Pb(II) Adsorption onto Urea Treated Leucaena leucocephala Leaf Powder: Characterization, Kinetics and Isotherm Studies

The use of Leucaena leucocephala leaf powder treated with urea (treated-ULLP) as an alternative adsorbent for the adsorption of Pb(II) ions has been investigated. The adsorption studies were performed under batch mode and focused on the effects of pH, adsorbent dosage and initial Pb(II) concentratio...

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Bibliographic Details
Published in:Nature environment and pollution technology 2020-03, Vol.19 (1), p.311-318
Main Authors: Mansur, Noor Fhadzilah, Hanafiah, Megat Ahmad Kamal Megat, Ismail, Mardhiah
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Correlation coefficient
Correlation coefficients
Fourier transforms
Functional groups
Infrared spectrophotometers
Ions
Isotherms
Kinetics
Lead
Leaves
Leucaena leucocephala
Urea
Ureas
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Summary:The use of Leucaena leucocephala leaf powder treated with urea (treated-ULLP) as an alternative adsorbent for the adsorption of Pb(II) ions has been investigated. The adsorption studies were performed under batch mode and focused on the effects of pH, adsorbent dosage and initial Pb(II) concentrations. The pseudo-second order kinetics model fitted well the adsorption data with the values of correlation coefficient (R2) > 0.97. Large amounts of hydroxyl, carboxyl and amine as detected by the Fourier transform infrared (FTIR) spectrophotometer suggested that these functional groups were responsible for the adsorption of Pb(II) ions. Treated-ULLP demonstrated a good potential for Pb(II) ions removal with the maximum adsorption capacity of 90.09 mg/g, calculated from the Langmuir isotherm model.
ISSN:0972-6268
2395-3454