Uranyl ions uptake on poly(AAc/AAm)-cl-N,N-MBAAm hydrogel

Raj, Lok; Chauhan, Ghanshyam S.

doi:10.1007/s00289-009-0183-3

Cited by 12 publications

(5 citation statements)

References 25 publications

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“…However, amino-functionalized cross-linked polyacrylamide shows very low adsorption capacity (68.6 mg/g), and biobased polymer shows relatively high adsorption capacity (420.2 mg/g) . In addition, the adsorption capacity for U of acrylic-, maleic-, or acrylamide-based materials at acidic pH was in the range of 156 to 476.2 mg/g. − However, four polymeric adsorbents at slightly acidic pH 6 and 7 , and at alkaline pH (8 and 8.2) , are presented for better clarification. These adsorbents show very low U adsorption capacities of 13.63, 46.74, 173.8, and 369.5 mg/g compared to those developed in the present work.…”

Section: Resultsmentioning

confidence: 99%

Efficient Adsorption and Desorption of Uranium(VI) Using a Polymeric Adsorbent: A Combined Theoretical and Experimental Approach with Real-Life Alkaline Leach Liquor

Das,

Jana,

Das

et al. 2024

Ind. Eng. Chem. Res.

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Alkaline leaching is used for the extraction of uranium from rarely available carbonate ore. A hyperbranched cross-linked polymeric adsorbent (HCPA) was developed for selective recovery of uranium(VI) (U) from real-life alkaline leach liquor. HCPA was synthesized using the free radical copolymerization of acrylamide and N, N-methylene bis(acrylamide). In addition, potassium persulfate (as the initiator) and dodecanethiol (as the brancher) were used to transfer the radicals for faster chain formation and smooth branching of the long-chain polymer. Several methods were used extensively to characterize the adsorbent. The Langmuir maximum U adsorption capacity of HCPA was 1012 mg/g at 303 K, and 98% of U was removed from alkaline leach liquor. U was adsorbed at pH 8.5 in the presence of various interfering co-ions and desorbed at pH 11.5 in the form of sodium diuranate (Na 2 U 2 O 7 ) precipitate. The adsorption was monolayer, exothermic, and spontaneous in nature. The C−N, CO− NH 2 , and C−OH groups of HCPA interacted with uranyl ions initiating the coordinative and electrostatic interactions leading to U adsorption. Continuous fixed-bed column runs were performed using the actual leach liquor, and a fundamental kinetic model was used to quantify the performance of columns. The transport parameters were estimated from the model, and scaling-up calculations were performed using these parameters. Five adsorption−desorption cycles were conducted to determine the reusability and structural stability of the synthesized polymeric adsorbent.

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Section: Resultsmentioning

confidence: 99%

Efficient Adsorption and Desorption of Uranium(VI) Using a Polymeric Adsorbent: A Combined Theoretical and Experimental Approach with Real-Life Alkaline Leach Liquor

Das,

Jana,

Das

et al. 2024

Ind. Eng. Chem. Res.

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“…It has been reported in the literature that the hydrogels are highly efficient in sorption of Uranium (VI) ion from aqueous systems, of which acrylamide‐maleic acid based hydrogels were developed by Akkas et al and achieved removal capacity of 156 mg.g − 1 ; poly(acrylic acid‐co‐acrylamide)‐cl‐N,N‐methylene bis acrylamide hydrogels were developed by Chauhan et al and reported the max adsorption capacity 236.6 mg.g − 1 . Ion imprinted hydrogels were developed by Yunhai Liu et al by using hydrogel membranes of chitosan/poly(vinyl alcohol) and reported the max adsorption capacity of 156 mg.g − 1 .…”

Section: Resultsmentioning

confidence: 99%

“…Hence many researchers have used hydrogels for Uranium (VI) ion removal because of flexible properties as mentioned above. Recently, extensive research has been made to develop new hydrogels for uranium removal …”

