Green and Fast Extraction of Chitin from Waste Shrimp Shells: Characterization and Application in the Removal of Congo Red Dye

Author:

Gharbi Fatma Zohra12,Bougdah Nabil23,Belhocine Youghourta14ORCID,Sbei Najoua5,Rahali Seyfeddine6ORCID,Damous Maamar17,Seydou Mahamadou8ORCID

Affiliation:

1. Department of Process Engineering, Faculty of Technology, University of 20 August 1955, Skikda 21000, Algeria

2. Laboratory LRPCSI, University of 20 August 1955, Skikda 21000, Algeria

3. Department of Petrochemical, Faculty of Technology, University of 20 August 1955, Skikda 21000, Algeria

4. Laboratory of Catalysis, Bioprocess and Environment, Department of Process Engineering, Faculty of Technology, University of 20 August 1955, Skikda 21000, Algeria

5. Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Karlsruhe, Germany

6. Department of Chemistry, College of Science and Arts At Ar-Rass, Qassim University, Saudi Arabia

7. Research Unit of Environmental Chemistry and Molecular Structural (CHEMS), University of Constantine 1, Constantine 25000, Algeria

8. Université Paris Cité, CNRS, ITODYS, F-75013 Paris, France

Abstract

Due to their detrimental and carcinogenic effects, synthetic organic dyes pose significant environmental and health risks. Consequently, addressing the bioremediation of industrial wastewater containing these organic dyes has become an urgent environmental concern. The adsorption using low-cost and green materials is one of the best alternative techniques for the removal of dyes. This study aims to investigate the use of chitin to eliminate Congo red (CR), an anionic dye, from wastewater. The chitin was produced from shrimp shell in a quick and environmentally friendly manner by utilizing a co-solvent (glycerol/citric acid (GLC)). The resulting adsorbent was characterized through various techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), and FT-IR spectroscopy. The effectiveness of CR removal with chitin was studied with respect to contact time, adsorbent dose, initial pH, equilibrium isotherms, and kinetic and thermodynamic parameters. It was observed that variations in the dye concentration and pH significantly influenced the removal of CR with chitin. Under optimal operating conditions (pH = 7, contact time = 130 min, temperature = 50 °C), the adsorption capacity reached 29.69 ± 0.2 mg/g. The experimental data revealed that CR adsorption onto a chitin adsorbent is better represented by a Langmuir isotherm.

Publisher

MDPI AG

Subject

Filtration and Separation,Analytical Chemistry

Reference66 articles.

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