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Plant Contamination by Organic Pollutants in Phytoremediation

^a Dep. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136
^b Dep. of Horticultural Science, Texas A&M Univ., College Station, TX 77843-2133
^c Dep. of Agricultural Engineering, Texas A&M Univ., College Station, TX 77843-2117

View larger version (14K): [in a new window]   Fig. 1. Schematic of the plant contamination model. (a) Components of the two-compartment plant model. (b) Linkage of the two-compartment plant model to the soil model.

View larger version (18K): [in a new window]   Fig. 2. Temporal variation of (a) contaminat concentration in the root compartment, (b) contaminant concentration in shoot compartment, and (c) total mass of root and shoot.

View larger version (24K): [in a new window]   Fig. 3. The effect of the first-order sorption kinetic rate coefficient s for TNT concentration in (a) root compartment and (b) shoot compartment.

View larger version (20K): [in a new window]   Fig. 4. The effect of the soil organic carbon content foc on TNT concentration in (a) root compartment and (b) shoot compartment, and (c) the effect of the mass transfer rate coefficient between soil and root Knrw on TNT concentration in the root compartment.

View larger version (26K): [in a new window]   Fig. 5. TNT degradation in the plant for various values of (a) the first-order degradation rate coefficient in the root compartment, Krc, and (b) the first-order degradation rate coefficient in shoot compartment Khc.

View larger version (24K): [in a new window]   Fig. 6. The effect of the microbial biomass concentration on TNT concentration in (a) root compartment and (b) shoot compartment, and (c) the temporal variation of microbial concentration.

View larger version (24K): [in a new window]   Fig. 7. The effect of the additional substrate concentration, CI0, on TNT concentration in (a) root compartment and (b) shoot compartment, and (c) the temporal variation of microbial concentration.

View larger version (25K): [in a new window]   Fig. 8. The effect of the maximum specific growth rate, µmax, on TNT concentration in (a) root compartment and (b) shoot compartment.