Ramli, Nazwatul Iman
(2015)
Hydrothermal preparation of biochar from lignocellulosic biomass for the practical amendment of heavy metal contaminated wastewater.
Project Report.
Pusat Pengajian Sains Kesihatan, Universiti Sains Malaysia.
(Submitted)
Abstract
The hydrothermal preparation of biochar from spent coconut kernel has been
attempted. The potential of the prepared biochar for the practical treatment of heavy
metals contaminated wastewater, specifically copper ions (Cu2+) was examined. The
physical and chemical prope11ies of coconut kernel derived biochar (CKB) were
evaluated by pore structural analysis, scanning electron microscope, elemental
analysis, and Fourier transfonn infrared spectroscopy. The elemental analysis
illustrated that the content ofC, 0 , H, N, and S was 65.33%, 20.89%, 5.02%, 8.75%, .
and 0.0 l% respectively. Adsorption experiments were carried out by varying the
adsorbent dosage, initial metal concentrations and contact time, and pH.
Experimental results manifested that the adsorptive removal of Cu2+ increased with
increasing the adsorbent dosage, initial concentration and contact time, and pH.
Maximum Cu2+ removal was observed at pH 5.5, corresponding to the adsorptive
uptake of 2.17 mg/g and ads01vtive removal of 99.65%, respectively. Experimental
data were analyzed using Langmuir, Freundlich, and Temkin isotherm models.
Adsorption data fitted to the Langmuir model, with the correlation coefficient, R~
and RMSD of 0.999 and 0.151, respectively, anticipated a maximum monolayer
ads01vtion capacity for Cu2+ ions of 88.08 mg/g. Thermodynamics analysis
suggested that adsorption of Cu2
+ onto CKB was feasible and in nature, with the
ΔG ֯ of-7.696 kJ/mol to -11.081 kJ/mol, and/1Ha and 65°were 43.61 kJ/mol and-
160.40 J/mol K, respectively. The findings revealed the potential of spent coconut
kernel biochar as an eco-friendly biosorbent for the in-situ remediation of water
pollutants were best.
Actions (login required)
 |
View Item |
