title: Synthesis and implementation of nano-chitosan and its acetophenone derivative for enhanced removal of metals.
abstract: In the present study, nano-chitosan (Nano-Ch) was synthesized by ionic gelation of chitosan/tripolyphosphate system and successfully modified with acetophenone via Schiff's base condensation to produce nano-chitosan-modified-actophenone (Nano-Ch-Ac). The produced nano-materials were characterized by FT-IR, SEM, HR-TEM and TGA techniques. The average particle sizes were found in the range of 5.20-14.54nm based on the HR-TEM analysis. The metal interaction properties of Nano-Ch and Nano-Ch-Ac with Cu(II), Cd(II), Hg(II) and Pb(II) were compared in presence of various experimental parameters. Nano-Ch-Ac sorbent was found more superior in the extraction processes of all examined metal ions under the evaluated experimental parameters. This trend was confirmed from the highest determined metal sorption capacity values of metal ions as 1298-1608 and 810-1236μmolg(-1) in pH 7.0 by Nano-Ch-Ac and Nano-Ch sorbents, respectively. The adsorption equilibrium was established at 30.0min of contact time by the two nano-chitosan sorbents. The superiority of Nano-Ch-Ac was also confirmed from the dynamic applications of this nano-sorbent for removal of divalent metal ions from tap water, sea water and industrial wastewater (91.3-100.0±1.0-3.0).
authors: Faculty of Science, Chemistry Department, Alexandria University, P.O. Box 426, Alexandria 21321, Alexandria, Egypt. Electronic address: memahmoud10@yahoo.com.
authors: Mohamed E
authors: ME
authors: Mahmoud
authors: Laser Science and Interaction Department, National Institute of Laser Enhanced Science, Cairo University, P.O. Box 12613, Giza, Egypt. Electronic address: mabou202@hotmail.com.
authors: Maram T H
authors: MT
authors: Abou Kana
authors: Faculty of Science, Chemistry Department, Alexandria University, P.O. Box 426, Alexandria 21321, Alexandria, Egypt; Holding Company for Water and Wastewater (HCWW), Cairo, Egypt. Electronic address: abohendy94@gmail.com.
authors: Ahmed A
authors: AA
authors: Hendy
mesh_terms: D000098:Acetophenones / Q000737:chemistry*; D000327:Adsorption; D002413:Cations, Divalent / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry
chemical_list: D000098:Acetophenones; D002413:Cations, Divalent; D007477:Ions; D008670:Metals; D048271:Chitosan; C038699:acetophenone
keywords: Acetophenone; Characterization; Comparative removal; Divalent metal ions; Nano-chitosan