Asian Journal of Green Chemistry
3.8(Q2)
CiteScore
27
h-index

Modification of activated carbon by ZnCl₂, CaCl₂, MgCl₂ and their applications in removal of nitrate ion from drinking water

Document Type : Original Research Article

Authors

Homa Shafiekhani 1
Roghiyeh Barjoizadeh 2

1 Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran

2 Department of Chemistry, Lamerd Branch, Islamic Azad University, Lamerd 74311, Iran

https://doi.org/10.22034/ajgc.2018.65164
Abstract
Nitrate is one of the most crucial pollutants in the urban and rural drinking water resources. Many techniques have been used to remove these contaminants. In this study, granular activated carbon (GAC) modified with the mixture of ZnCl₂, CaCl₂ and MgCl₂ is utilized for the removal of nitrate from the water. Results of removing this adsorbent by batch method and changing the effective factors including contact time, adsorbent dose, nitrate concentration, pH, and temperature were investigated. Two theoretical adsorption isotherms namely Langmuir and Freundlich were used to describe the experimental results. The Langmuir isotherm model explained the sorption process well and showed the best coefficient of determination (0.9947). The nitrate sorption kinetic data were successfully fitted to pseudo-second order kinetic model. Adsorption was maximized between pH ranges 4-8. The overall results demonstrated potential applications of modified GAC for nitrate removal from the aqueous solutions.

Graphical Abstract

Modification of activated carbon by ZnCl₂, CaCl₂, MgCl₂ and their applications in removal of nitrate ion from drinking water

Keywords

Nitrate removal
Adsorption Isotherm
Activated carbon
Kinetic

Subjects

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Asian Journal of Green Chemistry
Volume 3, Issue 1
Winter 2019
Pages 1-12

  • Receive Date 15 April 2018
  • Revise Date 02 May 2018
  • Accept Date 05 May 2018

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