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Updated: Nov 3, 2025
Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
P-enriched hydrochar for soil remediation: Synthesis, characterization, and lead stabilization
Feiyue Li1, Andrew R Zimmerman2, Yulin Zheng3
1College of Resources and Environment Science, Anhui Science and Technology University, Fengyang 233100, China; Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, USA.
This study created a novel phosphorus-enriched hydrochar from biomass waste for environmental cleanup. The new material efficiently stabilized lead (Pb) in contaminated soils, offering a sustainable solution for heavy metal remediation.
Area of Science:
- Materials Science
- Environmental Science
- Green Chemistry
Background:
- Environmental remediation using biomass-derived materials is a key research area.
- Lead (Pb) contamination in soil poses significant environmental and health risks.
- Developing cost-effective and sustainable methods for heavy metal stabilization is crucial.
Purpose of the Study:
- To synthesize a novel phosphorus-enriched hydrochar from biomass waste.
- To investigate the properties of the P-enriched hydrochar.
- To evaluate the efficacy of P-enriched hydrochar in stabilizing lead (Pb) in contaminated soils.
Main Methods:
- Co-hydrothermal carbonization of biomass (bamboo or hickory) with concentrated phosphoric acid (H3PO4) at 200 °C.
- Characterization of the synthesized P-enriched hydrochar.
- Leaching tests of Pb in simulated and real Pb-contaminated soils amended with pristine and P-enriched hydrochar.
Main Results:
- P-enriched hydrochar exhibited higher yield, phosphorus content (>20%), aromaticity, thermal stability, and surface functionality compared to pristine hydrochar.
- P-enriched hydrochar significantly reduced Pb leaching in simulated soil by ~60% (1 week) and ~90% (3 weeks).
- In real contaminated soil, P-enriched hydrochar achieved 100% Pb leaching reduction within 1 week, meeting U.S.-EPA standards.
Conclusions:
- One-step co-hydrothermal carbonization is an effective method for producing P-enriched hydrochar from biomass waste.
- P-enriched hydrochar demonstrates rapid and efficient stabilization of Pb in contaminated soils.
- This sustainable material holds great potential for environmental remediation of cationic metals.
