Boron removal and recovery from concentrated wastewater using a microwave hydrothermal method

Removal of boron from wastewater by the hydroxyapatite formation reaction using acceleration effect of ammonia

“…Boron removal method by the generation of HAp by microwave technique was treated boron in the solution at 130 • C in the pH 13 [16]. The pH of treated solution was required to be high alkaline solution above pH 12 in the removal of boron by adding of Ca(OH) 2 and phosphate compounds ( Fig.…”

“…Precipitation recovery of boron from wastewater by hydrothermal mineralization as HAp was treated at 130 • C [15,16], but in this method the removal of boron by the hydroxyapatite formation reaction proceeded under room temperature [17]. The XRD patterns of the precipitation product after a few minutes are shown in Fig.…”

“…Boron removal method by the generation of HAp by hydrothermal and microwave techniques for synthetic waste water have also been reported. Hydrothermal treatment to remove high concentration of boron (500 ppm) is effective technique, however these methods need high temperature condition (130 • C) [15,16]. Therefore, the efficient, recyclable and desirable removing boron method from wastewater was developed.…”

Microwave Hydrothermal and Solvothermal Processing of Materials and Compounds

“…The method was shown to have the advantages of short treatment time and high dechlorination efficiency and can be used for treating waste organochlorine pesticides, polychlorobiphenyl oil in transformer, soil and sediment heavily polluted by organochlorine pesticides and polychlorobiphenyl oil, and garbage burning fly ash and chlor-alkali brine sludge containing high-concentration dioxins. Ca(OH)2 alone and Ca(OH)2 with H3PO4 addition (Paddition) were effectively used to remove and recover boron from wastewater using hydrothermal methods (Tsai et al, 2011). A microwave hydrothermal method was also used and compared with the conventional heating method in batch experiments.…”

Potential Chemical Oxo-precipitation (COP) for Remediating Wastewater with a High Boron Concentration using H2O2/Ba(OH)2 at Room Temperature

“…Chemical precipitation is an easy and cost-effective method that is most commonly adopted in industry to remove contaminants at high concentration from water [3,7]. However, co-precipitation methods require severe conditions to achieve highly efficient boron removal, including the extensive use of coagulants (Ca(OH)2 combined with H2SO4 or H3PO4), a relatively high temperature (60-130°C) and a high pH (11)(12)(13) [8,9].…”