| abstract |
The invention discloses a catalyst-loaded organic-contaminated soil thermal desorption circulating medium and a preparation method thereof. Microporous ceramics are used as a circulating body, and a 5-20% Co-Ca-K@Fe 3 O 4 catalyst is loaded. The calcium potassium cobalt composite oxide is the catalytic active component, the citric acid is the carrier complexing agent, the nano ferric oxide particles are the carrier, and the sodium lauryl sulfate is the circulating medium dispersant. Based on the quality of the carrier, the mass percentage of the catalytically active components is 5% to 15%. The iron salt, citric acid and active component precursor solution are added into the polytetrafluoroethylene hydrothermal reaction kettle, and the Co-Ca-K@Fe 3 O 4 catalyst is prepared by hydrothermal, drying and roasting. The circulating medium can simultaneously catalyze and oxidize organic pollutants in the process of soil thermal desorption, decompose them into water, carbon dioxide, etc., and release heat, and can be recycled during the thermal desorption process; after a period of use, the thermal medium will It is worn and broken, and the catalytic material also loses its activity and decomposes into calcium oxide, potassium salt and other beneficial components that can improve the soil. |