Next to water, tea is the most popular beverage in the world and for good reason. Numerous studies have linked the consumption of tea to reduced cancer and cardiovascular risks as well as a way to prevent Alzheimer’s disease. But despite its well-researched health benefits, some scientists warn that sipping certain varieties of teas can […]
News Archive
Welcome to the Fluoride Action Network News Archive. The FAN News Archive serves as an historical repository for fluoride news stories, positive or negative. Since FAN catalogs all news stories on fluoride, our news section remains a reliable database of all published fluoride news.
Our news database is categorized by country, state/province, and industry. This collection of articles is constantly being updated with the most recent global news on fluoride-related issues and events.
Simplified Batch and Fixed-Bed Design System for Efficient and Sustainable Fluoride Removal from Water Using Slow Pyrolyzed Okra Stem and Black Gram Straw Biochars
Abstract Okra stem biochar (OSBC) and black gram straw biochar (BGSBC) were prepared by slow pyrolysis at 500 and 600 °C, respectively. OSBC and BGSBC were characterized using SBET, Fourier transform infrared, X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy, SEM–energy dispersive X-ray, and energy dispersive X-ray fluorescence. High carbon contents (dry basis) of […]
Hydrolysis of Formyl Fluoride Catalyzed by Sulfuric Acid and Formic Acid in the Atmosphere.
Abstract Formyl fluoride (HFCO) is an important atmospheric molecule, and its reaction with the OH radical is an important pathway when degradation of HFCO is considered in earth’s troposphere. Here, we study the hydrolysis of formyl fluoride (HFCO + H2O) with sulfuric acid (H2SO4) and formic acid (HCOOH) acting as catalysts by utilizing M06-2X, CCSD(T)-F12a, […]
Astronomers map new emission line to trace most common molecule in the universe
Molecular hydrogen (H2) makes up 99 percent of the cold, dense gas in galaxies. So mapping where stars are born basically means measuring H2, which lacks a strong characteristic signature at low temperatures. Astronomers from SRON Netherlands Institute for Space Research and the University of Groningen have now mapped an emission signal from the trace […]
The role of fluoroaluminate complexes on the adsorption of fluoride onto hydrous alumina in aqueous solutions
Note from Fluoride Action Network: “Since all methods [to remove fluoride] produce a sludge with very high concentration of fluoride that has to be disposed of, only water for drinking and cooking purposes should be treated, particularly in the developing countries.” Reference: Fluorosis (see Interventions), World Health Organization Abstract Activated alumina (AA) has been extensively […]
Fluoride removal by Ca-Al-CO3 layered double hydroxides at environmentally-relevant concentrations.
Highlights Ca–Al–CO3 layered double hydroxides showed affinity for F– at 2–12 mg/L. A higher F– removal capacity at lower pH and lower temperature was observed. Only marginal defluorination improvements by calcination/microwave treatment. Fast F– uptake during the initial 20?min and little anions competition was observed. F– removal capacity is not necessarily reflected in specific surface […]
Origin of hydrogen fluoride emission in the Orion Bar. An excellent tracer for CO-dark H2 gas clouds
Abstract Context. The hydrogen fluoride (HF) molecule is seen in absorption in the interstellar medium (ISM) along many lines of sight. Surprisingly, it is observed in emission toward the Orion Bar, which is an interface between the ionized region around the Orion Trapezium stars and the Orion molecular cloud. Aims. We aim to understand the […]
Fluoride-Ion Batteries: On the Electrochemical Stability of Nanocrystalline La0.9Ba0.1F2.9 against Metal Electrodes.
Abstract Over the past years, ceramic fluorine ion conductors with high ionic conductivity have stepped into the limelight of materials research, as they may act as solid-state electrolytes in fluorine-ion batteries (FIBs). A factor of utmost importance, which has been left aside so far, is the electrochemical stability of these conductors with respect to both […]
A simple method for detection of low concentrations
Highlights A simple, reagent-free, non-colourimetric method for detection of fluoride in water at drinking-water-relevant 0–5?mg?L?1 concentration range. Optical fibre tip coated with aluminum by sputter deposition is degraded in the presence of fluoride, decreasing internal reflection of infrared light. Kinetics of coating degradation are correlated to fluoride concentration. Abstract Naturally occurring elevated levels of fluoride […]
Green tea or black tea: Which one should you choose?
Note from the Fluoride Action Network This writer knows little of the potential dangers of over-exposure to fluoride. Too much fluoride can lead to a lack of elasticity in the bone as well as the potential for bone fractures. We add this article for historical purposes only. (EC) Excerpt Black tea is better for bone […]