Interactions of calcium and fulvic acid at the goethite-water interface

• Published in: Geochimica et cosmochimica acta Vol. 69; no. 2; pp. 325 - 339
• Main Authors: Weng, Li Ping, Koopal, Luuk K., Hiemstra, Tjisse, Meeussen, Johannes C.L., Van Riemsdijk, Willem H.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.01.2005
• Subjects: chemical heterogeneity; heavy-metals; humic substances; metal-ion binding; mineral particles; natural organic-matter; nica-donnan model; proton binding; solid-solution interface; variable charge

Interactions of calcium and fulvic acid (Strichen ) with the surface of goethite were studied with batch and titration experiments. The mutual influence of the interactions on the adsorption of fulvic acid, calcium ions and protons were examined. Adsorption of the fulvic acid to goethite decreased w...