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DOI : ,    Vol.12, No.4, 19 ~ 27, 2004
Title
Characteristics of Heavy Metal Removal Using Iron-Coated Starfish
황필기 Pil Gi Hwang , 신인수 In Soo Shin , 어명철 Myung Cheol Eu , 최철호 Chul Ho Choi , 이승목 Seung Mok Lee
Abstract
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.
Key Words
Starfish, Iron-Coated Starfish, ICS, Heavy Metals, Adsorption, Wastewater
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