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Related Experiment Video

Updated: May 21, 2025

Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites

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Published on: November 28, 2014

Advanced oxidation using modified enteromorpha algae-derived biochar for marine sediment dehydration.

Lun Tan¹, Jian Zhang¹, Jiaoyang Du²

¹National Marine Data and Information Service, Tianjin, China.

Frontiers in Chemistry

|March 18, 2025

Summary

Modified algae biochar effectively dewaters marine sediment by activating persulfate. This advanced oxidation process significantly improves solid yield and dehydration, offering a sustainable solution for sediment remediation.

Keywords:

advanced oxidation process dehydration enteromorpha algae-derived biochar marine sediment persulfate

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Last Updated: May 21, 2025

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Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

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Published on: October 15, 2015

Area of Science:

Environmental Science
Materials Science
Chemical Engineering

Background:

Marine sediment dewatering is challenging due to high water content, chloride levels, and volume.
Traditional methods are often inefficient and environmentally taxing.
Developing sustainable and effective dewatering solutions is crucial for environmental remediation.

Purpose of the Study:

To enhance marine sediment dewatering using modified algae-derived biochar and persulfate advanced oxidation.
To investigate the mechanism behind improved dewatering performance.
To provide a sustainable treatment strategy for marine sediment and algal biomass utilization.

Main Methods:

Preparation of Enteromorpha algae-derived biochar via pyrolysis.
Modification of biochar with FeSO4 solution.
Application of modified biochar and persulfate for sediment dewatering.
Analysis of extracellular polymeric substances (EPS), zeta potential, and microstructure.

Main Results:

Optimal conditions: 4% modified biochar and 1% persulfate.
Specific resistance to filtration (SRF) decreased by 73.4%.
Net solid yield (Yn) increased by 105%, and dehydration amount increased by 118%.

Conclusions:

Modified algae biochar combined with persulfate significantly improves marine sediment dewatering.
Fe2+ and persulfate-activated radicals (·OH, SO4-·) degrade EPS and compress the electric double layer, enhancing dewatering.
This approach offers a sustainable strategy for marine sediment treatment and algal biomass valorization.