以典型赤泥堆场为研究对象,分析自然环境条件下赤泥堆场的盐分组成变化.结果表明:随着堆存年限的增加,赤泥中盐含量呈降低趋势;CO32-是赤泥中占主导地位的阴离子,约占阴离子组成比例的34.14%~73.26%;赤泥可交换态阳离子及水溶态阳离子以Na+为主,可交换态Na+占可交换态阳离子组成比例60.50%~83.94%,水溶态Na+占水溶态阳离子组成比例71.32%~91.16%;随着堆置年限的增加,赤泥中Ca2+、HCO3-含量升高,而Na+、SO42-、CO32-含量降低,K+、Mg2+含量变化趋势不明显;赤泥中盐含量和SO42-、CO32-、Na+含量呈正相关关系,而与HCO3-、Ca2+、Mg2+含量呈负相关关系.Na+含量和CO32-含量过高是赤泥高盐分含量的主要原因,这为赤泥堆场土壤化处置和植被重建过程中盐分调控提供科学依据.
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