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Phosphate Adsorption of Youngdong Illite, Korea  

Cho, Hyen-Goo (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University)
Park, Ok-Hee (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University)
Moon, Dong-Hyuk (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University)
Do, Jin-Young (School of Cultural Assets, Gyeongju University)
Kim, Soo-Oh (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University)
Publication Information
Journal of the Mineralogical Society of Korea / v.20, no.4, 2007 , pp. 327-337 More about this Journal
Abstract
Mineral compositions were determined using quantitative X-ray diffraction analysis on the three kinds of Youngdong illite consisting of white, yellow and refined yellow samples. Mean particle size and their size distribution patterns were measured by laser particle size analyzer. The characteristics of phosphate adsorption on illite were studied through batch adsorption experiments. The white illite has less illite content, but is finer than that of yellow. The refined yellow illite has more illite content and finer particle size compared with those of raw yellow illite. The adsorption rate of phosphate generally increases when the mass of illite increases, whereas adsorption quantity decreases with ascending pH. The phosphate adsorption usually increases with ascending illite content or descending particle size. Although the white illite has lower illite content than the yellow, the former has higher phosphate adsorption quantity than the latter. This can be ascribed to the fine particle size, high interlayer charge, and low substitution in tetrahedral site of white illite. The adsorption isotherms of white illite are well fitted with the Langmuir equation, however those of yellow one are better with Freundlich equation.
Keywords
Youngdong illite; phosphate adsorption; batch adsorption experiment; Freundlich adsorption isotherm; Langmuir adsorption isotherm;
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Times Cited By KSCI : 2  (Citation Analysis)
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