【摘要】 采用平衡吸附法,研究了不同铵盐对潮褐土、红壤吸附Cd²⁺、Zn²⁺的影响。结果表明,土壤对Cd²⁺、Zn²⁺的吸附量随平衡溶液中Cd²⁺、Zn²⁺浓度的增加而增加;潮褐土和红壤对Cd²⁺、Zn²⁺的最大吸附量为:Zn²⁺>Cd²⁺,且潮褐土>红壤;随NH₄HCO₃浓度的增加,两种土壤对Cd²⁺、Zn²⁺的吸附率显著提高,NH₄Cl、NH₄NO₃和（NH₄）₂SO₄抑制红壤对Cd²⁺、Zn²⁺的吸附及潮褐土对Cd²⁺的吸附,对潮褐土Zn²⁺的吸附率影响不显著;铵盐浓度相同时,红壤对Cd²⁺吸附率为NH₄HCO₃>NH₄Cl>NH₄NO₃≈（NH₄）₂SO₄,红壤对Zn²⁺吸附率为NH₄HCO₃>NH₄Cl>NH₄NO₃>（NH₄）₂SO₄。更多还原

【Abstract】 The effects of different NH₄⁺ salts on Cd²⁺ and Zn²⁺ sorption in meadow cinnamon soils（MCS）and red soils （RS）were evaluated by batch method.The results showed that Cd²⁺ and Zn²⁺ amounts adsorbed by soils increased with the initial concentrations of added Cd²⁺ and Zn²⁺.The maximum amount of Cd²⁺ and Zn²⁺ sorption on MCS and RS were:Zn²⁺>Cd²⁺.The maximum amount of heavy metal ions adsorbed on soils was greater in meadow cinnamon soil than in red soil.The sorption percentage of Cd²⁺ and Zn²⁺ by soils decreased in the presence of NH₄HCO₃.NH₄⁺ salts, such as NH₄Cl,NH₄NO₃,and （NH₄）₂SO₄ restrained Cd²⁺ and Zn²⁺ sorption in RS and Cd²⁺ sorption in MCS.There was no significant effect of NH₄Cl,NH₄NO₃,and （NH₄）₂SO₄ on Zn²⁺ sorption in MCS.At the same concentration of NH₄⁺ salts,Cd²⁺ sorption percentage in RS was decreased in the following order:NH₄HCO₃>NH₄Cl>NH₄NO₃≈（NH₄）₂SO₄,and Zn²⁺ sorption percentage in RS in the following order:NH₄HCO₃>NH₄Cl>NH₄NO₃>（NH₄）₂SO₄.更多还原