Binding of Uranyl Ions by Water-Insoluble Polymers Containing Multiligand Groups

Abstract

ReagentsAcrylic acid (AA, Merck), 4-Acryloylmorpholine (AMo, 97% Aldrich), 4-vinyl pyridine (VPy, 95% Aldrich), 1,4-divinylbenzene (DVB, Fluka), N-(3-dimethylamino)propylmethacrylamide (NDAPA, Aldrich), 3-dimeth ylamino)propylacrylate (DAPA, Aldrich) were purified by distillation. 2,2'-Azoisobutyronitrile (AIBN, Merck) was recrystallized from methanol, N,N'-methylene-bis-acrylamide (MBA, 99% Aldrich) and ammonium persulfate (AP, 95% Aldrich) were used without further purification.The analytical grade, copper(II) nitrate, uranyl acetate, nitric acid, perchloric acid, sodium hydroxide and sodium carbonate were purchased from Merck.Synthesis of the resins P(NDAPA), P(DAPA), P(AMo-AA), P(NDAPA-AA), P(NDAPA-VPy), and P(DAPA-AA)The resins P(NDAPA), P(DAPA), P(AMo-AA), P(NDAPA-AA), P(NDAPA-VPy), and P(DAPA-AA) were synthesized by radical polymerization by mixing the corresponding reagents in a polymerization flask as follows:P ( BINDING OF URANYL IONS BY WATER-INSOLUBLE POLYMERS ABSTRACTThe crosslinked resins poly(N-(3-dimethylamino)propylmethacrylamide) P(NDAPA), poly((3-dimethylamino)propylacrylate)P(DAPA), poly(4-acryloylmorpholine-co-acrylic acid) P(AMo-AA), poly(N-(3-dimethylamino)propylmethacrylamide-co-4-vinyl pyridine) P(NDAPA-VPy) and poly((3-dimethyl amino)propylacrylate-co-acrylic acid) P(DAPA-AA), poly(N-(3-dimethylamino)propylmethacrylamide-co-acrylic acid) P(NDAPA-AA) were obtained by radical polymerization. These resins were completely insoluble in water. The uptake metal ion properties were studied by batch equilibrium procedure for copper(II) and uranyl ions. The polymerization mixtures were kept under nitrogen at 70ºC for 8 h (see Scheme 1). Then methanol was added and the resin was removed from the flask, filtered and washed with abundant water. The resin was dried under vacuum at 40ºC and then milled and sized by screening. The fraction with mesh size in the range of 250-500 mm was chosen.

Materials for the Recovery of Uranium from Seawater

“…A modest uranium uptake of 0.018 mg of uranium/g of adsorbent is likely attributable to the intense hydrophobicity of the adsorbent. Similar performance was reported by an insoluble cross-linked resin formed from poly­( N -(3- dimethylamino)­propylmethacrylamide), formed by radical polymerization . While the aforementioned adsorbents are unlikely to be directly applicable for seawater uranium recovery, the work does provide a good negative result corroborating the need for both hydrophilicity and appropriate uranyl-binding receptors.…”

“…Similar performance was reported by an insoluble cross-linked resin formed from poly(N -(3-dimethylamino)- propylmethacrylamide), formed by radical polymerization. 147 While the aforementioned adsorbents are unlikely to be directly applicable for seawater uranium recovery, the work does provide a good negative result corroborating the need for both hydrophilicity and appropriate uranyl-binding receptors. Dipropionitrile acrylamide was polymerized through free radical polymerization by application of the chemical initiator 2,2′-azobis(2-methylpropionitrile), more commonly known as AIBN (Figure 26).…”

The Performance of Graphite/N-Graphene and Graphene/N-Graphene as Electrode in Primary Cell Batteries

“…In N-Graphene, the nitrogen atom replaces the carbon atom where there is a peak appeared at 1573, 1396 and 1033 cm -1 in the N-Graphene correspond to the strong and sharp peak C=C, C-N and C-O stretching bond,respectively. This indicates that N-Graphene is formed 26 . FTIR spectra of Graphite/N-Graphene and Graphene/N-Graphene were shown by Fig.…”

Poly(HEMA) Microbeads with Multi Amine Surface Functions for Reversible Metal Complex Formation

“…Therefore, the use of polymer resins with special metal chelating groups is essential to attain metal free water. Generation of metal chelating centers on polymer microbeads is attractive to collect metal ions from water …”

“…Thanks to newly developed living polymerization techniques that made creation of chelating brushes on the microbeads. Many ways can be suggested for generating metal trapping centers on polymers . Kantipuly et al reported separation of trace metals by chelating with polymeric resins .…”