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标题：Adsorption Performance for the Removal of Cu(II) on the Ammonium Acetate Modified Sugarcane Bagasse
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作者：Guoting Li ; Mingju Wang ; Xi Chen 等
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2017
卷号：16
期号：3
页码：843-848
语种：English
出版社：Technoscience Publications
摘要：Sugarcane bagasse, an agricultural waste biomass was innovatively used to prepare ammoniumacetate modified sugarcane bagasse via a simple wet impregnation method. The prepared adsorbentwas used for the adsorptive removal of copper from aqueous solution. It was found that an increasein adsorbent dosage significantly increased the removal efficiency for copper. Compared to the rawbagasse, the adsorption capacity of the modified bagasse was dramatically enhanced by 116.2%. AtpH 5.0, 7.0 and 9.0, the reaction kinetic data were simulated and compared using pseudo-first-order,pseudo-second-order and Elovich kinetic models. Results indicate that both pseudo-second-orderand Elovich kinetic models could better describe the adsorption kinetics. This demonstrates that theadsorption of copper onto the modified bagasse was a chemisorption process in which the ratedetermining step is diffusion in nature. Thermodynamic analysis demonstrated the enthalpy and entropyof the adsorption process as 643.6 KJ mol-1 and 250.5 J mol-1 k-1, respectively. The positive value of thereaction enthalpy implies that the uptake of copper increases with a rise in the reaction temperature.The adsorption of copper was spontaneous and endothermic in nature.
关键词：Sugarcane bagasse; Ammonium acetate; Copper; Adsorption kinetics