Enhanced removal of Congo red dye from aqueous solution by surface modified activated carbon with bacteria
Aims The adsorption behaviour and mechanisms of the surface modified activated carbon with bacteria was evaluated. Methods and Results 16S rRNA was employed to identify the hydrocarbon‐degrading bacteria. The bacteria was characterized by TEM and electron microscope. The surface modified activated c...
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Published in | Journal of applied microbiology Vol. 131; no. 5; pp. 2270 - 2279 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
England
Oxford University Press
01.11.2021
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Subjects | |
Online Access | Get full text |
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Summary: | Aims
The adsorption behaviour and mechanisms of the surface modified activated carbon with bacteria was evaluated.
Methods and Results
16S rRNA was employed to identify the hydrocarbon‐degrading bacteria. The bacteria was characterized by TEM and electron microscope. The surface modified activated carbon with bacteria was characterized by SEM. The adsorption behaviour was tested by static adsorption and dynamic adsorption.
Conclusion
The adsorption efficiency of the modified activated carbon was high when pH was weak acidic, and the adsorption capacity increased with the increase of temperature ranging from 20 to 35°C. The adsorption capacity peaked at 234·6 mg g−1 at 25°C, which was sixfold higher than that of activated carbon. The pseudo‐first‐order kinetic can more accurately assess Congo red adsorption on the two adsorbents. The adsorption of Congo red by bacteria surface modified activated carbon fitted well with the Langmuir's model. The adsorption process was endothermic, and the biological floccules were formed during the adsorption. The physical adsorption is the main driving force.
Significance and Impact of the Study
The results indicate that the bacteria surface‐modified activated carbon can be used effectively as an adsorbent to eliminate Congo red from aqueous solutions. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1364-5072 1365-2672 |
DOI: | 10.1111/jam.15100 |