Column Testing Device to Evaluating Field Applicability of Stabilization Agents for Paddy Soil contaminated by Heavy Metals

摘要

The present invention relates to a column testing device for examining the field applicability of a stabilizer for rice paddy soil contaminated with heavy metals. The present invention includes: a column testing device main body that has an open upper surface, has a certain height, is formed by either transparent reinforced acryl or opaque reinforced acryl being selected, and has multiple soil water collector insertion ports formed at regular intervals in its side wall surface along a length direction; a first opening and closing valve disposed in an upper region of the side wall of the column testing device main body and disposed such that a fresh water level in the column testing device main body can be adjusted; a second opening and closing valve disposed in a lower region of the side wall of the column testing device main body and disposed such that leachate in the column testing device main body can be regulated; a stopper opening and closing the soil water collector insertion port; an Eh measuring instrument fixing tool disposed in an airtight manner in the opening; a platinum electrode with a lower end portion positioned in contaminated soil and a counter electrode with a lower end portion positioned in fresh water disposed in a penetrating manner at a predetermined distance from the Eh measuring instrument fixing tool; and a soil water collector inserted into the soil water collector insertion port and collecting soil water in the column testing device main body. The present invention provides a technique that can be applied to the restoration (stabilization) of soil contaminated with heavy metals. In addition, the present invention is very timely and facilitates the dissemination of the technique in view of an ongoing increase in demand for the verification of stabilizer effects in rice paddy soil restoration environments.