Removal Of Uranium Research Articles

Effective capture of aqueous uranium using a novel magnetic goethite: Properties and mechanism

A large amount of uranium-containing wastewater is produced by the nuclear industry, which causes harm to human health and the environment. Goethite (α-FeOOH) is highly insoluble in water and has a net positive surface charge, making it an effective sorbent for metal–anion complexes in aqueous solutions. In this study, goethite (α-FeOOH) and Fe2+-modified magnetic goethite (M-α-FeOOH) were prepared using an easy one-pot chemical precipitation method and used to remove uranium from solution. The adsorbents were characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), BET surface area analysis, fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometry (VSM). When Fe2+ partially substitutes for Fe3+, the material is magnetic, has a larger specific surface area and can be rapidly separated in a magnetic field. The uranium adsorption performance of M-α-FeOOH was substantially better than that of α-FeOOH, and its maximum adsorption capacity increased by 46.09%. The data fitted well with the quasi-second order kinetic model and the Langmuir isothermal adsorption model. According to the results of this study, the increase in the uranium removal performance of M-α-FeOOH was attributed to its higher specific surface area, better dispersion, and larger quantity of activated adsorption sites. These results, along with its low-cost, environmentally friendly, and facile synthesis, reveal M-α-FeOOH is a promising material for uranium capture.

TiO2 Nanowire Arrays in situ Grown on Ti Foil Exhibiting Superior Uranyl-Adsorption Properties

TiO2 nanowire arrays in situ grown on Ti foil (TiO2/Ti) were prepared to remove uranium (VI) from aqueous solution. As the Ti foil serves as a carrier for TiO2, the TiO2/Ti adsorbent can be effortlessly retrieved from aqueous solutions by tweezers after adsorption. The presence of TiO2 nanowire arrays on Ti foil was verified by X-ray diffraction and scanning electron microscopy. Parameters in the adsorption process were fully evaluated, including solution pH, contact time, temperature, and uranium (VI) concentration. The adsorption was most efficient in the pH range of 5.0 to 9.0. The maximum uranium (VI) adsorption capacity of TiO2/Ti, based on the Langmuir model, was 354.5 mg g–1 at pH 5.0 and T = 323 K. Thermodynamic parameters showed that the adsorption of uranium (VI) on TiO2/Ti is endothermic and spontaneous. The adsorption capacity of TiO2/Ti remained essentially unchanged after three adsorption–desorption cycles in uranium (VI) solutions. Our results support the application of this adsorbent to removal of uranium (VI) from diversified aqueous samples.

Biogene-derived aerogels for simultaneously selective adsorption of uranium(VI) and strontium(II) by co-imprinting method

• The concept of simultaneously selective adsorption is proposed for the first time. • The adsorbent is synthesized by co-imprinting method from biogenic materials. • The adsorbent shows excellent selectivity towards both U(VI) and Sr(II) ions. • The adsorption capacity can reach 317 mg U/g and 160 mg Sr/g simultaneously. Recovery of multiple radionuclides from radioactive effluents is extremely important for either environmental protection or sustainable development of nuclear energy. In this work, we report a strategy of simultaneously selective removal of uranium(VI) and strontium(II) from simulative highly saline low level radioactive effluents employing co-imprinting method. Specifically, a novel aerogel (U/Sr-IP) is imprinted with uranium(VI) and strontium(II) from biogenic dopamine and sodium alginate. The aerogel shows better selectivity for uranium(VI) and strontium(II) against other cations compared with non-imprinted polymer. The maximum adsorption capacities are calculated from Langmuir models to be 317 and 160 mg/g for uranium(VI) and strontium(II), respectively. Simultaneously selective adsorption of uranium(VI) and strontium(II) saves the time and space in dealing with complex radioactive wastewater. Noteworthily, when the concentration of sodium chloride (1 mol/L) is five times than that of radioactive effluents, 83% of the adsorption capacity is maintained even after 5 recycles. After the adsorption, uranium(VI) and strontium(II) are eluted by Ca(NO 3 ) 2 and Na 2 CO 3 successively, which makes the aerogel more practical by sequential elution. The prepared U/Sr-IP is an efficient and competitive adsorbent in harsh environment, displaying a promising application in removal of radionuclides from highly saline low level radioactive effluents. This work demonstrates a concept of simultaneously selective adsorption of two or more radionuclides for the first time.

