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Investigation of Citrus reticulata peels as an efficient and low-cost adsorbent for the removal of safranin orange dye

Januário, Eduarda Freitas Diogo, Vidovix, Taynara Basso, Araújo, Lennon Alonso de, Bergamasco Beltran, Laiza, Bergamasco, Rosângela, Vieira, Angélica Marquetotti Salcedo·2022·Environmental Technology
DOI 10.1080/09593330.2021.1946601
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Abstract

Safranin orange (SO) is a cationic dye widely used in industrial sectors. It becomes a threat to the aquatic ecosystem once it reaches water resources, directly affecting photosynthetic activity and dissolved oxygen rate. In view of this scenario and considering the large production of agro-industrial waste, which provides significant disposal costs and environmental impacts, the agricultural by-products such as mandarin peels (MP) are being used as biosorbent materials. Thus, this work proposed the use of MP for SO adsorption. The material was characterized by SEM, zeta potential, and FTIR analysis, in which it was possible to verify heterogeneous porous morphology, predominantly negative surface, and organic functional groups that facilitate adsorption. The results were promising, wherein the maximum adsorption capacity was 464 mg g -1 (318 K), 0.4 g L -1 adsorbent concentration, 120 min equilibrium time and removal percentage of 84.75%. The experimental data showed a better fit to the Langmuir and pseudo-second order mathematical models. The thermodynamic analysis inferred spontaneous, endothermic, and reversible character for SO adsorption onto MP. The main proposed adsorptive mechanisms were hydrogen bonds, π-interactions, and electrostatic interactions. In addition, the reuse of MP showed good efficiency since the adsorption capacity was maintained above 50% after four cycles (from 77.90 to 41.55 mg g -1 ). Moreover, when evaluating the effect of pH and ionic strength,…

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  • The adsorption capacity of biosorbent prepared from mandarin peels was maintained more than 50% after four cycles, decreasing from 77.90 to 41.55 mg/g during removal of safranin orange dye.

    “In another study, the adsorption capacity of biosorbent prepared from mandarin (Citrus reticulata) peels was maintained more than 50% after four cycles (from 77.90 to 41.55 mg/g) during the removal of Safranin orange (SO) dye.”

    From Biomass-Based Adsorbents for Removal of Dyes From Wastewater: A Review (2021) · cites this paper as Januário et al., 2021

  • Mandarin peel had a maximum adsorption capacity of 464 mg/g for safranin O at 0.4 g/L adsorbent dose, 2 h contact time, and 84.75% removal.

    “Mandarin (Citrus reticulata) peel (MP) was utilized in the removal of SO from aqueous solution with the maximum adsorption capacity of 464 mg/g, 0.4 g/L adsorbent dose, 2 h contact time, and 84.75% removal.”

    From Biomass-Based Adsorbents for Removal of Dyes From Wastewater: A Review (2021) · cites this paper as Januário et al., 2021

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Metadata

Authors
Januário, E. F. D., Vidovix, T. B., Araújo, L. A. D., Bergamasco Beltran, L., Bergamasco, R., & Vieira, A. M. S.
Affiliations
State University of Maringá
ORCID
Venue
Environmental Technology
Publisher
Informa UK Limited
Published
2021-07-08
Volume
43
Issue
27
Pages
4315-4329
ISSN
  • 0959-3330
  • 1479-487X
DOI
10.1080/09593330.2021.1946601
Cited by
44
References
0
Language
en
Funders
  • National Council for Scientific and Technological Development
  • Higher Education Personnel Improvement Coordination
  • CAPES

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