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KMID : 0382419980240030124
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Korean Journal of Environmental Health Society
1998 Volume.24 No. 3 p.124 ~ p.130
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Treatment of Laboratory Wastewater Using Waste Egg Shells
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Kim Eun-Ho
Jung Yu-Jin
Kim Hyeong-Seok
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Abstract
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This study was to examine the utilization of waste egg shells for removal of heavy metals in laboratory wastewater. It was estimated that pH increasing formed heavy metals into a hydroxide and then settled to remove them. Removal rate of heavy metals were increased as increased dosage, low adsorbate concentration and passed reaction time. Average adsorption volumes of Cr, Cu, Mn and Pb per g were about 1.21 mg, 1.1 mg, 0.96 mg and 1.04 mg, respectively. If we reflected the adsorption capacity(k) and adsorption intensity(1/n) of Freundlich isotherm, we couldn´t consider waste egg shells as a good adsorbent. It seemed that heavy metals contained in complex wastewater was removed to be influenced by inital pH, solubilities with passed reaction time and competitive reaction.
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