Chitosan/Zeolite Y/Nano ZrO2 nanocomposite as an adsorbent for the removal of nitrate from the aqueous solution

Published Date

Available online 27 May 2016, doi:10.1016/j.ijbiomac.2016.05.089

In Press, Accepted Manuscript — Note to users

Title 

Chitosan/Zeolite Y/Nano ZrO₂ nanocomposite as an adsorbent for the removal of nitrate from the aqueous solution

• Author 

• Abbas Teimouri ^a,,,
• Shima Ghanavati nasab ^a,b
• Niaz Vahdatpoor ^a
• Saeed Habibollahi ^a
• Hossein Salavati ^a
• Alireza Najafi Chermahini ^c

• aChemistry Department, Payame Noor University, 19395-3697, Tehran, Islamic Republic of Iran
• bDepartment of Chemistry, Shahrekord University, Shahrekord 115, Islamic Republic of Iran
• cDepartment of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran

Received 30 November 2015. Revised 1 May 2016. Accepted 25 May 2016. Available online 27 May 2016.

Highlights

• •
  Removal of nitrate ions (NO₃⁻) by CTS/ZY/Nano ZrO₂ nanocomposite as adsorbent was investigated.
• •
  Adsorbent was characterized by N₂ sorption (BET), FTIR, SEM and XRD. #XPS#z.rtrif; Effect of molar ratio, pH, temperature on adsorbent capacity and model of kinetics and isotherm was investigated.

Abstract

In the present study, a series of chitosan/Zeolite Y/Nano Zirconium oxide (CTS/ZY/Nano ZrO₂) nanocomposites were made by controlling the molar ratio of chitosan (CTS) to Zeolite Y/Nano Zirconium oxide in order to remove nitrate (NO₃⁻) ions in the aqueous solution. The nanocomposite adsorbents were characterized by XRD, FTIR, BET, SEM and TEM. The influence of different molar ratios of CTS to ZY/Nano ZrO₂, the initial pH value of the nitrate solution, contact time, temperature, the initial concentration of nitrate and adsorbent dose was studied. The adsorption isotherms and kinetics were also analyzed. It was attempted to describe the sorption processes by the Langmuir equation and the theoretical adsorption capacity (Q₀) was found to be 23.58 mg nitrate per g of the adsorbent. The optimal conditions for nitrate removal were found to be: molar ratio of CTS/ZY/Nano ZrO₂: 5:1; pH: 3; 0.02 g of adsorbent and temperature: 35 ^∘C, for 60 min. The adsorption capacities of CTS, ZY, Nano ZrO₂, CTS/Nano ZrO₂, CTS/ZY and CTS/ZY/Nano ZrO₂ nanocomposites for nitrate removal were compared, showing that the adsorption ability of CTS/ZY/Nano ZrO₂ nanocomposite was higher than the average values of those of CTS (1.95 mg/g for nitrate removal), ZY, Nano ZrO₂, CTS/Nano ZrO_2, and CTS/ZY.

Keywords

• Chitosan
• Zeolite Y
• Nano ZrO₂
• Adsorbent
• Nanocomposite
• Removal
• Nitrate

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 Table 1

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• ⁎ 
  Corresponding author at: Department of Chemistry, Payame Noor University (PNU), Isfahan, P.O. Box 81395−671, Iran.
  
  

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