Efficient Adsorption and Catalytic Reduction of Phenol Red Dye by Glutaraldehyde Cross-Linked Chitosan and Its Ag-Loaded Catalysts: Materials Synthesis, Characterization and Application

Chiara Concetta Siciliano, Dinh Van Minh, Paolo Canu, Jyri-Pekka Mikkola and Santosh Govind Khokarale ()
Additional contact information
Chiara Concetta Siciliano: Department of Industrial Engineering, University of Padova, Via F. Marzolo, 9, 35131 Padova, Italy
Dinh Van Minh: Technical Chemistry, Department of Chemistry, Chemical-Biological Centre, Umeå University, S-90187 Umeå, Sweden
Paolo Canu: Department of Industrial Engineering, University of Padova, Via F. Marzolo, 9, 35131 Padova, Italy
Jyri-Pekka Mikkola: Technical Chemistry, Department of Chemistry, Chemical-Biological Centre, Umeå University, S-90187 Umeå, Sweden
Santosh Govind Khokarale: Technical Chemistry, Department of Chemistry, Chemical-Biological Centre, Umeå University, S-90187 Umeå, Sweden

Clean Technol., 2023, vol. 5, issue 2, 1-18

Abstract: In this study, glutaraldehyde cross-linked chitosan support, as well as the catalysts obtained after loading Ag metal (Ag/Chitosan), were synthesised and applied for adsorption and reduction of phenol red dye in an aqueous solution. The Ag/chitosan catalysts were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and inductively coupled plasma-optical emission spectrometry (ICP-OES) analysis techniques. The catalytic reduction and adsorption performance of phenol red dye with Ag/chitosan and cross-linked chitosan, respectively, was performed at ambient reaction conditions. The reduction of dye was carried out using sodium borohydride (NaBH 4 ) as the reducing agent, while the progress of adsorption and reduction study was monitored with ultraviolet-visible (UV-vis) spectrophotometry technique. The reduction of the phenol red dye varied with the amount of catalyst, the concentration of NaBH 4 , Ag metal loading, reaction temperature, phenol red dye concentration and initial p H of the dye solution. The dye solution with a nearly-neutral p H (6.4) allowed efficient adsorption of the dye, while acidic ( p H = 4) and alkaline ( p H = 8, 11, 13.8) solutions showed incomplete or no adsorption of dye. The reusability of the Ag/chitosan catalyst was applied for the complete reduction of the dye, where no significant loss of catalytic activity was observed. Hence, the applicability of cross-linked chitosan and Ag/catalyst was thus proven for both adsorption and reduction of phenol red dye in an aqueous solution and can be applied for industrial wastewater treatment.

Keywords: cross-linked chitosan; Ag/chitosan catalyst; phenol red dye; adsorption; catalytic reduction; catalyst reusability (search for similar items in EconPapers)
JEL-codes: Q2 Q3 Q4 Q5 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2571-8797/5/2/24/pdf (application/pdf)
https://www.mdpi.com/2571-8797/5/2/24/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jcltec:v:5:y:2023:i:2:p:24-483:d:1117494

Access Statistics for this article

Clean Technol. is currently edited by Ms. Shary Song

More articles in Clean Technol. from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().