value-added material with ionic receptors for use in the removal of toxic metal ions from wastewater.
This 3D polymer is a promising adsorbent for large-scale application, since it is a low-cost material
made from agricultural waste and showed exceptional performance. The synthesis of the network
polymer involved the carboxymethylation of OISW and curing of the carboxymethylated OISW at an
elevated temperature to promote the formation of ester linkages between OISW’s components. FT-IR,
atomic force microscopy, and thermal analysis were performed on the crosslinked product. The
adsorption efficiency of the crosslinked carboxymethylated OISW toward Pb(II), Cu(II), and other
toxic metal ions present in sewage was evaluated as a function of adsorbent dose, temperature,
pH, time, and initial metal ion. The percentage removal of about 20 metal ions present in a sewage
sample collected from a sewer plant located in the Palestinian Territories was determined. The
adsorption efficiency did not drop even after six cycles of use. The kinetic study showed that the
adsorption process follows the Langmuir isotherm model and the second-order adsorption rate.
The experimental Qe values of 13.91 and 13.71 mg/g were obtained for Pb(II) and Cu(II) removal,
respectively. The thermodynamic results confirm the spontaneous metal bonding to the receptor sites
of the crosslinked carboxymethylated OISW.

Title

Polymer

Publisher

MDPI

Publisher Country

Sweden

Indexing

Scopus

Impact Factor

5.0

Publication Type

Online only

Volume

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Year

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Pages

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