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Application of Cement-based Solidification/Stabilization Technique for Immobilizing Lead and Nickel Ions after Sorption-Desorption Cycles using Cassava Peels Biomass


Affiliations
1 Department of Chemical Engineering, Process Design and Biomass Utilization Research Group (IDAB), University of Cartagena, Cartagena, Bolivar, Colombia
2 Department of Chemical Engineering, Nanomaterials and Computer Aided Process Engineering Research Group (NIPAC), University of Cartagena, Cartagena, Bolivar, Colombia
 

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.
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  • Application of Cement-based Solidification/Stabilization Technique for Immobilizing Lead and Nickel Ions after Sorption-Desorption Cycles using Cassava Peels Biomass

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Authors

Angel Villabona-Ortiz
Department of Chemical Engineering, Process Design and Biomass Utilization Research Group (IDAB), University of Cartagena, Cartagena, Bolivar, Colombia
Candelaria Tejada-Tovar
Department of Chemical Engineering, Process Design and Biomass Utilization Research Group (IDAB), University of Cartagena, Cartagena, Bolivar, Colombia
Angel Gonzalez-Delgado
Department of Chemical Engineering, Nanomaterials and Computer Aided Process Engineering Research Group (NIPAC), University of Cartagena, Cartagena, Bolivar, Colombia

Abstract


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.

References