous ground and surface water bodies. Research has shown that it can have a variety of negative impacts on numerous non-target organisms in the environment. Phytoremediation is one strategy that has been studied to remove atrazine contamination. This paper investigates the hypothesis that switchgrass (Panicum virgatum) can exude metabolites of atrazine after uptake and degradation, which has been suggested by prior research. Pots planted with switchgrass were treated with a 4 ppm solution of atrazine spiked with [14C]atrazine. After 4 days, switchgrass plants were transplanted to new pots with fresh sand. Four days later, the pots were sacrificed, and sand and plant samples were extracted. Plant and sand samples were analyzed for the presence of atrazine and its major metabolites. The percentage of radiotracer remaining as the parent atrazine was observed to decrease over the course of the study while the percentages of the metabolites were observed to increase. The presence of the metabolite cyanuric acid in a switchgrass phytoremediation system is reported for the first time.

Description

This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Phytoremediation on December 21, 2012; 16(1); 62-72, available online: http://www.tandf.com/doi/abs/10.1080/15226514.2012.759528.

Keywords
atrazine, phytoremediation, switchgrass, metabolites
Citation
DOI
Collections