To decompose and clean a harmful material contained in soil and underground water in a solution at an ordinary temperature while preventing the use of a chemical agent and the generation of secondary pollution.
In the harmful material treating method including the first stage in which a harmful material 4 in liquid is adsorbed by an adsorbent 5 incorporated in an absorption tower 6, the second stage in which the harmful material 4 is desorbed from the adsorbent 5 and the third stage in which the harmful material-containing liquid 17 obtained at the second stage is cleaned, and in the third stage, the absorption tower effluent 17 is stored at a water storage tank 9, and the liquid 10 is subjected to cavitation jet 15 by a nozzle 13, and the treated liquid 16 cleaned by the cavitation is sent to the second stage, and in second stage, the harmful material 4 is desorbed from the adsorbent 5 by using the treated liquid 16 to regenerate the adsorbent 5.
SATO KAZUNORI
FUJITA KAZUNORI
