Improvement of Zn (II) and Cd (II) Biosorption by Priestia megaterium PRJNA526404 Isolated from Agricultural Waste Water

Heavy metals are considered as dangerous pollutants even in relatively low concentrations. Biosorption is an ecofriendly technology that uses microbial biomasses for adsorbing heavy metals from wastewater on their surfaces based on physicochemical pathways. Ten agricultural wastewater samples were c...

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Bibliographic Details
Published in:Microorganisms (Basel) 2022-12, Vol.10 (12), p.2510
Main Authors: Alzahrani, Othman M, Abo-Amer, Aly E, Mohamed, Rehab M
Format: Article
Language:English
Subjects:
16S rRNA
Adsorption
Agricultural pollution
Agricultural wastes
Bacteria
Biomass
Biosorption
Cadmium
Cell walls
Electrolytes
Equilibrium
Experiments
Fourier transforms
Freeze drying
Genetic testing
Heavy metals
Heuristic
Infrared analysis
Low concentrations
Microorganisms
pH effects
Phylogenetics
Pollutants
Priestia megaterium
rRNA 16S
Spectrum analysis
Wastewater
Water analysis
Water sampling
Zinc
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Summary:Heavy metals are considered as dangerous pollutants even in relatively low concentrations. Biosorption is an ecofriendly technology that uses microbial biomasses for adsorbing heavy metals from wastewater on their surfaces based on physicochemical pathways. Ten agricultural wastewater samples were collected from different sites in Sohag Governorate, Egypt. One hundred and nineteen zinc and cadmium-resistant bacterial isolates were recovered from the water samples. Interestingly, the isolate R1 was selected as the most resistant to Zn and Cd . This isolate was morphologically and biochemically characterized and identified by sequencing of 16S rRNA gene as , and then deposited in the GenBank database under the accession number PRJNA526404. Studying the effects of pH and contact time on the biosorption process revealed that the maximum biosorption was achieved within 50 min at pH 7 and 8 for Zn and Cd , respectively, by the living and lyophelized biomass of PRJNA526404. The preliminary characterization of the main chemical groups present on the cell wall, which are responsible for heavy metal biosorption, was performed by Infrared analysis (IR). Kinetics studies revealed that data were fitted towards the models hypothesized by Langmuir and Freundlich isotherm equations. The maximum capacity values ( ) for biosorption of zinc and cadmium reached by using living and lyophelized biomass were 196.08; 227.27 and 178.57; 212.777 mg/g, respectively, and it was indicated that lyophilization improved efficiency of the biomass to heavy metals compared to living cells. The results indicated that PRJNA526404 had good application prospect in cadmium and zinc water remediation.
ISSN:2076-2607
2076-2607
DOI:10.3390/microorganisms10122510