DEVICE AND METHOD FOR DECONTAMINATING SOIL

• Main Authors: ABE HIROKO, MIYAMOTO MASAYA, SEKI HIDEJI, TAJIMA NAOKI, AKAI YOSHIE, NAKAMURA HIDEKI, INOUE YUKI
• Format: Patent
• Language: English; Japanese
• Published: 15.12.2014
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; DECONTAMINATION ARRANGEMENTS THEREFOR; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

PROBLEM TO BE SOLVED: To provide a device and method for decontaminating soil, capable of simply and efficiently decontaminating soil containing radioactive cesium.SOLUTION: A device for decontaminating soil comprises: a processing tank 11 for storing a soil S including radioactive cesium and an eluate including an acid solution L to elute the radioactive cesium into the eluate; an adsorption tower 12 for storing an adsorbent adsorbing the cesium in the eluate; a first pipe line 13 for connecting the processing tank 11 and the water inlet 12A of the adsorption tower 12; a second pipe line 14 for connecting the water outlet 12B of the adsorption tower 12 and the processing tank 11; and a transfer pump 15 interposed in the first pipe line 13 and for circulating the eluate between the processing tank 11 and the adsorption tower 12. A method for decontaminating soil includes circulating the eluate between the processing tank 11 and the adsorption tower 12. 【課題】放射性セシウムを含有する土壌を簡易かつ効率的に除染することのできる土壌除染装置及び方法を提供すること。【解決手段】放射性セシウムを含む土壌Ｓと酸溶液Ｌを含む溶離液とを収容して放射性セシウムを前記溶離液に溶離させる処理槽１１と、前記溶離液中のセシウムを吸着する吸着剤を収容する吸着塔１２と、前記処理槽１１と前記吸着塔１２の入水口１２Ａとを接続する第１の配管１３と、前記吸着塔１２の出水口１２Ｂと前記処理槽１１とを接続する第２の配管１４と、前記第１の配管１３に介装され、前記溶離液を前記処理槽１１と前記吸着塔１２との間で循環させる移送ポンプ１５とを有し、前記処理槽１１と前記吸着塔１２との間で前記溶離液を循環させる土壌除染装置及び方法。【選択図】図１