Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Potentiometric titrations of chemically immobilised humic acid and salicylic acid and their uptake of Eu(III) as a function of pH and ionic strength
AbstractPotentiometric titrations of chemically immobilised humic acid (CBHA) and salicylic acid (CBSA), have been performed for comparison with titrations of silica gel which is the material upon which the acids were immobilized. The results for the CBHA show a sensitivity to ionic strength effects while results for the CBSA and silica gel showed an insensitivity to changes in ionic strength. The chemically immobilized materials lost some organic carbon while in solution and whereas the amount of dissolved organic carbon (DOC) was constant with respect to pH changes for the CBHA, a pH dependence was observed for the DOC in the case of CBSA. Eu(III) uptake is highly enhanced (relative to uptake by silica gel) in the case of CBSA, especially at low pH values (5), and slightly enhanced after pH of 7. In the case of CBHA, there is a slight enhancement of Eu(III) uptake both at pH values below and after pH of 7. For all solids, this uptake was insensitive to ionic strength changes.
Potentiometric titrations of chemically immobilised humic acid and salicylic acid and their uptake of Eu(III) as a function of pH and ionic strength
AbstractPotentiometric titrations of chemically immobilised humic acid (CBHA) and salicylic acid (CBSA), have been performed for comparison with titrations of silica gel which is the material upon which the acids were immobilized. The results for the CBHA show a sensitivity to ionic strength effects while results for the CBSA and silica gel showed an insensitivity to changes in ionic strength. The chemically immobilized materials lost some organic carbon while in solution and whereas the amount of dissolved organic carbon (DOC) was constant with respect to pH changes for the CBHA, a pH dependence was observed for the DOC in the case of CBSA. Eu(III) uptake is highly enhanced (relative to uptake by silica gel) in the case of CBSA, especially at low pH values (5), and slightly enhanced after pH of 7. In the case of CBHA, there is a slight enhancement of Eu(III) uptake both at pH values below and after pH of 7. For all solids, this uptake was insensitive to ionic strength changes.
Potentiometric titrations of chemically immobilised humic acid and salicylic acid and their uptake of Eu(III) as a function of pH and ionic strength
Ephraim, James H. (Autor:in) / Szabo, Gyula (Autor:in) / Bulman, Robert A. (Autor:in)
Environmental International ; 20 ; 121-125
30.11.1993
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Toxicity identification of chlorinated humic acid at various pH and ionic strength
| British Library Conference Proceedings | 1999
Potentiometric tungsten electrodes with enzymes immobilised by the sol-gel technique
| British Library Online Contents | 2003