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oai:uvadoc.uva.es:10324/560052025-09-04T11:35:50Zcom_10324_1689com_10324_954com_10324_894col_10324_1690

Silva Lacerda, Viviane Da López Sotelo, Juan Benito Correa Guimaraes, Adriana Hernández Navarro, Salvador Sánchez Báscones, Mercedes Navas Gracia, Luis Manuel Martín Ramos, Pablo Martín Gil, Jesús 2022-10-19T08:52:38Z 2022-10-19T08:52:38Z 2015 Journal of Environmental Management, 2015, Vol. 155, págs. 67-76 0301-4797 https://uvadoc.uva.es/handle/10324/56005 10.1016/j.jenvman.2015.03.007 67 76 Journal of Environmental Management 155 Producción Científica By-products from the wax production process from carnauba palm (leaves), from the extraction of oil from macauba seeds (endocarp) and from pine nut production (shell) have been assessed for activated carbon production, using H3PO4 or CaCl2 for their chemical activation. The resulting activated charcoals have been thoroughly characterized by elemental and thermal analysis, X-ray diffraction, infrared spectroscopy, electron scanning microscopy and N2 adsorption behavior. Subsequently, their adsorption capacity for the removal of rhodamine B (RhB) from aqueous solutions has been evaluated by studying different parameters: contact time, pH, adsorbent dose, initial dye concentration and solution temperature. The adsorption of RhB followed Freundlich's model in all cases. Kinetic studies indicate that the pseudo-second order model can be used for describing the dynamics of the adsorption process. Thermodynamic parameters have also been evaluated, indicating its endothermic and spontaneous nature. Finally, a preliminary analysis of the impact of cellulose content in the carbon precursor materials has been conducted, by using a mixture of native cellulose with one of the lignocellulosic materials. Junta de Castilla y León (Project VA036A12-2) application/pdf eng Elsevier info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © Elsevier Attribution-NonCommercial-NoDerivatives 4.0 Internacional Carbon, Activated Adsorción Pinos Arboles Aceites vegetales Residuos - Tratamiento Rhodamine B 5102.01 Agricultura Rhodamine B removal with activated carbons obtained from lignocellulosic waste info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0301479715001371 SI