NDLI: High boron removal by functionalized magnesium ferrite nanopowders

Content Provider	Springer Nature Link
Author	Oladipo, Akeem Adeyemi Gazi, Mustafa
Copyright Year	2016
Abstract	Hydroxyl-enriched materials are promising boron adsorbents. However, the use of these materials is hampered by issues of separation, recovery, and selectivity, notably due to the presence of interfering ions. Therefore, we synthesized here a cheap magnetic nanopowder, which was further functionalized with polyvinyl alcohol and glycidol to produce boron-selective adsorbents. We studied their selectivity and removal efficiency using batch and fixed-bed systems. Sorption was studied at both concentrated and trace amounts of boron. Results show that nanopowders have 5.3–6.5 nm pore sizes and 145–203 m2/g surface areas, using Brunauer–Emmett–Teller analysis. Polyvinyl alcohol-functionalized particles removed 93 % of boron at 5 mg/L at pH 7 in 30 min, whereas only 68 % of boron was removed by glycidol-functionalized particles. However, at higher boron concentration, of 50 mg/L, glycidol-functionalized particles showed higher adsorption affinity of 68.9 mg/g. We conclude that internal hydroxyl groups of polyvinyl alcohol-functionalized particles are less accessible at higher boron concentration. This is the first report on magnesium ferrites for boron recovery. The spent adsorbents were separated easily from the aqueous media by an external magnet and repeatedly used. Overall, our findings demonstrated that the hydroxyl-enriched magnetic nanopowders are a better alternative to the existing boron adsorbents regarding magnetic separation, reusability, and selectivity.
Starting Page	373
Ending Page	379
Page Count	7
File Format	PDF
ISSN	16103653
Journal	Environmental Chemistry Letters
Volume Number	14
Issue Number	3
e-ISSN	16103661
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-04-05
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Boron Magnetic nanopowder Selective removal Polyvinyl alcohol Glycidol Solvothermal method Environmental Chemistry Ecotoxicology Pollution Analytical Chemistry Geochemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry

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