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Magnetic Mesoporous Calcium Carbonate-Based Nanocomposites for the Removal of Toxic Pb(II) and Cd(II) Ions from Water
Wang, Penglei1; Shen, Tingting2,3; Li, Xinyong1; Tang, Yuanyuan2; Li, Yongjie3
Source PublicationACS Applied Nano Materials

Calcium carbonate (CaCO)-based nanoadsorbents have gained widespread attention due to their superiority in removing toxic heavy metal ions. Considering that the inherent structure of the material determines its performance, it is important to fully understand the effect of different crystals of CaCO on the removal of heavy metals. On the other hand, the difficult separation of nanoadsorbents during in situ remediation may cause the potential risk of secondary pollution by the remaining adsorbents. Herein, the magnetic calcium carbonate adsorbents with nanostructure (MCCR-X, X represent the annealing temperature) were fabricated with a tunable crystal structure of CaCO by adjusting the annealing temperature. Results from batch experiments revealed the crystal structure (CaCO)-dependent adsorption performance of MCCRs toward Pb(II) and Cd(II). MCCR-350 with an aragonite phase showed the outstanding adsorption toward both Pb(II) and Cd(II) with maximum adsorption capacity of 1179 and 821 mg/g, and MCCR-RAW with a vaterite/aragonite phase also has similar adsorption properties. However, MCCR-550 with the calcite phase displayed a superhigh adsorption toward Pb(II) only but very weak adsorption toward Cd(II) with a capacity of 1350 and 30 mg/g in the initial concentration of 300 mg/g. The findings indicated that the efficiently tunable removal of the heavy metal ion Pb(II) or Cd(II) by MCCRs can be realized by regulating the crystal phase of CaCO. X-ray photoelectron spectroscopy technology (XPS) was employed to clarify the possible mechanism of the crystal phase of CaCO-dependent adsorption ability for Pb(II)/Cd(II) removal by MCCRs. This work provides an understanding of the crystal-structure-related adsorption properties of CaCO and also gives guidance for designing a CaCO-based adsorbent for removal/recovery of heavy metal ions.

KeywordAdsorption Cadmium Calcium Carbonate Crystal Structure Lead Nanocomposites
URLView the original
Indexed BySCIE
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000517856800037
Scopus ID2-s2.0-85081562776
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Document TypeJournal article
CollectionFaculty of Science and Technology
Corresponding AuthorLi, Xinyong; Tang, Yuanyuan
Affiliation1.State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
2.School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
3.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, Macao
Recommended Citation
GB/T 7714
Wang, Penglei,Shen, Tingting,Li, Xinyong,et al. Magnetic Mesoporous Calcium Carbonate-Based Nanocomposites for the Removal of Toxic Pb(II) and Cd(II) Ions from Water[J]. ACS Applied Nano Materials,2020,3(2):1272-1281.
APA Wang, Penglei,Shen, Tingting,Li, Xinyong,Tang, Yuanyuan,&Li, Yongjie.(2020).Magnetic Mesoporous Calcium Carbonate-Based Nanocomposites for the Removal of Toxic Pb(II) and Cd(II) Ions from Water.ACS Applied Nano Materials,3(2),1272-1281.
MLA Wang, Penglei,et al."Magnetic Mesoporous Calcium Carbonate-Based Nanocomposites for the Removal of Toxic Pb(II) and Cd(II) Ions from Water".ACS Applied Nano Materials 3.2(2020):1272-1281.
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