SOLID PHASE EXTRACTANTS BASED ON POROUS POLYMERS IMPREGNATED WITH MULTIDENTATE CHELATING LIGANDS FOR ACTINIDE AND LANTHANIDE REMOVAL

Introduction. Treatment and disposal of radioactive wastes as well as monitoring of radioactive isotope content in environmental objects are actual tasks in the developed world. Lanthanide and transuranium element removal from spent nuclear fuel of nuclear power plants allows decreasing waste amount to be dumped and diminishing the risk of environmental pollution by radionuclides. Problem Statement. Considering extreme radiotoxicity of transuranium elements and tight standards restricting their activity in air and water, there is an urgent need to develop accurate and highly sensitive methods for pollution control. Purpose. Development of solid phase extractants (SPEs) based on porous polymers impregnated with multidentate chelating ligands for lanthanide, uranium and transuranium element removal from aqueous solutions. Materials and Methods. The materials used are porous divinylbenzene polymers of POROLAS brand and styrene-divinylbenzene copolymers from Smoly SE (Kamianske); multidentate chelating ligands of actinides and lanthanides such as N,N,N´,N´-tetra-n-octyl-oxapentane-1,5-diamide (TODGA) and carbamoyl phosphine oxides (CMPO); sorbent from TrisKem (France) based on TRU Resin (Eichrom Industries, Inc.). The research techniques are inductively coupled plasma atomic emission spectrometry, IR spectroscopy, scanning electron spectroscopy, spectrofluorimetry. Results. The solid-phase extractants (SPEs) for actinide and lanthanide removal from aqueous solutions have been synthesized by impregnation of porous polymeric POROLAS matrices and TODGA, CMPO-(PhOct) and CMPO-(Ph2). Sorption kinetics has been studied and capacity values for the different sorbents have been estimated. Extractive columns for uranium and europium concentration have been manufactured. Conclusions. SPEs studied demonstrate a high efficiency in removing uranium and europium from aqueous solutions. Due to their characteristics obtained materials may be used for preconcentration of target ions in radioecologycal monitoring procedures.

Biosorption Capacity for Uranium and Thorium by Some Microalgae Species

THE BIOSORPTION is an effective technique for the removal of uranium and thorium from some types of phosphate rocks of red sea area. In this study Cystoseira osmundacea, Palmaria elegans and Chondrus crispus, were used for the biosorption of uranium (U), and thorium (Th), from phosphates rocks in Egypt in Qusser and Safaga areas west red sea which characterized of shallow-water marine origin and mainly associated with sequences of white hard limestone, white chalk, yellow marls and hard cherts rocks. The obtained results showed that Cystoseira osmundacea, Palmaria elegans and Chondrus crispus have biosorption capacities of (81%, 89% and 90%), for U and (77%, 88% and 91%) for Th, respectively from phosphate of Safaga .and biosorption capacities of (81%, 84% and 89% ), for U and (79%, 81% and 88% ) for Th, respectively from phosphate of Qusser area. it is preferable to use Chondrus crispus on biosorption due to its high sorption capacity than the other two algae.

Amidoximated wooden solar evaporator for high-efficiency nuclear wastewater treatment.

The efficient removal of uranium (VI) (UO22+) is of great significance to the ecological environment. However, there is still a lack of efficient adsorption materials to remove UO22+ in wastewater economically. Because natural basswood has high porosity, natural hydrophilicity, and abundant surface functional groups, wood as a support material has a good application prospect in water treatment. In the present work, the amidoxime functional group (AO) is grafted to the hydroxyl group of the wood fiber (AO-wood). A carbon layer is formed on the surface of the basswood by heating, and some Ag nanoparticles with good optothermal effect are added to the wood tunnel (Ag-C-AO-wood). Ag-C-AO-wood is used for efficient wastewater treatment under light conditions. The adsorption kinetic of Ag-C-AO-wood is 4.6 h under one irradiation, which is 7 times faster than AO-wood. It has approached or even surpassed some traditional carbon materials with stirring. This method is expected to break the traditional stirring method. Ag-C-AO-wood can not only remove uranium up to 82% but also have a good removal efficiency (27%) on iodide ions. More importantly, due to basswood characteristics, it is possible to large-scale preparation and explore its potential application value in wastewater.

