Adsorption of Phosphonates onto the Goethite-Water Interface.

  title={Adsorption of Phosphonates onto the Goethite-Water Interface.},
  author={Nowack and Peter Stone},
  journal={Journal of colloid and interface science},
  volume={214 1},
The adsorption of one phosphonate, two hydroxyphosphonates, and five aminophosphonates onto the iron (hydr)oxide goethite (alpha-FeOOH) has been studied as a function of pH. At phosphonate concentrations significantly lower than the total number of available surface sites, nearly 100% adsorption is observed below pH 8.0. Adsorption decreases to negligible levels as the pH is increased to 12.0. Under the conditions just described, adsorption of nitrilotris(methylenephosphonic acid) as a function… CONTINUE READING