In-situ preparation of NaA zeolite/chitosan porous hybrid beads for removal of ammonium from aqueous solution.
Inorganic/organic hybrid materials play important roles in removal of contaminants from wastewater. Herein, we used the natural materials of halloysite and chitosan to prepare a new adsorbent of NaA zeolite/chitosan porous hybrid beads by in-situ hydrothermal synthesis method. SEM indicated that the porous hybrid beads were composed of 6-8 μm sized cubic NaA zeolite particles congregated together with chitosan. The adsorption behavior of NH4(+) from aqueous solution onto hybrid beads was investigated at different conditions. The Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. A maximum adsorption capacity of 47.62 mg/g at 298 K was achieved according to Langmuir model. The regenerated or reused experiments indicated that the adsorption capacity of the hybrid beads could maintain in 90% above after 10 successive adsorption-desorption cycles. The high adsorption and reusable ability implied potential application of the hybrid beads for removing NH4(+) pollutants from wastewater.
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
Kai
K
Yang
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
Xiang
X
Zhang
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
Cong
C
Chao
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, PR China. Electronic address: zhangb@zzu.edu.cn.
Bing
B
Zhang
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
Jindun
J
Liu
D000327:Adsorption; D064751:Ammonium Compounds / Q000737:chemistry* / Q000302:isolation & purification*; D048271:Chitosan / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008863:Microspheres; D016062:Porosity; D012996:Solutions; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification; D017641:Zeolites / Q000737:chemistry*
D064751:Ammonium Compounds; D048271:Chitosan; D012996:Solutions; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical; D017641:Zeolites
Ammonium removal; Chitosan beads; Halloysite; Hydrothermal synthesis; NaA zeolite