Chitosan-orange pe el biosorbent for hexavalent chromium removal from aqueous solutions


  • Yanay Fernández Reina National Technological Institute of Mexico in Celaya
  • Pamela V. Sierra Trejo National Technological Institute of Mexico in Celaya
  • Rosalba Patiño Herrera National Technological Institute of Mexico in Celaya
  • Teresa del C. Flores Flores National Technological Institute of Mexico in Celaya
  • Guillermo González Alatorre Tecnológico Nacional de México en Celaya
  • José Francisco Louvier Hernández National Technological Institute of Mexico in Celaya



chitosan, orange peel, hexavalent chromium, drying method, isotherms, Freundlich, beads, biocomposite


chromium is one of the most important water pollutants being Cr(VI) the one with the greatest environmental impact. The objective of this work is to evaluate the adsorption capacity of a biosorbent formed by chitosan-orange peel (CTS-OP) to remove hexavalent chromium from water. The novelty of this work is the evaluation of the drying process effect (oven, vacuum, and freeze-drying) on chromium adsorption capacity. Adsorbents are characterized using X-ray diffraction, FTIR spectroscopy and adsorption kinetics and isotherms measuring Cr(VI) concentration using UV-Vis absorption at 540 nm after complexing with 1,5–diphenylcarbazide. Adsorption capacity is enhanced at pH 2.0 and OPW particle size of 0.300 microns. The shoulder that appears at 944 cm-1 after Cr(VI) adsorption in all three kind of CTS-OPW beads, indicate that chromate ion is bonding with the sorbent. The chi-squared analysis (χ2) indicate that Freundlich isotherm fits better that Langmuir isotherm for all CTS-OPW beads, and the best fit is obtained with Elovich model for kinetic studies. The adsorption capacity of the CTS-OPW beads was also evaluated for the three types of drying. It can be concluded that vacuum oven-dried beads have the highest hexavalent chromium adsorption capacity, 33.89 mg g-1, followed by freeze-dried beads, 32.4 mg g-1, and finally oven-dried beads with a  value of 27.5 mg g-1.


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Author Biographies

Yanay Fernández Reina , National Technological Institute of Mexico in Celaya

Department of Chemical Engineering. Celaya, Guanajuato

Pamela V. Sierra Trejo , National Technological Institute of Mexico in Celaya

Department of Chemical Engineering. Celaya, Guanajuato

Rosalba Patiño Herrera, National Technological Institute of Mexico in Celaya

Department of Chemical Engineering. Celaya, Guanajuato

Teresa del C. Flores Flores, National Technological Institute of Mexico in Celaya

Department of Chemical Engineering. Celaya, Guanajuato

Guillermo González Alatorre, Tecnológico Nacional de México en Celaya

Department of Chemical Engineering. Celaya, Guanajuato

José Francisco Louvier Hernández, National Technological Institute of Mexico in Celaya

Department of Chemical Engineering. Celaya, Guanajuato


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How to Cite

Fernández Reina , Y. ., Sierra Trejo , P. V., Patiño Herrera, R. ., Flores Flores, T. del C., González Alatorre, G. ., & Louvier Hernández, J. F. (2023). Chitosan-orange pe el biosorbent for hexavalent chromium removal from aqueous solutions. Nova Scientia, 15(31), 1–22.



Natural Sciences and Engineering