Lacunary polyoxometalate @ ZIF for ultradeep Pb(II) adsorption

Tang, Duanlian; Xiong, Zhuo; Lu, Peixiang; Wang, Siqi; Chen, Xiaoyan; Lou, Xiaoyu; Zheng, Mingzhu; Chen, Song; Ye, Changshen; Chen, Jie; Qiu, Ting

doi:10.1016/j.ces.2022.118003

Cited by 18 publications

(7 citation statements)

References 63 publications

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“…The rapid and enhanced adsorption of BPA over the p(HIPE)/NClay@S composite could be related to the more accessible diffusion pathway because of incorporation of nanoclay, the presence of abundant active surface sites, and enhanced hydrophilicity after sulfonation, which leads to a stronger driving force for the transfer of phenol molecules from liquid phase to the adsorbent surface. As shown in Table 5, the comparison of the kinetic parameters verified that the pseudo‐second‐order model fitted better to the experimental data with higher R 2 values, reflecting that the chemisorption mechanism was involved in the removal process (Tang et al, 2022). In addition, the experimental adsorption capacities were in respectable agreement with the calculated values for the second‐order model.…”

Section: Resultsmentioning

confidence: 77%

Sulfonated polyHIPE/nanoclay composites with hierarchically porous structure for efficient removal of endocrine‐disrupting hormone from aqueous solution

Şimşek

Mert

Sözbir

et al. 2023

Water Environment Research

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The objective of this study is the synthesis of macroporous polystyrene‐based polyHIPE/nanoclay (p[HIPE]/NClay) monoliths and post‐functionalization of the monoliths through sulfonation to improve the structural and textural properties as well as adsorption performances toward bisphenol A (BPA) as an endocrine‐disrupting chemical. The adsorption tests were conducted with raw p(HIPE), nanoclay, p(HIPE)/NClay, and sulfonated samples in order to obtain insights in the adsorption mechanism. The synergy between clay embedding and sulfonation resulted in higher BPA removal performance of p(HIPE)/NClay@S sample (96% removal) when compared with the raw polyHIPE (52% removal). The adsorption efficiency was mainly attributed to the functionality, followed by porosity and hydrophilicity of the as‐synthesized materials. Considering the roles of hydrophobic, hydrogen‐bonding, and π–π stacking interactions, the adsorption mechanism was discussed by using X‐ray photoelectron spectroscopy (XPS) analysis. Moreover, the experimental parameters including solution pH, co‐existing anions, ionic strength, and temperature were investigated in detail. The adsorption data were fitted to isotherm and kinetic models. The composite adsorbents also displayed excellent regeneration and stability until the fifth cycle. This research provides fresh insights into the effective adsorptive removal of endocrine‐disrupting hormones by sulfonated porous nanoclay‐polymer monoliths. Practitioner Points Sulfonated p (HIPE)/nanoclay monoliths were prepared. Bisphenol A adsorption mechanism was explored in detail. Nanoclay incorporation and sulfonation greatly enhanced the removal efficiency. The composite could be used until the fifth cycle.

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Section: Resultsmentioning

confidence: 77%

Sulfonated polyHIPE/nanoclay composites with hierarchically porous structure for efficient removal of endocrine‐disrupting hormone from aqueous solution

Şimşek

Mert

Sözbir

et al. 2023

Water Environment Research

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“…Different types of adsorbents can be designed and used in water treatment technologies, such as nanomaterials, polymers, and green materials. − It is extremely important to develop economical and environmentally friendly wastewater treatment methods and technologies. , However, most of the stated methods are relatively inefficient, produce toxic byproducts, expensive, slow processing, and not used on a large scale. Among the aforementioned methods, adsorption is still one of the most widely used techniques because of its advantages of high efficiency, low cost, and environmental friendliness …”

Section: Introductionmentioning

confidence: 99%

Fast Removal of Tetracycline from Aqueous Solution by Aluminosilicate Zeolite Nanoparticles with High Adsorption Capacity

2023

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Aluminosilicate zeolite nanoparticles were synthesized in a water-in-oil solvent and applied as an adsorbent for tetracycline (TC) removal from aqueous solutions. The large specific surface area at 495.8 m 2 g −1 confirms that the zeolite nanoparticles have mesopores. The zeolite nanoparticles show an excellent removal efficiency for TC, achieving over 97% in the pH range of 4.70−7.17. A fast adsorption kinetics was observed, reaching equilibrium in only 20 min following a pseudo-second-order kinetic model. The adsorption isotherm was found to follow the Langmuir model, with a maximum adsorption capacity of TC of 454.55 mg g −1 at pH 6.7 with no salt added. After 6 cycles of reuse, the removal efficiency of TC remained high at 90.3%. It was understood that the adsorption process is spontaneous and exothermic, with an activation energy of 37.94 kJ mol −1 . The high observed adsorption affinity is attributed to hydrogen bonding between TC and the hydroxyl groups on the zeolite nanoparticles and the formation of outer-sphere surface complexes. This study shows a new way to synthesize aluminosilicate zeolite nanoparticles that are an efficient and recyclable adsorbent for effective removal of TC from contaminated water.

