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天然水体中泥沙组成具有非恒定性和非均匀性,而不同粒径泥沙的吸附能力差异很大。因此。讨论天然水体中泥沙对重金属污染物的自净能力,必须研究不同粒径泥沙共存(即非均匀沙)的吸附模式。通过系统室内静态试验,研究了不同粒径泥沙共存吸附的吸附动力学模式。它表明,不同粒径泥沙共存吸附体系各粒径之间不存在竞争和干扰,共存体系单位重量泥沙的吸附量等于各粒径泥沙单独存在,在相同条件下单位重量泥沙的吸附量乘以其在共存体系中所占份额的和。这在一定程度上解决了天然河流水体泥沙吸附量的计算问题。
The composition of sediment in natural water has non-constancy and inhomogeneity, while the adsorption capacity of sediment with different particle sizes varies greatly. therefore. In order to discuss the self-purification capacity of sediment in heavy metals for natural water, it is necessary to study the adsorption patterns of sediment with different particle sizes (ie, non-uniform sand). Through the static test in the system, the adsorption kinetics model of coexistence of sediment with different particle sizes was studied. It shows that there is no competition and interference between each particle size of sediment with different particle size. The adsorption capacity of sediment per unit weight of coexistence system is equal to the sediment of each particle size alone. Under the same conditions, the adsorption of sediment per unit weight Multiplied by the sum of their shares in the coexistence system. To a certain extent, this solves the problem of calculating the sediment adsorption capacity of natural river water.