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Advances in Nano Research Volume 11, Number 6, December 2021 , pages 667-678 DOI: https://doi.org/10.12989/anr.2021.11.6.067 |
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Drug adsorption and anti-microbial activity of functionalized multiwalled carbon nanotubes |
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Megha Saxena, Disha Mittal, Richa Boudh, Kapinder Kumar,
Anita K. Verma and Reena Saxena
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| Abstract | ||
| Multiwalled carbon nanotubes (MWCNTs) were first oxidized (O-CNTs) to introduce carboxylic group and then further functionalized (F-CNTs) with m-phenylenediamine, which was confirmed by FTIR and SEM. It was used as an effective adsorbent for the adsorptive removal of diclofenac drug from water. Under optimum conditions of pH 6, stirring speed 600 rpm, the maximum adsorption capacity obtained was 532 mg g-1 which is superior to the values reported in literature. The adsorption was quite rapid as 25 mg L-1 drug solution was adsorbed in only 3 minutes of contact time with 10 mg of adsorbent dose. The adsorption kinetics and isotherms were studied using various models to evaluate the adsorption process. The results showed that the data best fit in kinetics pseudo-second order and Langmuir isotherm model. Furthermore, the oxidized and functionalized MWCNTs were applied on gram-negative Escherichia coli and gram-positive Staphylococcus aureus using agar disc diffusion assay to validate their anti-microbial activity. Results were unique as both oxidized and functionalized MWCNTs were equally active against both E. coli and S. aureus. The newly synthesized F-CNTs have great potential in water treatment, with their dual action of removing drug and pathogens from water, makes it potential applicant to save environment. | ||
| Key Words | ||
| adsorption; antimicrobial; diclofenac; functionalized multiwalled carbon nanotubes; m-phenylenediamine | ||
| Address | ||
| Megha Saxena,Richa Boudh and Reena Saxena: Department of Chemistry, Kirori Mal College, University of Delhi, Delhi 110007, India Disha Mittal, Kapinder Kumar and Anita K. Verma: Nanobiotech Lab, Department of Zoology, Kirori Mal College, University of Delhi, Delhi 110007, India | ||