Porous lignin based poly (acrylic acid)/organo-montmorillonite nanocomposites: Swelling behaviors and rapid removal of Pb (II) ions

Ma, Yanli; Lv, Ling; Guo, Yuan‐Ru; Fu, Yujie; Shao, Qian; Wu, Tingting; Guo, Sijie; Sun, Kai; Guo, Xingkui; Wujcik, Evan K.; Guo, Zhanhu

doi:10.1016/j.polymer.2017.09.009

Cited by 308 publications

(116 citation statements)

References 65 publications

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“…The fiber mats and braids are tested in three different conditions: natural dry state, wet state saturated with seawater and wet state after base conditioning with 10 × 10 −3 m NaOH solution at 60 °C for 30 min, respectively. 13.02 ± 1.87 MPa for dry mat, dry braid, wet mat, wet braid, base conditioned wet mat and base conditioned wet braid, respectively. 13.02 ± 1.87 MPa for dry mat, dry braid, wet mat, wet braid, base conditioned wet mat and base conditioned wet braid, respectively.…”

Section: Characterization Of Pido Nfsmentioning

confidence: 97%

“…[40] An alkaline conditioning of amidoxime-based adsorbent prior to its submersion in seawater is an established step to improve the adsorbent's capacity. 13 C CP/MAS NMR spectroscopy is performed to provide more definite information on this important point. The alkaline conditioning significantly enhances the uranium loading capacity ( Figure S3a,b, Supporting Information) though it is still not fully understood in terms of chemical structure changes.…”

Section: Characterization Of Pido Nfsmentioning

confidence: 99%

“…[3] The oceans hold ≈4.5 billion tons of uranium, [4] making them a potential huge resource to support nuclear power production for hundreds of years. [10][11][12][13][14][15][16] Among these technologies, the adsorption approach, particularly by using fiber-based adsorbents, is recognized as the most feasible process in terms of practicality, processability, cost, and environmental concerns. In the last decades, researchers worldwide have tried various methods to recover uranium from seawater and aqueous solution, such as coprecipitation, [6] ion-exchange, [7] adsorption via porous organic polymers, [8,9] and organic-inorganic hybrid adsorbents.…”

mentioning

confidence: 99%

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Significantly Enhanced Uranium Extraction from Seawater with Mass Produced Fully Amidoximated Nanofiber Adsorbent

Wang

Song

Wen

et al. 2018

Advanced Energy Materials

258

166

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electricity on a large scale with ultralow greenhouse gases emission. [2] Uranium is the most critical ingredient for the production of nuclear power. In order for nuclear power to be a sustainable energy generation in the future, economically viable sources of uranium beyond terrestrial ores must be developed. [3] The oceans hold ≈4.5 billion tons of uranium, [4] making them a potential huge resource to support nuclear power production for hundreds of years. [5] All that is required is the ability to capture this element from seawater in cost-and energy-efficient ways. In the last decades, researchers worldwide have tried various methods to recover uranium from seawater and aqueous solution, such as coprecipitation, [6] ion-exchange, [7] adsorption via porous organic polymers, [8,9] and organic-inorganic hybrid adsorbents. [10][11][12][13][14][15][16] Among these technologies, the adsorption approach, particularly by using fiber-based adsorbents, is recognized as the most feasible process in terms of practicality, processability, cost, and environmental concerns. [3,17] In the 1990s, Japan Atomic Energy Agency (JAEA) research teams had successfully captured over 1083 g of uranium directly from ocean by using nonwoven fabric adsorbent, firmly establishing the practicality of uranium recovery from the oceans in appreciable quantities. [3,18] Uranium extraction from seawater via fiber adsorption has recentlyThe oceans contain hundreds of times more uranium than terrestrial ores. Fiber-based adsorption is considered to be the most promising method to realize the industrialization of uranium extraction from seawater. In this work, a pre-amidoximation with a blow spinning strategy is developed for mass production of poly(imide dioxime) nanofiber (PIDO NF) adsorbents with many chelating sites, excellent hydrophilicity, 3D porous architecture, and good mechanical properties. The structural evidences from 13 C NMR spectra confirm that the main functional group responsible for the uranyl binding is not "amidoxime" but cyclic "imidedioxime." The uranium adsorption capacity of the PIDO NF adsorbent reaches 951 mg-U per g-Ads in uranium (8 ppm) spiked natural seawater. An average adsorption capacity of 8.7 mg-U per g-Ads is obtained after 56 d of exposure in natural seawater via a flowthrough column system. Moreover, up to 98.5% of the adsorbed uranium can be rapidly eluted out and the adsorbent can be regenerated and reused for over eight cycles of adsorption-desorption. This new blow spun PIDO nanofabric shows great potential as a new generation adsorbent for uranium extraction from seawater.

