Zeta Potential Mechanisms Applied to Cellular Immobilization: A Study with Saccharomyces cerevisiae on Dye Adsorption

The wastewater discharge from the textile industry is a major threat to environmental safety, especially for developing countries. In this context, we proposed a biopolymer-based strategy to mitigate this issue. A new kind of immobilization by the zeta potential from Saccharomyces cerevisiae cell in...

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Bibliographic Details
Published in:Journal of polymers and the environment Vol. 29; no. 7; pp. 2214 - 2226
Main Authors: Mendes, Carolina Rosai, Dilarri, Guilherme, Stradioto, Marcia Regina, Lopes, Paulo Renato Matos, Bidoia, Ederio Dino, Montagnolli, Renato Nallin
Format: Journal Article
Language:English
Published: New York Springer US 01.07.2021
Springer Nature B.V
Subjects:
Adsorption
Adsorptivity
Aqueous solutions
Beads
Bioassays
Biopolymers
Cell walls
Chemistry
Chemistry and Materials Science
Chitosan
Color removal
Daphnia similis
Developing countries
Diffusion layers
Dyes
ecotoxicology
Electrostatic properties
environment
Environmental Chemistry
Environmental Engineering/Biotechnology
gelation
hydrophilicity
Immobilization
Industrial Chemistry/Chemical Engineering
LDCs
Materials Science
Original Paper
Polymer Sciences
Saccharomyces cerevisiae
temperature
Textile industry
Thermodynamics
Toxicity
Wastewater
Wastewater discharges
Yeast
Zeta potential
Chemisorption
Electrostatic binding
Yeast
Chitosan
Ecotoxicity
ISSN:1566-2543, 1572-8919
Online Access:Get full text
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Summary:The wastewater discharge from the textile industry is a major threat to environmental safety, especially for developing countries. In this context, we proposed a biopolymer-based strategy to mitigate this issue. A new kind of immobilization by the zeta potential from Saccharomyces cerevisiae cell in the chitosan was tested. Two novel materials were produced and characterized: Chitosan beads (CB) synthesized by the ionotropic gelation technique, and chitosan beads with immobilized S . cerevisiae by zeta potential (CBY), both targeting the Acid Blue 25 dye removal from aqueous solutions. FT-IR and MEV analyses were used to investigated and monitoring the mechanism of cellular interaction with the biopolymer. We observed that the cell wall of yeasts had a negative zeta potential, confirming electrostatic interactions between the cell and the biopolymer that improved their immobilization. Kinetics, adsorption isotherms, thermodynamics, and matter behaviour supported our evidences. Kinetic studies showed that CBY reached kinetic equilibrium in 240 min and qe (exp)  = 28.201 μg mg −1 . The CB reached equilibrium at 330 min and qe (exp)  = 17.518 μg mg −1 . Therefore, the materials allowed intraparticle diffusion towards the mesopore layers. Thermodynamics showed that adsorption was spontaneous and influenced by temperature. Both CB and CBY underwent swelling during adsorption due to their own hydrophilicity, leading up to 204% increase in volume compared to dry beads. These experiments were supplemented by ecotoxicity assays evaluating Daphnia similis interactions with Acid Blue 25 dye solutions before and after the adsorptive treatment. Bioassays showed a significant decrease in toxicity after the adsorption using CBY.
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ISSN:1566-2543
1572-8919
DOI:10.1007/s10924-020-02030-0