Removal of toxic pollutants from aqueous medium through adsorption: a review

Shafique, Asma

doi:10.5004/dwt.2021.27550

Cited by 10 publications

(1 citation statement)

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“…In recent years, environmental issues have attracted great attention, such as issues of air pollutants, water pollutants, and pesticide problems. − Besides, the development of pollutant sensing has attracted increasing interest because of the issues of toxic chemicals and environmental sustainability. One of the toxic agricultural pollutants in the environment is paraquat, which is harmful to human beings. − Paraquat is one of the viologen families, which has positively charged nitrogen atoms in bipyridinium structures.…”

Section: Introductionmentioning

confidence: 99%

Pyranine-Grafted Nanoporous Membranes for Sensing Paraquat Derivatives

Lee

Lin

et al. 2023

ACS Appl. Nano Mater.

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Toxic agricultural pollutants in the environment, such as paraquats, are harmful to human beings. In this study, we provide a feasible method for sensing three kinds of paraquat derivatives. Anodic aluminum oxide (AAO) membranes are used as substrates to detect paraquat derivatives owing to their properties of highly porous structures and chemical stabilities. After pyranine molecules are chemically modified on the surface of AAO templates, pyraninegrafted AAO (P-AAO) membranes are obtained, which can be used for sensing paraquat derivatives by π−π electron stacking interactions, Coulombic attractions, and charge-transfer interactions. The changes of absorption intensities in ultraviolet−visible (UV−vis) spectra and alternations of impedance in Nyquist plots are observed by sensing the paraquat derivatives with P-AAO membranes. The P-AAO membranes show remarkable sensibility and immediacy during the processes of sensing paraquat derivatives, and the limit of detection (LoD) reaches 0.9 μM. This work successfully demonstrates that P-AAO membranes can be an excellent choice for detecting pollutants in the environment and industry.

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