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제105회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A study on zeta potential analysis of pyrite suspension in the presence of cationic surfactant at pH 7

2010년 2월 24일 19시 36분 43초
42P308포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 <발표Ⅲ>
저자 및
M. M. Binte, 이우진
KAIST 건설 및 환경공학과, Korea
A study was conducted to investigate how the zeta potential of pyrite suspension changes with a range of surfactant concentrations. In this research, 4 g/l pyrite suspension has been equilibrated with 0.1 mM ~ 1.8 mM of cationic cetylpyridinium chloride (CPC) surfactant. The pH of pyrite suspension has been fixed at 7 using 0.1M 3-(N-morpholino) propanesulfonic acid (MOPS) buffer and NaOH. From the zeta potential analysis, it has been observed that the concentration of surfactant could dramatically change the zeta potential of pyrite suspension. At low surfactant concentrations (upto 0.2 mM), the zeta potential value reached from maximum negative value (-5.28 mV) to maximum positive value (36.5 mV) giving the isoelectric point (iep) at 0.12 mM surfactant concentration. With the increasing value of surfactant concentration, the zeta potential started to decrease and from 0.6 mM of surfactant concentration, it gave constant value. The experimental results can contribute to explain the adsorption mechanism of a cationic surfactant on pyrite surface at certain pH condition and this could be applied for the selection of optimum surfactant concentration for maximum adsorption to remove surfactant from selected stages of the industrial process or wastewater emission systems.