Open AccessBiosorption of CU(II) Ions by Leucaena Leucocephala Leave from Aqueous Solution
Author(s) -
M. A. Azmi,
Nur Fadhilah Khairil Mokhtar,
Noor Fazliani Shoparwe,
Haniszatul Farhana Shukor
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/765/1/012032
Subject(s) - leucaena leucocephala , adsorption , aqueous solution , chemistry , langmuir adsorption model , biosorption , langmuir , nuclear chemistry , freundlich equation , fourier transform infrared spectroscopy , inorganic chemistry , botany , chemical engineering , organic chemistry , sorption , biology , engineering
As a preliminary study, this project aims to remove the copper (Cu II) from aqueous solutions using Leucaena leucocephala leaves. Effect of free cell and immobilized form of biosorbent on adsorption capacity were evaluated in this study. Kinetic models of pseudo-first order, second order and equilibrium isotherms of Langmuir and Freundlich were used to predict the efficiency of Cu 2 + absorption by Leucaena leucocephala leaves adsorption system. The functional groups involved during the adsorption were identified using Fourier Transform Infrared (FTIR) whereby the Leucaena leucocephala leaves has the large amount of hydroxyl functional groups at the wavelength of 3411.66 cm -1 . Atomic Absorption Spectroscopy (AAS) were used to measure the metal concentration before and after the adsorption process. The maximum percentage removal of the Cu 2+ was achieved by immobilized form of Leucaena leucocephala leaves as biosorbent in aqueous solutions with a 72.3% of removal. Adsorption kinetics of pseudo-second order was well fitted with the adsorption data with the R 2 of 0.9622. In addition, the results reveal that Langmuir isotherm was the best model to explain the adsorption of Cu 2 + using immobilized Leucaena leucocephala leaves with the R 2 of 0.9974. This result showed that Leucaena leucocephala leaves as an effective and potential biosorbent for the adsorption of Cu 2 + from the wastewater.