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“…Adsorption processes are attractive as they are easy to implement (typically with a low initial investment cost) and operate and they are capable of removing a variety of contaminants. − Many advanced adsorbents have been developed to remove many types of contaminants, such as porous polymers (CMPs), , metal–organic frameworks (MOFs), or hyper-cross-linked resins . Lou et al synthesized a microporous polyaniline based adsorbent for the removal of mercury(II), which showed a theoretical adsorption capacity of 975 mg/g .…”

Section: Introductionmentioning

confidence: 99%

“…Lou et al synthesized a microporous polyaniline based adsorbent for the removal of mercury(II), which showed a theoretical adsorption capacity of 975 mg/g . In another study, Tang et al developed lacunary polyoxometalate coated zeolite imidazolate frameworks (ZIFs) capable of adsorbing Pb(II) at a capacity of 764 mg/g . Also, Chen et al produced hyper cross-linked resins of polystyrene with toluene, aniline, and phenol based ligands, which demonstrated adsorption capacities for 2,4-dinitrotoluene as high as 657.9 mg/g .…”

Section: Introductionmentioning

confidence: 99%

“…15 In another study, Tang et al developed lacunary polyoxometalate coated zeolite imidazolate frameworks (ZIFs) capable of adsorbing Pb(II) at a capacity of 764 mg/g. 17 Also, Chen et al produced hyper cross-linked resins of polystyrene with toluene, aniline, and phenol based ligands, which demonstrated adsorption capacities for 2,4dinitrotoluene as high as 657.9 mg/g. 18 In addition, Saleh et al grafted acrylic acrylamide onto silica nanoparticles for removing MB from water, which showed a maximum adsorption capacity of 375.9 mg/g.…”

Section: ■ Introductionmentioning

confidence: 99%

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In-Situ Production of Cellulose Nanocrystal-Alginate Hydrogel Beads and Dye Removal in Fixed Bed Adsorption Column

Grishkewich,

Mohammed,

Toffolo

et al. 2023

ACS EST Water

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In this study, adsorption modeling of a model organic dye, methylene blue (MB), onto cellulose nanocrystal-alginate (CNC-ALG) hydrogel beads in a fixed bed column until full breakthrough was performed. A method for the in-situ production and loading of CNC-ALG hydrogel beads in a fixed bed column adsorption process was proposed for the first time. Fixed bed column adsorption experiments using MB and 0.5 wt % ALG and 2 wt % CNC beads were conducted using various initial dye concentrations, influent flow rates and adsorbent mass. The results were evaluated using a mathematical model with axial dispersion, film and pore diffusion to predict the fluid and particle phase continuity, and good agreement with the experimental data was observed. Experiments conducted using the spent hydrogel beads in a fixed bed column suggested that these adsorbents could be regenerated to 81% of its original adsorption capacity upon elution with 1 M hydrochloric acid:ethanol (1:1 v:v), and a subsequent adsorption cycle indicated that these adsorbents could achieve 96% of the renewed adsorption capacity. Furthermore, both batch and fixed bed column adsorption experiments displayed the maximum adsorption capacities of 401.8 and 410.5 mg MB/g adsorbent, respectively, and these similar values signify the reproducibility of the adsorption capacity of the adsorbents when operated under batch and continuous modes.

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Lacunary polyoxometalate @ ZIF for ultradeep Pb(II) adsorption

Cited by 18 publications

References 63 publications

Sulfonated polyHIPE/nanoclay composites with hierarchically porous structure for efficient removal of endocrine‐disrupting hormone from aqueous solution

Sulfonated polyHIPE/nanoclay composites with hierarchically porous structure for efficient removal of endocrine‐disrupting hormone from aqueous solution

Fast Removal of Tetracycline from Aqueous Solution by Aluminosilicate Zeolite Nanoparticles with High Adsorption Capacity

In-Situ Production of Cellulose Nanocrystal-Alginate Hydrogel Beads and Dye Removal in Fixed Bed Adsorption Column

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