title: Fast removal of high quantities of toxic arsenate via cationic p(APTMACl) microgels.
abstract: Hydrogels are resourceful materials and can be prepared in different morphology, size, surface charge and porosity adopting different polymerization techniques and reaction conditions. The cationic poly(3-acrylamidopropyl)trimethylammonium chloride (p(APTMACl)) microgels were synthesized by photo-initiated inverse suspension polymerization technique. These microgels were utilized as absorbents for the removal of toxic arsenate (As) from different aqueous environments. The experimental parameters affecting absorption efficiency were investigated, and it was demonstrated that these types of microgels are highly efficient in removing arsenate anions from different aqueous environments compared to the previously reported bulk hydrogel, and cryogel of the same material. A removal efficiency of approximately 97.25% was obtained by immersing 0.5 g microgel in 250 ppm 100 mL solution of arsenate anions for 60 min. Both Langmuir and Freundlich adsorption isotherms were applied to adsorption of arsenate anions by p(APTMACl) microgels, and the Langmuir isotherm was a better representation of the adsorption of arsenate with a high value of R(2) (0.9982). Furthermore, mag-p(APTMACl) microgels were synthesized for the adsorption of arsenate anions to provide easy removal of the microgel composite by using an externally applied magnetic field. Furthermore, re-usability of the p(APTMACl) microgels was also investigated for the adsorption of arsenate anions.
authors.affiliation: Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.
authors.forename: Saif Ur
authors.initials: SU
authors.lastname: Rehman
authors.affiliation: Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Siddiq
authors.affiliation: Surfactants Research Chair, Department of Chemistry College of Science, King Saud University, P.O Box-2455-Riyadh, 11451, Saudi Arabia.
authors.forename: Hamad
authors.initials: H
authors.lastname: Al-Lohedan
authors.affiliation: Chemical Engineering Department, Yuzuncu Yil University, Campus, Van, 65080, Turkey.
authors.forename: Nahit
authors.initials: N
authors.lastname: Aktas
authors.affiliation: Leather Engineering Department, Ege University, Bornova Campus, 35080, Izmir, Turkey.
authors.forename: Mehtap
authors.initials: M
authors.lastname: Sahiner
authors.affiliation: Chemistry Department, Canakkale Onsekiz Mart University, Terzioglu Campus, 17100, Canakkale Turkey.
authors.forename: Sahin
authors.initials: S
authors.lastname: Demirci
authors.affiliation: Surfactants Research Chair, Department of Chemistry College of Science, King Saud University, P.O Box-2455-Riyadh, 11451, Saudi Arabia; Chemistry Department, Canakkale Onsekiz Mart University, Terzioglu Campus, 17100, Canakkale Turkey; Nanoscience and Technology Research and Application Center (NTRAC), Canakkale Onsekiz Mart University, Terzioglu Campus, 17100, Canakkale, Turkey. Electronic address: sahiner71@gmail.com.
authors.forename: Nurettin
authors.initials: N
authors.lastname: Sahiner
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D001149:Arsenates / Q000032:analysis / Q000737:chemistry*; D002412:Cations; D020100:Hydrogels / Q000737:chemistry*; D016062:Porosity; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D014867:Water; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000180:Acrylic Resins; D001149:Arsenates; D002412:Cations; D020100:Hydrogels; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical; C000610539:poly(3-acrylamidopropyl)trimethylammonium chloride; D014867:Water; C025657:arsenic acid
keywords: Arsenic removal; Cationic microgel/nanogel; Magnetic composite microgel