Boron removal from natural and wastewaters using combined sorption/membrane process

Boron removal from aqueous solution by direct contact membrane distillation

“…Long-term exposure to water with increased boron content can result in malfunctioning of cardiovascular, nervous, alimentary, and sexual systems of humans and animals. Blood composition changes, physical and intellectual progress of children decelerates and risk of the pathological births increases [4][5][6][7]. A standard for boron in drinking water at 0.5 mg/L was adopted in China recently, which was in accordance with the guidance value of boron in drinking water recommended by WHO [8].…”

“…The detection limit for boron was about 0.05 mg/L and the precision was about <3.0% RSD. Anions such as F − , Cl − and SO 4 2− in the natural groundwater were determined by the ion chromatography (861, Metrohm, Switzerland). Alkalinity, carbonate and bicarbonate were measured using an alkalinity titration, the conductivity of the feed was determined by using the conductivity meter (CO150, HACH, USA).…”

Polymeric microspheres with N-methyl-d-glucamine ligands for boron removal from water solution by adsorption–membrane filtration process

“…This reduction in the recommended boron concentration in drinking water has created a challenge as an efficient and inexpensive method for deboronating water that will meet this criterion does not yet exist. Conventional methods, such as sedimentation, adsorption of boron by clay soils or other minerals, evaporation, crystallization, and solvent extraction (Melnyk et al 2005), do not meet the current WHO recommendation. At the present time, the most effective deboronation method is the use of boronselective resins that form a complex with the borate anion (Simonnat et al 2000).…”

New inorganic (an)ion exchangers based on Mg–Al hydrous oxides: (Alkoxide-free) sol–gel synthesis and characterisation

“…There is no mandatory MPC for boron. Drinking water standard for boron adopted by US EPA [15,16], WHO [16] and Japan [17] are relatively: 0.6, 0.3 and 0.2 mg L À1 .…”