Sorption properties of boron on Mg–Al bimetallic oxides calcined at different temperatures

Moriyama, Sayo; Sasaki, Keiko; Hirajima, Tsuyoshi; Ideta, Keiko; Miyawaki, Jin

doi:10.1016/j.seppur.2015.08.023

Cited by 5 publications

(1 citation statement)

References 40 publications

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“…Among many proposed methods − for boron removal, adsorption is one of the most promising methods as a result of the low cost, effective boron uptake, and easy regeneration. So far, many kinds of sorbents for boron removal from aqueous solution have been studied including chelating resins − and fibers, activated carbon, , fly ash and industrial waste materials, − natural materials, oxides and hydroxides, , layered double hydroxides, − and new types of inorganic sorbents. ,, Among them, Amberlite IRA-743 is one of the most widely used commercial boron adsorbents, produced by Rohm & Haas Corporation, with a capacity of about 0.9251 mmol·g –1 . Boron adsorption capacity is a critical index for evaluating the performance of adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Framework UiO-66 as an Efficient Adsorbent for Boron Removal from Aqueous Solution

Lyu

Liu

Zeng

et al. 2017

Ind. Eng. Chem. Res.

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Water-stable metal−organic framework (MOF) UiO-66 was studied in boron removal from water for the first time. XRD, SEM, nitrogen adsorption/desorption isotherms, and thermogravimetric analysis (TG) were employed to confirm the structure. The boron adsorption kinetics, isotherms, thermodynamics, mechanism, and recycling on UiO-66 were further investigated in batch adsorption process. UiO-66 exhibits great adsorption performance of 10.59 mmol• g −1 at 45 °C, and the adsorption process reaches equilibrium rapidly in 1 h. Pseudo-second-order model, intraparticle diffusion, and Boyd model are employed for kinetic analysis. The process is a spontaneous endothermic process controlled by entropy change rather than enthalpy change, which suggests intensive chemisorption. The adsorption capacity does not decrease obviously after four cycles. Characterization on exhausted UiO-66 with 11 B MAS NMR reveals not solely interaction between boric acid and UiO-66. The XPS patterns suggest interaction with an Zr site, which is confirmed by the adsorption simulation with quantum chemistry. Higher boron adsorption capacity than conventional boron removal adsorbents and easy regeneration make UiO-66 a promising agent for boron removal from aqueous solution.

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