[Adsorption of Cd and Pb on clays and the influence of humic acids].
Adsorption of cadmium and lead on montmorillonite and kaolin, together with the effect of humic substances was studied. It was found that adsorption amount of Cd and Pb increased as pH value of ambient solution increased. Addition of FA reduced Cd sorption on kaolin at each respective pH value while GHA and BHA increased Cd adsorption amount. A sharp increase was found at pH values higher than 6. Whereas, lead sorption on both clays in the presence of FA unexpectedly decreased as pH values increased when pH > 6.
Yu
Guifen
G
Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. yuguifen@hotmail.com
Jiang
Xin
X
Wu
Hongtao
H
Zeng
Yong
Y
Wang
Fang
F
D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D000077215:Clay; D006812:Humic Substances / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry*
D000538:Aluminum Silicates; D006812:Humic Substances; D002104:Cadmium; D007854:Lead; D000077215:Clay