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A novel low-cost adsorbent named chitosan/Al(OH)(3)center dot(CS/Al(OH)(3)) bead was successfully prepared by employing -AlCl3 center dot 6H(2)O aqueous solution as the solvent for CS. The CS/Al(OH) 3 beads were used for fluoride removal from water. The beads were synthesized using the chitosan and aluminum chloride with the mass ratio of 2:1 as the precursor and in situ generation of aluminum hydroxide sorbents in sodium hydroxide solution. Then, the beads were washed with distilled water to neutral and freeze dried. The sorbents were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX), Fourier transform infrared spectrometry (FTIR), and X-ray diffractometry (XRD), respectively. Batch adsorption experiments were conducted to evaluate the parameters that affected the defluoridation capacity. The influencing parameters including pH, co-existing ions in water and initial temperature of the adsorption process were studied. The influence of temperature confirmed that the adsorption was spontaneous and endothermic. The adsorption isotherm of fluoride followed Langmuir isotherm model and the sorption kinetics was more suitable for pseudo-second-order kinetic model. The defluoridation capacity of chitosan/Al(OH)(3) calculated using Langmuir model was 23.06 mg/g (293 K, pH 4). The experimental results showed that the CS/Al(OH)(3) bead adsorbent is promising for the fluoride adsorption.
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IRANIAN POLYMER JOURNAL
ISSN: 1026-1265
Year: 2018
Issue: 4
Volume: 27
Page: 253-261
1 . 7 0 7
JCR@2018
2 . 4 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
ESI HC Threshold:209
JCR Journal Grade:3
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 27
SCOPUS Cited Count: 30
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
Affiliated Colleges: