금속첨착 황토복합체를 이용한 인 제거에 관한 연구

Abstract

The aim of this study was to evaluate the composites of Loess-Ca-Al which were developed for removing orthophosphate(PO43--P) in lake or reservoir. The experimental results clearly showed that the PO43--P removal was more facilitated by the addition of the composites compared to by the addition of Loess itself. Also, an increase in their amounts caused the increased PO43--P removal although it was observed that their ability for phosphorus removal was somewhat different(PO43--P removal efficiency by Loess-Ca-Al was better than that by Loess-Ca). The chemical mechanism of PO43--P removal for Loess-Ca-Al was based on Freundlich and Langmuir isotherm equation, respectively. The optimum pH range for PO43--P removal was pH 5∼8 in both composites. It indicated that the composites proposed in this study could effectively work in natural water system. It was also interesting to observe the Loess-Ca-Al ability of the composites, on which Ca and Al was by distilled water, and their adsorption ability of PO43--P. It was concluded that the Loess-Ca-Al proposed in this study can be used as effective adsorbents for removing PO43--P in lake or reservoir. Accordingly, the Loess Complex Impregnated Metal is efficient in the removal of phosphate from aqueous system.