Effect of Soil Aggregates on Oxidant Requirement in Chemical Remediation
15 soils were sampled in the present study to investigate the content of soil organic carbon(SOC)and soil aggre-gates,on the soil oxidant requirement(SOD)that used in the chemical oxidation remediation technology.Alkali-activated sodium persulfate was selected as the oxidant.The result showed that microaggregates(＜250 μm)contained 70％of SOC.A significant positive correlation was found between the value of SOD and the content of SOC of the bulk soil.Furtherly,SOD was positively correlated with SOC content of three different aggregates of soils(2 000～250 μm,250～53 μm and＜53 μm),and the smaller the soil aggregates,the higher the significance value.Therefore,the SOC content,especially which in microag-gregates was the key factor influencing the value of SOD.The results here could be useful for selection of the oxidant dosage and could also promote the efficiency oxidation remediation technology.
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