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Updated: Apr 4, 2026
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Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
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[Ammonium Adsorption Characteristics in Aqueous Solution by Dairy Manure Biochar]
Huan Jing Ke Xue= Huanjing Kexue
|August 29, 2015
Summary
Dairy manure biochar effectively adsorbs ammonium from water. Adsorption is optimal at pH 5-8, follows pseudo-second-order kinetics, and is a spontaneous, endothermic process.
Area of Science:
- Environmental Science
- Environmental Chemistry
- Materials Science
Background:
- Ammonium contamination in water is a significant environmental concern.
- Biochar derived from dairy manure offers a sustainable adsorbent material.
Purpose of the Study:
- To investigate ammonium adsorption by dairy manure biochar.
- To determine the influence of pH, particle size, dosage, temperature, and competing cations.
- To elucidate the adsorption kinetics, isotherms, and thermodynamics.
Main Methods:
- Batch adsorption experiments were conducted.
- Varying solution pH, particle size, adsorbent dosage, and temperature.
- Investigated the effect of competitive cations (Na+, Ca2+).
- Analyzed kinetic, isotherm, and thermodynamic data using established models.
Main Results:
- Optimal ammonium adsorption occurred at pH 5-8.
- Adsorption followed pseudo-second-order kinetics and the Freundlich isotherm model.
- Na+ and Ca2+ ions competed with ammonium adsorption, with Na+ showing higher preference.
- The adsorption process was found to be spontaneous and endothermic.
Conclusions:
- Dairy manure biochar is a promising adsorbent for ammonium removal from aqueous solutions.
- Understanding the influencing factors and mechanisms is crucial for effective water treatment applications.
- The study provides valuable insights into the application of biochar for nutrient management in water.
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