@article { author = {Parsaeian, Mohammad Reza and Dadfarnia, Shayessteh and Haji Shabani, Ali Mohammad and Hafezi Moghaddam, Reza}, title = {Synthesize of Iron-Polyphenol Nanohydrogel from Melia Azedarach Fruit Extract and its Application as a Flocculant for Coagulation and Removal of Disperse Yellow 211}, journal = {Analytical and Bioanalytical Chemistry Research}, volume = {9}, number = {1}, pages = {101-111}, year = {2022}, publisher = {Iranian Chemical Society}, issn = {2383-093X}, eissn = {2383-093X}, doi = {10.22036/abcr.2021.286985.1637}, abstract = {Melia azedarach fruit extract is used to synthesize iron-polyphenol nanohydrogel and its capability as a flocculant in coagulation and removal of Disperse Yellow 211 dye from the aqueous solution is examined. The structure of iron-polyphenol nanohydrogel is studied by Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller analysis, and zeta potential. The field emission scanning electron microscopy analysis indicates that in situ-cross-linking of polyphenols of Melia azedarach extract by ferric ions resulted in the formation of nanohydrogel containing particles in the range of 23-35 nm. Experiments confirmed that the prepared iron-polyphenol nanohydrogel has the excellent ability as the flocculant for coagulation and removal of the Disperse Yellow 211 dye in the pH range of 4.0-8.0, at room temperature. The required time for obtaining equilibrium at different concentrations of dye is ~ 50 minutes, and in this period, 200 mg L-1 of dye solution is 92% decolorized. The best-fitted model for experimental data is found to be the second-order kinetics and Langmuir thermodynamic indicating the sorption occurs in a monolayer and is governed by chemisorption. The maximum capacity of the sorbent is 1111.1 mg g-1.}, keywords = {Green synthesis,Iron-polyphenol complex,Nanohydrogel,Adsorptive flocculation,Melia azedarach fruit,Disperse Yellow 211 dye}, url = {https://www.analchemres.org/article_137593.html}, eprint = {https://www.analchemres.org/article_137593_ce2a8cba73690657c909d0348a31982c.pdf} }