Facile preparation and highly efficient sorption of magnetic composite graphene oxide/Fe3O4/GC for uranium removal

In this work, we reported for the first time a novel magnetic composite graphene oxide/Fe3O4/glucose-COOH (GO/Fe3O4/GC) that was facilely prepared from glucose through the hydrothermal carbonization and further combination with graphene oxide (GO). The chemical and structural properties of the samples were investigated. By the batch uranium adsorption experiments, the magnetic composite GO/Fe3O4/GC exhibits an excellent adsorption performance and fast solid–liquid separation for uranium from aqueous solution. GO/Fe3O4/GC (the maximum adsorption capacity (Qm) was 390.70 mg g−1) exhibited excellent adsorption capacity and higher removal rate (> 99%) for U(VI) than those of glucose-COOH (GC) and magnetic GC (MGC). The effect of the coexisting ions, such as Na+, K+, Mg2+, Ca2+, and Al3+, on the U(VI) removal efficiency of GO/Fe3O4/GC was examined. The equilibrium sorption and sorption rate for the as-prepared adsorbents well fit the Langmuir model and pseudo second-order kinetic model, respectively. The thermodynamic parameters (ΔH0 = 11.57 kJ mol−1 and ΔG0 < 0) for GO/Fe3O4/GC indicate that the sorption process of U(VI) was exothermic and spontaneous. Thus, this research provides a facile strategy for the preparation of the magnetic composite with low cost, high efficiency and fast separation for the U(VI) removal from aqueous solution.

Development of Functionalized Activated Carbon for Uranium Removal from Groundwater

Some water wells used for drinking and other human activities in southwest Sinai, Egypt, recorded higher concentrations of uranium than the permissible levels. This paper focuses on uranium removal from groundwater. This target was utilized to develop an efficient and cost-effective graphite adsorbent (Graphite/AC), which was further altered by oxidation (O/AC) and amination (N/O/AC). Studying the controlling factors that affect the removal of uranium by O/AC and N/O/AC samples including, contact time, adsorbent amount, initial uranium concentration, solution pH, operational temperature, and the interfering of metal ions were tested and discussed. Dynamic and thermodynamics studies were achieved to predicate the performance of N/O/AC and O/AC for U(VI) removal from the groundwater samples. The activity of radionuclide (238U-series, 232Th-series and 40 K) and radioactive hazards indices of the groundwater samples were calculated and discussed. The developed materials showed good potential for the treatment of aqueous systems polluted by uranium, with 100 mg/g as maximum capacity. The thermodynamic parameters refer to the spontaneity and endothermic nature of the U(VI) ions adsorption process. A solution of 0.25 M HNO3 was found to be good enough for desorbing the adsorbed U(VI) from the adsorbents (96.8%). The positive effect of the used adsorbents (on the removal or minimizing the radioactive daughters consequently reduction of the hazard indices values) should be noted; this effect will be very helpful and effective with the old-age uranium concentrations.

Synthesis and characterization of polydopamine/hydrous zirconium oxide composite and its efficiency for the removal of uranium (VI) from water

Polydopamine/hydrous zirconium oxide (PDA/ZO) was developed by mixing polydopamine and hydrous zirconium oxide at room temperature. The material was characterized by FTIR, XRD, SEM, TEM and thermal analysis. The effects of solution pH, contact time, mass of adsorbent and initial concentration and their interactions on the adsorption efficiency were examined using response surface methodology via central composite design. Adsorption capacity of PDA/ZO for uranium(VI) was 100.56 mg g−1 under the optimized adsorption process. Equilibrium data were described well by Freundlich isotherm model. The kinetic data were well fitted with the pseudo- second- order kinetic model. The values of ΔG°, ΔH° and ΔS° revealed the endothermic and spontaneous nature of the uptake of U(VI) on PDA/ZO. The results demonstrated that the synthesized material could be useful as an effective sorbent for uptake of U(VI).

An Efficient Uranium Adsorption Magnetic Platform Based on Amidoxime-Functionalized Flower-like Fe3O4@TiO2 Core-Shell Microspheres.

