Removal of nitrate and phosphate using chitosan/Al2O3/Fe3O4composite nanofibrous adsorbent: Comparison with chitosan/Al2O3/Fe3O4beads.
In the present study the chitosan/Al2O3/Fe3O4composite nanofibrous adsorbent was prepared by electrospinning process and its application for the removal of nitrate and phosphate were compared with chitosan/Al2O3/Fe3O4composite bead adsorbent. The influence of Al2O3/Fe3O4composite content, pH, contact time, nitrate and phosphate initial concentrations and temperature on the nitrate and phosphate sorption using synthesized bead and nanofibrous adsorbents was investigated in a single system. The reusability of chitosan/Al2O3/Fe3O4composite beads and nanofibers after five sorption-desorption cycles were carried out. The Box-Behnken design was used to investigate the interaction effects of adsorbent dosage, nitrate and phosphate initial concentrations on the nitrate and phosphate removal efficiency. The pseudo-second-order kinetic model and known Freundlich and Langmuir isotherm models were used to describe the kinetic and equilibrium data of nitrate and phosphate sorption using chitosan/Al2O3/Fe3O4composite beads and nanofibers. The influence of other anions including chloride, fluoride and sulphate on the sorption efficiency of nitrate and phosphate was examined. The obtained results revealed the higher potential of chitosan/Al2O3/Fe3O4composite nanofibers for nitrate and phosphate compared with chitosan/Al2O3/Fe3O4composite beads.
Department of Textile, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
Farahnaz
F
Bozorgpour
Iranian Academic Center for Education, Culture and Research (ACECR), Esfahan branch, Institute of higher education, Iran.
Hossein Fasih
HF
Ramandi
Department of Civil and Environmental Engineering, University of Houston, 4800 Calhoun, Houston, TX 77204-4003, USA.
Pooya
P
Jafari
Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran.
Saman
S
Samadi
Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran.
Shabnam Sharif
SS
Yazd
Department of Chemical Engineering, Islamic Azad University, Birjand Branch, Birjand, Iran. Electronic address: m.aliabadi@iaubir.ac.ir.
Majid
M
Aliabadi
D000327:Adsorption; D000537:Aluminum Oxide / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry / Q000302:isolation & purification; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008863:Microspheres; D057139:Nanofibers / Q000737:chemistry; D009566:Nitrates / Q000737:chemistry* / Q000302:isolation & purification*; D010710:Phosphates / Q000737:chemistry* / Q000302:isolation & purification*; D013696:Temperature
D004785:Environmental Pollutants; D009566:Nitrates; D010710:Phosphates; D048271:Chitosan; D000537:Aluminum Oxide; D052203:Ferrosoferric Oxide
Beads; Chitosan/Al(2)O(3)/Fe(3)O(4); Nanofiber; Nitrate; Phosphate