Synergistic effects of Co-pyrolysis on the immobilization and transformation of lead (Pb), chromium (Cr), nickel (Ni), and fluorine (F) in phosphogypsum-biomass mixtures.

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  • Additional Information
    • Source:
      Publisher: Academic Press Country of Publication: England NLM ID: 0401664 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8630 (Electronic) Linking ISSN: 03014797 NLM ISO Abbreviation: J Environ Manage Subsets: MEDLINE
    • Publication Information:
      Original Publication: London ; New York, Academic Press.
    • Subject Terms:
      Biomass* ; Nickel*/chemistry ; Chromium*/chemistry ; Lead*/chemistry ; Fluorine*/chemistry ; Calcium Sulfate*/chemistry; Phosphorus/chemistry ; Zea mays
    • Abstract:
      Co-pyrolysis of biomass with phosphogypsum (PG) presents an effective strategy for facilitating the recycling of PG resources. However, it is crucial to note the environmental threats arising from the presence of Pb, Cr, Ni, and F in PG. This study investigated the effect of immobilization and transformation of four elements during co-pyrolysis with biomass and its components. The co-pyrolysis experiments were carried out in a tube furnace with a mixture of PG and corn stover (CS), cellulose (C), lignin (L), glucose (G). Co-pyrolysis occurred at varying temperatures (600 °C, 700 °C, 800 °C, and 900 °C) and different addition ratios (10%, 15%, and 20%). The results indicated that an increase in co-pyrolysis temperature was more conducive to the immobilization and transformation of harmful elements in PG, demonstrating significant efficacy in controlling F. Additionally, the addition of biomass components exerts a significant impact on inhibiting product toxicity, with small molecules such as glucose playing a prominent role in this process. The mechanism underlying the control of harmful elements during co-pyrolysis of PG and biomass was characterized by three main aspects. Firstly, biomass components have the potential to melt-encapsulate the harmful elements in PG, leading to precipitation. Secondly, the pyrolysis gas produced during the co-pyrolysis process contributes to the formation of a rich pore structure in the product. Finally, this process aids in transforming hazardous substances into less harmful forms and stabilizing these elements. The findings of this study are instrumental in optimizing the biomass and PG blend to mitigate the environmental impact of their co-pyrolysis products.
      Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:Guangfei Qu reports financial support was provided by Science and Technology Department of Yunnan Province, China. Kunming University of Science and Technology is the undertaking unit of the project. Guangfei Qu reports a relationship with Kunming University of Science and Technology that includes: employment. Guangfei Qu has patent pending to Guangfei Qu. None If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2024 Elsevier Ltd. All rights reserved.)
    • Contributed Indexing:
      Keywords: Biomass; Co-pyrolysis; Hazardous elements; Immobilization and conversion; Phosphogypsum
    • Accession Number:
      7OV03QG267 (Nickel)
      0R0008Q3JB (Chromium)
      2P299V784P (Lead)
      13397-24-5 (phosphogypsum)
      284SYP0193 (Fluorine)
      WAT0DDB505 (Calcium Sulfate)
      27YLU75U4W (Phosphorus)
    • Publication Date:
      Date Created: 20240602 Date Completed: 20240611 Latest Revision: 20240611
    • Publication Date:
      20240612
    • Accession Number:
      10.1016/j.jenvman.2024.121340
    • Accession Number:
      38824889