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Macroporous honeycomb-like magnesium oxide fabricated as long-life and outstanding Pb(II) adsorbents combined with mechanism insight.
Environ Sci Pollut Res Int. 2023 Mar; 30(13):38380-38393.ES

Abstract

The macroporous honeycomb-like MgO (MHM) had been successfully prepared by hard template method using polystyrene (PS) spheres with different particle sizes of about 400, 600, and 800 nm, respectively. The adsorption performance (3700, 3470, and 3087 mg/g) and specific surface areas (64.0, 51.4, and 34.4 m2/g) of MHM materials were inversely proportional to their pore diameters. Among the prepared MHM materials, MHM-400 exhibited the most excellent adsorption performance of 3700 mg/g towards Pb(II) at 25 °C. In this study, the macropore size in MHM played a major role in the adsorption process; Dubinin-Radushkevich (D-R) model further indicated that Pb(II) removal by MHM-400 was dominated by chemical adsorption. The thermodynamic analysis (ΔG0 < 0, ΔH0 > 0, and ΔS0 > 0) revealed that the Pb(II) adsorption was spontaneous and endothermic. After storing for 360 days, the Pb(II) removal efficiency of MHM-400 was still higher than 98.2%, exhibiting ultra-long life for Pb(II) capture. MHM-400 also exhibited high anti-interference ability towards typically coexisting ions (Na+ and K+). According to the density functional theory (DFT) calculation, the Pb could be adsorbed on the top site of the oxygen atom at the surface of the cubic MgO (200) plane; the adsorption energy (Ead) was 0.159 eV. The XRD and FTIR analyses revealed the further formation of Pb3(CO3)2(OH)2 and PbO after Pb(II) adsorption. Furthermore, MHM-400 could effectively remove both Cd(II) and Pb(II) ions from wastewater within 20 min, and the adsorption efficiency achieved > 99%, suggesting that MHM-400 was a potential material for effective Pb(II) removal.

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Publisher Full Text (DOI)

Authors+Show Affiliations

He X
Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 1958 Kejia Ave, Ganzhou City, Jiangxi Province, China.
Lu J
Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 1958 Kejia Ave, Ganzhou City, Jiangxi Province, China.
Wei H
Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 1958 Kejia Ave, Ganzhou City, Jiangxi Province, China.
Liu B
Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 1958 Kejia Ave, Ganzhou City, Jiangxi Province, China. Liu_micro@126.com.

MeSH

Magnesium OxideLeadThermodynamicsIonsAdsorptionKineticsWater Pollutants, ChemicalHydrogen-Ion Concentration

Pub Type(s)

Journal Article

Language

eng

PubMed ID

36580249

Citation

He, Xingyu, et al. "Macroporous Honeycomb-like Magnesium Oxide Fabricated as Long-life and Outstanding Pb(II) Adsorbents Combined With Mechanism Insight." Environmental Science and Pollution Research International, vol. 30, no. 13, 2023, pp. 38380-38393.
He X, Lu J, Wei H, et al. Macroporous honeycomb-like magnesium oxide fabricated as long-life and outstanding Pb(II) adsorbents combined with mechanism insight. Environ Sci Pollut Res Int. 2023;30(13):38380-38393.
He, X., Lu, J., Wei, H., & Liu, B. (2023). Macroporous honeycomb-like magnesium oxide fabricated as long-life and outstanding Pb(II) adsorbents combined with mechanism insight. Environmental Science and Pollution Research International, 30(13), 38380-38393. https://doi.org/10.1007/s11356-022-24525-0
He X, et al. Macroporous Honeycomb-like Magnesium Oxide Fabricated as Long-life and Outstanding Pb(II) Adsorbents Combined With Mechanism Insight. Environ Sci Pollut Res Int. 2023;30(13):38380-38393. PubMed PMID: 36580249.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Macroporous honeycomb-like magnesium oxide fabricated as long-life and outstanding Pb(II) adsorbents combined with mechanism insight. AU - He,Xingyu, AU - Lu,Jiarui, AU - Wei,Hong, AU - Liu,Baixiong, Y1 - 2022/12/29/ PY - 2022/08/09/received PY - 2022/11/28/accepted PY - 2023/3/29/medline PY - 2022/12/30/pubmed PY - 2022/12/29/entrez KW - Long-life adsorbent KW - Macroporous honeycomb-like KW - Pb(II) capture KW - Wastewater SP - 38380 EP - 38393 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 30 IS - 13 N2 - The macroporous honeycomb-like MgO (MHM) had been successfully prepared by hard template method using polystyrene (PS) spheres with different particle sizes of about 400, 600, and 800 nm, respectively. The adsorption performance (3700, 3470, and 3087 mg/g) and specific surface areas (64.0, 51.4, and 34.4 m2/g) of MHM materials were inversely proportional to their pore diameters. Among the prepared MHM materials, MHM-400 exhibited the most excellent adsorption performance of 3700 mg/g towards Pb(II) at 25 °C. In this study, the macropore size in MHM played a major role in the adsorption process; Dubinin-Radushkevich (D-R) model further indicated that Pb(II) removal by MHM-400 was dominated by chemical adsorption. The thermodynamic analysis (ΔG0 < 0, ΔH0 > 0, and ΔS0 > 0) revealed that the Pb(II) adsorption was spontaneous and endothermic. After storing for 360 days, the Pb(II) removal efficiency of MHM-400 was still higher than 98.2%, exhibiting ultra-long life for Pb(II) capture. MHM-400 also exhibited high anti-interference ability towards typically coexisting ions (Na+ and K+). According to the density functional theory (DFT) calculation, the Pb could be adsorbed on the top site of the oxygen atom at the surface of the cubic MgO (200) plane; the adsorption energy (Ead) was 0.159 eV. The XRD and FTIR analyses revealed the further formation of Pb3(CO3)2(OH)2 and PbO after Pb(II) adsorption. Furthermore, MHM-400 could effectively remove both Cd(II) and Pb(II) ions from wastewater within 20 min, and the adsorption efficiency achieved > 99%, suggesting that MHM-400 was a potential material for effective Pb(II) removal. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/36580249/Macroporous_honeycomb_like_magnesium_oxide_fabricated_as_long_life_and_outstanding_Pb_II__adsorbents_combined_with_mechanism_insight_ DB - PRIME DP - Unbound Medicine ER -