Bench-Scale Flushing Experiments for Remediation of Hg-Contaminated Groundwater
Table 3
Column properties.
Column
SS-DI
PA-DI
PA-TW
LA-DI1
LA-DI2
LA-TW
Sediment
Silica sand (SS)
Perched aquifer (PA)
Perched aquifer (PA)
Lower aquifer (LA)
Lower aquifer (LA)
Lower aquifer (LA)
Source water
Deionized water (DI)
Deionized water (DI)
Treated water (TW)
Deionized water (DI)
Deionized water (DI)
Treated water (TW)
Mass of sediment (kg)
3.52
5.35
5.73
5.26
5.43
5.70
Estimated pore water volume (cm3)
1000
800
835
835
835
Porosity
0.30
0.34
0.27
0.29
0.29
0.29
Elapsed
26
26
26
26
26
26
Cumulative pore volume (PV) flushed
16.30
10.72
10.63
10.96
10.94
10.51
was only half filled with silica sand; thus pore volume is less than other columns. elapsed days 16 and 17, pumping was stopped for the duration of 18 days. Thus, the total column operation period was 26 + 18 = 44 days.