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1. The adsorption action of basic zinc carbonate adsorbent on uranium in natural seawater can be expressed with the following formula of adsorption isotherm:C=k(U*)n = 8.51× 10-1(U*)0.49,where C is the concentration of uranium on adsorbent; U* is content of uranium in natural seawater employed.2. when the quantity of basic zinc carbonate adsorbent (T) is constant, with the increase of natural seawater quantity through the adsorption column (G), also increased are the adsorption content of uranium of the adsorbent (U), the concentration of uranium on the adsorbent (C) and the concentration of residual uranium (C0*) in natural seawater after adsorbing uranium, while the rate of recovery of uranium (R) is decreased. With the increase of (G) the coefficient of distribution (Kd) decreases to a certain value and then a little rises again. 相似文献
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An account is given of the thermodynamical characteristics of the adsorption of uranyl complex ions on hydrous titanium oxide (HTO) in NaCl-NaHCO3 solution and in seawater. Determined are the adsorption isotherms and the adsorption density in various pH. The contribution of each component to the adsorption density, the adsorption free energy ΔGads,t, the coulostatic energy ΔGcoul,t. and the cqemisorption potential energy Gchem. t are estimated. The average free energy ΔGads enthalpy change, ΔHads, and entropy change, ΔSads, of the adsorption in this system are -7.33 kcal/mol, 6.30 kcal/mol and 45.7 cal/mol K respectively. It is hereof concluded that the complex chemisorption process is spontaneous and thermonegativc. 相似文献
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