ion exchangeThe use of a single extraction with dilute unbuffered silver-thiourea (AgTU) solution (0.01 M Ag+) for measuring exchangeable cations and the... JL Pleysier,ASR Juo - 《Soil Science》 被引量: 228发表: 1980年 The comparative ion exchange capacities of natural sedimentary and synthe...
This chapter focuses on recent advances in the field of ion-exchanger-based voltammetric sensors, whose widespread use has given rise to a new electroanalytical technique named ion exchange voltammetry (IEV). The chapter starts with a brief historical overview and a short introduction to voltammetric...
Ion exchangeis a traditional concept and its resins have been the most successful industrial materials formolecular recognition[1]. By common definition, ion exchange entails an insoluble solid material that contains exchangeable cations or anions. These ions can be substituted with a stoichiometrically ...
Effect of the size of the exchangeable cations on the ion-exchange properties of heteropoly saltsA comparative study of the exchange behaviour of pyridinium, picolinium, lutidinium and collidinium salts of tungstophosphoric as well as of molybdophosphoric acid has been made. The exchange ...
Ion exchange is the substitution of one ion for another on the surface or in the interstices of a crystal. It does not affect crystal structure. Ion exchange in clay minerals occurs because clay minerals can sorb cations and, to a lesser extent, anions from solution. However, when exposed ...
The total number of the cation exchange (S t cat) and the anion exchange (S t an) groups were determined in the root cell walls. The number of the functional group of each type (ΔS j) was estimated, and the corresponding values of pK a j were calculated. It was shown that for ...
Solvation of exchangeable cations in sulfonated polystyrene ion-exchange resins: an ESR study The solvation of Cu 2+ ions in sulfonated poly(styrene鈥揷o-divinylbenzene) ion-exchange resins has been studied by electron spin resonance (ESR) spectrosc... M.Naderi,J.A.Dale,G.M.B.Parkes - 《Re...
Organicion exchangersare three-dimensional covalent networks that contain exchangeable ions associated with fixed acid or basic groups. The term ‘ion exchange resins’ is also used to describeorganic ionexchangers. The ion exchangers that have fixed acid groups and carry exchangeable cations (usually ...
Ion exchange in clay minerals occurs because clay minerals can sorb cations and, to a lesser extent, anions from solution. However, when exposed to a different solution, some of these sorbed ions are ‘exchanged’ for other ions. The exchange of ions between the solution and the clay ...
In zeolite structures some quadrivalent Si is replaced by trivalent Al, giving rise to a deficiency of positive charge which is counterbalanced by mono- and divalent exchangeable cations. Thanks to their low cost, large availability, high cation exchange capacity (CEC), selectivity towards ammonium ...