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자료유형
학술저널
저자정보
양정하 (한서대학교 환경공학과) 류경원 ((주)피엠알 청정기술전략연구원) 김진호 (강원대학교 삼척공동실험실습관) 이영신 (한서대학교) 고재철 ((주)피엠알 청정기술전략연구원)
저널정보
한국환경기술학회 한국환경기술학회지 한국환경기술학회지 제20권 제4호
발행연도
2019.1
수록면
236 - 242 (7page)

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In this study, the crystallization characteristics of hydroxyl-apatite(HAp) in phosphorus removal by calcined oyster shell powder was invested. Natural oyster shell powder(ROSP) and oyster shell powder calcined at 900℃(COSP) were used in the experiment, and phosphorus removal efficiency, pH variation, FT-IR and XRD of the product were analyzed. The phosphorus removal efficiency of the ROSP and COSP appeared at 8.9% and 85.0% within about 1 minute respectively, and there was no significant change in the removal efficiency for 24 hours. Therefore, it was confirmed that most of the reaction was initially completed. The initial pH of the artificial sample was 6.1, and the pH after the addition of the ROSP and COSP increased rapidly to 7.3 and 11.6, respectively, and maintained steadily for 24 hours. In the FT-IR and XRD analysis of the COSP reaction crystals, intermediate such as di-calcium phosphate di-hydrate(DCPD), and HAp were detected together. From the results, it is judged that calcium hydroxide eluted from the COSP reacts with the phosphorus within a short time to produce intermediate and grows into the HAp crystal over time. Therefore, it is considered that the phosphorus can be removed by the production of intermediate materials in a removal process with a short reaction time.

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