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본 연구에서는 고정층 반응기를 이용하여 칼사이트형 탄산칼슘에 대한 납이온의 총괄 흡착속도식을 구명하였으며 강산 용액으로 개질된 탄산칼슘의 흡착능을 관찰했다. 탄산칼슘은 유리 비드에 고정시켜 반응기의 충전층으로 사용하였으며 고정된 탄산칼슘 양은 248.8± 17.7 mg/cm2였다. 탄산칼슘과 납이온 간의 흡착등온식은 Langmuir 식으로 나타내는 것이 Freundlich 식보다 신뢰도가 높았다. pH 2∼4 범위에서는 pH에 따라 흡착량은 급격히 증가하였으며 pH 4∼8 범위에서는 증가가 거의 없었다. 15% 염산 수용액으로 개질된 탄산칼슘의 흡착능이 가장 우수했으며 자연상태의 탄산칼슘에 비해 25% 이상 흡착능 개선효과가 있었다. 흡착에 따라 수용액의 칼슘이온 증가가 관찰되었다. 총괄 흡착속도식에 관한 실험은 경막저항이 최소가 되는 80 mL/min의 유속에서 진행되었으며 자연상태의 탄산칼슘과 15%의 염산 수용액으로 개질된 탄산칼슘에 대한 총괄 흡착속도식은 다음과 같았다.r ~= ~0.055 C_e ^ 23.999


In this article, adsorption experiments were performed to study the overall adsorption rate of the lead ion(Pb2+) on the calcite-type calcium carbonate in a fixed bed reactor, and the adsorptivity on the pretreated calcium carbonate in a strong acidic solution was investigated. Calcium carbonate was immobilized on glass beads that were used in a packed bed. The amount of fixed calcium carbonate was about 248.8± 17.7 mg/cm2. The reliability of Langmuir adsorption isotherm was higher than that of Freundlich adsorption isotherm. The adsorption amount increased rapidly in pH range of 2 to 4; however, no further increase in the adsorption amount was observed from pH 4 to pH 8. The pretreated calcium carbonate with a 15% HCl solution had the highest adsorptivity; the adsorptivity was increased by 25%. Increased calcium ion(Ca2+) concentration in solutions was observed as the adsorption process progressed. An experiment to measure the overall adsorption rate was conducted at the flow rate of 80 mL/min, where the film diffusion resistance was at a minimum. The overall adsorption rates of non-treated and treated with a 15 % HCl solution of calcium carbonates, respectively, were as follows:r ~= ~0.055 C_e ^ 23.999