Kinetic and thermodynamic studies of U(VI) adsorption using Dowex-Marathon resin

Amidoxime‐modified polyacrylonitrile nanofibrous films (AOPAN NFs) were prepared via an electrospinning technique. The traditional preparation methods for amidoximated polyacrylonitrile (AOPAN) solution were changed and improved. First, the PAN solution was modified by hydroxylamine hydrochloride to produce an AOPAN solution, and then, a small amount of inhibitor was added to the AOPAN solution for electrospinning. We found that the crosslinking of the AOPAN solution was inhibited by the addition of a small amount of inhibitor; at the same time, the storage time of the AOPAN solution was prolonged. In addition, the prepared AOPAN solution was electrospun into nanofibrous films, which could be used as excellent adsorption materials for Cu(II), Pb(II), and methyl orange (MO) after drying. The maximal adsorption capacities for Cu(II), Pb(II), and MO were 143.47, 178.57, and 68.07 mg/g, respectively. The adsorption capacities of the nanofibrous films were more than 50% that of the first adsorption after four recycling runs; this indicated the reusability of the nanofibrous films for water treatment. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45697.

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“…The pseudo‐first‐order equation is as follows:

\ln (q_{e} - q_{t}) = \ln q_{e} - k_{1} t

where q t is adsorption of metal ions and dyes at time t (mg/g) and k 1 (h −1 ) is the rate constant of pseudo‐first‐order adsorption.…”

Section: Resultsmentioning

confidence: 99%

Preparation of amidoxime‐modified polyacrylonitrile nanofibrous adsorbents for the extraction of copper(II) and lead(II) ions and dye from aqueous media

Ren

Yan

Liu

et al. 2017

J of Applied Polymer Sci

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“…Resins have a wide range of application due to the diversity of compounds that are capable to retain. Their use consist in the selective adsorption of the compound of interest present in a mixture [20]- [24] (for example, lactic acid [20], [25], phenolic acids [26], lactoperoxidase [27], and longchain fatty acids [28], [29]). The resins can be regenerated using a solution capable of exchanging the acid adsorbed, allowing its reuse [5], [18].…”

Section: Introductionmentioning

confidence: 99%

“…The versatility of amine resins allows their use in a wide range of pH and temperature conditions, maintaining their stability under most common processing conditions, and in the recovery of various compounds [30]. Among these resins, Dowex™ Marathon™ WBA and Dowex™ Marathon™ MSA are amine resins commonly used in water demineralization; technetium, uranium and iron recovery [21], [23], [24]; lactic acid recovery [6]; and ionic liquids purification [22]. The main differences between the resins are that the WBA is a weak base anion resin while the MSA is a strong base anion resin.…”

Section: Introductionmentioning

confidence: 99%

Citric Acid Recovery from a Synthetic Fermentation Broth by Ion- Exchange Resins

Jacinto

Ramos

López³

2021

BISTUA

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Un método de adsorción utilizando la resina Dowex™Marathon™ WBA ha sido desarrollado con el fin de evaluar larecuperación de ácido cítrico producido por fermentación sumergida. Para determinar la viabilidad de este método de separación, la resina fue evaluada a diferentes condiciones de temperatura (30 – 70 °C) y pH (1.5 – 6.5). Los resultadosmostraron que a pH bajo, se mejora la adsorción de ácido cítrico, a través de la cual, se recupera el 85% del ácido y se obtiene una pureza del 92%. Esto representa una capacidad máxima de adsorción de 0.46 g de ácido cítrico por gramo de resina empleada.

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Equilibrium and kinetics of calcium–uranyl–carbonate adsorption on silica nanoparticles

Saleh

Yun

2017

J Radioanal Nucl Chem

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Kinetic and thermodynamic studies of U(VI) adsorption using Dowex-Marathon resin

Cited by 7 publications

References 23 publications

Preparation of amidoxime‐modified polyacrylonitrile nanofibrous adsorbents for the extraction of copper(II) and lead(II) ions and dye from aqueous media

Preparation of amidoxime‐modified polyacrylonitrile nanofibrous adsorbents for the extraction of copper(II) and lead(II) ions and dye from aqueous media

Citric Acid Recovery from a Synthetic Fermentation Broth by Ion- Exchange Resins

Equilibrium and kinetics of calcium–uranyl–carbonate adsorption on silica nanoparticles

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