활성 적니를 이용한 해수중의 인 흡착 특성

• Published in: 한국수처리학회지, 21(5) pp. 69 - 77
• Main Author: 김이태
• Format: Journal Article
• Language: Korean
• Published: 한국수처리학회 30.10.2013
• Subjects: 토목공학
• ISSN: 1225-7192; 2289-0076

The objective of this study was to obtain basic information about phosphate adsorption by activated red mud(ARM)in sea water. The selective adsorption of phosphate ions from artificial sea water was examined along with other commercial adsorbents(Phosphate-outⓇ(Germany, EHEIM Company), PhosBanⓇ(USA, Two-little fish Company)). According to the application of the activated red mud, the influence of pH and alkalinity were observed which is in the hands of the stability problem during the application of adsorbent was verified. Activated red mud analysis mainly Ca, Fe, Al, Si, and Mg as the complex was composed and the state mineral Hematite (Fe2O3) and Calcite (Ca(CO3)) were identified as valid for phosphate adsorption with Gibbsite (Al(OH)3), Brucite (Mg3(OH)6), Portlandite (Ca(OH)2) respectively. Activated red mud for phosphate removal in seawater was 80% (initial phosphate concentration of 1mg / L condition). It was a higher value than the commercial product (Phosphate-outTM: 68%, PhosBanTM: 71%). In seawater by activated red mud for phosphate adsorption was 0.8mgPO42—P/g(activated red mud). pH variation of the activated red mud phosphate adsorption capacity was sensitive to the pH change and the phosphate adsorption capacity at the range of pH> 4 or less was higher than in natural seawater pH range from 7.5 to 8.5 range, the relative phosphate adsorption capacity dropped significantly. Under the current conditions for the removal of phosphate in sea water of the appropriate dosage of the activated red mud 0.8 - 1.0g / L had a fair value of infusion conditions. Also, activated red mud secondary leaching of hazardous substances do not occur in water from dissolution experiments. KCI Citation Count: 0