140

Table 6.4.  Experimental Conditions for Column Tests with Alachlor.

Reactive   Cc     L (cm)d  Pde (Mg/m3)  nf     neg   Iron Content SSAh (m2/L)  Vsi (cmlsec)
Media   (mg/L)                                          (%)
Sand 1    34       42       1.67     0.36     0.36        1          113        3.23x10-
Sand 1a   35       42        1.66     0.47    0.40        11         364        3.23x10-
Sand 2    35       28       1.69     0.33     0.33       0.2         19         3.49x10-
Sand 4    35       28       1.69     0.36     0.36       0.3         34        3.47x10-
Sand 5b   48       30        1.83     0.49    0.40        20         791        2.48x10-
Sand 12   42       15        1.56     0.43    0.36        10         1053       3.74x10-
Iron    20       43        2.07     0.34    0.29        10         624        4.43x10-
Iron     53      42        2.06     0.34    0.29        10         620        4.86x10-
Iron    49       44        1.88     0.40    0.34        10         486        3.30x10-
Iron     50      45        2.14     0.42    0.35        20         1073       2.88x10-
Iron     50      45        1.97     0.38    0.32        10         532        2.43x10
a Admixture with a 10% Peerless Iron, b Admixture with a 20% Peerless Iron, c Influent Alachlor Concentration d
Length of Sample, e Dry Density, f Total Porosity, g Effective Porosity, h Surface Area of Iron per Volume of
Solution, 'Seepage Velocity.