Indian Journal of Science and Technology
Year: -0001, Volume: 11, Issue: 45, Pages: 1-6
Angel Villabona-Ortiz1 , Candelaria Tejada-Tovar1 and Angel Gonzalez-Delgado2 *
1 Department of Chemical Engineering, Process Design and Biomass Utilization Research Group (IDAB), University of Cartagena, Cartagena, Bolivar, Colombia; [email protected], [email protected]
2 Department of Chemical Engineering, Nanomaterials and Computer Aided Process Engineering Research Group (NIPAC), University of Cartagena, Cartagena, Bolivar, Colombia; [email protected]
*Author for correspondence
Department of Chemical Engineering, Nanomaterials and Computer Aided Process Engineering Research Group (NIPAC), University of Cartagena, Cartagena, Bolivar, Colombia; [email protected]
Background: Immobilization of heavy metals pollutants has attached major attention to face environmental problems of adsorbent disposal after concluding its useful life. Objective: This work is focused on studying adsorption-desorption cycles of nickel and lead ions onto cassava peels biomass and applying cement-based solidification/stabilization technique to immobilize these heavy metals. Materials and Methods: The cassava peels biomass was characterized by FT-IR technique in order to determine functional groups involving in adsorption process. Adsorption capacity was calculated in four adsorption cycles for both nickel and lead uptake. Desorption yield was determined by varying desorbing agent type and its concentration. Immobilization technique was applied to prepare bricks, which were subjected to compression resistance testing and leaching experiments. Results: It was found that the maximum adsorption capacities for nickel and lead ions were 19.63 and 12.42 mg/g, respectively. The desorption experiments reported better results using hydrochloric acid for lead and nitric acid for nickel. In addition, all the bricks can resist compression and obey environmental policy for leaching. Improvement/Novelty: The suitability of immobilization technique to reduce environmental issues of heavy metals.
Keywords: Adsorption, Cement, Biomass, Immobilization, Pollutants
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