Abstract
An understanding of detailed kinetic of CO 2 removal by plants can lead to an effective design of the phytoremediation process for anthropogenic CO 2 reduction. This study examines the CO 2 removal rates of five wetland plants ( Cyperus alternifolius, Dracaena fragrans, Iris ensata, Iris setosa and Thalia dealbata) by using saturation reaction and first-order reaction kinetic equations. It was determined that the elevation of CO 2 levels stimulated the plant-CO 2 uptake rate. The maximum CO 2 removal rates ( k) of plants were found to range between 0.76 and 1.21 g m −2 h −1. The magnitude of first-order kinetic coefficient of plants ( k′) had a close relationship with CO 2 level at half-velocity ( K). For consistency, the same kinetics were applied to the continuous flow experiment. A saturation kinetic approach was well suited to estimate the removal rate of CO 2 in continuous flow system, while a first-order kinetic approach was limited to inflow CO 2 levels below 500 ppm.
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