Development and characterization of chlorophyll-amended montmorillonite clays for the adsorption and detoxification of benzene

Rivenbark, Kelly J.; Wang, Meichen; Lilly, Kendall; Tamamis, Phanourios; Phillips, Timothy D.

doi:10.1016/j.watres.2022.118788

Cited by 22 publications

(2 citation statements)

References 95 publications

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“…Clays, which are prevalent in soils and sediments, have been extensively studied as potential adsorbents for PFAS. ,,, Naturally occurring clays such as kaolinite are limited in their ability to remove PFAS due to their negatively charged surfaces . Consequently, several strategies have been devised to modify clays for enhanced PFAS removal (Table ).…”

Section: Novel Mineral-based Adsorbents For Pfas Removalmentioning

confidence: 99%

A Comprehensive Review of Novel Adsorbents for Per- and Polyfluoroalkyl Substances in Water

Liu,

Pignatello,

Sun

et al. 2024

ACS EST Water

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Recent literature has seen a significant surge in studies focusing on new adsorbent materials for per-and polyfluoroalkyl substances (PFASg), a class of contaminants found in natural waters worldwide that pose a considerable threat to human and environmental health. Despite growing interest, the fundamental mechanisms of PFAS adsorption on these materials are not fully understood, thus hindering the progress of developing effective solutions for PFAS removal. This Review aims to bridge that knowledge gap by offering a critical appraisal of recent innovations in adsorbent materials specifically designed for treating PFAS. Strategies aimed at enhancing nanopore capacity or introducing anion-exchange capabilities in adsorption materials have shown promise. Innovative materials such as carbon nanotubes, graphene, and graphene oxide are evaluated. Modified clay-based and silica-based adsorbents have demonstrated efficacy in removing PFAS, driven by the hydrophobic effect, Coulombic interactions, and electrostatic interactions. Polymers, ranging from natural types to synthetic variants, have shown promise in PFAS removal across a wide pH range. We discuss mechanisms including F−F interactions, ion-pair adsorption, and ion exchange for chemically and thermally modified adsorbents and provide a general guideline for the design of PFAS adsorbents. This Review offers a holistic view of the advances related to PFAS adsorbent materials.

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Section: Novel Mineral-based Adsorbents For Pfas Removalmentioning

confidence: 99%

A Comprehensive Review of Novel Adsorbents for Per- and Polyfluoroalkyl Substances in Water

Liu,

Pignatello,

Sun

et al. 2024

ACS EST Water

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show abstract

“…In recent years, versatile refractory emerging micropollutants with complex and diverse properties have been frequently detected in various water and wastewaters, which brings great challenges to the remediation of water pollution and the recycling of water resources ( 1 ). Therefore, it is of vital importance to develop efficient and affordable water decontamination technologies, among which advanced oxidation processes (AOPs) aiming at complete destruction of various hazardous pollutants is an indispensable option ( 2 – 9 ). Among various AOPs, the peroxymonosulfate (PMS) based Fenton-like reaction has an excellent effect on removing recalcitrant pollutants in the aqueous phase ( 10 – 13 ).…”

mentioning

confidence: 99%

Fenton-like activity and pathway modulation via single-atom sites and pollutants comediates the electron transfer process

Guo,

Wang,

Shang

et al. 2024

Proc. Natl. Acad. Sci. U.S.A.

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The studies on the origin of versatile oxidation pathways toward targeted pollutants in the single-atom catalysts (SACs)/peroxymonosulfate (PMS) systems were always associated with the coordination structures rather than the perspective of pollutant characteristics, and the analysis of mechanism commonality is lacking. In this work, a variety of single-atom catalysts (M-SACs, M: Fe, Co, and Cu) were fabricated via a pyrolysis process using lignin as the complexation agent and substrate precursor. Sixteen kinds of commonly detected pollutants in various references were selected, and their ln k obs values in M-SACs/PMS systems correlated well ( R 2 = 0.832 to 0.883) with their electrophilic indexes (reflecting the electron accepting/donating ability of the pollutants) as well as the energy gap ( R 2 = 0.801 to 0.840) between the pollutants and M-SACs/PMS complexes. Both the electron transfer process (ETP) and radical pathways can be significantly enhanced in the M-SACs/PMS systems, while radical oxidation was overwhelmed by the ETP oxidation toward the pollutants with lower electrophilic indexes. In contrast, pollutants with higher electrophilic indexes represented the weaker electron-donating capacity to the M-SACs/PMS complexes, which resulted in the weaker ETP oxidation accompanied with noticeable radical oxidation. In addition, the ETP oxidation in different M-SACs/PMS systems can be regulated via the energy gaps between the M-SACs/PMS complexes and pollutants. As a result, the Fenton-like activities in the M-SACs/PMS systems could be well modulated by the reaction pathways, which were determined by both electrophilic indexes of pollutants and single-atom sites. This work provided a strategy to establish PMS-based AOP systems with tunable oxidation capacities and pathways for high-efficiency organic decontamination.

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Toxicity of representative organophosphate, organochlorine, phenylurea, dinitroaniline, carbamate, and viologen pesticides to the growth and survival of H. vulgaris, L. minor, and C. elegans

Rivenbark,

Nikkhah,

Wang

et al. 2024

Environ Sci Pollut Res

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Development and characterization of chlorophyll-amended montmorillonite clays for the adsorption and detoxification of benzene

Cited by 22 publications

References 95 publications

A Comprehensive Review of Novel Adsorbents for Per- and Polyfluoroalkyl Substances in Water

A Comprehensive Review of Novel Adsorbents for Per- and Polyfluoroalkyl Substances in Water

Fenton-like activity and pathway modulation via single-atom sites and pollutants comediates the electron transfer process

Toxicity of representative organophosphate, organochlorine, phenylurea, dinitroaniline, carbamate, and viologen pesticides to the growth and survival of H. vulgaris, L. minor, and C. elegans

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