| 摘要 |
PURPOSE: A purifying method of arsenic contaminated soil is provided to reduce energy cost by improving purification effect and controlling the temperature of a thermoreleasing process. CONSTITUTION: A purifying method of arsenic contaminated soil includes the following steps: arsenic contaminated soil is thermoreleased under a temperature of 300-400 Deg C; and the thermoreleased soil is washed using a chemical extractor under the alkali condition of pH 12.5-14. In the thermoreleasing process, the heating operation is implemented for 10-30 minutes. In washing process, the temperature condition is between 20 and 80 deg C. The chemical extractor is NaOH. [Reference numerals] (AA, BB) Arsenic concentration; (CC, DD) Removal efficiency; (EE) Contaminated oil; (FF) Thermal desorption+washing; (GG) Treatment process
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