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Updated: Sep 27, 2025
Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
Enhanced Nutrient Removal in A2N Effluent by Reclaimed Biochar Adsorption
Peng Chen1, Junkang Wu1,2, Yue He3
1Department of Environmental Science and Engineering, School of Energy and Environment, Wuxi Engineering Research Center of Taihu Lake Water Environment, Southeast University, Nanjing 210096, China.
Activated sludge biochar effectively removes phosphorus from wastewater, with temperature enhancing removal and pH influencing nitrogen and phosphorus adsorption differently. This study explores biochar for water purification.
Area of Science:
- Environmental Science
- Water Treatment Engineering
- Materials Science
Background:
- Excessive nitrogen and phosphorus discharge causes water eutrophication and ecosystem disruption.
- Wastewater treatment requires efficient methods for nutrient removal.
Purpose of the Study:
- To investigate the effectiveness of four biowaste-reclaimed biochars for removing nitrogen and phosphorus from anaerobic wastewater.
- To compare the performance of different biochars and analyze the effects of temperature and pH on nutrient removal.
Main Methods:
- Preparation and characterization of four biochars using SEM, FTIR, XRD, and BET methods.
- Investigating nutrient (nitrogen and phosphorus) adsorption from anaerobic wastewater using biochars.
- Analyzing the impact of temperature and pH variations on adsorption efficiency.
Main Results:
- Activated sludge biochar (ASB) showed the highest total phosphorus (TP) removal efficiency.
- Temperature generally enhanced TP and ammonium-nitrogen (NH4+-N) adsorption on ASB.
- Increased pH significantly improved NH4+-N removal but reduced TP removal.
Conclusions:
- ASB is a promising material for TP removal from wastewater.
- TP adsorption by ASB involves chemical precipitation and electrostatic interactions.
- NH4+-N adsorption on ASB is primarily governed by pore diffusion mechanisms.
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