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Upcycling Coal Gangue with Goethite for Synergistic and Enhanced Removal of Ciprofloxacin.

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Title: Upcycling Coal Gangue with Goethite for Synergistic and Enhanced Removal of Ciprofloxacin.
Authors: Xiong, Danling1,2 (AUTHOR), Dong, Xiang1,2 (AUTHOR) 14453718@qq.com, Zhang, Huali1,2 (AUTHOR), Han, Tingting1,2 (AUTHOR), Zhang, Lan1,2 (AUTHOR), Qiao, Yuwen1,2 (AUTHOR), Cen, Qihong3 (AUTHOR)
Source: Water, Air & Soil Pollution. Jul2026, Vol. 237 Issue 14, p1-22. 22p.
Subject Terms: *Goethite, *Ciprofloxacin, *Water pollution remediation, *Waste recycling, *Mine waste, *Circular economy, *Chemical stability, *Adsorption (Chemistry)
Abstract: The pervasive contamination of water by antibiotics, particularly ciprofloxacin (CIP), demands efficient and low-cost remediation technologies. Guided by a novel "waste-treats-waste" strategy, this study successfully transformed coal gangue (CG), a solid waste, into a high-performance adsorbent by in-situ hydrothermal loading of goethite (α-FeOOH). The synthesized 100CG/FeOOH40 composite was thoroughly characterized (SEM, XRD, FTIR), confirming successful loading of α-FeOOH and the formation of a composite structure with abundant surface functional groups. Remarkably, batch adsorption experiments demonstrated a synergistic enhancement: the composite achieved a CIP adsorption capacity of 31.50 mg/g, significantly surpassing that of raw CG (13.38 mg/g) and pure α-FeOOH (7.71 mg/g). The adsorption process, best described by the pseudo-second-order kinetic and Freundlich isotherm models, was identified as chemisorption-driven and multilayer. Optimal removal occurred at neutral pH. Mechanistic studies revealed a multi-mechanism action involving surface complexation, π-π interactions, ion exchange, pore filling, and electrostatic interactions. Moreover, the composite exhibited excellent environmental stability, with negligible iron leaching across different pH and temperature conditions, and maintained high efficiency over multiple regeneration cycles. This work presents a dual-value solution: it pioneers a high-value utilization pathway for CG and provides a cost-effective, stable, and efficient adsorbent for mitigating emerging aquatic contaminants, embodying a sustainable circular economy approach. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 194357562
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Label: Title
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  Data: Upcycling Coal Gangue with Goethite for Synergistic and Enhanced Removal of Ciprofloxacin.
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  Data: <searchLink fieldCode="AR" term="%22Xiong%2C+Danling%22">Xiong, Danling</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dong%2C+Xiang%22">Dong, Xiang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> 14453718@qq.com</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Huali%22">Zhang, Huali</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Han%2C+Tingting%22">Han, Tingting</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Lan%22">Zhang, Lan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qiao%2C+Yuwen%22">Qiao, Yuwen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cen%2C+Qihong%22">Cen, Qihong</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Water%2C+Air+%26+Soil+Pollution%22">Water, Air & Soil Pollution</searchLink>. Jul2026, Vol. 237 Issue 14, p1-22. 22p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Goethite%22">Goethite</searchLink><br />*<searchLink fieldCode="DE" term="%22Ciprofloxacin%22">Ciprofloxacin</searchLink><br />*<searchLink fieldCode="DE" term="%22Water+pollution+remediation%22">Water pollution remediation</searchLink><br />*<searchLink fieldCode="DE" term="%22Waste+recycling%22">Waste recycling</searchLink><br />*<searchLink fieldCode="DE" term="%22Mine+waste%22">Mine waste</searchLink><br />*<searchLink fieldCode="DE" term="%22Circular+economy%22">Circular economy</searchLink><br />*<searchLink fieldCode="DE" term="%22Chemical+stability%22">Chemical stability</searchLink><br />*<searchLink fieldCode="DE" term="%22Adsorption+%28Chemistry%29%22">Adsorption (Chemistry)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The pervasive contamination of water by antibiotics, particularly ciprofloxacin (CIP), demands efficient and low-cost remediation technologies. Guided by a novel "waste-treats-waste" strategy, this study successfully transformed coal gangue (CG), a solid waste, into a high-performance adsorbent by in-situ hydrothermal loading of goethite (α-FeOOH). The synthesized 100CG/FeOOH40 composite was thoroughly characterized (SEM, XRD, FTIR), confirming successful loading of α-FeOOH and the formation of a composite structure with abundant surface functional groups. Remarkably, batch adsorption experiments demonstrated a synergistic enhancement: the composite achieved a CIP adsorption capacity of 31.50 mg/g, significantly surpassing that of raw CG (13.38 mg/g) and pure α-FeOOH (7.71 mg/g). The adsorption process, best described by the pseudo-second-order kinetic and Freundlich isotherm models, was identified as chemisorption-driven and multilayer. Optimal removal occurred at neutral pH. Mechanistic studies revealed a multi-mechanism action involving surface complexation, π-π interactions, ion exchange, pore filling, and electrostatic interactions. Moreover, the composite exhibited excellent environmental stability, with negligible iron leaching across different pH and temperature conditions, and maintained high efficiency over multiple regeneration cycles. This work presents a dual-value solution: it pioneers a high-value utilization pathway for CG and provides a cost-effective, stable, and efficient adsorbent for mitigating emerging aquatic contaminants, embodying a sustainable circular economy approach. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=194357562
RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1007/s11270-026-09531-z
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 22
        StartPage: 1
    Subjects:
      – SubjectFull: Goethite
        Type: general
      – SubjectFull: Ciprofloxacin
        Type: general
      – SubjectFull: Water pollution remediation
        Type: general
      – SubjectFull: Waste recycling
        Type: general
      – SubjectFull: Mine waste
        Type: general
      – SubjectFull: Circular economy
        Type: general
      – SubjectFull: Chemical stability
        Type: general
      – SubjectFull: Adsorption (Chemistry)
        Type: general
    Titles:
      – TitleFull: Upcycling Coal Gangue with Goethite for Synergistic and Enhanced Removal of Ciprofloxacin.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Xiong, Danling
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          Name:
            NameFull: Dong, Xiang
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            NameFull: Zhang, Huali
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            NameFull: Han, Tingting
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            NameFull: Zhang, Lan
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            NameFull: Qiao, Yuwen
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            NameFull: Cen, Qihong
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            – D: 15
              M: 07
              Text: Jul2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 00496979
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              Value: 237
            – Type: issue
              Value: 14
          Titles:
            – TitleFull: Water, Air & Soil Pollution
              Type: main
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