| 摘要 |
PROBLEM TO BE SOLVED: To easily remove cadmium at a low cost by placing 'uro' shell; n1 mpndible parts to be treated on soil, adding a prescribed amt. of pyroligneous acid to the 'uro' and putting the soil on the 'uro'. SOLUTION: A container 10 made of concrete having the size meeting the amt. of the guts 14 to be treated is prepd. and the soil 12 is laid on the bottom of this vessel 10. The 'uro' 14 to be treated which are shells and nonedible parts of scallops are charged onto the soil 12 and the pyroligenous acid 16 is added to the 'uro' 14. Further, the soil 18 is out on the 'uro' 14. At this time, the amt. of the pyrol,ygbwous acid 14 to be added to the 'uro' 14 is specified to 0.5 to 1 liter per 1kg 'uro'. The The aruroβ'' 14 is decomposed to a slushy state and the cadmium incudned in the 'uro' 14 is removed down to the detection threshold or below if the uro is left standing for a prescribed time. Namely, the bacteria propagate in the soil 12, 18 laid above and below the uro 14, by which the 'uro' 14 is decomposed and the cadmium is removed. |
