Removal of boron from wastewater by precipitation of a sparingly soluble salt

Remy, Patricia; Muhr, Hervé; Plasari, Edouard; Ouerdiane, Imen

doi:10.1002/ep.10058

Cited by 66 publications

(23 citation statements)

References 11 publications

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“…There are various techniques for removing boron from aqueous solutions, and typical methods include coagulationsedimentation (del Mar de la Fuente Garcia-Soto and Camacho 2006; Remy et al 2005), a membrane separation process using reverse osmotic pressure (Qin et al 2005;Turek et al 2007), solvent extraction (Matsumoto et al 1997), evaporation to dryness under reduced pressure (Spicer and Strickland 1958) and adsorption removal using ion-exchange resin, inorganic adsorbent, and organic adsorbent (Yoshimura et al 1998;Ozturk and Kavak 2008;Kaftan et al 2005;Sabarudin et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Boron adsorption mechanism on polyvinyl alcohol

et al. 2010

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Recently, an increase in the use of boron compounds has led to an increase in boron emissions, and concern has grown regarding its detrimental effects on the human body. An adsorbent that adsorbs boron selectively has been developed as a countermeasure. Although certain commercially available boron selective adsorbents can be used to remove boron from aqueous solutions by utilizing the strong affinity between boron and hydroxyl groups, the adsorption capacity appears to be insufficient. So, we adopted polyvinyl alcohol (PVA), which contains many hydroxyl groups, as a model adsorbent. We investigated the boron adsorption characteristics of PVA, and then studied the relationship between the number of adsorption sites and actual adsorption amounts. We assessed the adsorption result by using adsorption site availability (ASA) as an indicator of the ratio of effectively functioning hydroxyl groups from the many hydroxyl groups in PVA. ASA was expressed as a percentage of the experimental equilibrium adsorbed amount in relation to the theoretical equilibrium adsorbed amount. We also compared the adsorption isotherms and ASA obtained with PVA, commercially available N-methylglucamine-type resin (CRB03 and CRB05) and the adsorbent we synthesized from polyallylamine (PAA) and glucose (PAA-Glu). Although PVA has many hydroxyl groups in a molecule, ASA analysis revealed that only 6% of the hydroxyl groups in PVA was used for boron adsorption. On the other hand, CRBs and PAA-Glu exhibited higher ASA values (about 15% and 35% respectively) and adsorption amounts, sug-

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Section: Introductionmentioning

confidence: 99%

Boron adsorption mechanism on polyvinyl alcohol

et al. 2010

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“…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].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2014

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Among current approaches for removing boron, chemical precipitation is widely used for treating wastewater that contain a high boron concentration. The need for heating and very large amounts of coagulant limits the efficiency of this method. Accordingly, this work developed a chemical oxo-preceipitation (COP) method, which uses hydrogen peroxide (H2O2) as the oxidant and barium hydroxide (Ba(OH)2) as the precipitant to improve considerably the chemical precipitation of wastewater with a high concentration of boron at room temperature. Under suitable conditions (pHi 9, mole ratio of H2O2/B = 2, and mole ratio of Ba/B = 0.8), boron can be efficiently removed from solution by forming amorphous precipitates of barium perborate. After four hours, amorphous barium perborate was transformed to a particular species with a crystalline phase. Consequently, the boron concentration was reduced from 1000 mg/L to 2 mg/L in six hours. The results of XRD, Raman spectroscopy and ICP prove that a dinuclear perborate with double peroxo bridges constituted the crystalline precipitate whose chemical formula was found to be BaB2(O2)2(OH)4-n (OOH)n.

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“…Boron removal has been extensively studied in the field of wastewater treatment, and several methods such as chemical precipitation [7], adsorption [8], extraction [9], biological method [10] are known. As immobilization mechanisms for boron by magnesium oxide, precipitation of magnesium borates [11] and formation of an inner-sphere complex on the surface of brucite [12] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dissolved Silica on Immobilization of Boron by Magnesium Oxide

2018

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Abstract:The effect of silica on the immobilization reaction of boron by magnesium oxide was investigated by laboratory experiments. In the absence of silica, due to dissolution of the magnesium oxide, boron was removed from solutions by the precipitation of multiple magnesium borates. In the presence of silica, magnesium silica hydrate (M-S-H) was formed as a secondary mineral, which takes up boron. Here 11 B magic-angle spinning nuclear magnetic resonance (MAS-NMR) and Fourier transform infrared spectrometer (FT-IR) data show that a part of the boron would be incorporated into M-S-H structures by isomorphic substitution of silicon. Another experiment where magnesium oxide and amorphous silica were reacted beforehand and boron was added later showed that the shorter the reaction time of the preceding reaction, the higher the sorption ratio of boron. That is, boron was incorporated into the M-S-H mainly by coprecipitation. The experiments in the study here show that the sorption of boron in the presence of silica is mainly due to the incorporation of boron during the formation of the M-S-H structure, which suggests that boron would not readily leach out, and that stable immobilization of boron can be expected.

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Removal of boron from wastewater by precipitation of a sparingly soluble salt

Cited by 66 publications

References 11 publications

Boron adsorption mechanism on polyvinyl alcohol

Boron adsorption mechanism on polyvinyl alcohol

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

Effect of Dissolved Silica on Immobilization of Boron by Magnesium Oxide

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