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Nanoconfinement-enhanced lanthanum-biochar composites for simultaneous adsorption and catalytic hydrolysis of organic phosphorus pollutants.

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Title: Nanoconfinement-enhanced lanthanum-biochar composites for simultaneous adsorption and catalytic hydrolysis of organic phosphorus pollutants.
Authors: Xu, Shiyun1 (AUTHOR), Yan, Xing1 (AUTHOR), Wei, Yuchen1 (AUTHOR), Zhang, Yanyang1,2 (AUTHOR) zhangyanyang@nju.edu.cn, Fu, Wanyi1,2 (AUTHOR), Yang, Zhichao1,2 (AUTHOR), Shan, Chao1,2 (AUTHOR), Pan, Bingcai1,2 (AUTHOR)
Source: Water Research. Dec2025:Part B, Vol. 287, pN.PAG-N.PAG. 1p.
Subjects: Catalytic hydrolysis, Organophosphorus compounds, Composite materials, Physisorption, Nanoparticles, Microencapsulation, Eutrophication, Wastewater treatment
Abstract: • La@C enhances NTMP adsorption 85-fold and p -NPP hydrolysis 4.7-fold compared to bulk La(OH)₃. • La@C exhibits wide pH (4–10) applicability with strong anti-interference. • Nanoconfinement in La@C enhances La reactivity and alters P binding mechanisms. • Fixed-bed study show divergent spatiotemporal removal dynamics governed by kinetics. The simultaneous removal of organic phosphorus pollutants (e.g., phosphonates and organophosphate esters (OPEs)) in aquatic systems remains a critical challenge due to their persistence and contribution to eutrophication. Herein, we report a lanthanum-loaded biochar composite (La@C) designed to synergize adsorption and catalytic hydrolysis for efficient organic phosphorus remediation. La@C was synthesized via nitric acid pretreatment of bamboo-derived biochar followed by immobilization of La(OH) 3 nanoparticles under nanoconfinement, achieving uniform dispersion (average size 71 nm) with enhanced reactivity. Batch experiments demonstrated the superior performance of La@C: it exhibited an adsorption capacity of 67.7 μmol/g La for nitrilotris (methylphosphonic acid) (NTMP) and a hydrolysis efficiency of 87.7 % for para-nitrophenyl phosphate (p -NPP), outperforming bulk La(OH)₃ by 54.6 % in capacity (with 85-fold faster kinetics) and 57.7 % in hydrolysis efficiency (with a 4.7-fold higher rate constant), respectively. The composite exhibited wide pH applicability (pH 4–10) and strong resistance to humic acid (20 mg TOC/L) due to nanoconfinement-induced size exclusion and electrostatic shielding. Fixed-bed column experiments revealed spatiotemporal removal dynamics governed by adsorption affinity (orthophosphate> NTMP> p -NPP) and divergent mass transfer zones (MTZ), showcasing a shorter MTZ for orthophosphate and NTMP (0.97 cm) compared to the significantly longer MTZ for p -NPP (280 cm) removal. Mechanistic studies using XPS, solid-state ³¹P NMR, and EXAFS substantiated monodentate inner-sphere complexation for NTMP adsorption and an adsorption-hydrolysis pathway for p -NPP removal. The nanoconfinement effects stabilized the loaded La(OH) 3 nanoparticles, enhanced coordination strength and catalytic activity, offering a scalable strategy for organic phosphorus remediation in complex wastewater matrices. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Water Research is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Label: Title
  Group: Ti
  Data: Nanoconfinement-enhanced lanthanum-biochar composites for simultaneous adsorption and catalytic hydrolysis of organic phosphorus pollutants.
