Adsorption of humic substances on goethite: comparison between humic acids and fulvic acids.

@article{Weng2006AdsorptionOH,
  title={Adsorption of humic substances on goethite: comparison between humic acids and fulvic acids.},
  author={Liping Weng and Willem H. van Riemsdijk and Luuk K. Koopal and Tjisse Hiemstra},
  journal={Environmental science & technology},
  year={2006},
  volume={40 24},
  pages={7494-500}
}
The adsorption of humic acids (HA) to goethite (at pH 3-11) and the proton co-adsorption (at pH 4.0, 5.5, and 7.0) were measured, and the results were compared to those of fulvic acids (FA). Compared to FA, the adsorption of HA is stronger and more ionic strength dependent. The adsorption of both HA and FA decreases with increasing pH. The relative change of the adsorption with pH is bigger for HA than for FA at relatively low pH. At relatively high pH, it is the opposite. Protons are released… CONTINUE READING

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