Efficient removal of uranium (U) from aqueous solutions is crucial for ecological safety. Functionalized magnetic nanoparticles provide a promising strategy for radionuclide recovery and separation. However, designing and synthesizing magnetic adsorbents with high sorption capacity and selectivity, accompanied by excellent stability and reusability, remain a challenge. In this work, novel amidoxime-functionalized flower-like magnetic Fe3O4@TiO2 core-shell microspheres are designed and synthesized to efficiently remove U(VI) from aqueous solutions and actual seawater. The magnetic Fe3O4 core facilitates easy separation by an external magnetic field, and flower-like TiO2 nanosheets provide abundant specific surface areas and functionalization sites. The grafted amidoxime (AO) groups could function as a claw for catching uranium. The maximum adsorption capacity on U(VI) of the designed nanospheres reaches 313.6 mg·g-1 at pH 6.0, and the adsorption efficiency is maintained at 97% after 10 cycles. In addition, the excellent selectivity of the magnetic recyclable AO-functioning Fe3O4@TiO2 microspheres endows the potential of uranium extraction from seawater. The designed material provides an effective and applicable diagram for radioactive element elimination and enrichment.

Mesoporous Al2O3 derived from blast furnace slag as a cost-effective adsorbent for U(VI) removal from aqueous solutions

ABSTRACT This work provides an environmental approach to utilise Blast furnace slag (BFS) waste for the processing of aluminium oxide (Al2O3-BFS) as an efficient adsorbent for uranium removal from wastewater. The composition of BFS is less variable and this makes it a low cost and abundant raw material for preparing a solid base Al2O3-BFS. The silica material was initially removed and then the aluminium content was separated by precipitation with sodium hydroxide depending on pH control (pH 5.5). The raw BFS and Al2O3-BFS were characterised via various methods, such as; XRD, Zeta potential, N2 adsorption-desorption isotherm, DLS, and FT-IR. BFS exhibited the typical type III isotherm with an H3-type hysteresis loop. The curve of Al2O3-BFS exhibited the typical IV isotherms with a H2-type hysteresis loop. The BET surface and average pore sizes of the Al2O3-BFS are 137.7 m2 g-1 and 3.9 nm, respectively. Experiments and discussions were performed in terms of balance, isothermal, kinetic, and applicability. The finding provides proof of the ability of synthesised Al2O3-BFS to remove U(VI) ions from wastewater as an efficient adsorbent with a maximum sorption capacity value of 62 mg/g. The pseudo second, Langmuir and Dubinin-Radushkevich models were found suitable to explain the rate kinetics and isotherm of uranium removal. Uranium sorption on Al2O3-BFS may occur via inner-sphere complex and ion-exchange between uranium ions and HO-Al2O3-BFS groups. The higher elution efficiency of Al2O3-BFS indicates a promising adsorbent in the technology of U(VI) removal.

Enhanced removal of uranium (VI) from leach liquors by aniline - polyaniline with Chinese D263B resin

ABSTRACT Aniline and polyaniline was successfully impregnated with Chinese D263B resin and polymerisation prepared via using polyvinyl alcohol as a surfactant and benzoyl peroxide to form impregnated D263B/aniline and D263B/polyaniline were used for enhancing the removal of U(VI) from Abu El Toyour leach liquor. The impregnated D263B/polyaniline was characterised by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). Experimental measurements have been optimised by batch extraction technique such as pH, contact time, initial U(VI) concentration, resin dosage, temperature and eluting agents. It was found that the maximum uptake capacity of Chinese D263B resin is 40 mg/g at room temperature, Chinese D263B resin with aniline is 86.95 mg/g and Chinese D263B resin with polyaniline is 121.95 mg/g. The resulted equilibrium data fitted well with Langmuir isotherm model. From kinetic parameters, it was found that U(VI) adsorption followed the pseudo-second order kinetic model. The thermodynamic parameters ΔH, ΔS and ΔG were also evaluated indicating exothermic, randomness and non-spontaneous adsorption process. U(VI) can be eluted approximately 99% from the loaded D263B/polyaniline using 1 M (1:1) NaCl/H2SO4. Finally, the optimised factors have been applied for enhanced U(VI) removal from Abu El Toyour leach liquor.

