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황필기 ( Pil Gi Hwang ),신인수 ( In Soo Shin ),어명철 ( Myung Cheol Eu ),최철호 ( Chul Ho Choi ),이승목 ( Seung Mok Lee ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.4
N/A The ability of iron coated starfish (ICS) to adsorb heavy metals from aqueous solution was studied with variation of factors, such as starfish dose, pH, single solute, and mixture. It was found that heavy metals removal capacity was significantly increased through iron-coating. The results show that 72.2%, 46.8%, and 22.5% of Pb, Cu, and Mn were removed by starfish, while 100% of the three metals were removed by ICS after 150 minutes. Competitive adsorption of starfish for Pb, Cu, and Mn from water was investigated by batch experiment. Starfish has the greatest affinity for Pb compared to Cu and Mn at a concentration of 100 mg/L of each metals and an interval of pH=4.5~8. Freundlich and Langmuir adsorption isotherms were utilized to describe the adsorption reaction. Adsorption isotherm results indicated that the adsorption capacity of ICS for Cu was 0.0537 mg/g and that of starfish for Cu was 0.0327 mg/g. This study shows that starfish can be converted to a useful adsorbent for heavy metals removal.
현무암쇄석을 충진한 토양피복형 접촉산화공정의 오염물질제거효율에 관한 연구
최철호 ( Chul Ho Choi ),이승목 ( Seung Mok Lee ),윤종화 ( Jong Hwa Yoon ),황필기 ( Pil Gi Hwang ),김정용 ( Jung Yong Kim ) 한국물환경학회 2005 한국물환경학회지 Vol.21 No.1
Nutrients removal performance of a contact oxidation reactor covered with soil was investigated when basalt rubble was used as a contact medium under various operating conditions. The objective of the experiment was to determine the effectiveness of the system by measuring the removal efficiencies of nutrients from a technical and economical viewpoint. Under the ranges of HRT(20 and 40 hrs) in the experiment, the removal rates of organic matter were as high as 97.5% by showing an effluent BOD_5 of less than 10 ㎎/L. The test of nitrogen removal when the turf was planted on the top soil showed that the average removal rate increased as much as 25% as compared to that without planting. It was suggested that the construction and maintenance cost could be reduced over 20% when the HRT of the system was decreased from 72 to 40 hrs.