latest news: Water Treatment
Showing 10 of 129 Articles:
Adsorption mechanism for removing different species of fluoride by designing of core-shell boehmite
Highlights The species of F–, HF, HF2– played more important role at different pH. The lattice plane (0 0 2) of core-shell Boehmite was the dominant adsorptive face. The Al, O and H sites were adsorptive sites with fluoride species at different pH. The OH– had the competitive effect of adsorption on adsorptive sites at […]International Water Treatment
Application of Octacalcium Phosphate With an Innovative Household-Scale Defluoridator Prototype and Behavioral Determinants of Its Adoption in Rural Communities of the East African Rift Valley
Abstract Natural fluoride contamination of drinking water is a serious issue that affects several countries of the world. Its negative health impact is well documented in the East African Rift Valley, where water consumption with fluoride concentration greater than 1.5 mg/L can cause fluorosis to people. Within the framework of the EU Horizon2020 “FLOWERED” project […]East African Rift Valley Water Treatment
Rapid and extremely high adsorption performance of porous MgO nanostructures for fluoride removal from water
Highlights Porous MgO nanostructures of different morphology have been synthesized. The synthesized MgO nanostructures showed excellent adsorption capacities for fluoride. The Langmuir adsorption capacity are varied from 5716 to 15,691 mg g-1 at 303 K. The adsorption primarily followed pseudo-second-order kinetic. The adsorbents are reusable for successive use up to fifth cycle. Abstract Fluoride is a […]International Water Treatment
Removal of fluoride from multicomponent water solutions with the use of monovalent selective ion-exchange membranes
Highlights Electrodialysis (ED) is an efficient method of fluoride removal ED allows to reduce F– ion content below the guidelines for drinking water Energy consumption is influenced by current density and total salt concentration F– ion removal efficiency enhance with the increase of ionic strength of a solution Fluoride deposition on/in the membrane matrix is […]International Water Treatment
Hydrogeochemical controls on the mobility of arsenic, fluoride and other geogenic co-contaminants in the shallow aquifers of northeastern La Pampa Province in Argentina.
Highlights Shallow groundwater in NE La Pampa province is saline and has elevated arsenic, and fluoride levels Weathering of carbonate minerals controls groundwater chemistry During dry seasons trace elements accumulate in discharge areas due to evaporation Abstract Elevated Arsenic (As) and Fluoride (F) concentrations in groundwater have been studied in the shallow aquifers of northeastern […]Argentina Water Treatment
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
NMSU student receives fellowship to develop filter that removes arsenic and fluoride from the water in Palomas, Mexico
Community Snapshot: Joshua Gomez, who earned his bachelor’s in chemical engineering from New Mexico State University, has earned a fellowship from the National GEM Consortium, tuition for his master’s degree, a stipend for other expenses and two summers of experience conducting research at a national laboratory. As a freshman, Gomez received Environmental Protection Agency funding through NMSU’s Water […]Mexico Water Treatment