화학공학소재연구정보센터
Journal of the Korean Industrial and Engineering Chemistry, Vol.15, No.1, 106-112, February, 2004
아크릴아미드 고정 구멍갈파래에 의한 중금속 Cd(II), Pb(II) 이온의 흡착특성(I)-Column법
Adsorption Characteristics of the Heavy Metals, Cd(II) and Pb(II) Ions, on the Acrylamide-immobilized Ulva pertusa-Column Method
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초록
본 연구에서는 동해안 해조류인 구멍갈파래를 아크릴아미드에 고정하여, Cd(II)및 Pb(II) 중금속 이온의 흡착 특성을 살펴보았다. 순수한 Ulva pertusa 및 Si-Ulva pertusa 흡착제보다는 아크릴아미드에 고정화된 Ulva pertusa의 경우 많은 양의 중금속이 흡착되었으며, Pb(II)이온이 Cu(II) 이온보다 더 잘 흡착되는 것으로 나타났다. 흡착제의 농도가 작은 경우 중금속 이온의 흡착량은 pH에 큰 영향이 없었으나, 흡착제의 농도가 클 경우 중금속 이온의 흡착량은 pH에 큰 영향을 받았다. pH에 따른 중금속 이온의 흡착량은 pH 10.5 > 8.5 > 7.0 > 5.5 > 3.5 순으로 나타났다. 아크릴아미드에 고정화된 Ulva pertusa의 단위 질량에 대해 Cd(II) 및 Pb(II) 이온의 최대 흡착량은 각각 최대 8.73 mg과 13.20 mg으로 나타났다. 또한 Cd(II) 및 Pb(II) 이온의 회수율은 pH에 따라 다소 차이가 있었으나, 각각 61.3 ~ 75.5% 및 61.4 ~ 54.1%로 나타났다. 중금속 이온의 회수에 있어서 산성 조건이 알칼리성 조건보다 효율적이었으며, 본 실험에 의한 중금속 이온의 흡착 특성은 Freundlich 흡착 특성과 잘 일치하는 것으로 나타났다.
Adsorption characteristics of Cd(II) and Pb(II) heavy metal ions onto the Acrylamide-immobilized Ulva pertusa, an algae of the eastern coastal area, was examined in this work. Much amounts of heavy metal ions were adsorbed onto the Acrylamide-immobilized Ulva pertusa than either bare Ulva pertusa of Si-Ulva pertusa. It was also observed that Pb(II) was more readily adsorbed on the algae that Cu(II). The adsorption amounts of heavy metal ions showed no great dependence on the pH value at low adsorbent concentration, but those were high dependent on pH value at high adsorbent concentration. The adsorption amounts of heavy metal ions were in the following order; pH 10.5 > 8.5 > 7.0 > 5.5 > 3.5. The maximum adsorption amounts of Cd(II) and Pb(II) onto 1g of Acrylamide-immobilized Ulva pertusa were 8.73 mg and 13.20 mg, respectively. It was found that recovery yields of Cd(II) and Pb(II) ions were in the range of 61.3 ~ 75.5% and 61.4 ~ 54.1% depending on the pH level. In the heavy metal recovery, acidic condition was more efficient that alkaline condition. The adsorption behavior of these heavy metal ions was well matched with the Freundlich adsorption isotherm.
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