摘要
为了解聊城市郊土壤重金属含量,采用高压密封消解法进行预处理,利用火焰原子吸收分光光度计对大棚内、外不同土层5种重金属的空间分布进行研究。结果表明,棚内外5种土壤重金属含量由高到低依次为Fe、Mn、Cr、Cu、Cd,变化范围依次为7 333.90~7 729.93、630.66~780.21、214.27~247.38、27.63~44.08、0~0.36μg/g。除第3土层镉和第5土层锰两个位点外,其余位点同一层次棚内各重金属含量均大于棚外土壤,棚内、外土壤重金属单因子污染指数均小于1,耕层土壤的单因子污染指数由大到小依次为PCr>PCu>PCd>PFe>PMn。该地区土壤重金属污染风险程度较低,符合农作物种植要求。
In order to demonstrate the content of soil heavy metals in Liaocheng suburbs, sealed digestion method under high pressure and flame atomic absorption spectrophotometer were used to study the spatial distribution of heavy metals from different soil layers in and out of greenhouse. The results showed that soil heavy metals content gradually decreased in sequence of Fe,Mn,Cr,Cu,Cd,both in greenhouse and out of greenhouse,and content ranges were respectively 7 333.90~7 729.93,630.66~780.21,214.27~247.38,27.63~44.08,0~0.36 μg/g. At the same soil depth, heavy metal content inside of greenhouse was much higher than outside except cadmium at third soil layer and manganese at fifth soil layer. But the single factor indice of soil heavy metals pollution were all less than 1,and the single factor pollution index descended as PCr〉PCu〉PCd〉PFe〉PMn. The risk of soil heavy metal pollution in Liaocheng suburb was lower than standard, which showed that the soil was safe in crop cultivation.
出处
《湖北农业科学》
2018年第2期45-47,共3页
Hubei Agricultural Sciences
基金
国家自然科学基金项目(31272383)
山东省自然科学基金项目(ZR2013DL005)
山东省大学生科技文化创新项目(26312178824)
关键词
大棚
土壤重金属
污染指数
空间分布
greenhouse
soil heavy metals
pollution index
spatial distribution
