The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We studied the binding of Pb(II), Cd(II), and Cu(II) to humic acid and fulvic acid extracted from an ombrotrophic peat bog, by metal titration experiments at pH 5.5 and 6.0, and 0.1 M KNO 3 ionic strength. Free metal ion concentrations in solution were measured using ion selective electrodes. The amounts of base required to maintain constant pH conditions were used to calculate H + ...
Peat humic and fulvic acids were isolated from a surface horizon (0–60 cm) and deeper horizon (>60 cm) of an ombrotrophic peat bog located in Galicia (NW Spain) and which constitutes a record of paleoenvironmental contamination. The humic and fulvic acids were characterized and compared using chemical methods and spectroscopic techniques, including ultraviolet visible (UV-vis), Fourier transform...
The binding of Cu 2+ and Ca 2+ to a fulvic acid (FA), simulating naturally occurring conditions, was studied. Furthermore, copper-FA complexation in the presence and absence of calcium was compared. For this, potentiometric titrations were carried out using a solution of FA at a concentration of 100mgL -1 , and of ionic strength 0.1M. The Ca 2+ -FA...
Potentiometric titrations of two soil extracted fulvic acids (FA) were carried out at various FA concentrations (25mgl -1 <[FA]<90mgl -1 ) and ionic strengths (0.005M<[KNO 3 ]<1.0M). Experimental data have been analyzed by means of the master curve approach which includes an electrostatic spherical double layer model, and Langmuir-Freundlich isotherm was...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.