Based on the analysis of sediments flocculation process, an empirical formula between the settling velocity of the fine sediment flocculation and the ion concentration is established. And in this process the most important ions in river are high valency cations. settling velocity by ions is flocculation of fine sediment. The fundamental cause of generating influence on the. It is necessary to amend the formula to compute the velocity in this situation. So the formula could not compute the velocity of the sediment particle settling in the water with ions. But the sediment settling velocity formula could not reflect the influence before. The ions in the nature river would affect the fine sediment settling velocity. The bearing of these results on our notions concerning the nature of the carrier mechanism is discussed, and a structural conception of the association between ion and carrier advocated. 1The absorption and competition behaviour of Rb and Cs at different concentrations cannot be understood on the basis of the view that the binding sites involved in the absorption of these ions are separate and completely independent units.2In some important features there is a close though not absolute similarity between the effect of concentration on the steady rate of absorption of Rb and Cs after 3 hours, on the one hand, and on the additional amount of Rb and Cs absorbed within the first 3 hours, on the other.
represent cation bound to protoplasmatic binding sites. Absorption periods of 3 and 6 hours respectively enabled the separate estimation of the steady rate of uptake setting in after about 3 hours and the additional amount of cation absorbed within the first 3 hours, which is supposed to.
Excised barley roots were allowed to absorb Rb and Cs from single or mixed Rb- and Cs-chloride solutions of various concentrations in the presence of 10 me/1 CaSO4.