IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v13y2021i14p7859-d593993.html
   My bibliography  Save this article

Synthesis of β-Ca 2 P 2 O 7 as an Adsorbent for the Removal of Heavy Metals from Water

Author

Listed:
  • Diana Griesiute

    (Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania)

  • Justina Gaidukevic

    (Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania)

  • Aleksej Zarkov

    (Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania)

  • Aivaras Kareiva

    (Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania)

Abstract

In the present work, beta-calcium pyrophosphate (β-Ca 2 P 2 O 7 ) was investigated as a potential adsorbent for the removal of heavy metal ions from water. Single-phase β-Ca 2 P 2 O 7 powders were synthesized by a simple, scalable and cost-effective wet precipitation method followed by annealing at 800 °C, which was employed for the conversion of as-precipitated brushite (CaHPO 4 ∙2H 2 O) to β-Ca 2 P 2 O 7 . Physicochemical properties of the sorbent were characterized by means of X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR), thermal analysis (TGA/DSC), scanning electron microscopy (SEM) and low temperature adsorption–desorption of nitrogen (BET method). The synthesized powders consisted of porous plate-like particles with micrometer dimensions. Specific surface area calculated by the BET method was found to be 7 m 2 g −1 . For the estimation of sorption properties, the aqueous model solutions containing different metal ions (Al 3+ , Cd 2+ , Co 2+ , Cu 2+ , Fe 2+ , Mn 2+ , Ni 2+ , Pb 2+ , Sn 2+ , Sr 2+ and Zn 2+ ) were used. The adsorption test revealed that β-Ca 2 P 2 O 7 demonstrates the highest adsorption capacity for Pb 2+ and Sn 2+ ions, while the lowest capacity was observed towards Sr 2+ , Ni 2+ and Co 2+ ions. The optimal pH value for the removal of Pb 2+ ions was determined to be 2, which is also related to the low solubility of β-Ca 2 P 2 O 7 at this pH. The adsorption capacity towards Pb 2+ ions was calculated as high as 120 mg g −1 .

Suggested Citation

  • Diana Griesiute & Justina Gaidukevic & Aleksej Zarkov & Aivaras Kareiva, 2021. "Synthesis of β-Ca 2 P 2 O 7 as an Adsorbent for the Removal of Heavy Metals from Water," Sustainability, MDPI, vol. 13(14), pages 1-9, July.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:14:p:7859-:d:593993
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/13/14/7859/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/13/14/7859/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Yasser A. El-Amier & Ashraf Elsayed & Mohamed A. El-Esawi & Ahmed Noureldeen & Hadeer Darwish & Hala Fakhry, 2021. "Optimizing the Biosorption Behavior of Ludwigia stolonifera in the Removal of Lead and Chromium Metal Ions from Synthetic Wastewater," Sustainability, MDPI, vol. 13(11), pages 1-15, June.
    2. Tunzeel Iqbal & Shahid Iqbal & Fozia Batool & Dimitrios Thomas & Malik Muhammad Hassnain Iqbal, 2021. "Utilization of a Newly Developed Nanomaterial Based on Loading of Biochar with Hematite for the Removal of Cadmium Ions from Aqueous Media," Sustainability, MDPI, vol. 13(4), pages 1-21, February.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.

      Corrections

      All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jsusta:v:13:y:2021:i:14:p:7859-:d:593993. See general information about how to correct material in RePEc.

      If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

      If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

      If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

      For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

      Please note that corrections may take a couple of weeks to filter through the various RePEc services.

      IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.