Surface Activity, Wetting, and Aggregation of a Perfluoropolyether Quaternary Ammonium Salt Surfactant with a Hydroxyethyl Group

Molecules, Год журнала: 2023, Номер 28(20), С. 7151 - 7151

Опубликована: Окт. 18, 2023

This paper reports the synthesis of a novel quaternary surfactant containing hydroxyethyl group (PFPE-C) and surface properties its aqueous solution (investigated by comparisons with two structurally similar chemicals, dodecyl-(2-hydroxyethyl)-dimethylammonium chloride (DHDAC) PFPE-A). The minimum tension (γCMC) critical micelle concentration (CMC) PFPE-C were 17.35 mN/m 0.024 mmol/L, respectively. study confirms that surfactants groups efficiently reduce solutions, fluorocarbon exhibit better activity than ordinary hydrocarbon structures. micellization, aggregation, air-water interfacial adsorption, wettability solutions have been systematically investigated. Highly concentrated good on PTFE paraffin films. Moreover, aggregates in clearly seen as vesicles Cryo-TEM micrographs. Primary biodegradation results indicate 19% PFPC-C can be degraded within one week.

Язык: Английский

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Environmental impacts, exposure pathways, and health effects of PFOA and PFOS

Ecotoxicology and Environmental Safety, Год журнала: 2023, Номер 267, С. 115663 - 115663

Опубликована: Ноя. 1, 2023

Per- and polyfluoroalkyl substances (PFAS) are synthetic chemicals that have been widely utilized in various industries since the 1940s, now emerged as environmental contaminants. In recent years, perfluorooctanoic acid (PFOA) perfluorooctane sulfonate (PFOS) restricted replaced with several alternatives. The high persistence, bioaccumulation, toxicity of these contributed to their emergence contaminants, aspects behavior remain largely unknown require further investigation. trace level PFAS makes development a monitoring database challenging. Additionally, potential health issues associated not yet fully understood due ongoing research inadequate evidence (experimental epidemiological studies), especially regard combined effects exposure mixtures human risks from drinking water consumption. This in-depth review offers unprecedented insights into pathways toxicological impacts PFAS, addressing critical knowledge gaps behaviors implications. It presents comprehensive NABC—Needs, Approach, Benefits, Challenges—analysis guide future strategies for sustainable management pervasive

Язык: Английский

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Occurrence, fate, and remediation for per-and polyfluoroalkyl substances (PFAS) in sewage sludge: A comprehensive review

Journal of Hazardous Materials, Год журнала: 2024, Номер 466, С. 133637 - 133637

Опубликована: Янв. 29, 2024

Addressing per-and polyfluoroalkyl substances (PFAS) contamination is an urgent environmental concern. While most research has focused on PFAS in water matrices, comparatively little attention been given to sludge, a significant by-product of wastewater treatment. This critical review presents the latest information emission sources, global distribution, international regulations, analytical methods, and remediation technologies for sludge biosolids from treatment plants. concentrations matrices are typically hundreds ng/g dry weight (dw) developed countries but rarely reported developing least-developed due limited capability. In comparison samples, efficient extraction cleaning procedures crucial detection samples. regulations have mainly soil reuse, only two set limits or with maximum 100 dw major PFAS. Biological using microbes enzymes present considered as having high potential remediation, they eco-friendly, low-cost, promising. By contrast, physical/chemical methods either energy-intensive linked further challenges disposal. The findings this deepen our comprehension guided future recommendations.

Язык: Английский

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Microbial and thermal treatment techniques for degradation of PFAS in biosolids: A focus on degradation mechanisms and pathways

Journal of Hazardous Materials, Год журнала: 2023, Номер 452, С. 131212 - 131212

Опубликована: Март 15, 2023

Per- and polyfluoroalkyl substances (PFAS) are persistent organic chemicals detected in biosolids worldwide, which have become a significant concern for applications due to their increasing environmental risks. Hence, it is pivotal understand the magnitude of PFAS contamination implement effective technologies reduce prevent hazardous aftermaths. Thermal techniques such as pyrolysis, incineration gasification, biodegradation been regarded impactful solutions degrade transform into value-added products like biochar. These can mineralize compounds under specific operating parameters, lead unique degradation mechanisms pathways. Understanding pave way design technology optimize process conditions. Therefore, this review, we aim review compare thermal treatment incineration, smouldering combustion, hydrothermal liquefaction (HTL), biodegradation. For instance, perfluorooctane sulfonic acid (PFOS), firstly C-S bond cleavage occurs followed by hydroxylation, decarboxylation defluorination reactions form perfluoroheptanoic acid. In HTL, PFOS carried through OH-catalyzed series nucleophilic substitution reactions. contrast, involves three-step random-chain scission pathway. The first step includes cleavage, perfluoroalkyl radical, radical chain propagation Finally, termination produces very short-fluorinated units. We also highlighted important policies strategies employed worldwide curb biosolids.

Язык: Английский

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Effective removal of perfluorooctanoic acid from water using PVA@UiO-66-NH2/GO composite materials via adsorption

Journal of Environmental Management, Год журнала: 2024, Номер 368, С. 122248 - 122248

Опубликована: Авг. 23, 2024

Язык: Английский

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Biosolids management and utilizations: A review

Journal of Cleaner Production, Год журнала: 2024, Номер 451, С. 141974 - 141974

Опубликована: Март 26, 2024

Язык: Английский

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Progress on remediation of per- and polyfluoroalkyl substances (PFAS) from water and wastewater using membrane technologies: A review

Journal of Water Process Engineering, Год журнала: 2024, Номер 59, С. 104858 - 104858

Опубликована: Фев. 6, 2024

Язык: Английский

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Contribution of air-water interface in removing PFAS from drinking water: Adsorption, stability, interaction and machine learning studies

Water Research, Год журнала: 2023, Номер 236, С. 119947 - 119947

Опубликована: Апрель 7, 2023

Язык: Английский

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The Application of Polymer Inclusion Membranes for the Removal of Emerging Contaminants and Synthetic Dyes from Aqueous Solutions—A Mini Review

Membranes, Год журнала: 2023, Номер 13(2), С. 132 - 132

Опубликована: Янв. 19, 2023

Pollution of the environment, including water resources, is currently one greatest challenges due to emerging new contaminants anthropogenic origin. Of particular concern are organic pollutants such as pharmaceuticals, endocrine disruptors, and pesticides, but also other industrial pollutants, for example, synthetic dyes. The growing demand environmentally friendly economical methods removing dyes from wastewater resulted in increased interest possibility using techniques based on application polymer inclusion membranes (PIMs) this purpose. PIM-based promising eliminating aqueous solutions, wastewater, high efficiency, versatility, ease/low cost preparation, selectivity. This review describes latest developments related removal various solutions PIMs over past few years, with emphasis research aimed at increasing effectiveness selectivity PIMs, which may contribute wider use these future.

Язык: Английский

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Occurrence, behaviors, and fate of per- and polyfluoroalkyl substances (PFASs) in typical municipal solid waste disposal sites

Water Research, Год журнала: 2024, Номер 252, С. 121215 - 121215

Опубликована: Янв. 27, 2024

Язык: Английский

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