Bioassembly of fungal hypha/graphene oxide aerogel as high performance adsorbents for U(VI) removal

Li, Yang; Li, Luyan; Zhu, Wenkun; Duan, Tao; Yao, Weitang; Zheng, Kui; Dai, Lichun

doi:10.1016/j.cej.2018.04.140

Cited by 98 publications

(35 citation statements)

References 44 publications

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“…The ocean contains about 4.5 billion tons of uranium, which is nearly 1000 times that of terrestrial uranium reserves and could supply nuclear energy for 13,000 years [10,11,12]. Among various approaches applied to extract uranium from seawater, adsorption is a widely studied process in terms of its high efficiency [13], ease of handling [14] and little pollution to the environment [15,16]. On account of the high chelating affinity of amidoxime groups towards uranyl ions and favorable acid-base resistance, amidoxime-based adsorbents (particularly in the form of polymers), were regarded as one of the most promising candidates for uranium extraction [17,18,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Symbiotic Aerogel Fibers Made via In-Situ Gelation of Aramid Nanofibers with Polyamidoxime for Uranium Extraction

Wang

et al. 2019

Molecules

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The uranium reserve in seawater is enormous, but its concentration is extremely low and plenty of interfering ions exist; therefore, it is a great challenge to extract uranium from seawater with high efficiency and high selectivity. In this work, a symbiotic aerogel fiber (i.e., PAO@ANF) based on polyamidoxime (PAO) and aramid nanofiber (ANF) is designed and fabricated via in-situ gelation of ANF with PAO in dimethyl sulfoxide and subsequent freeze-drying of the corresponding fibrous gel precursor. The resulting flexible porous aerogel fiber possesses high specific surface area (up to 165 m2·g−1), excellent hydrophilicity and high tensile strength (up to 4.56 MPa) as determined by BET, contact angle, and stress-strain measurements. The batch adsorption experiments indicate that the PAO@ANF aerogel fibers possess a maximal adsorption capacity of uranium up to 262.5 mg·g−1, and the absorption process is better fitted by the pseudo-second-order kinetics model and Langmuir isotherm model, indicating an adsorption mechanism of the monolayer chemical adsorption. Moreover, the PAO@ANF aerogel fibers exhibit selective adsorption to uranium in the presence of coexisting ions, and they could well maintain good adsorption ability and integrated porous architecture after five cycles of adsorption–desorption process. It would be expected that the symbiotic aerogel fiber could be produced on a large scale and would find promising application in uranium ion extraction from seawater.

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Section: Introductionmentioning

confidence: 99%

Symbiotic Aerogel Fibers Made via In-Situ Gelation of Aramid Nanofibers with Polyamidoxime for Uranium Extraction

Wang

et al. 2019

Molecules

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“…[111] Li et al found that common anions (Cl -, NO 3 showing that FH/GOA-800 had good selectivity for U(VI). [45] Dai et al applied polyamidoxime/polydopamine-decorated GO (GO/PDA/PAO) for U(VI) adsorption from actual mine radioactive wastewater. [73] The removal rate and Kd of the metal ions in the actual wastewater are listed in Fig.…”

Section: 3mentioning

confidence: 99%

“…For example, Li et al assembled fungal hypha/GO aerogel as high-performance adsorbents for U(VI) removal. [45] This fungal hypha/GO aerogel exhibited an excellent capability on U(VI) removal due to its large specific surface area (894 m 2 /g) and abundant functional groups. Yang et al found that GO-cellulose (GOC) composites were promising absorbents for uranium wastewater treatment.…”

Section: Introductionmentioning

confidence: 98%

Graphene Oxide-based Nanomaterials for Uranium Adsorptive Uptake

Liu¹,

Mao²

2021

ES Mater. Manuf.

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The growth of nuclear power generation and the necessity to acquire uranium reserves for energy security and pollution regulation for environmental protection put much emphasis on the removal and recovery of uranium from aqueous solutions. Adsorption has been proved to be a promising method for this purpose method because of its high adsorption efficiency, easy operation, low cost, reusability and availability of massive adsorbents. Among a wide variety of adsorbents, graphene oxide (GO) has demonstrated excellent adsorption potential for uranium uptake and recovery due to its unique 2D structure, high specific surface area and abundant oxygen-containing functional groups. Regarding the functional groups, it can make GO with high dispersion and hydrophilicity and participate in the complexation of uranium, leading to high adsorption efficiency for uranium. In this review, the research status and progress of GO-based nanomaterials for uranium adsorption are summarized. Their adsorption capacities, influencing factors, kinetics, isotherms and thermodynamics are compared and discussed. The microscopic mechanisms of uranium adsorption onto these GO-based nanomaterials are elaborated at molecular level by spectral analysis, surface complexation models, and theoretical calculations. Meanwhile, the challenges and research trends in the study of uranium adsorption by GO-based nanomaterials are pointed out. We believe that our focused review provides not only a summarizing reference on the current status of uranium removal and recovery by GObased nanomaterials, but also future directions for related follow-up research and practical applications.

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“…Several synthetic techniques, including self-assembly [ 33 ], bioassembly [ 34 ], unidirectional freezing [ 35 ], and ice crystal templating [ 32 ], have been developed to prepare GO aerogel for wastewater treatment. However, these GO aerogels with 3D architectures often suffer from poor mechanical strength, and are prone to collapses or even fragmentation upon immersion in water, which not only hinders the effective reutilization of the aerogel, but causes secondary pollution in water environments.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Ultra-Light Coal-Based Graphene Oxide Aerogel for Efficient Removal of Dyes from Aqueous Solutions

Xing

Zheng

et al. 2018

Nanomaterials

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A novel carboxymethyl cellulose (CMC)-supported graphene oxide aerogel (CGOA) was fabricated from a cost-effective and abundant bituminous coal by a mild hydrothermal process and freeze-drying treatment. Such an aerogel has cross-linked graphene oxide layers supported by CMC, and therefore, displays high mechanical strength while having ultra-low density (8.257 mg·cm−3). The CGOA has a 3D interconnected porous structure, beneficial graphene framework defects and abundant oxygen-containing functional groups, which offer favorable diffusion channels and effective adsorption sites for the transport and adsorption of dye molecules. The adsorption performance of rhodamine B by an optimized CGOA shows a maximum monolayer adsorption capacity of 312.50 mg·g−1, as determined by Langmuir isotherm parameters. This CGOA exhibited a better adsorption efficiency (99.99%) in alkaline solution, and satisfactory stability (90.60%) after three cycles. In addition, adsorption experiments on various dyes have revealed that CGOA have better adsorption capacities for cationic dyes than anionic dyes.

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Bioassembly of fungal hypha/graphene oxide aerogel as high performance adsorbents for U(VI) removal

Cited by 98 publications

References 44 publications

Symbiotic Aerogel Fibers Made via In-Situ Gelation of Aramid Nanofibers with Polyamidoxime for Uranium Extraction

Symbiotic Aerogel Fibers Made via In-Situ Gelation of Aramid Nanofibers with Polyamidoxime for Uranium Extraction

Graphene Oxide-based Nanomaterials for Uranium Adsorptive Uptake

Hydrothermal Synthesis of Ultra-Light Coal-Based Graphene Oxide Aerogel for Efficient Removal of Dyes from Aqueous Solutions

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