Analysis of Copper Binding in the Ternary System Cu2+/Humic Acid/Goethite at Neutral to Acidic pH

摘要: Binding of heavy metal and actinide ions to natural colloids, such as humic substances (HSs) (hydr)oxides, plays an important role in the ecotoxicological behavior these ions. Several thermodynamic models have been constructed predict speciation metal/HS or metal/oxide binary systems. However, environments adsorption HSs on oxides can influence binding target metals, leading deviation from additivity calibrated models. In this study copper (Cu2+) purified Aldrich acid (PAHA)/goethite complex neutral acidic pH region was investigated by measuring Cu2+ isotherms. The measured isotherms were compared with results obtained for systems under similar conditions. comparison revealed that ternary system is enhanced respect sum corresponding From analysis charging adsorbed PAHA as...