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Evaluation of the Macroalga, Muskgrass, for the Phytoremediation of Selenium-Contaminated Agricultural Drainage Water by Microcosms

^a Dep. of Plant and Microbial Biology, University of California, 111 Koshland Hall, Berkeley, CA 94720-3102
^b Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, MS 69, 2575 Sand Hill Road, Menlo Park, CA 94025-7015

View larger version (23K): [in a new window]   Fig. 1. Percentage of Se mass removed daily from the Se input by the wetland microcosms during the study period. Data shown are means of three replicates.

View larger version (22K): [in a new window]   Fig. 2. Changes of Se volatilization with time from the wetland microcosms over the 24-d experimental period. Data shown are means and standard deviation (n = 3).

View larger version (12K): [in a new window]   Fig. 3. Kinetics of Se accumulation in muskgrass tissues. Data shown are means and standard deviation (n = 5).

View larger version (24K): [in a new window]   Fig. 4. Selenium K near-edge X-ray adsorption spectra of muskgrass supplied with selenate or selenite (A), compared with the four selenium standards (B). SeMet, selenomethionine; RSeSeR, selenocysteine.

View larger version (23K): [in a new window]   Fig. 5. Selenium volatilization by muskgrass treated with 1.58 µg L-1 of selenate or selenite during a 5-d study. Data shown are means and standard deviation (n = 5).