Sorption-membrane removal of boron compounds from natural and waste waters: Ecological and economic aspects

Mel’nik, L. A.; Butnik, I. A.; Гончарук, В. В.

doi:10.3103/s1063455x08030065

Cited by 19 publications

(5 citation statements)

References 17 publications

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“…[11][12][13] Boron is essential to humans for the proper functioning of many organs, but excess consumption through water and food has adverse effects, such as neurological effects, blood composition changes and weight loss in children, and is particularly dangerous for pregnant women. 11,14 Boron exists mainly in water as B(OH) 3 and B(OH) 4 À , which is highly soluble in water, and difficult to remove from aqueous sources. The chemistry of boron shows that adsorbents containing molecules with vicinal diols (HO-CH 2 -CH 2 -OH) can form a complex with boron either by bidentate or bis-bidentate borate complexes in aqueous media.…”

Section: Introductionmentioning

confidence: 99%

Magnetic mesoporous silica hybrid nanoparticles for highly selective boron adsorption

et al. 2013

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Novel core-shell magnetic mesoporous silica hybrid nanoparticles were synthesized and functionalized further with a glycidol reagent to produce boron-specific cis-diol, chelating functional derivatives. The resulting core-shell hybrid nanoparticles were found to be a better alternative to the existing boron adsorbents that had been modified with large molecular weight saccharide moieties and polymer functionalities. The magnetic mesoporous silica hybrid nanoparticles had a surface area, diameter, pore size, and saturation magnetization of 629 m 2 g À1 , 200-300 nm, 2.5 nm, and 33.25 emu g À1 , respectively. The glycidol-modified nanoparticles with cis-diol functional groups showed high adsorption affinity and excellent selectivity towards boron in an aqueous solution, even in the presence of competitive metal ions (Ni 2+ , Cu 2+ , Cr 2+ and Fe 2+ ) and sulphates and chlorides of Na + , K + , Ca 2+ and Mg 2+ ions. Adsorption equilibrium could be established within 15-20 min, and the level of boron adsorption was 2.37 mmol g À1 , which is much higher than the values previously reported for other boron adsorbent materials. The synthesized magnetic mesoporous silica hybrid nanoparticles showed approximately 97% boron removal capacity from a H 3 BO 3 solution (100 mg L À1 ), and the used adsorbent particles could be separated easily from the aqueous suspensions by an external magnetic field. The adsorbent could be used repeatedly after a simple acid treatment (0.1 M HCl) and regenerated by an aqueous ammonia solution (3% NH 3 $H 2 O).

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Section: Introductionmentioning

confidence: 99%

Magnetic mesoporous silica hybrid nanoparticles for highly selective boron adsorption

et al. 2013

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“…19 While boron is an important element in humans' diet, long-term consumption of water or food with increased boron concentrations can negatively impact the cardiovascular, coronary, nervous, and reproductive systems. [20][21][22] The concentration of boron in the sea is as high as 4 to 5 mg L −1 . 19 The guideline value for boron concentration in drinking water established by the World Health Organization is 2.4 mg L −1 .…”

Section: Introductionmentioning

confidence: 99%

Emerging investigator series: post-synthesis modification of reverse osmosis membranes for the enhanced separation of small neutral molecules

Habib,

Wilkins,

Weinman

2023

Environ. Sci.: Water Res. Technol.

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“…Many researchers have also investigated ED processes used for the removal of acid, salt, and heavy metal mixtures from aqueous solutions (18); boron compounds removal from natural and waste waters (19); elimination of nitrate from ground water (in regions where agricultural activities are highly intensive) (20); removal of fluoride from geo-thermal water (21); recovery of organic acids from waste salt solutions derived from the manufacture of cyclohexanone (22); and salt recovery from a process stream containing organic contaminants (23).…”

Section: Introductionmentioning

confidence: 99%

NaOH Recovery from MEROX Tower Waste Stream Using the Electrodialysis Process

Keramati¹,

Moheb²,

Ehsani³

2010

Separation Science and Technology

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Electrodialysis with two different configurations was used for the recovery of NaOH from the waste stream of a MEROX tower. For this purpose, the effects of cell applied voltage and initial Na þ concentration in the feed solution on NaOH recovery and current efficiency were studied. Results showed that the recovery and current efficiency were improved by increasing the initial Na þ concentration. Also, increasing applied voltage had different effects on current efficiency. A NaOH recovery of about 70% and a current efficiency of 98% for a three-compartment cell at 15 volts showed that the method can be considered as a promising one for NaOH recovery from the waste stream of a MEROX tower.

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Sorption-membrane removal of boron compounds from natural and waste waters: Ecological and economic aspects

Cited by 19 publications

References 17 publications

Magnetic mesoporous silica hybrid nanoparticles for highly selective boron adsorption

Magnetic mesoporous silica hybrid nanoparticles for highly selective boron adsorption

Emerging investigator series: post-synthesis modification of reverse osmosis membranes for the enhanced separation of small neutral molecules

NaOH Recovery from MEROX Tower Waste Stream Using the Electrodialysis Process

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