Adsorption and desorption of ammonium by maple wood biochar as a function of oxidation and pH.

@article{Wang2015AdsorptionAD,
  title={Adsorption and desorption of ammonium by maple wood biochar as a function of oxidation and pH.},
  author={Bing Wang and Johannes Lehmann and Kelly L. Hanley and Rachel Hestrin and Akio Enders},
  journal={Chemosphere},
  year={2015},
  volume={138},
  pages={120-6}
}
The objective of this work was to investigate the retention mechanisms of ammonium in aqueous solution by using progressively oxidized maple wood biochar at different pH values. Hydrogen peroxide was used to oxidize the biochar to pH values ranging from 8.1 to 3.7, with one set being adjusted to a pH of 7 afterwards. Oxidizing the biochars at their lowered pH did not increase their ability to adsorb ammonium. However, neutralizing the oxygen-containing surface functional groups on oxidized… CONTINUE READING