Background: Empty fruit bunch (EFB) is a type of biomass waste product formed during
the production process of palm oil. In the present work, EFB was used to prepare a cellulose-graftcopolymer
which can be converted into poly(amidoxime)-poly(hydroxamic acid) ligands suitable for
the removal of heavy metals from electroplating wastewater.
Methods and Results: Poly(amidoxime)-poly(hydroxamic acid) ligands were synthesized from the
poly(acrylonitrile-co-methyl acrylate) grafted palm cellulose and were analyzed via FT-IR and FESEM.
The binding capacity (qe) with the metals ions such as copper (Cu2+), iron (Fe3+), cobalt
(Co2+), nickel (Ni2+) and lead (Pb2+) were 341, 290, 284, 204 and 482 mg g-1, respectively at pH 6.
The pseudo-first-order kinetic model is fitted with the results confirming heavy metal adsorption.
The isotherm study was conducted using a linear plot of the Langmuir isotherm where results were
significantly different from the experimental value (maximum adsorption, qe), indicating that adsorption
does not occur on a single layer. However, the coefficient of the correlation values obtained using
the Freundlich isotherm model were acceptable (R2>0.99), and it was concluded that adsorption
was multilayered with some metal ions.
Conclusion: The polymeric ligands synthesized here showed excellent adsorption of heavy metals
from electroplating wastewater containing a notable amount of copper and iron metal ions.