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Statistical optimization and characterization of fluoride biosorption using dead microbial biomass

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Title Statistical optimization and characterization of fluoride biosorption using dead microbial biomass
 
Creator Marimuthu, Sivasankari
Varkis Mani, Mary Gladys
Ganapathiappan, Ramapriya
Rajendran, Karthikeyan
 
Subject Adsorption isotherm
Adsorption kinetics
Biosorbent
Defluoridation
Dead microbial biomass
Fluoride biosorption
Response surface methodology
 
Description 494-505
Excessive fluoride consumption (> 2.0 mg/L) results in fluorosis, teeth staining, or bone weakening. It is critical to
concentrate on the defluoridation of water. Adsorption has been a conventional method of fluoride removal in aqueous
solution. Biosorbents are cost-effective, easily obtainable, and ecologically sustainable sources of adsorbents. In this study,
aqueous fluoride solution is treated with dead bacterial biomass. Effects of process conditions like initial fluoride
concentration, biomass dosage, pH, temperature, and contact time have been studied. Central Composite Design (CCD) with
30 experiments is performed. The centre point experimental conditions have been repeated 6 times. The optimum fluoride
biosorption of 76.89% is observed after 8 h of biosorption with 3.25 mg L-1 initial fluoride concentration, 775 mg L-1 of
biomass dosage, at temperature 55 ℃ and pH 4.5. R2 value of the experimental design is found to be 0.92. Biosorption
kinetic studies revealed that fluoride biosorption followed a pseudo-second-order kinetics and adsorption isotherm is best
described by Freundlich isotherm. The biosorption efficiency of immobilised biosorbent is also studied using column
approach. Biosorbent is characterised using SEM, FTIR and EDX techniques. The desorption and recyclability studies
suggest that dead bacterial biomass could serve as a potential biosorbent for fluoride biosorption.
 
Date 2024-05-07T09:50:53Z
2024-05-07T09:50:53Z
2024-05
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/63864
https://doi.org/10.56042/ijct.v31i3.3699
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.31(3) [May 2024]