Application of gamma-ray spectroscopy and IR-spectroscopy methods for the purposes of ore geology in the Timan-Pechora Oil and Gas Province (the case of Ukhta Region)

Two express methods are presented in this paper. The first method is a high-resolution gamma-spectroscopic method based on a germanium detector, the second method is an IR-spectroscopic method. The applied complex of methods allows to determine the sources of uranium and thorium, identify the rhythms of uranium accumulation associated with regional events; identify areas with a high content of uranium due to the influence of local sources (faults, hydrothermal, etc.); determine the amount of authigenous uranium in the composition of total uranium; determine thermal maturity of organic matter in shales without their preliminary demineralization. To identify levels of increased uranium intensity in the high-carbon strata, a set of indicators has been proposed, which includes both applied indicators in practice of geological work and new indicators. New indicators have been tested on the collection of shale reference samples. For them, values ​​were established that characterize the processes of uranium accumulation and uranium removal. On the example of Ukhta Region according to the proposed indicators, the sections from the Vendian-Riphean to Domanic inclusive were interpreted. The performed work showed the possibility of comparing the calculated gamma-spectroscopic data with the data of other methods. This opens up a broader perspective for the use of express non-destructive gamma-spectroscopic method for detecting levels with a high content of uranium in the shale rocks, to which ore-bearing concentrations of a number of metals are also confined.

Biochar derived from Salvadora persica branches biomass as low-cost adsorbent for removal of uranium(VI) and thorium(IV) from water

In recent years, biochar based adsorbents have been given more attention for organic and inorganic pollutants removal. Therefore, in this study, a new low-cost biochar adsorbent derived from Salvadora persica branches (BSP) was prepared, characterized and investigated for removal of U(VI) and Th(IV) radioactive elements from water. The effects of batch adsorption conditions were studied. The maximum removal efficiencies are around 99% for each of U(VI) and Th(IV), with adsorption capacities 85.71 mg g−1 and 84.97 mg g−1 respectively. It has been found the adsorption process of U(VI) and Th(IV) is spontaneous, exothermic and follows pseudo-second-order kinetics.

Film-like chitin/polyethylenimine biosorbent for highly efficient removal of uranyl-carbonate compounds from water

Uranium contamination in groundwater has been increasingly reported, while biosorbents for the decontamination attracts growing attention because of their distinct advantages of abundant raw materials and eco-friendliness. Herein, a film-like chitin/polyethylenimine biosorbent (CH-PEI) was prepared and employed in the removal of uranyl-carbonate compounds from water. Fourier transform infrared spectra, element analysis, scanning electron microscopy/energy dispersive X-ray spectroscopy, N2 adsorption-desorption isotherms and X-ray photoelectron spectroscopy were used to characterize the biosorbent. Besides, thermodynamic calculation and various batch experiments were conducted to investigate the adsorption performances of CH-PEI for uranyl removal from carbonate solution. The results showed that the biosorbent possessed a unique hierarchically porous structure and a high nitrogen content. The batch experiments exhibited that it obtained the maximum adsorption capacity at pH = 6. Notably, CH-PEI could reach sorption equilibrium within 4 h at the initial concentration of 50 mg/L. The maximum adsorption capacity were 247.04 mg/g and 1023.74 mg/g at the initial concentrations of 50 mg/L and 300 mg/L. The kinetics and isotherm data were well fitted by pseudo-second-order and Langmuir models. It could remove 98.9% of uranium in the simulated groundwater. The biosorbent showed fast regeneration, good structural stability and reusability in 5 cycles. Furthermore, the adsorption mechanism was confirmed to be anion exchange and electrostatic attraction between nitrogen species and uranyl-carbonate complexes through FT-IR and XPS analysis. Considering its low costs, high efficiency and easy collection, CH-PEI would be a promising biosorbent for uranium removal from groundwater. This study provides a potential technique for uranium removal using chitin-based adsorbents.

Structural properties and adsorption of uranyl ions on the nanocomposite hydroxyapatite/white clay

Uranium is more and more extensively applied as a source of energy and can be potentially used for nuclear weapon production. Owing to that fact, the problem of uranium expansion in the environment is the object of research and draw attention many scientists. One of the most effective methods of uranium removal from the wastewater (where uranium is present in a low concentration and occurs mainly in the form of uranyl ion, UO22+) is the adsorbent usage. It is important to discover an adsorbent which will be effective, widely available and cheap. The paper discusses properties and the ability of U (VI) adsorption on a clay and nanocomposite clay/Hap (hydroxyapatite) obtained by wet method. The adsorbents were characterized by the mentioned below tests: XRD, XRF, the porosity (nitrogen adsorption–desorption method), zeta potential, surface charge density and sorption of U (VI). It was shown that nanocrystalline composites Hap/white clay can be appropriate adsorbent for removal of uranyl ions. The adsorption depends on the temperature and pH of the solution.

