Effect of In-Situ Oxidation Method on Soil Biological Properties in Total Petroleum Hydrocarbon Contaminated Soil

초록

Total petroleum hydrocarbon (TPH) is one of the main pollutant in soil environment and oxidation treatmentmethod using hydrogen peroxide (H2O2) is common for TPH remediation in soil. The main objective of thisresearch was to monitor change of soil biological properties including soil respiration (SR) and soil enzymeactivity in TPH contaminated soil after oxidation treatment. Laboratory batch experiment was conducted tosimulate field treatment. Five percent of H2O2 was applied to TPH contaminated soil and soil biological propertieswas monitored at 3, 7, and 11 days after H2O2 application. Result showed that reduction efficiency ofTPH was 64.8% after 11 days and SR rate was increased to 58.4% as TPH was reduced to 64.8% after 11 days. However, soil enzyme activity was not significantly increased and even dehydrogenase and urease activitywere decreased to 59.0 and 56.3% after H2O2 application. This result might indicate that certain period isnecessary to recover nutrient cycle in soil after remediation. In addition, long time of monitoring might benecessary to understand microbial activity for nutrient utilization in soil.

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