Section: Introductionmentioning

confidence: 99%

“…Recently, extensive research has been made to develop new hydrogels for uranium removal. [25][26][27][28] The sorption ability of metal ions can be improved by structural modification of polymeric matrices through incorporation of new functionalities followed by changing external physical parameters. For the present work multichelating hydrogels were developed (poly(acrylamide-co-hydroxyethylacrylate-co-N-(2-aminothiozolyl) maleamic acid-cl-methylenebisacrylamide)) (PAHAM) using radical polymerization and used for removal of Uranium (VI) ion from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

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Aminothiozolyl maleamic acid based multi chelating hydrogels for the separation of uranium (VI) ions from aqueous environment

Reddy

Rao

et al. 2016

Polymers for Advanced Techs

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Multi chelating hydrogels (MCHs) were synthesized using a simple radical polymerization method from acrylamide, hydroxyethyl acrylate, and N-(2-aminothiozolyl)maleamic acid (AMA) monomers, methylenebisacrylamide (MBA) a cross-linker, and azobisisobutyronitrile (AIBN) an initiator. The resulting MCHs were characterized with Fourier transform infrared spectroscopy and scanning electron microscopy to confirm the formation and morphological properties. The MCHs were highly swellable in aqueous solutions as well as different pH conditions. MCHs were applied to evaluate uptake behavior of Uranium (VI) ion from aqueous solutions. Batch adsorption studies were performed by varying experimental conditions like contact time, pH, and initial metal ion concentration. The kinetics data was best suited with the second-order equation model. The equilibrium adsorption data was correlated with Langmuir and Freundlich isotherm models. This study suggests that maximum Uranium (VI) ion uptake has been found to be 288 mg.g À1 and regenerated for 5 cycles without any significant change.

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“…The comparison obviously showed that these modified polymers synthesized in our laboratory should be considered amongst the favourite adsorbents. 13 Sulfonated phenol-formaldehyde 31 2-Acrylamido-2-methylpropane sulfonic acid 32 Amidoximated pine ibark 33 Poly(AAc/AAm)-cl-N,N-MBAAm 34 Chitosan/PVA hydrogel 35 Poly(acrylamidoxime-co-(1-(2-pirydylazo)-2naphtyl-2-methacrylate)-co-methacrylic acid) 36,37…”

Section: Reusability and Storage Abilitymentioning

confidence: 99%

Removal of UO2 2+ from Aqueous Solutions by Maleic Anhydride-Styrene-vinyl acetate Terpolymer Modified with Ethylenediamine and Diethylenetriamine

Şimşek¹,

Yılmaz²

2013

Asian J. Chem.

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Maleic anhydride-styrene-vinyl acetate (MA-S-VA) terpolymer was prepared. It was modified by ethylenediamine (EDA) and diethylenetriamine (DETA) in order to get cross-linked polymers bearing carboxyl and amine groups. They were shown as MA-S-VA-EDA and MA-S-VA-DETA, and used as an adsorbent for the removal of UO2 2+ from water. The characterizations of structures of all the polymers were performed by Fourier transform infrared. The adsorptive features of adsorbents were then investigated for UO2 2+ in view of dependency on ion concentration, temperature and kinetics. Experimentally obtained isotherms were evaluated with reference to Langmuir, Freundlich and Dubinin-Radushkevich models. The maximum monolayer adsorption capacity for UO2 2+ was found to be 0.58 and 2.56 mol kg -1 for MA-S-VA-EDA and MA-S-VA-DETA, respectively. It is suggested that the new modified polymers prepared in our laboratory as new adsorbents for uranyl ions.

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Uranyl ions uptake on poly(AAc/AAm)-cl-N,N-MBAAm hydrogel

Cited by 12 publications

References 25 publications

Efficient Adsorption and Desorption of Uranium(VI) Using a Polymeric Adsorbent: A Combined Theoretical and Experimental Approach with Real-Life Alkaline Leach Liquor

Efficient Adsorption and Desorption of Uranium(VI) Using a Polymeric Adsorbent: A Combined Theoretical and Experimental Approach with Real-Life Alkaline Leach Liquor

Aminothiozolyl maleamic acid based multi chelating hydrogels for the separation of uranium (VI) ions from aqueous environment

Removal of UO2 2+ from Aqueous Solutions by Maleic Anhydride-Styrene-vinyl acetate Terpolymer Modified with Ethylenediamine and Diethylenetriamine

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