Removal of Pb(II) Metal Ions from Aqueous Solutions Using Chitosan-Vanillin Derivatives of Chelating Polymers
Removal of Pb(II) Metal Ions from Aqueous Solutions Using Chitosan-Vanillin Derivatives of Chelating Polymers
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Date
2018-06-03
Authors
Alakhras, Fadi
Al-Shahrani, Hanin
Al-Abbad, Eman
Al-Rimawi, Fuad
Ouerfelli, Noureddine
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Abstract
Our study investigates the removal of Pb(II) ions found in aqueous solutions using
chitosan-vanillin polymeric material. The effects of pH, agitation time, adsorbent mass, and initial
amount of studied ion on the chelation process have been carried out using batch experiments.
The quantity of residual ions has been estimated via atomic absorption spectrometry. The polymers
are characterized using infrared spectroscopy, TGA, SEM, and BET surface area.
The highest removal of Pb(II) ions achieved by polymers I and II was at pH 6. The Langmuir
isotherm worked as the greatest explanation for the experimental outcome with highest chelation
capability equal to 23.3 mg g-1 for polymer I and 66.23 mg g-1 for polymer II. Kinetic studies
revealed that chemisorption was the rate-determining step, whereas the uptake was natural
and endothermic.
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Keywords
chitosan-vanillin Schiff base, chelating polymers, adsorption, wastewater treatment, lead removal