Na+对河流溶解性物质解吸规律影响的试验研究

以Ca2+解吸总量和解吸平衡溶液的pH值作为溶解性物质解吸的特征指标,采用静态试验方法,初步研究了解吸溶液中的Na+对溶解性物质解吸规律的影响。结果表明,颗粒物成分和粒径相同时,随着解吸溶液中Na+初始浓度的升高,溶解性物质解吸总量逐渐增大,并趋于一极大值,溶解性物质解吸总量的增加值逐渐减小;颗粒物成分相同而粒径不同或颗粒物粒径相同而成分不同时,同一Na+初始浓度下,溶解性物质解吸总量不等。解吸溶液中Na+初始浓度相同时,对于不同种类的溶解性物质,其解吸总量随颗粒物成分或粒径变化的规律不同。颗粒物成分和粒径相同时,在同一Na+初始浓度下,不同种类溶解性物质的解吸过程具有较好的伴随特性。

Experimental study of the effects of Na+ on the desorption of soluble matters in rivers

Taking the total desorption quantity of Ca2+ and pH of the equilibrium desorption solution as the representative indexes to evaluate the desorption of soluble matters, this paper primarily investigates the effect of Na+ on the desorption of soluble matters, based on the static state experiments. The results indicate that, with respect to the same sediment and particle size, the total desorption quantity of soluble matters increases with the increment of initial Na+ concentration of the desorption solution, and gradually reaches a maximum amount. With the same sediment but different particle size or in the same particle size but different sediment, the total desorption quantity of soluble matters is of great difference from the same initial Na+ concentration. For the same initial Na+ concentration with different soluble matters, the variation of the total desorption quantity with sediment components or particle size is also different. With the same sediment, particle size and initial Na+ concentration, the desorption process has a good concomitance with different soluble matters.