Green extraction of α-nitroso-β-naphthol from wastewater using hydrophobic deep eutectic solvents: A comprehensive study of efficiency and mechanism

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Environmental Pollution Pub Date : 2025-02-12 DOI:10.1016/j.envpol.2025.125855

Jie Qian , Ying-hua Li , Di Luo , Si-nan Liu , Fei Su , Jun-xiang Wang

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Abstract

αNβN is widely used as a typical mineral flotation agent in mining extraction areas, which causes serious environmental risks. In this study, natural hydrophobic deep eutectic solvents (HDES) were innovatively used as extractants to remove αNβN from wastewater. A total of 120 HDES candidates were initially screened via COSMO-RS simulations and validated by batch extraction tests, identifying Dec:Thy (1:3 mol:mol) as the most efficient formulation. Under optimal conditions (pH 7, 25 °C, HDES-to-water ratio 1:50), this HDES achieved over 90% αNβN removal within 1 min of mixing. Characterization (DSC, TGA) confirmed its thermal stability and low viscosity, facilitating rapid phase separation. Reusability experiments further demonstrated that the HDES maintained above 90% extraction efficiency over at least eight consecutive cycles. Molecular dynamics simulations showed that the extraction process was mainly driven by van der Waals forces, with some hydrogen bonding as an aid to enhance the affinity of HDES for αNβN. These findings highlight a green, safe, and effective approach for remediating αNβN-contaminated mining wastewater and underscore the potential of HDES as next-generation extractants for organic pollutants.

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来源期刊

Environmental Pollution 环境科学-环境科学

CiteScore

16.00

自引率

6.70%

发文量

2082

审稿时长

2.9 months

期刊介绍： Environmental Pollution is an international peer-reviewed journal that publishes high-quality research papers and review articles covering all aspects of environmental pollution and its impacts on ecosystems and human health. Subject areas include, but are not limited to: • Sources and occurrences of pollutants that are clearly defined and measured in environmental compartments, food and food-related items, and human bodies; • Interlinks between contaminant exposure and biological, ecological, and human health effects, including those of climate change; • Contaminants of emerging concerns (including but not limited to antibiotic resistant microorganisms or genes, microplastics/nanoplastics, electronic wastes, light, and noise) and/or their biological, ecological, or human health effects; • Laboratory and field studies on the remediation/mitigation of environmental pollution via new techniques and with clear links to biological, ecological, or human health effects; • Modeling of pollution processes, patterns, or trends that is of clear environmental and/or human health interest; • New techniques that measure and examine environmental occurrences, transport, behavior, and effects of pollutants within the environment or the laboratory, provided that they can be clearly used to address problems within regional or global environmental compartments.