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We studied the binding of Cu(II) to humic acids and fulvic acids extracted from two horizons of an ombrotrophic peat bog by metal titration experiments at pH 4.5, 5.0, 5.5, and 6.0 and 0.1M KNO 3 ionic strength. Free metal ion concentrations in solution were measured using an ion selective electrode. The amounts of base required to maintain constant pH conditions were recorded and used to...
Potentiometric titrations of a sample of soil extracted fulvic acid (FA) were carried out using different concentrations (20 mg l -1 <[FA]<80 mg l -1 ) and ionic strengths (0.005 M<[KNO 3 ]<1.0 M). Experimental data were analysed by means of the master curve approach, which includes an electrostatic spherical double layer model, and a Langmuir-Freundlich...
The acidbase properties of two fulvic acids (FA) extracted from senescent leaves of eucalyptus and oak were characterized by carrying out potentiometric titrations at two FA concentrations and four ionic strengths (0.005M[KNO3]1.0M). Experimental data were analyzed by means of the master curve approach, which includes an electrostatic spherical double layer model, and the LangmuirFreundlich isotherm...
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