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Fe-exchanged nano-bentonite outperforms Fe3O4 nanoparticles in removing nitrate and bicarbonate from wastewater.

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Title Fe-exchanged nano-bentonite outperforms Fe3O4 nanoparticles in removing nitrate and bicarbonate from wastewater.
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Creator Mukhopadhyay, R., Adhikari, T., Sarkar, B., Barman, A., Paul, R., Patra, A. K. & Kumar, P.
 
Subject Nitrate pollution, Water alkalinity, Nano-bentonite, Oxyanion adsorption,Wastewater treatment
 
Description Not Available
Nitrate (NO3−) and bicarbonate (HCO3−) are harmful for the water quality and can potentially create negative impacts to aquatic organisms, crops and humans. This study deals with the removal of NO3− and HCO3− from contaminated wastewater using Fe-exchanged nano-bentonite and Fe3O4 nanoparticles. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, surface area measurement and particle size analysis revealed that the adsorbents fall under the nano-scale size range with high specific surface area, and Fe was successfully exchanged in the nano-bentonite clay. The kinetics of adsorption was well defined by pseudo-first order and pseudo-second order kinetic models for both NO3− and HCO3−. The Fe-exchanged nano-bentonite was a better performing adsorbent of the oxyanions than Fe3O4 nanoparticles. According to the Sips isothermal model, the Fe-exchanged nano-bentonite exhibited the highest NO3− and HCO3− adsorption potential of 64.76 mg g-1 and 9.73 meq g-1, respectively, while the respective values for Fe3O4 nanoparticles were 49.90 mg g-1 and 3.07 meq g-1. Thus, inexpensiveness and easy preparation process of Fe-exchanged nano-bentonite make it attractive for NO3− and HCO3− removal from contaminated wastewater with significant environmental and economic benefits.
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Date 2020-03-20T06:16:31Z
2020-03-20T06:16:31Z
2019-08-15
 
Type Research Paper
 
Identifier Mukhopadhyay, R., Adhikari, T., Sarkar, B., Barman, A., Paul, R., Patra, A. K. & Kumar, P. (2019). Fe-exchanged nano-bentonite outperforms Fe3O4 nanoparticles in removing nitrate and bicarbonate from wastewater. Journal of hazardous materials, 376, 141-152. https://www.sciencedirect.com/science/article/abs/pii/S0304389419305588
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http://krishi.icar.gov.in/jspui/handle/123456789/34078
 
Language English
 
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