Table 1
Remaining BTEX concentration and toxicity of groundwater at different bioremediation
degree from inlet to outlet at day 35 of the stable duration of the second stage
initiated by addition of both the immobilized bead and ORC.
Item #1 (inlet) #2 #3 #4 (outlet)
Benzene (mg l−1) 26.44 3.07 1.25 0.71
Toluene (mg −1) 26.59 3.57 1.88 1.14
Ethylbenzene (mg l−1) 25.93 4.05 2.27 1.44
Xylene (mg l−1) 26.44 4.12 2.69 2.07
Dilution factor for EC50 of
luminescent inhibition
38.6
±
1.3 28.6
±
3.2 25.4
±
1.8 3.4
±
1.5