【摘要】 基于广东省3个第四纪沉积物成土母质的垂向土壤剖面样品分析数据，研究主量和铊（Tl）元素含量及剖面分布特征，并运用地质累积指数法和潜在生态危害指数法分析土壤中Tl污染的风险等级。结果表明：不同土壤剖面的主量元素以SiO₂、Al₂O₃和TFe₂O₃为主，三者含量可达87.94%;研究区在温暖湿润气候条件下，土壤经历了较为强烈的化学风化过程，土壤发育过程中常量元素的地球化学行为基本均表现为迁移淋失；样品中Tl含量均高于国家和广东省土壤背景值，表明Tl在土壤中呈现不同程度地富集。Tl污染风险等级分析结果显示，研究区土壤已受到了轻度的土壤Tl污染。更多还原

【Abstract】 Based on vertical soil profile samples of three quaternary sediments parent materials in Guangdong Province, studied the concentrations and distribution patterns of some major and thallium（T1）, analyzed risk level of T1 pollution in soil by using geological accumulation index method and potential ecological hazard index method. The results showed that, the main components in different profiles were SiO₂, Al₂O₃, and T Fe₂O₃, whose total content reached 87.94%. The soil in the study area experienced a relatively strong chemical weathering process under the warm and humid climate condition. The major elements were migrated and leached during the chemical weathering process. The concentrations of Tl was higher than the national and Guangdong soil background values, indicating that Tl was enriched to varying degrees in the soil. The analysis results of T1 pollution risk level revealed that soils in the study area have been slightly contaminated by T1.更多还原