Concentration, Distribution, and Influencing Factors on Soil Selenium in Guangzhou
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摘要: 对广州市不同地区的土壤硒含量、分布特点及影响因素进行研究。结果表明, 广州地区表层土壤的硒含量相对较高。总硒含量的变幅为0.02~2.87mgkg-1,GM为0.314mgkg-1, 有效硒的变幅为1.01~115.01gkg-1,GM为19.879gkg-1。广州地区土壤硒的空间分布呈现较大差异, 富硒地区主要集中在南沙区、番禺区南部及增城区东部。广州地区土壤硒含量主要受成土母质的影响, 酸性条件下富含有机质的砂质粘土和花岗岩硒含量较高。pH、土壤有机质含量和CEC对土壤硒的分布也有影响。Abstract: The concentration and distribution of Selenium (Se) in the soils in the city of Guangzhou, as well as the factors affecting them were investigated. Se content in soil samples collected from areas in the city was determined by the hydride generation atomic absorption spectrometry. The results indicated that Se was higher in the surface layer of the soil. The total Se in soil ranged from 0.02 mgkg-1 to 2.87 mgkg-1 with a GM of 0.314mgkg-1, and the available Se from 1.01 gkg-1 to 115.01 gkg-1 with a GM of 19.879gkg-1. A significant variation on the levels of Se contamination in the municipal areas was observed. The more highly contaminated regions included the eastern part of south Nansha District, Panyu District, and Zengcheng District. The soil Se concentration and distribution appeared to be affected greatly by the type and properties of the soil. Under the acidic condition, the sandy clay and granite soil rich in organic matters tended to have high concentrations of Se. It appeared that pH, organic matters, and CEC all contributed to the variation on the concentration and distribution of Se in the soil throughout the city.
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Keywords:
- Guangzhou /
- soil /
- Se /
- distribution /
- affecting factor
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