Pseudo-Isotherms Using a Second Order Kinetic Expression Constant |
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Authors: | Yuh-Shan Ho |
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Institution: | (1) School of Public Health, Taipei Medical University, 250 Wu-Hsing Street, Taipei, 11014, Taiwan |
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Abstract: | The kinetics of four sorption systems, Cu/tree fern, Pb/tree fern, AB9/activated clay and BR18/activated clay have been studied based on the assumption of a pseudo-second order rate law. Pseudo-isotherms using the pseudo-second order kinetic expression constant have been developed to describe the four liquid-solid sorption systems. The experimental results have been analyzed using a pseudo-Langmuir and a pseudo-Redlich-Peterson isotherm. Both isotherms were found to represent the measured sorption data well. According to the evaluation using the pseudo-Langmuir equation, the monolayer sorption capacities were obtained to be 13.9, 46.6, 124 and 105 mg g–1 for copper, lead, AB9 and BR18 respectively. |
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Keywords: | pseudo-isotherm pseudo-second order kinetics equilibrium adsorption |
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