A novel chitosan-alginate@Fe/Mn mixed oxide nanocomposite for highly efficient removal of Cr (VI) from wastewater: Experiment and adsorption mechanism

Alqarni LS 1 , Algethami JS 2 , El Kaim Billah R 3 , Alorabi AQ 4 , Alnaam YA 5 , Algethami FK 1 Show all authors , Bahsis L 6 , Jawad AH 7 , Wasilewska M 8 , López-Maldonado EA 9

Affiliations 

  • 1 Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), P.O.Box 90950, Riyadh 11623,Saudi Arabia
  • 2 Department of Chemistry, College of Science and Arts, Najran University, P.O. Box, 1988, Najran 11001, Saudi Arabia; Advanced Materials and Nano-Research Centre (AMNRC), Najran University, Najran 11001, Saudi Arabia
  • 3 Science Engineer Laboratory for Energy, ENSAJ, Chouaïb Doukkali University, El Jadida, Morocco. Electronic address: rachidelkaimbillah@gmail.com
  • 4 Department of Chemistry, Faculty of Science, Al-Baha University, P.O. Box 1988, Albaha 65799, Saudi Arabia
  • 5 Clinical Laboratory Sciences Department, Prince Sultan Military College of Health Sciences, KFMMC, P.O. Box 11099, Dhahran 31932, Saudi Arabia
  • 6 Laboratoire de Chimie Analytique et Moléculaire, LCAM, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, 4162 Safi, Morocco
  • 7 Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia; Advanced Biomaterials and Carbon Development Research Group, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia; Environmental and Atmospheric Sciences Research Group, Scientific Research Center, Al-Ayen University, Thi-Qar, Nasiriyah, 64001, Iraq. Electronic address: ali288@uitm.edu.my
  • 8 Department of Physical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, Maria Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland
  • 9 Faculty of Chemical Sciences and Engineering, Autonomous University of Baja, California, Tijuana 22390, Baja California, Mexico. Electronic address: elopez92@uabc.edu.mx
Int J Biol Macromol, 2024 Apr;263(Pt 2):129989.
PMID: 38354916 DOI: 10.1016/j.ijbiomac.2024.129989

Abstract

In this study, the synthesis and experimental theoretical evaluation of a new chitosan/alginate/hydrozyapatite nanocomposite doped with Mn2 and Fe2O3 for Cr removal was reported. The physicochemical properties of the obtained materials were analyzed using the following methods: SEM-EDX, XRD, FTIR, XPS, pH drift measurements, and thermal analysis. The adsorption properties were estimated based on equilibrium and adsorption kinetics measurements. The Langmuir, Freundlich and Temkin isotherms were applied to analyze the equilibrium data. The thermodynamic analysis of adsorption isotherms was performed. A number of equations and kinetic models were used to describe the adsorption rate data, including pseudo-first (PFOE) and pseudo-second (PSOE) order kinetic equations. The obtained test results show that the synthesized biomaterial, compared to pure chitosan, is characterized by greater resistance to high temperatures. Moreover, this biomaterial had excellent adsorption properties. For the adsorption of Cr (VI), the equilibrium state was reached after 120 min, and the sorption capacity was 455.9 mg/g. In addition, DFT calculations and NCI analyses were performed to get more light on the adsorption mechanism of Cr (VI) on the prepared biocomposite.

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