Adsorption of fluoride ion on the zirconium(IV) complexes of the chelating resins functionalized with amine-N-acetate ligands

Polymeric anion exchanger supported hydrated Zr(IV) oxide nanoparticles: A reusable hybrid sorbent for selective trace arsenic removal

“…But, without a proper support, nanoparticles are mechanically fragile. To improve mechanical strength and removal capacity, HZOs have been loaded into many supports, namely, chelating resins [57][58][59], collagen fibers, activated carbon, chitosan [60][61][62][63], unfunctionalized polymers [18,64,65], etc. Note that activated carbon, zeolite, alginate, cation exchangers, chelating resins, etc.…”

Zr(H2O)2EDTA modulated luminescent carbon dots as fluorescent probes for fluoride detection

“…These observations could be ascribed to the stronger affinity of F À to Zr(H 2 O) 2 EDTA (log K 1 ¼ 4.7, log K 2 ¼ 2.8) 24 compared with the -COOH on the surface of CDs. The signicant shi of the 19 F-NMR peaks (122.38 ppm, 131.57 ppm) relative to the location of the free F À upon the addition of F À to the Zr(H 2 O) 2 EDTA aqueous solution 7 and the DF of the system not only conrmed the formation of Zr(F) 2 EDTA, but also demonstrated the properties of this automatic on-off uorescent probe.…”

“…Up to now, a variety of available methods for F À detection have been reported, such as ion chromatography (IC), 6 19 F NMR, 7 uoride selective electrodes, 8 uorescence capillary electrophoresis, 9 colorimetry based on La(III), Ce(III) and Zr(IV) complexes with dye compounds, [10][11][12][13][14][15][16] uoride sensors based on uorescence resonance energy transfer 17 and so forth. Unfortunately, the low sensitivity of uorescence capillary electrophoresis and colorimetry, the poor reproducibility of IC and uoride selective electrodes, the high cost of 19 F NMR, the inevitable use of organic solvents as the detection medium, the instability of colorimetry 15 and the environmental pollution caused by the used organic dyes and semiconductor quantum dots seriously limits their application and development.…”

Multicolorful ratiometric-fluorescent test paper for determination of fluoride ions in environmental water

“…6 Therefore, it is an urgent demand for human health to effectively quantify F À in drinking water. Traditional methods, including 19 F NMR spectroscopy, 7 ion-selective electrodes 8 and ion chromatography, 9 inevitably require relatively cumbersome equipment, complicated pre-treatments of samples, and professional operators, which hinder their application in the convenient and effective detection of F À .…”