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Enhanced fluoride removal from drinking water using non-calcined synthetic hydroxyapatite
Highlights Simple method of Hydroxyapatite (HAP) synthesis has been proposed. Un-calcined HAP shows higher fluoride removal than calcined HAP. HAP’s dissolution results in increasing fluoride removal capacity. HAP shows higher defluoridation capacity in synthetic groundwater than distilled water. Design methodology for packed bed HAP column for defluoridation has been suggested. Abstract Elevated level of fluoride […]International Water Treatment
Removal of fluoride and hydrated silica from underground water by electrocoagulation in a flow channel reactor.
Highlights Abatement of fluoride and silica from underground water by electrocoagulation. Flow channel cell with aluminum electrodes open to the atmosphere to favor H2 exit. Significant aluminum dosages were produced at current densities >6 mA cm–2. Hydrated silica reacted with the coagulant forming aluminosilicates as flocs. The removal of fluoride followed the WHO recommendation, while […]International Water Treatment
Simultaneous removal of fluoride and Fe (II) ions from drinking water by electrocoagulation.
Abstract Present work reports experimental investigations on simultaneous removal of fluoride and Fe (II) ions from drinking water by electrocoagulation (EC) with aluminium electrode having submerged electrode surface area of 116 cm2. During experimental studies, effects of pH, current density (Cd), inter-electrode distance (Id) and NaCl dose (Csi) were investigated to identify their influence on […]International Water Treatment
Fluoride removal by palm shell waste based powdered activated carbon vs. functionalized carbon with magnesium silicate: Implications for their application in water treatment.
Highlights MgSiO3 impregnated on PSAC for fluoride removal was studied for the first time. MPSAC showed higher fluoride adsorption capacities compared to PSAC. Anions inhibited F? adsorption with the following sequence: Cl– < NO3– < SO42-. PSAC had stable sequestration capacities of fluoride due to strong C–F bond formation. MPSAC had high regeneration capacities for […]International Water Treatment
Demand increasing for boiler cleaning
There has been a significant increase in demand for industrial and chemical cleaning solutions provider Gra-Tech’s chemical cleaning of package boilers, as industries in which package boilers are used are looking to optimise operational efficiencies and reduce costs. Package boilers are smaller output boilers than those used in general industry. These differ from traditional boilers […]International Miscellaneous
Sulfuryl fluoride fumigation to control brown marmorated stinkbug (Hempitera: Pentatomidae)
Note from Fluoride Action Network This abstract makes no mention of the severe neurotoxicity of sulfuryl fluoride, which we learned from Dow’s animal studies (search Brain here). This fumigant is used to fumigate post-harvest food (in the U.S. and Australia), structures, and pest infestations. Sulfuryl fluoride should be banned and safer methods are needed to […]International Pesticides
Removal of fluoride from fertilizer industry effluent using carbon nanotubes stabilized in chitosan sponge.
Highlights All assays were performed using gas scrubber effluent from the production of fertilizer industry. Carbon nanotube was anchored onto chitosan sponge and used like adsorbent. The adsorption capacity for fluoride reach around 975.4 mg g-1 in kinetic assays. Reuse and regeneration were investigated and 5 cycles were obtained. The adsorption capacity kept similar values […]International Phosphate Industry
Comparative efficacy of a hydroxyapatite and a fluoride toothpaste for prevention and remineralization of dental caries in children.
Abstract Objective: This in situ study compared the effectiveness of two toothpastes containing hydroxyapatite or 500 ppm fluoride in promoting remineralization and inhibiting caries development. Materials and methods: Two enamel blocks (human primary teeth), one sound and one with artificially-produced caries lesion, were exposed to toothpaste containing either 10% hydroxyapatite or 500 ppm F– (amine […]International Toothpaste
What, no fluoride? Other ways to improve oral health
Your patients may prefer to avoid fluoride for diverse reasons. The good news is that there are many innovative fluoride-free dental products that can help these patients maintain oral health. Fluoride is a mineral naturally found in soil, water, and foods, and not quite the poison some would argue. It has a negative connotation when […]International Toothpaste
Toothpaste recommendations for the very young
Note from the Fluoride Action Network: We added this to the NewsTracker for historical purposes only. (EC) Excerpt Experts recommend that even children who are too young to spit the toothpaste out themselves should use fluoridated toothpaste. The American Academy of Pediatric Dentistry (AAPD) recommend that parents or caregivers use a minuscule amount of fluoridated […]International Toothpaste