来宾市兴宾区蔗田土壤重金属分析与评价

Analysis and Evaluation of Heavy Metal from Soil of Sugarcane Field in Xingbin District of Laibin City

为分析"中国糖都"来宾市兴宾蔗区土壤重金属污染现状,对来宾市兴宾蔗区蔗田15个表层土壤样品的重金属Cu、Pb、Ni、Cd、Cr的含量进行检测,利用单项污染指数法、内梅罗综合污染指数法、潜在生态危害指数法对土壤重金属污染特征及生态风险进行评价。结果表明,蔗区土壤中Cu、Pb、Ni、Cd、Cr等重金属含量均值分别为3.21、9.57、14.05、0.04、231.01 mg/kg,均未超过《土壤环境质量农用地土壤污染风险管控标准(试行)》(GB15618-2018)所列土壤风险管制值。15个取样点中有9个土壤样本显示受到重金属Cr污染,有1个土壤样本显示受到重金属Cd污染。蔗区土壤重金属综合污染潜在危害程度为轻微生态危害。

The purpose of the study was to analyze the heavy metal pollution of the sugarcane soil in Xingbin district of Laibin City, the sugar capital in China. The content of Cu, Pb, Ni, Cd and Cr in 15 surface soil samples from the sugarcane fields in Xingbin district were examined, and the pollution characteristics and ecological risks of soil heavy metals were evaluated by using the single pollution index method, the Nemerow integrated pollution index method and the potential ecological hazard index method. The results showed that the average values of Cu, Pb, Ni, Cd, Cr in the soils of sugarcane fields were 3.21, 9.57, 14.05, 0.04, 231.01 mg/kg, respectively, which did not exceed the soil risk control values listed in the Soil Environmental Quality Risk Control Standards for Agricultural Land Contamination(Trial)(GB15618-2018). Nine soil samples out of 15 sampling points showed Cr contamination, and 1 soil sample showed Cd contamination.The potential hazard level of heavy metal contamination in the sugarcane fields soil is minor ecological hazard.