Laboratory Evaluation of the Efficacy of Chlorine Dioxide (ClO2) Composite Powder for Remediation of Petroleum Hydrocarbon-Contaminated Soils

The evaluation of efficacy of ClO 2 composite powder as a chemical oxidant for remediating petroleum hydrocarbon in soils has been explored.The main purpose of this study is to investigate the oxidative degradation capacity of ClO 2 and the resulting effects on soil chemistry.The most economical dosage was a ratio of 1g product:27g of contaminated soil.Destruction efficiency in the samples ranged from 7 to 41%.Decrease in soil samples pH ranged from 0.08 to 0.80 and 0.04 to 1.01, respectively.Increasing trend in hydrocarbon degradation was 1. The degradation mechanism of the hydrocarbon constituents was postulated to occur in two stages.The first fast-reaction stage involves ClO 2 (aq) in initial electron transfer and in the second-stage, the generation of hypochlorous acid (HOCl) and itself partially dissociates, forming hypochlorite anion, ClO -, which would recurrently react with the soil contaminants.SAR values remained unchanged relative unchanged.SO 4 -2 level increases in all samples due to oxidative transformations of sulfur containing compounds by ClO 2 .Soil EC rises as ClO 2 dosage increased and was attributed to higher levels of Cl -and SO 4 -2. As a direct benefit, SO 4-2 provides a source of nutrient fertilizer in the soil for plants.