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한오형,정대석 조선대학교 동력자원연구소 1997 動力資源硏究所誌 Vol.19 No.1
The factory wastes, polluted air and water by a industrial development have been contaminated our living environment in the change processing to join the ranks of advenced countries. In order to improve this environment using the Makban-stone which known to be useful in human body, the experiment of mineralogical property survey and heavy metal adsorption is done. Summarized results are as follows : 1. The major minerals of the Makban-stone through microscopic survey and X-ray diffraction analysis are quartz, plagioclase, microcline, amphibole, and biotite : minor minerals are chlorite, epidote, sericite, montmorillonite, and opaque minerals. 2. The Makban-stone is similar to the samples from Japan, according to chemical component survey, and compared with domestic granite, it shows that the content of SiO₂ is low, and the content of Al₂O₃ high. 3. According to the SEM analysis, most of feldspars have so many pores ranging 1∼10μ, and the shape of pores is a cylindrical one ranging 7∼14A˚. The result of an opening volume measurement by particle analysis is shown that the pores have very good structures needed to be adsorpted. 4. Regardless of pH value, it is confirmed that the Makban-stone absorbed heavy metals(Cd^2+, Zn^2+, Pb^2+, Cu^2+, and Cr^6+). 5. The adsorption of heavy metals by the Makban-stone quoted the Freundlich's isotherm equation. A inclination of Pb, Zn, and Cd, by the least-square methods is 0.2, 0.068, and 0.37, but Cr and Cu with inclination more than 2 cannot use for absorbent.