Fabrication of an AMC/MMT Fluorescence Composite for its Detection of Cr(VI) in Water

Abstract

Hexavalent chromium species, Cr(VI), which can activate teratogenic processes, disturb DNA synthesis and induce mutagenic changes resulting in malignant tumors. The detection and quantification of Cr(VI) is very necessary. One of the rapid and simple methods for contaminant analysis is fluorescence detection using organic dye molecules. Its application is limited owing to concentration quenching due to aggregation of fluorescent molecules. In this study, we successfully intercalated 7-amino-4-methylcoumarin (AMC) into the interlayer space of montmorillonite (MMT), significantly inhibited fluorescence quenching. Due to enhanced fluorescence property, the composite was fabricated into a film with chitosan to detect Cr(VI) in water. Cr(VI) can be detected in aqueous solution by instruments excellent, ranging from 0.005 to 100 mM with a detection limit of 5 μM.

Recent advances in film-based fluorescence sensing

“…由于高毒性和不可生物降解性, 重金属离子和某 些金属元素长期以来被认为是主要的有毒环境污染 物. 目前已经开发出对汞离子 [123] 、钯离子 [124] 、铅离 子 [125] 、镉离子 [126] 、三价铬离子 [127,128] 、六价铬离 子 [129] 、二价钴离子 [130] 等检测的荧光薄膜基传感器.…”

Central Metals to Guide the Bandgap of Hourglass-type Polyoxometalate Hybrids as Photocatalyst for the Reduction of Cr(VI)

“…Hexavalent chromium Cr­(VI) as one of the most common heavy metal environmental pollutants widely exists in industrial wastewater from electroplating, smelting, paint, leather, and other industries. − Importantly, Cr­(VI) has high solubility and mobility in water and soil. It can penetrate into the human body through the digestive tract, respiratory tract, skin, and mucosa and accumulate in tissues for a long time, which results in diseases of nerves, muscles, and retina, causing serious damage and genetic defects to human organisms. − With industrialization and urbanization, the pollution of toxic Cr­(VI) heavy metal ions in natural water is becoming more and more serious, and exploring an efficient approach to address Cr­(VI) in water is imminent .…”

Migration of Excitation Energy in Furocoumarins

“…Due to its sensitivity, fluorescence spectroscopy ( Weber et al, 2020 ; Keuler et al, 2021 ) has become one of the most commonly used methods in biomedical research. Coumarin-based sensors hold great promise in detecting residual amounts of heavy metals in the body ( Wei et al, 2018 ). Currently, there is an active search for anticancer drugs ( Shen et al, 2019 ; Spreckelmeyer et al, 2018 ).…”