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  Data: <searchLink fieldCode="AR" term="%22Xu%2C+Shiyun%22">Xu, Shiyun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Xing%22">Yan, Xing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Yuchen%22">Wei, Yuchen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yanyang%22">Zhang, Yanyang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> zhangyanyang@nju.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Fu%2C+Wanyi%22">Fu, Wanyi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Zhichao%22">Yang, Zhichao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shan%2C+Chao%22">Shan, Chao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pan%2C+Bingcai%22">Pan, Bingcai</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Water+Research%22">Water Research</searchLink>. Dec2025:Part B, Vol. 287, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Catalytic+hydrolysis%22">Catalytic hydrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Organophosphorus+compounds%22">Organophosphorus compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+materials%22">Composite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Physisorption%22">Physisorption</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoparticles%22">Nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Microencapsulation%22">Microencapsulation</searchLink><br /><searchLink fieldCode="DE" term="%22Eutrophication%22">Eutrophication</searchLink><br /><searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • La@C enhances NTMP adsorption 85-fold and p -NPP hydrolysis 4.7-fold compared to bulk La(OH)₃. • La@C exhibits wide pH (4–10) applicability with strong anti-interference. • Nanoconfinement in La@C enhances La reactivity and alters P binding mechanisms. • Fixed-bed study show divergent spatiotemporal removal dynamics governed by kinetics. The simultaneous removal of organic phosphorus pollutants (e.g., phosphonates and organophosphate esters (OPEs)) in aquatic systems remains a critical challenge due to their persistence and contribution to eutrophication. Herein, we report a lanthanum-loaded biochar composite (La@C) designed to synergize adsorption and catalytic hydrolysis for efficient organic phosphorus remediation. La@C was synthesized via nitric acid pretreatment of bamboo-derived biochar followed by immobilization of La(OH) 3 nanoparticles under nanoconfinement, achieving uniform dispersion (average size 71 nm) with enhanced reactivity. Batch experiments demonstrated the superior performance of La@C: it exhibited an adsorption capacity of 67.7 μmol/g La for nitrilotris (methylphosphonic acid) (NTMP) and a hydrolysis efficiency of 87.7 % for para-nitrophenyl phosphate (p -NPP), outperforming bulk La(OH)₃ by 54.6 % in capacity (with 85-fold faster kinetics) and 57.7 % in hydrolysis efficiency (with a 4.7-fold higher rate constant), respectively. The composite exhibited wide pH applicability (pH 4–10) and strong resistance to humic acid (20 mg TOC/L) due to nanoconfinement-induced size exclusion and electrostatic shielding. Fixed-bed column experiments revealed spatiotemporal removal dynamics governed by adsorption affinity (orthophosphate> NTMP> p -NPP) and divergent mass transfer zones (MTZ), showcasing a shorter MTZ for orthophosphate and NTMP (0.97 cm) compared to the significantly longer MTZ for p -NPP (280 cm) removal. Mechanistic studies using XPS, solid-state ³¹P NMR, and EXAFS substantiated monodentate inner-sphere complexation for NTMP adsorption and an adsorption-hydrolysis pathway for p -NPP removal. The nanoconfinement effects stabilized the loaded La(OH) 3 nanoparticles, enhanced coordination strength and catalytic activity, offering a scalable strategy for organic phosphorus remediation in complex wastewater matrices. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Water Research is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.watres.2025.124445
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Catalytic hydrolysis
        Type: general
      – SubjectFull: Organophosphorus compounds
        Type: general
      – SubjectFull: Composite materials
        Type: general
      – SubjectFull: Physisorption
        Type: general
      – SubjectFull: Nanoparticles
        Type: general
      – SubjectFull: Microencapsulation
        Type: general
      – SubjectFull: Eutrophication
        Type: general
      – SubjectFull: Wastewater treatment
        Type: general
    Titles:
      – TitleFull: Nanoconfinement-enhanced lanthanum-biochar composites for simultaneous adsorption and catalytic hydrolysis of organic phosphorus pollutants.
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            NameFull: Xu, Shiyun
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            NameFull: Yan, Xing
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            NameFull: Wei, Yuchen
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              M: 12
              Text: Dec2025:Part B
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              Y: 2025
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