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Adsorption behavior of p-nitrophenol from water onto activated carbon fiber.

Dengyong Tang, Zheng Zheng, Zheng You-fei, Du-Liang He, Gu Jing

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Abstract

Effects of pH and NaCl on the adsorption of p-nitrophenol(PNP)onto activated carbon fiber(ACF)were studied;adsorption isotherms were measured at different temperatures;the thermodynamics and kinetics of the adsorption were also studied.It was found that PNP adsorption amount significantly depended on pH,with the maximum adsorption amount at pH 4.3;and sodium chloride in the solution facilitated PNP adsorption on ACF.Freundlich equation was better than Langmuir equation in describing the behavior of PNP adsorption onto ACF,thus indicating the possibility of polymolecular layer adsorption.The adsorption was favorable one,and the adsorption capacity increased with decreasing temperature.The adsorption was an exothermic physical and spontaneous process.The experimental data were fitted very well by the pseudo-second-order kinetic model.

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What this paper is about

Effects of pH and NaCl on the adsorption of p-nitrophenol(PNP)onto activated carbon fiber(ACF)were studied;adsorption isotherms were measured at different temperatures;the thermodynamics and kinetics of the adsorption were also studied.It was found that PNP adsorption amount significantly depended on pH,with the maximum adsorption amount at pH 4.3;and sodium chloride in the solution facilitated PNP adsorption on ACF.Freundlich equation was better than Langmuir equation in describing the behavior of PNP adsorption onto ACF,thus indicating the possibility of polymolecular layer adsorption.The adsorption was favorable one,and the adsorption capacity increased with decreasing temperature.The adsorption was an exothermic physical and spontaneous process.The experimental data were fitted very well by the pseudo-second-order kinetic model.

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Available abstract

Effects of pH and NaCl on the adsorption of p-nitrophenol(PNP)onto activated carbon fiber(ACF)were studied;adsorption isotherms were measured at different temperatures;the thermodynamics and kinetics of the adsorption were also studied.It was found that PNP adsorption amount significantly depended on pH,with the maximum adsorption amount at pH 4.3;and sodium chloride in the solution facilitated PNP adsorption on ACF.Freundlich equation was better than Langmuir equation in describing the behavior of PNP adsorption onto ACF,thus indicating the possibility of polymolecular layer adsorption.The adsorption was favorable one,and the adsorption capacity increased with decreasing temperature.The adsorption was an exothermic physical and spontaneous process.The experimental data were fitted very well by the pseudo-second-order kinetic model.

Key concepts: Adsorption, Freundlich equation, Activated carbon, Langmuir, Chemistry, Exothermic reaction, Fiber, Kinetics

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Adsorption behavior of p-nitrophenol from water onto activated carbon fiber. — Research Paper | ScholarLens