Preprint Article Version 1 This version is not peer-reviewed

Boron Removal Using Li-Al-OH Layered Double Hydroxide Prepared by One-Step Mechanochemical Approach

Version 1 : Received: 19 November 2018 / Approved: 20 November 2018 / Online: 20 November 2018 (04:02:33 CET)

How to cite: Tian, J.; Qu, J.; Wan, L.; Zhang, Q.; Gao, H. Boron Removal Using Li-Al-OH Layered Double Hydroxide Prepared by One-Step Mechanochemical Approach. Preprints 2018, 2018110477 (doi: 10.20944/preprints201811.0477.v1). Tian, J.; Qu, J.; Wan, L.; Zhang, Q.; Gao, H. Boron Removal Using Li-Al-OH Layered Double Hydroxide Prepared by One-Step Mechanochemical Approach. Preprints 2018, 2018110477 (doi: 10.20944/preprints201811.0477.v1).

Abstract

In this study, Li-Al-OH layered double hydroxide (LDH), which was prepared by solvent-free one-step mechanochemical reaction of LiOH and Al(OH)3, was applied to remove boron from aqueous solution. Dry-grinding for 3 h at a rotational speed of 500 rpm, Li/Al molar 1/2 was the optimum condition to prepare highly crystalline of Li-Al LDH phase with no evident impure phases. Two milling products with Li/Al molar ratio at 1/2 and 2/2 were evaluated for boron adsorption. The results confirmed that Li/Al molar ratio 2/2 sample showed high boron adsorption capacity due to the physical adsorption of Li-Al-OH LDH and chemical synergism of phase gel Al(OH)3. The adsorption isotherms, described by the Langmuir model, indicated maximum monolayer boron uptake capacity 45.45 mg/g, implying competitive adsorption capacity of the material in our experiment.

Subject Areas

Li-Al-OH LDH; mechanochemical preparation; boron adsorption; physical and chemical synergism; competitive adsorbent

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