The Chemistry of Boron in Water

Kochkodan, Victor; Darwish, Nawaf Bin; Hilal, Nidal

doi:10.1016/b978-0-444-63454-2.00002-2

Cited by 51 publications

(24 citation statements)

References 57 publications

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“…Studies related to the detailed analysis of boron chemistry have shown that molecules with vicinal diols are capable of forming borate complexes with boron moieties in aqueous solutions (Fig. 4(a)) [41]. This capability indicates the possibility of designing new boron-specific adsorbents based on this chemistry.…”

Section: Chelating Resinsmentioning

confidence: 96%

An updated review on boron removal from water through adsorption processes

et al. 2021

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Boron is an essential micronutrient that has raised much interest, given the narrow balance between its necessity and toxicity. Both natural and anthropogenic emissions of boron into water sources can eventually deteriorate water quality and endanger the ecosystem. In this review, we first present a general outline of the importance of boron, boron chemistry in water, boron contamination, and its consequences followed by the recent progress in boron removal methods based on adsorption. The adsorbents for deboronation can generally be classified based on the functional groups present; chelating groups, metal oxides, and layered double hydroxides. To comprehensively address these adsorption methods, a detailed discussion on the reaction mechanism of each system is done followed by a summary of the progress in the field during the past 5 years. Finally, some characterization techniques used in deboronation studies and suggestions for future research and applications together with possible improvements to the existing systems are presented. Graphical abstract

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Section: Chelating Resinsmentioning

confidence: 96%

An updated review on boron removal from water through adsorption processes

et al. 2021

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“…The incidence of Boron was evaluated individually and together with the other ions for the three salinity levels, in all cases, no changes were observed in the stability diagrams. It is well known that CO3 2-/HCO3 -and B(OH)4 -/B(OH)3 ions are responsible for the alkaline pH of seawater, as well as its buffering capacity (Kochkodan et al, 2015). However, the latter does not generate copper complexes that can be seen in the diagrams.…”

Section: Methodsmentioning

confidence: 99%

Pourbaix diagrams for copper ores processing with seawater

Marin¹,

Ordóñez²,

Gálvez³

et al. 2020

Physicochem. Probl. Miner. Process.

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Decreases in the copper grade, waste disposal, energy supply, and water scarcity are some of the most critical challenges for the copper mining industries. One of the alternatives to counteract the water scarcity is the use of seawater, whether raw, partially desalinated, or desalinated. The use of seawater implies the generation of several compounds as a result of the interaction of ions in waters and ores. For this reason, it is required a greater understanding of these compounds generated on mineral processing, being Pourbaix diagrams used to estimate the possible compounds that will be formed in an aqueous medium for a given metal ore. In this paper, the effect of temperature, salinity, and Cu-concentration on the stability of the copper-solid species was investigated by constructing Pourbaix diagrams for different copper ore types with seawater. The results show that the corrosion areas decrease when the temperature increases for both oxidized and sulfide minerals. It was confirmed that the concentration is a critical variable that influences the size of corrosion areas. In terms of the effect of the other ions that seawater contains, carbonate, chloride, and bromide affect the stability of the Cu-solid species. The proposed diagrams serve as a useful tool to predict the stable species that may be obtained when seawater is used. The use of seawater in mining is an essential issue because it is considered as a more sustainable alternative instead of use freshwater or desalinated seawater, especially in locations with complex water availability, as is northern Chile.

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“…The pKa of boric acid at room temperature is 9.24. Boric acid in natural water comes from the leaching of soils and rocks, as well as the wastewater from the glass/ceramic and metallurgy industries [ 1 ]. In an alkali solution it forms a borate salt, while in vicinal diol compound solution it forms boron ester.…”

Section: Introductionmentioning

confidence: 99%

Chelating Fabrics Prepared by an Organic Solvent-Free Process for Boron Removal from Water

et al. 2021

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A chelating fabric was prepared by graft polymerization of glycidyl methacrylate (GMA) onto a nonwoven fabric, followed by attachment reaction of N-methyl-D-glucamine (NMDG) using an organic solvent-free process. The graft polymerization was performed by immersing the gamma-ray pre-irradiated fabric into the GMA emulsion, while the attachment reaction was carried out by immersing the grafted fabric in the NMDG aqueous solution. The chelating capacity of the chelating fabric prepared by reaction in the NMDG aqueous solution without any additives reached 1.74 mmol/g, which further increased to above 2.0 mmol/g when surfactant and acid catalyst were added in the solution. The boron chelation of the chelating fabric was evaluated in a batch mode. Fourier transform infrared spectrophotometer (FTIR) was used to characterize the fabrics. The chelating fabric can quickly chelate boron from water to form a boron ester, and a high boron chelating ability close to 18.3 mg/g was achieved in the concentrated boron solution. The chelated boron can be eluted completely by HCl solution. The regeneration and stability of the chelating fabric were tested by 10 cycles of the chelation-elution operations. Considering the organic solvent-free preparation process and the high boron chelating performance, the chelating fabric is promising for the boron removal from water.

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The Chemistry of Boron in Water

Cited by 51 publications

References 57 publications

An updated review on boron removal from water through adsorption processes

An updated review on boron removal from water through adsorption processes

Pourbaix diagrams for copper ores processing with seawater

Chelating Fabrics Prepared by an Organic Solvent-Free Process for Boron Removal from Water

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