无机钠盐可以提高活性炭对腐殖物质的吸附能力。通过zeta电位测量，研究了盐与碳表面之间的相互作用与盐类型和浓度的关系。在恒定pH值下，增加腐殖物质浓度显著增加了zeta电位负值的幅度，而增加盐浓度则中和了zeta电位。盐的阴离子对吸附容量或zeta电位的变化几乎没有影响。 因此，钠离子浓度是导致腐殖酸物质吸附增加的主要因素，可能是通过腐殖酸分子和碳表面官能团上负电荷的中和。包括16个参考文献、图表。

Inorganic sodium salts were found to enhance the adsorptive capacity of activated carbon for humic substances. The interactions between the salts and the surface of the carbon were investigated as a function of salt type and concentration by zeta potential measurements. At a constant pH, increasing the concentration of humic substances markedly increased the magnitude of the negative value of the zeta potential, whereas increasing salt concentration neutralized the zeta potential. The anion of the salts had little effect on adsorptive capacity or on the change in the zeta potential. Sodium ion concentration is thus the primary factor responsible for the increased adsorption of humic substances, probably via the neutralization of negative charges on both humate molecules and carbon surface function groups. Includes 16 references, figures.