Boron removal by means of adsorption with magnesium oxide

Sorption properties of boron on Mg–Al bimetallic oxides calcined at different temperatures

“…4, which also included the results shown in Mg-Al1073 exhibited the highest sorption density for B when Ce = 4.0 mM. In addition, the Q values for Mg-Al873 and MgAl1073 were higher than the B sorption capacities for MgO obtained from MgCO 3 via calcination at 873-1073 K for 1 h. It has been previously suggested that MgO immobilizes B as a coprecipitate of Mg(OH) 2 [15,16,29] and that MgO calcined at higher temperatures has greater basicity per unit surface area and thus a greater B sorption density [29]. However, in the present study, the Mg-Al bimetallic oxides with lower basicities per unit surface area (as indicated by the CO 2 -TPD results) than calcined MgO (see Supplementary material Table S1) exhibited greater B sorption densities.…”

“…Therefore, the development of a sorbent that meets requirements for cost effectiveness, reactivity, availability, and permeability is necessary. Recently, MgO is been found to be an effective and promising sorbent for boron removal [15][16][17].…”

Boron removal from aqueous solution by batch adsorption using Box–Behnken design

“…Adsorption for boron removal using cheap and easily attainable adsorbent is substantially beneficial, effective, economic, and quite easily applied method principally at low boron concentrations [10]. Up to the present, various adsorbents including aluminum-based water treatment residuals [12], calcareous soils [13], fly ash [10,14], goethite [2], magnesium oxide [15,16], magnetic particles [17], alumina [18], activated carbon [19], and calcined magnesite tailing [5] were evaluated for boron removal from aqueous solution. Granular ferric hydroxide (GFH) is a dominantly akaganeite material and recognized adsorbent for arsenate and arsenite removal [20].…”

Characteristic Sorption of H₃BO₃/B(OH)₄^− on Magnesium Oxide

“…Based on this mechanism, immobilized B species have been regarded as B(OH) 4 ¹ . 22) In the present work, a mechanism for borate removal by MgO will be discussed based on observation by several techniques. Understanding the mechanism will facilitate optimization of the properties of MgO as an industrial sorbent for borate, because it is usually produced by calcination of natural magnesite (MgCO 3 ) and/or hydromagnesite (Mg 2 (CO 3 )(OH) 2 ).…”