Mechanistic studies on bioremediation of dye using Aeromonas veronii immobilized peanut shell biochar.

Autor: Singh A; Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Srinivasanagar P.O, Mangalore, 575025, India. Electronic address: aparna.222ib008@nitk.edu.in., Manikandan SK; Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Srinivasanagar P.O, Mangalore, 575025, India. Electronic address: soumyamanikandan01@gmail.com., Nair V; Department of Chemical Engineering, National Institute of Technology Karnataka (NITK), Surathkal, Srinivasanagar P.O, Mangalore, 575025, India. Electronic address: vaishakhnair@nitk.edu.in.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2024 Dec 01; Vol. 262 (Pt 2), pp. 119908. Date of Electronic Publication: 2024 Sep 02.
DOI: 10.1016/j.envres.2024.119908
Abstrakt: Recalcitrant chemicals in the environment not only present obstacles to living organisms but also contribute to the degradation of natural resources. One contribution to environmental pollution is the discharge of synthetic dyes from the textile sector. This study investigates the combined effect of microbial cells and biochar on eliminating methyl orange (MO) dye. The immobilization of Aeromonas veronii on peanut shell biochar (APSB) was conducted to investigate its efficacy in removing MO dye from water. PSB synthesized by pyrolysis at 300 °C for 120 min showed maximum bacterial immobilization potential. The highest degradation rate of 96.19 % was achieved in APSB within 96 h using MO dye concentration of 100 mg L -1 , incubation temperature of 37 °C, pH 7, and biocatalyst dosage of 1g L -1 . In comparison, free cells achieved degradation rates of 72.53 % and 61.56 % for PSB. Moreover, the adsorption process was primarily controlled by PSB, with subsequent dye mineralization by A. veronii, as supported by FTIR and LC-MS studies. Moreover, this innovative approach exhibited the reusability of the biocatalyst, giving 76.23 % removal after fifth cycle, suggesting sustainable alternative in dye remediation and potential option for real-time applications.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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