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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
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Removing ammonium from water using modified corncob-biochar.

Thi Mai Vu1, Van Tuyen Trinh2, Dinh Phuong Doan3

  • 1Hanoi University of Natural Resources and Environment, Ministry of Natural Resources and Environment, 44 Phu Dien, Tu Niem, Ha Noi, Viet Nam.

The Science of the Total Environment
|November 29, 2016
PubMed
Summary

This study developed a low-cost modified corncob biochar to remove ammonium from water. The material shows high adsorption capacity, offering a promising solution for water remediation.

Keywords:
AdsorptionAmmoniumBiocharCorncob

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Area of Science:

  • Environmental Science
  • Materials Science
  • Water Treatment

Background:

  • Ammonium pollution in water poses significant environmental and health risks globally.
  • Effective and affordable water remediation technologies are crucial.

Purpose of the Study:

  • To develop and evaluate a low-cost adsorbent from modified corncob biochar for ammonium removal.
  • To investigate the adsorption characteristics and efficiency of the modified biochar.

Main Methods:

  • Modified biochar synthesized from corncob.
  • Characterization using BET, FTIR, and SEM.
  • Ammonium adsorption experiments in synthetic water (10-100 mg/L).
  • Kinetic and isotherm studies (pseudo-second order, Langmuir, Sips models).

Main Results:

  • Adsorption capacity was highly dependent on pH.
  • Adsorption kinetics followed the pseudo-second order model.
  • Langmuir and Sips models effectively described the adsorption behavior.
  • Maximum adsorption capacity reached 22.6 mg NH4+-N/g modified biochar.

Conclusions:

  • Modified corncob biochar is an effective adsorbent for ammonium removal.
  • The material demonstrates significant potential for water remediation applications.
  • Optimized modification involved HNO3 and NaOH treatment.