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.
Highlights
Due to the high toxicity of heavy metals and bioaccumulation in human body through the food chain, will bring human health and environmental great issue
Suggesting AMC molecules insert the portion between the interlayer space of MMT
Fourier Transform Infrared Spectroscopy (FTIR) spectra of MMT adsorbed with different amounts of AMC displayed both bands of raw MMT and AMC (Figure 3)
Summary
Due to the high toxicity of heavy metals and bioaccumulation in human body through the food chain, will bring human health and environmental great issue. The carcinogenic and toxicity of Cr(VI) is based on its oxidation states like the most transition metals (Yusof and Malek, 2009; Kumar et al, 2017). The classic methods for detecting Cr(VI) include electrochemical method, atomic absorption method and liquid chromatography (Anthemidis et al, 2002; De Ruiter et al, 2008). The sensors made of organic or inorganic materials show great promise in detection, lighting, and other application (Rao et al, 2014)
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