title: Chitosan /Zeolite Y/Nano ZrO2nanocomposite as an adsorbent for the removal of nitrate from the aqueous solution.
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 23.58mg 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; 0.02g of adsorbent and temperature: 35°C, for 60min. The adsorption capacities of CTS, ZY, Nano ZrO2, CTS/Nano ZrO2, CTS/ZY and CTS/ZY/Nano ZrO2nanocomposites for nitrate removal were compared, showing that the adsorption ability of CTS/ZY/Nano ZrO2nanocomposite was higher than the average values of those of CTS (1.95mg/g for nitrate removal), ZY, Nano ZrO2, CTS/Nano ZrO2,and CTS/ZY.
authors.affiliation: Chemistry Department, Payame Noor University (PNU), 19395-3697, Tehran, Islamic Republic of Iran. Electronic address: a_teimouri@pnu.ac.ir.
authors.forename: Abbas
authors.initials: A
authors.lastname: Teimouri
authors.affiliation: Chemistry Department, Payame Noor University (PNU), 19395-3697, Tehran, Islamic Republic of Iran; Department of Chemistry, Faculty of Sciences, University of Shahrekord, P.O. Box 115, Shahrekord, Islamic Republic of Iran.
authors.forename: Shima Ghanavati
authors.initials: SG
authors.lastname: Nasab
authors.affiliation: Chemistry Department, Payame Noor University (PNU), 19395-3697, Tehran, Islamic Republic of Iran.
authors.forename: Niaz
authors.initials: N
authors.lastname: Vahdatpoor
authors.affiliation: Chemistry Department, Payame Noor University (PNU), 19395-3697, Tehran, Islamic Republic of Iran.
authors.forename: Saeed
authors.initials: S
authors.lastname: Habibollahi
authors.affiliation: Chemistry Department, Payame Noor University (PNU), 19395-3697, Tehran, Islamic Republic of Iran.
authors.forename: Hossein
authors.initials: H
authors.lastname: Salavati
authors.affiliation: Department of Chemistry, Isfahan University of Technology, Isfahan 841543111, Islamic Republic of Iran.
authors.forename: Alireza Najafi
authors.initials: AN
authors.lastname: Chermahini
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D007700:Kinetics; D053761:Nanocomposites / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry* / Q000302:isolation & purification*; D012996:Solutions; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification; D018508:Water Purification; D017641:Zeolites / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D009566:Nitrates; D012996:Solutions; D014874:Water Pollutants, Chemical; D017641:Zeolites; D048271:Chitosan; D015040:Zirconium; C028541:zirconium oxide
keywords: Adsorbent; Chitosan; Nano ZrO(2); Nanocomposite; Nitrate; Removal; Zeolite Y