Synthesis of bioinspired sorbent and their exploitation for methylene blue remediation

Fazal Haq, Mehwish Kiran, Sampath Chinnam, Arshad Farid, Rizwan Ullah Khan, Ghazanfar Ullah, Ahmed Muteb Aljuwayid, Mohamed A. Habila, Muhammad Mubashir

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In this research article, novel starch phosphate grafted polyvinyl imidazole (StP-g-PIMDZs) was synthesized. Firstly, a phosphate group was attached to starch polymer via a phosphorylation reaction. Next, 1-vinyl imidazole (VIMDZ) was grafted on the backbone of starch phosphate (StP) through a free radical polymerization reaction. The synthesis of these modified starches was confirmed by 1H NMR, 31P NMR and FT-IR techniques. The grafting of vinyl imidazole onto StP diminished the crystallinity. Due to the insertion of the aromatic imidazole ring, the StP-g-PIMDZs demonstrated greater thermal stability. The StP and StP-g-PIMDZs were used as sorbents for the adsorption of methylene blue dye (MBD) from the model solution. The maximum removal percentage for starch, StP, StP-g-PIMDZ 1, StP-g-PIMDZ 2 and StP-g-PIMDZ 3 was found to be 60.6%, 66.7%, 74.2%, 85.3 and 95.4%, respectively. The Pseudo second order kinetic model and Langmuir adsorption isotherm were best suited to the experimental data with R2 = 0.999 and 0.99, respectively. Additionally, the thermodynamic parameters showed that the adsorption process was feasible, spontaneous, endothermic and favored chemi-sorption mechanism.
Original languageEnglish (US)
StatePublished - Apr 1 2023
Externally publishedYes


Dive into the research topics of 'Synthesis of bioinspired sorbent and their exploitation for methylene blue remediation'. Together they form a unique fingerprint.

Cite this