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Section: Characterization Of Pido Nfsmentioning

confidence: 97%

Section: Characterization Of Pido Nfsmentioning

confidence: 99%

mentioning

confidence: 99%

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Significantly Enhanced Uranium Extraction from Seawater with Mass Produced Fully Amidoximated Nanofiber Adsorbent

Wang

Song

Wen

et al. 2018

Advanced Energy Materials

258

166

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“…Sevilla and Fuertes successfully prepared sustainable porous carbons by using sawdust,s tarch, and cellulose to capture CO 2 . [122] In spite of differences in the HC precursor,a ll sam- Reviews ples show nearly the same morphology( see Figure 5e); thus revealing that the activatedc arbonsi nherit no previous structures from the parentH C. The TEM image in Figure 5f proves that the porosity of activated carbon is madeu po fr andomly oriented uniform micropores. Then, the HC materials were chemically activated by using KOH at an optimal weightr atio (KOH/HC = 2o r4 ).…”

Section: Wood and Residues Of Wood Processingmentioning

confidence: 81%

Solid‐Waste‐Derived Carbon Dioxide‐Capturing Materials

et al. 2019

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Solid sorbents are considered to be promising materials for carbon dioxide capture. In recent years, many studies have focused on the use of solid waste as carbon dioxide sorbents. The use of waste resources as carbon dioxide sorbents not only leads to the development of relatively low‐cost materials, but also eliminates waste simultaneously. Different types of waste materials from biomass, industrial waste, household waste, and so forth were used as carbon dioxide sorbents with sufficient carbon dioxide capture capacities. Herein, progress on the development of carbon dioxide sorbents produced from waste materials is reviewed and covers key factors, such as the type of waste, preparation method, further modification method, carbon dioxide sorption performance, and kinetics studies. In addition, a new research direction for further study is proposed. It is hoped that this critical review will not merely sum up the major research directions in this field, but also provide significant suggestions for future work.

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“…The Langmuir (Eq. 2) [38,39] and Freundlich (Eq. 3) [39,40] models were applied to fit the adsorption isotherms:…”

Section: Discussionmentioning

confidence: 99%

Separation-free Al-Mg/graphene oxide composites for enhancement of urban stormwater runoff quality

Ahmadi

Yang

Jones

et al. 2018

Adv Compos Hybrid Mater

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Separation-free Al-Mg/graphene oxide (Al-Mg/GO) composites were synthesized by facile one-pot hydrothermal treatment and examined for adsorptive removal of representative contaminants (phosphate, copper (II), and Diclofenac (DCF)) in urban stormwater runoff. The Al-Mg/GO composites exhibited good adsorption capacity for all three contaminants. The adsorption isotherm and kinetics are well described by Freundlich model and pseudo-second-order model, respectively. Further, adsorption of phosphate and DCF favored acidic conditions while an opposite trend was observed for copper (II), which can be ascribed to the change of surface charge of the composites at different pH. The presence of different ions commonly present in environmental matrices (humic acid, bicarbonate, and sulfate) exhibited different effects on the contaminants' removal. Bicarbonate inhibited phosphate and DCF adsorption but promoted copper (II) removal. Copper (II) adsorption was also increased through chemical complexation and electrostatic attraction as a result of humic acid/sulfate adsorption on the adsorbents. The adsorption mechanisms include electrostatic interaction for all three contaminants, Lewis acid-base interactions and surface complexation for phosphate, π-π interactions for DCF, and cation-π interactions for copper (II). More than 75% adsorption capacities were maintained after 4 cycles of adsorption/desorption/regeneration, indicating good reusability. The Al-Mg/GO composites show great potential as a multifunctional adsorptive material for urban stormwater management.

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Porous lignin based poly (acrylic acid)/organo-montmorillonite nanocomposites: Swelling behaviors and rapid removal of Pb (II) ions

Cited by 308 publications

References 65 publications

Significantly Enhanced Uranium Extraction from Seawater with Mass Produced Fully Amidoximated Nanofiber Adsorbent

Significantly Enhanced Uranium Extraction from Seawater with Mass Produced Fully Amidoximated Nanofiber Adsorbent

Solid‐Waste‐Derived Carbon Dioxide‐Capturing Materials

Separation-free Al-Mg/graphene oxide composites for enhancement of urban stormwater runoff quality

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