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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
Not Available
 
Creator Not Available
Raj Mukhopadhyay, Tapan Adhikari, Binoy Sarkar, Arijit Barman, Ranjan Paul, Ashok K. Patra, Parbodh C. Sharma, Parveen Kumar
 
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 nanobentonite
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 nanobentonite
make it attractive for NO3
− and HCO3
− removal from contaminated wastewater with significant
environmental and economic benefits.
Not Available
 
Date 2019-10-15T04:02:02Z
2019-10-15T04:02:02Z
1001-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/23359
 
Language English
 
Relation Not Available;
 
Publisher Not Available