Understanding surface complexation of antimony on Mg(OH)2: Insights from first-principles molecular dynamics

Ma, Haonan; Zhang, Chi; Chen, Long; Xi, Mengning; Wang, Zhiqiang; Ni, Zheng; Zhu, Kaigui; Jia, Hanzhong

doi:10.1016/j.cej.2023.141441

Cited by 4 publications

(2 citation statements)

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“…13 Adsorption is cost-effective and highly efficient, but it merely transfers Sb(III) from the polluted water to the adsorbent surface. 14 To overcome these constraints, a potential solution to address these limitations is to convert the toxic trivalent state into a zerovalent state. 7,15 Electroreduction emerges as an attractive approach for Sb recovery, given its rapidness, chemical-free inherence, and ease of operation.…”

Section: Introductionmentioning

confidence: 99%

“…Bio-oxidation offers a more environmentally friendly alternative with less residual sludge; however, the selection and cultivation of specific microorganisms for large-scale applications require further exploration . Adsorption is cost-effective and highly efficient, but it merely transfers Sb(III) from the polluted water to the adsorbent surface . To overcome these constraints, a potential solution to address these limitations is to convert the toxic trivalent state into a zerovalent state. , Electroreduction emerges as an attractive approach for Sb recovery, given its rapidness, chemical-free inherence, and ease of operation. , Yang et al demonstrated the effective recovery of metallic antimony (Sb 0 ) from Sb(III)-containing wastewater using an unmodified carbon cloth (CC) electrode .…”

Section: Introductionmentioning

confidence: 99%

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Electrodeposited Palladium Nanoparticles Enhancing Atomic Hydrogen-Mediated Electrochemical Recovery of Antimony

Wei,

Qiu,

Wang

et al. 2024

ACS EST Eng.

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Electro-generated atomic hydrogen (H*) emerges as a potent species for water contaminant remediation, yet its short life span and confinement to the electrode−solution interface have restricted its broader application. Herein, we investigated the efficacy of palladium nanoparticles loaded onto a carbon cloth (hereafter the Pd/CC) electrode in stabilizing surface atomic H* and enhancing its electroreduction performance against toxic antimonite Sb(III). In comparison to the CC electrode, the Pd/CC electrode exhibited a 0.4 V increase in the onset potential of H + electroreduction and a 5.5-fold improvement in electrochemically active surface area. Additionally, the Sb(III) removal rate constant and metallic antimony (Sb 0 ) formation on the Pd/CC electrode surface were increased by 2.2-and 5.1-fold, respectively. Quenching experiments showed a 20% reduction ratio of atomic H* to Sb(III) at −1.0 V vs Ag/AgCl. Moreover, in situ trapping combined with semiquantification via electron spin resonance indicated that ca. 89% of atomic H* participated in Sb(III) reduction. The exposed crystal surface of Pd nanoparticles increased the electron transport capacity and atomic H* coverage on the electrode surface, which provided a large number of reduction sites for the direct and indirect reductions of Sb(III). Furthermore, accumulated reduction products were easily recovered in dilute H 2 SO 4 , rendering the electrode reusable. This work offers a practical and innovative solution for remediating heavy-metalpolluted wastewater and simultaneously recovering metal resources.

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