Abstract
ABSTRACT A new type of chemical oxidation technology utilizing micro bubble ozone oxidizer and a pneumatic fracturing equipmentwas developed to enhance field applicability of a traditional chemical oxidation technology using hydrogen peroxide as anoxidizer for in-situ soil remediation. To find an efficient way to dissolve gaseous ozone into hydrogen peroxide, ozone wasinjected into water as micro bubble form then dissolved ozone concentration and its duration time were measured comparedto those of simple aeration of gaseous ozone. As a result, dissolved ozone concentration in water increased by 31%(1.6 ppm → 2.1 ppm) and elapsed time for which maximum ozone concentration decreased by half lengthened from 9 min to33 min. When the developed pneumatic fracturing technology was applied in sandy loam, cracks were developed and grownin soil for 5~30 seconds so that the radius of influence got longer by 71% from 392 cm to 671 cm. The remediation systemusing the micro bubble ozone oxidizer and the pneumatic fracturing equipment for field application was made anddemonstrated its remediation efficiency at petroleum contaminated site. The system showed enhanced remediation capacitythan the traditional chemical oxidation technology using hydrogen peroxide with reduced remediation time by about 33%.Key words :Micro bubble ozone oxidizer, Pneumatic fracturing, In-situ chemical oxidation, Field demonstration,Radius of influence
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