Preparation of amidoxime modified porous organic polymer flowers for selective uranium recovery from seawater

• POP-F structure was developed by free radical polymerization method. • Amidoxime modified POP-F material showed selective U(VI) adsorption. • POP-AOF shows fast and efficient U(VI) adsorption from natural seawater. • The adsorption capacity of POP-F and POP-AOF are 149.1 ± 0.2 and 500.1 ± 0.5 mg/g. Simple and facile technologies for efficient uranium(VI) removal from seawater is highly interesting for energy and environmental sustainability. By take advantage of the polymerization of acrylonitrile, amidoxime modified porous organic polymer flower-like structure (POP-AOF) adsorbent is synthesized. POP-AOF is of great interest for energy and environmental applications, since their unique structures not only provides high functionality but also accelerates high selectivity via secondary building units. The unique structure of POP-AOF showed multistep kinetics controlled by chemisorption and intraparticle diffusion model. In practical applications, POP-AOF performed as an efficient adsorbent for selective uranium(VI) removal from simulated solution and seawater are investigated. Time-dependent measurement of uranium(VI) adsorption capacity and half-saturation time of seawater exposed POP-AOF is analyzed using a one-site ligand saturation model. The coordination was analyzed by spectroscopic analysis and amidoxime groups of POP-AOF act as a bidentate ligand to trap uranium(VI) from seawater. This work addresses the potential of acrylonitrile and amidoxime chemistry for the development of new adsorbents for efficient uranium(VI) removal from seawater.

Pomegranate peel waste biomass modified with H3PO4 as a promising sorbent for uranium(VI) removal

Modified pomegranate peel was utilized as a sorbent for the biosorption of uranium(VI) from the aqueous solution. The biosorbent was characterized by infrared spectroscopy with Fourier transformation, energy dispersive X-ray fluorescence spectrometry, particle size analyser and determination of pHpzc. “Under optimized experimental conditions” the maximum adsorption capacity was 93.40 mg L−1. The equilibrium data fitted well to the Freundlich’s and Temkin’s isotherm model. Calculated data from applied kinetics model showed best agreement to the pseudo-second order model. Thermodynamic study showed the adsorption process is endothermic and nonspontaneous.

Uranium contamination removal from water by an orchid (Vanda tessellata) based biosorbent

The study reports biosorptive removal of uranium(VI) water contamination by a wild epiphytic orchid plant: Vanda tessellata. This orchid plant was chosen based on abundant availability and adsorption efficacy. In batch mode operation the maximum uranium(VI) adsorption capacity was found as 416 μg g−1 of dry biomass. The optimum pH for adsorption was neutral (7), and the equilibrium time was 15 min at 30 ± 5 °C temperature. The adsorbent properties were characterized by SEM, EDS, and FTIR techniques. The effects of various variables like pH, initial ion concentration, biosorbent dose, contact time, and temperature on the adsorption process were studied. The Langmuir isotherm showed better agreement (R2 = 0.987) to describe the adsorption process, and the adsorption process followed pseudo-second-order kinetics. The thermodynamic study showed the endothermic, and spontaneous nature of adsorption in a feasible manner. The adsorbent can be used for developing a remedial method for uranium contamination in the water.

Removal of uranium(VI) from simulated wastewater by a novel porous membrane based on crosslinked chitosan, UiO-66-NH2 and polyvinyl alcohol

The development of highly efficient adsorbent presents an enticing prospect for U(VI)-containing radioactive wastewater treatment. In this work, a novel porous cCS/PVA/UiO-66-NH2 membrane absorbent comprising of crosslinked chitosan (cCS), polyvinyl alcohol (PVA) and UiO-66-NH2 is designed and prepared. The adsorption capacity of porous cCS/PVA/UiO-66-NH2 membrane achieves 316.50 mg g−1 under an optimal condition. Furthermore, the porous cCS/PVA/UiO-66-NH2 membrane exhibits a high selectivity for U(VI) adsorption in simulated radioactive wastewater treatment. The possible mechanism of U(VI) adsorption onto porous cCS/PVA/UiO-66-NH2 membrane mainly includes surface complexation and cation exchange processes. In addition, the porous cCS/PVA/UiO-66-NH2 membrane also exhibits excellent cycling adsorption-‍desorption performance. All these results demonstrate that the porous cCS/PVA/UiO-‍66-NH2 membrane is a promising candidate for application in U(VI) removal from radioactive wastewater.