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Effects of fluoride content on structure and properties of steel slag glass-ceramics
Highlights Fluoride affected the type of crystal phase and crystallization process. Fluoride contributed to the formation of the Si–O bridge oxygen bonds. Fluoride had abnormal effect in high alkalinity glass. The glass-ceramics with flexural strength of 177.76 MPa can be obtained. Abstract The hot steel slag were utilized for preparing the glass-ceramics by melting method […]
International Steel Industry -
Thermal behaviors of fluoride during (co-)incinerations of spent potlining and red mud: Transformation, retention, leaching and thermodynamic modeling analyses
Highlights Inorganic fluoride behaviors of spent potlining co-incineration were quantified. Addition of red mud positively affected fluoride transformations. . 30% red mud reduced fluoride leaching rate and enhanced retention rate of bottom ash. 66.01% of the total fluoride of the bottom ash was found to be insoluble fluorine. SiO2 and Al2O3 positively affected NaF conversion […]
International Aluminum Industry -
Determination of fluoride component in the multifunctional refining flux used for recycling aluminum scrap
Abstract In this paper, the optimum fluoride component in the multifunctional refining flux used for recycling aluminum scrap was determined. Theoretical analysis of solid fluxing shows that strong stripping ability of oxide layer on aluminum surface for the flux and appropriate interfacial tensions between Al melt / inclusion (o-M-I), flux / inclusion (o-F-I), and flux […]
International -
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