磷和砷专性吸附对砖红壤胶体动电电位的影响

    EFFECT OF PHOSPHATE AND ARSENATE ADSORPTION ON ZETA-POTENTIAL OF LATERITE COLLOID

    • 摘要: 不同Na_2HPO_4和NaH_2AsO_4浓度及其配比的试验表明,磷酸根离子和砷酸根离子专性吸附都会显著地降低砖红壤胶体的ζ电位及其等电点(IEP),但后者的吸附对动电性质(ζ电位和IEP)的影响比前者的影响更大.磷和砷的专性吸附对砖红壤表面电荷的影响是很相似的.

       

      Abstract: From the results of the electrophoresis experiments with different concentrations of Na2HPO4 and NaH2AsO4, and different ratios between the two salts, it was concluded that the specific adsorption of phosphate and arsenate in laterite soil reduced significantly the Zeta-potential and TEP of the colloid, but the influence of the latter was larger than that of the former. Therefore, behaviours of the specific adsorption of phosphate and arsenate on surface charge of laterite soil were similar.

       

    /

    返回文章
    返回