Journal
CHEMOSPHERE
Volume 291, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.132673
Keywords
Terminalia arjuna; Magnetite nanoparticles; Lead adsorption; Methylene blue; Simulated wastewater
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Funding
- Department of Chemistry, Cooch Behar Panchanan Barma University
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This study presents a new approach to synthesizing Terminalia arjuna bark extract coated magnetite nanoparticles (TA@MNPs) for efficient removal of methylene blue (MB) and lead ions [Pb(II)] from wastewater. The synthesized TA@MNPs exhibited stability and high adsorption capacity for Pb(II). The results suggest that TA@MNPs could be a greener, cheaper, and convenient solution for water treatment.
This study reports a greener, cheaper and convenient approach to synthesize Terminalia arjuna bark extract coated magnetite nanoparticles (TA@MNPs) using the co-precipitation method and efficient removal of methylene blue (MB) and lead ions [Pb(II)] from simulated wastewater. The synthesized nanoparticles (NPs) were characterized by various techniques such as DLS, XRD, FTIR, HRTEM, AGM, and TGA. From TGA analysis, TA@MNPs was found to be stable even after 500 degrees C. Using the batch method, maximum removal was achieved at pH 9.0 for MB and pH 3.0 for Pb(II) solutions, respectively. Adsorption study showed that TA@MNPs followed pseudo-second-order kinetics by both adsorbates while isotherm modeling towards adsorption of Pb(II) and MB exhibited Langmuir and Freundlich isotherm respectively. The maximum adsorption capacity for Pb(II) on TA@MNPs was 210.5 mg g(-1). The thermodynamic study proved the spontaneity of the physisorption process. Regeneration studies were also performed using five different eluents for the two adsorbents. Overall, TA@MNPs effectively removed pollutants from wastewater and thus could be potentially useful in providing clean water in a cheaper way.
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