Investigation into Cationic Surfactants and Polyelectrolyte-Coated β-Zeolites for Rapid and High-Capacity Adsorption of Short- and Long-Chain PFAS

Hossain, Md. Shahadat; Arm, Stuart T.; Ramarao, Bandaru V.; VanLeuven, Charlene C.; Wriedt, Mario; Kiemle, David J.; Satchwell, Michael F.; Kumar, Deepak

doi:10.1021/acs.iecr.3c00468

Cited by 7 publications

(4 citation statements)

References 56 publications

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“…The BEA and FAU 12-ring zeolites had the best removal of long-chain zeolite compounds of all frameworks tested, while only MFI had comparable removal for short-chain compounds (Figure ). This is consistent with the existing literature, where these compounds are the most-studied for PFAS adsorption. ,− ,− The BEA zeolite framework had the overall highest adsorption, which is consistent with the literature. , BEA zeolites also had the most consistently high removal levels across different PFAS structures (Figure ). However, the exact adsorption mechanism is not yet determined.…”

Section: Resultssupporting

confidence: 89%

“…Zeolites are crystalline aluminosilicates, and are typically utilized in gas-phase applications, but can also operate successfully in aqueous systems (e.g., commercial laundry detergents) . Previous studies have shown the effectiveness of zeolites for removing PFAS in aqueous solution, ,− and surface modifications can further enhance electrostatic and hydrophobic interaction . Compared to activated carbon and mesoporous silicas, zeolites have the benefit of a more targeted removal of specific compounds through molecular sieving effects; however, a limited number of experimental studies focused on zeolites have been reported.…”

Section: Introductionmentioning

confidence: 99%

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Zeolites for Sorption of PFAS from Water

Ponge,

Sheehan,

Corbin

et al. 2024

Ind. Eng. Chem. Res.

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Per-and polyfluoroalkyl substances (PFAS) are persistent organic pollutants that are widespread throughout the environment. While traditional adsorbents such as activated carbon and ion exchange resins have been used to adsorb PFAS from water, the technologies may be limited to certain classes of PFAS compounds. As such, technologies that can address a range of PFAS compounds are needed. In this study, 70 zeolites and molecular sieves with 15 different frameworks and varying pore sizes, framework compositions, and silica−alumina ratios, were tested with 24 PFAS compounds, including perfluoroalkyl carboxylic acids (C4−C14), perfluoroalkanesulfonates (C4− C10), three fluorotelomer sulfonates, NMeFOSAA, FOSA, and NEtFOSAA. PFAS adsorption generally increased with increasing compound hydrophobicity and with molecular sieve ring size. Most β and Faujasite frameworks adsorbed >85% of C8 and larger PFAS compounds. However, β zeolites outperformed all other structures for the sorption of C4−C7 compounds. In addition to the molecular sieves, two calcined hydrotalcites, an aluminum oxide, a magnesium oxide, and an activated carbon were also tested for comparison. The hydrotalcites and activated carbon performed well, adsorbing >74 and >94% of all analytes, while the Al 2 O 3 and MgO adsorbed 43 and 34% on average.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Zeolites for Sorption of PFAS from Water

Ponge,

Sheehan,

Corbin

et al. 2024

Ind. Eng. Chem. Res.

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“…PFOA was chosen as a model PFAS solute due to its widespread usage and its recognition as one the most studied/regulated PFAS species [33]. Stock solutions of 1500 ppm (mg/L) PFOA were prepared using Milli-Q water and stored at room temperature in a high-density polyethylene (HDPE) container.…”

Section: Batch Adsorption On Pfoa Onto Apcnc and Mocp/apcncmentioning

confidence: 99%

Apple Pomace-Derived Cationic Cellulose Nanocrystals for PFAS Removal from Contaminated Water

Franco,

Stuart,

Hossain

et al. 2024

Processes

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Per- and poly-fluoroalkyl substances (PFAS) are concerning contaminants due to their ubiquity, persistence, and toxicity. Conventional PFAS water treatments such as granular activated carbon are limited by low adsorption rates and capacities. Carbon-based nano-adsorbents with enhanced surface areas address these limitations but are hindered by their high cost and toxicity. Cellulose nanocrystals (CNC) are promising PFAS adsorbents due to sustainable sourcing, large surface areas, and amenable surface properties. In this study, CNC was synthesized from the agro-food waste, apple pomace (APCNC), and coated with Moringa oleifera cationic protein (MOCP) aqueous extract to produce MOCP/APCNC for the removal of perfluorooctanoic acid (PFOA) from water. APCNC and MOCP/APCNC were manufactured, characterized, and utilized in PFOA batch adsorption kinetics and equilibrium trials. APCNC was successfully produced from apple pomace (AP) and determined through characterization and comparison to commercial CNC (CCNC). APCNC and MOCP/APCNC exhibited rapid PFOA adsorption, approaching equilibrium within 15 min. MOCP coatings inverted the MOCP/CNC surface charge to cationic (−15.07 to 7.38 mV) and enhanced the PFOA adsorption rate (2.65 × 10−3 to 5.05 × 10−3 g/mg/s), capacity (47.1 to 61.1 mg/g), and robustness across varied water qualities. The sustainable sourcing of APCNC combined with a green surface coating to produce MOCP/CNC provides a highly promising environmentally friendly approach to PFAS remediation.

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“…In addition, soft templates, such as cationic surfactants, amino acids, and silylated polymers, play a crucial role in introducing secondary porosity in the zeolite framework. These types of templates are broadly categorized into two types: primary soft templates and secondary soft templates.…”

Section: Hierarchical Zeolite Synthesismentioning

confidence: 99%

Perspectives on Recent Advances in Hierarchical Zeolites for Bioethanol Conversion to Chemicals, Jet Fuels, and Carbon Nanotubes

Chaipornchalerm,

Prasertsab,

Prasanseang

et al. 2024

Energy Fuels

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Bioethanol, derived from agricultural sources, is considered as one of the promising sustainable alternatives to fossil fuels. Indeed, several catalytic routes can be used to convert bioethanol to valuable chemicals and materials, particularly by employing a zeolite as a catalyst. However, it still suffers from using a conventional zeolite due to the rapid deactivation of the catalyst from pore blockage and acid-site poisoning during bioethanol conversion. To address this challenge, hierarchical zeolites have been explored to enhance molecular diffusion and optimize acidic characteristics, eventually improving catalytic activity and stability. This review provides a comprehensive overview of recent advancements and perspectives in utilizing hierarchical zeolites for bioethanol upgrading. We emphasize the synthesis of hierarchical zeolites and their applications in bioethanol conversion to high-value-added chemicals, such as ethylene, acetaldehyde, butadiene, aromatics, jet fuels, and carbon materials. We highlight both the advantages and challenges associated with hierarchical zeolites as well as the potential for further development of this novel type of catalyst in bioethanol conversion processes.

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Investigation into Cationic Surfactants and Polyelectrolyte-Coated β-Zeolites for Rapid and High-Capacity Adsorption of Short- and Long-Chain PFAS

Cited by 7 publications

References 56 publications

Zeolites for Sorption of PFAS from Water

Zeolites for Sorption of PFAS from Water

Apple Pomace-Derived Cationic Cellulose Nanocrystals for PFAS Removal from Contaminated Water

Perspectives on Recent Advances in Hierarchical Zeolites for Bioethanol Conversion to Chemicals, Jet Fuels, and Carbon Nanotubes

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