GFH(Granular Ferric Hydroxide)를 이용한 불소 흡착연구

초록

The present study was undertaken to evaluate the adsorption potential of Granular Ferric Hydroxide (GFH) for fluoride removal from water by batch mode. The adsorption capacity of GFH for fluoride was found 0.052 mmol/g at 25℃. The kinetic data reveal that uptake rate of fluoride on GFH was fast in the beginning, and 50% adsorption was occurred within 5 minutes. The equilibrium time for maximum uptake of fluoride on GFH was about 30 minutes. Two simplified kinetic models namely (i) Lagergren’s pseudo-first-order model and (ii) Weber and Morris intraparticle diffusion model were tested to describe the adsorption mechanism. It was found that the present system of fluoride adsorption on GFH was well described with pseudo-first-order kinetic model. The intraparticle diffusion model suggests that the mechanism of fluoride adsorption onto GFH is complex and surface adsorption as well as intraparticle diffusion contribute to the actual adsorption process.

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