Superior removal of selenite by periclase during transformation to brucite under high-pH conditions

Fukushi, Keisuke; Miyashita, Shun; Kasama, Takeshi; Takahashi, Yoshio; Morodome, Shoji

doi:10.1016/j.jhazmat.2019.02.107

Cited by 14 publications

(4 citation statements)

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“…Selenium can occur in both organic and inorganic forms (including different oxidation states with different toxicities). Due to their high solubility and bioavailability, the inorganic species, selenite and selenate anions, are the dominant species in natural water (Fukushi et al, 2019). Though both anions could bioaccumulate in organisms, selenate is more difficult to remove due to its more stable structure in aqueous solutions than selenite (Hansen et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Selenium(VI) and copper(II) adsorption using polyethyleneimine-based resins: Effect of glutaraldehyde crosslinking and storage condition

Wang

Xiao

et al. 2020

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Selenium(VI) and copper(II) adsorption using polyethyleneimine-based resins: Effect of glutaraldehyde crosslinking and storage condition

Wang

Xiao

et al. 2020

Journal of Hazardous Materials

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“…The conversion of the face-centered cubic structure of periclase (MgO; magnesia) , to stacked Mg(OH) 2 nanosheets in brucite [Figure ; MgO + H 2 O → Mg(OH) 2 ] is an ideal reaction that can help advance new ideas ,− on mineral growth in molecularly thick water films. This reaction can also be of especial interest for ongoing and future applications of periclase-bearing materials and related metal oxides. − Applications include steel and cement production, remediation engineering, − refractories, flame retardants, antibacterial activity, as well as emerging technologies using metal oxide-bearing wastes for direct atmospheric CO 2 capture …”

Section: Introductionmentioning

confidence: 99%

“…This reaction can also be of especial interest for ongoing and future applications of periclase-bearing materials and related metal oxides. 19 − 22 Applications include steel and cement production, 20 remediation engineering, 23 − 25 refractories, 22 flame retardants, 26 antibacterial activity, 27 as well as emerging technologies using metal oxide-bearing wastes for direct atmospheric CO 2 capture. 28 …”

Section: Introductionmentioning

confidence: 99%

Water Film-Driven Brucite Nanosheet Growth and Stacking

Luong

Boily

2023

Langmuir

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Thin water films that form by the adhesion and condensation of air moisture on minerals can initiate phase transformation reactions with broad implications in nature and technology. We here show important effects of water film coverages on reaction rates and products during the transformation of periclase (MgO) nanocubes to brucite [Mg(OH) 2 ] nanosheets. Using vibrational spectroscopy, we found that the first minutes to hours of Mg(OH) 2 growth followed first-order kinetics, with rates scaling with water loadings. Growth was tightly linked to periclase surface hydration and to the formation of a brucite precursor solid, akin to poorly stacked/ dislocated nanosheets. These nanosheets were the predominant forms of Mg(OH) 2 growth in the 2D-like hydration environments of sub-monolayer water films, which formed below ∼50% relative humidity (RH). From molecular simulations, we infer that reactions may have been facilitated near surface defects where sub-monolayer films preferentially accumulated. In contrast, the 3D-like hydration environment of multilayered water films promoted brucite nanoparticle formation by enhancing Mg(OH) 2 nanosheet growth and stacking rates and yields. From the structural similarity of periclase and brucite to other metal (hydr)oxide minerals, this concept of contrasting nanosheet growth should even be applicable for explaining water film-driven mineralogical transformations on other related nanominerals.

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“…有効確認 (Sasaki et al, 2011;Li et al, 2014;Fukushi et al, 2019) ．Sasaki et al(2011 et al, 2019) ．α-FeOOH 30 g dm −3 pH 6-9 7.8 mg dm −3 Se (VI) 90% 以上除去 (Hayes et al, 1987) 内圏錯体形成吸着知 (Zhang and Sparks, 1990;Favorito et al, 2018) ，green rust 同吸着機構確認 (Onoguchi et al, 2019;Refait et al, 2000 (Izawa et al, 2014;Fukuda et al, 2020;Sasaki et al, 2015) (Morimoto et al, 2011;Das et al, 2002) ，green rust…”

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