Selective capacitive removal of Pb2+ ion contaminants from drinking water via nickel foam/Mn2CoO4@tannic acid-Fe3+ electrodes

Tang, Changbin; Yu, Yongqi; Shi, Yuzhu; Li, Yanrong; Zhang, Yujie; Xue, Juan

doi:10.1039/d3cp01054f

Cited by 4 publications

(2 citation statements)

References 47 publications

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“…This is because of the finite adsorption capacity of poly-tannic acid, which represents the maximum amount of Pb(II) ions that can interact with it. Once all available sites were occupied, additional Pb(II) ions in the solution could not be removed, leading to a plateau in removal efficiency. , …”

Section: Resultsmentioning

confidence: 99%

“…Once all available sites were occupied, additional Pb(II) ions in the solution could not be removed, leading to a plateau in removal efficiency. 65,66 The comparison of the maximum adsorption capacity (Q m ) of this biohybrid material with other alternative adsorbents relevant for the removal of Pb(II) ions in water samples at the same conditions is listed in Table 1.…”

Section: Acs Sustainablementioning

confidence: 99%

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Biosynthesis of a Functional Silica-Based Biohybrid Material with High Pb(II) Capture Ability

Maulidin,

Nakashima,

Naota

et al. 2024

ACS Sustainable Resour. Manage.

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Lead contamination of water sources poses a serious risk to ecosystems and human health. We developed a silica-based biosorbent incorporating poly-tannic acid to efficiently remove Pb(II) ions from water. The laccase was immobilized on silica bead surfaces via an enzymatic process facilitated by a protective layer of silicatein. This approach prevents enzyme leaching, ensuring immobilized laccase stability under harsh conditions. Polytannic acid was formed on the bead surface through laccase-mediated polymerization. Successful laccase immobilization was confirmed by scanning electron microscopy, revealing a porous structure on the bead surface. The biosorbent demonstrated high laccase loading and retained 48% of its activity under alkaline conditions. Further confirmation of successful tannic acid polymerization was obtained through SEM-EDS indicated changes in surface composition, and FTIR spectra revealed alterations in functional groups. Practical application of the silicatein-treated biosorbent revealed its effectiveness in removing Pb(II) ions from aqueous solutions, with a maximum adsorption capacity of 52.4 mg/g, a threefold increase compared to a biosorbent without silicatein. The adsorption isotherm for Pb(II) ions fits the Langmuir model, indicating that the silicatein-treated biosorbent optimally fits a monolayer adsorption model. This biohybrid material offers promising advantages over conventional methods, including improved adsorption capacity and stability, making it an environmentally friendly solution for heavy metal water source bioremediation.

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Section: Resultsmentioning

confidence: 99%

Section: Acs Sustainablementioning

confidence: 99%

Biosynthesis of a Functional Silica-Based Biohybrid Material with High Pb(II) Capture Ability

Maulidin,

Nakashima,

Naota

et al. 2024

ACS Sustainable Resour. Manage.

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Selective capacitive removal of Pb(II) ions from industrial wastewater using NF/Mn2CoO4@MoO2 electrodes

Tang,

Li,

et al. 2024

Chemical Engineering Journal

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The effect and mechanism of different pore structure distribution on electrosorption selectivity of anions during capacitive deionization

Deng,

Jing,

Gao

et al. 2024

Desalination and Water Treatment

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Selective capacitive removal of Pb²⁺ ion contaminants from drinking water via nickel foam/Mn₂CoO₄@tannic acid-Fe³⁺ electrodes

Abstract: The health hazards caused by low concentrations of Pb2+ ions in drinking water systems are of significant concern. In order to remove trace Pb2+ ions and retain Na+, K+, Ca2+...

Cited by 4 publications

References 47 publications

Biosynthesis of a Functional Silica-Based Biohybrid Material with High Pb(II) Capture Ability

Biosynthesis of a Functional Silica-Based Biohybrid Material with High Pb(II) Capture Ability

Selective capacitive removal of Pb(II) ions from industrial wastewater using NF/Mn2CoO4@MoO2 electrodes

The effect and mechanism of different pore structure distribution on electrosorption selectivity of anions during capacitive deionization

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