Bovine Serum Albumin-Coated Graphene Oxide for Effective Adsorption of Uranium(VI) from Aqueous Solutions

Abstract

Graphene oxide (GO) was modified by a carbodiimide-induced covalent cross-linking with bovine serum albumin (BSA), enriched with numerous amino and carboxyl functional groups, for radioactive uranium (U VI ) removal. The adsorbent was confirmed through scanning electron microscopy, transmission electron microscopy, Fourier transform infrared, X-ray diffraction, atomic force microscopy, and X-ray photoelectron spectroscopy (XPS). We investigated the effect of factors such as the pH, contact time, and initial concentration on the adsorption of U VI . In this work, the adsorption process closely fitted the Langmuir isotherm model, and pseudo-second-order indicates that chemical adsorption dominates the adsorption process of U VI onto GO− BSA composites. These results show that the optimal adsorption amount of U VI of GO− BSA composites was 389 mg g −1 at 298.15 K, pH = 6, C 0 = 200 mg L −1 , and t = 80 min. According to kinetics and the thermodynamic model as well as XPS analysis of pre-and postadsorption of U VI , we propose that the adsorption behavior of U VI onto GO−BSA adsorbent is divided into two stages: (1) chelation of the organic functional groups onto the surface of GO−BSA with U VI ; (2) movement of U VI into the interior of the material after adsorption onto the surface. Moreover, the composites exhibit good adsorption efficiency in simulated seawater, indicating the potential of GO−BSA composites for U VI removal from seawater.

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

“…U, Th, Sc, Nd; catalytic materials such as Pd, Pt; emerging materials in waste streams including Se and Mn. For the adsorption of U (VI), GO-BSA showed good regeneration efficiency showing the potential for reusability [173]. Additionally, rGO/LDH's adsorption capacity remained at 97.2% after three cycles [174].…”

Facile green synthesis of bismuth sulfide radiosensitizer via biomineralization of albumin natural molecule for chemoradiation therapy aim

“…43-1471) [27,28]. The BSA coating was confirmed by the appearance of the broad and moderately strong peak at the range of 20-29 which has been assigned to XRD pattern of the BSA [29].…”

In Situ Anchoring of Pyrrhotite on Graphitic Carbon Nitride Nanosheet for Efficient Immobilization of Uranium

“…Specifically,a na dsorbent with high adsorption efficiency should be studied. As eries of adsorbent materials have been designed by our group for adsorptiono fU VI such as carbon-based adsorbents, [5] polymerbased adsorbents, [6] metal oxide adsorbents, [7] metal-organic framework (MOF) adsorbents, [3b, 8] and graphene-based adsorbents, [9] and some good results have been achieved, promoting the developmento fu ranium extraction from seawater.I na ddition to these materials, 2D graphene-like layered materials have attracted researchers'a ttention, including hexagonal boronn itride (h-BN), carbon nitride (g-C 3 N 4 ), black phosphorus (BP), transitionm etal dichalcogenides( TMDs), MXenes, and so on. They have almost thes ame structures and properties as graphene, including:a )ano rdered structure;b )growth in a two-dimensional plane;c )anu ltrathin structure in the third dimension.…”