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  1. Home
  3. Research Domains
  5. Environmental Sciences
  7. Soil Sciences
  9. Soil Physics
  11. Biochar Reduces Antibiotic Transport By Altering Soil Hydrology And Enhancing Antibiotic Sorption.
  1. Home
  3. Research Domains
  5. Environmental Sciences
  7. Soil Sciences
  9. Soil Physics
  11. Biochar Reduces Antibiotic Transport By Altering Soil Hydrology And Enhancing Antibiotic Sorption.

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Biochar reduces antibiotic transport by altering soil hydrology and enhancing antibiotic sorption.

Xiang-Yu Tang1, Wen-Min Yin2, Guang Yang3

  • 1State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China; Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610299, China.

Journal of Hazardous Materials
|May 4, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Biochar (BC) effectively reduced antibiotic transport in soil. Surface BC application lowered sulfonamide runoff, while permeable reactive walls reduced florfenicol leaching by altering soil water flow.

Keywords:
AntibioticsBiocharDrainageRunoff

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Area of Science:

  • Environmental Science
  • Soil Science
  • Agricultural Chemistry

Background:

  • Antibiotic transport in soil poses environmental risks.
  • The efficacy of biochar (BC) in mitigating antibiotic movement under field conditions requires further investigation.
  • Weakly sorbing antibiotics like sulfonamides and florfenicol are of particular concern.

Purpose of the Study:

  • To evaluate the effectiveness of different biochar (BC) application methods in reducing antibiotic discharge via runoff and drainage.
  • To assess the impact of BC on soil hydraulic properties and their role in antibiotic transport.
  • To compare the performance of surface-applied BC and BC-amended permeable reactive walls.

Main Methods:

  • Field-based study using repacked sloping soil boxes with calcareous soil.
Transport
  • Monitoring of three antibiotics (sulfadiazine, sulfamethazine, florfenicol) discharge over three natural rain events.
  • Application of 1% BC as surface application (1%BC-SA) and 5% BC in a permeable reactive wall (5%BC-PRW).

    • Main Results:

    • Surface application of 1% BC (1%BC-SA) significantly reduced runoff discharge of sulfonamide antibiotics, attributed to enhanced water infiltration.
    • The 5% BC-PRW treatment was more effective than 1%BC-SA in reducing the leaching of florfenicol.
    • BC-PRW enhanced plant available and drainable water content, crucial for reducing the most weakly sorbing antibiotic's leaching.

    Conclusions:

    • Biochar application significantly influences soil hydraulic properties, thereby regulating water flow patterns.
    • Both surface-applied BC and BC-amended permeable reactive walls show potential for reducing antibiotic transport in soil.
    • Modifying soil hydraulic properties with biochar is a key mechanism for mitigating offsite and groundwater contamination by antibiotics.