南京市紫金山土壤中6种重金属的污染特征和污染水平评价

发布时间：2018-01-17 01:04

本文关键词：南京市紫金山土壤中6种重金属的污染特征和污染水平评价　出处：《环境污染与防治》2017年10期 　论文类型：期刊论文

【摘要】：为探究人类活动对南京市紫金山国家森林公园土壤重金属污染的影响,研究了紫金山土壤中6种重金属(Cu、Zn、Pb、Cr、Ni、Mn)的污染特征,并采用单因子指数法和内梅罗综合指数法进行了污染水平评价。结果表明:Cu的质量浓度范围为4.21~249.75mg/kg,平均值为64.08mg/kg;Zn的质量浓度范围为155.26~418.75mg/kg,平均值为212.34mg/kg;Pb的质量浓度范围为112.19~608.91mg/kg,平均值为319.57mg/kg;Cr的质量浓度范围为29.54~201.25mg/kg,平均值为127.36mg/kg;Ni的质量浓度范围为46.64~142.48mg/kg,平均值为76.16mg/kg;Mn的质量浓度范围为182.59~1 634.48mg/kg,平均值为1 008.93mg/kg。总体而言,上层样(0~20cm)的重金属浓度高于下层样(20~40cm),高海拔的重金属浓度低于低海拔的。内梅罗综合指数表明,所有采样点均处于重度污染状态。分析6种重金属的单因子指数发现,主要是因为Pb的单因子指数较大。
[Abstract]:In order to investigate the effects of human activities on soil heavy metal pollution in Zijinshan National Forest Park of Nanjing, the pollution characteristics of six heavy metals in Zijinshan soil were studied. The pollution level was evaluated by single factor index method and Nemero comprehensive index method. The results showed that the mass concentration of Cu was in the range of 4.21 mg / kg and 249.75 mg / kg. The average value was 64.08 mg / kg; The range of Zn concentration is 155.26 ~ 418.75 mg / kg, the average value is 212.34 mg / kg; The concentration of Pb in the range of 112.19 mg / kg was 608.91 mg / kg, the average value was 319.57 mg / kg; The range of Cr concentration is 29.54 ~ 201.25 mg / kg, the average value is 127.36 mg / kg; The concentration range of Ni is 46.64 ~ 142.48 mg / kg, the average value is 76.16 mg / kg; Mn concentration ranges from 182.59 to 1 634.48 mg / kg, with an average of 1 008.93 mg / kg. The concentration of heavy metals in the upper layer (0 ~ 20 ~ 20 cm) was higher than that in the lower layer (20 ~ 40 cm ~ (-1)), and the concentration of heavy metals in the high altitude was lower than that in the low altitude. The single factor index of six heavy metals was found to be mainly due to the large single factor index of Pb.
【作者单位】：南京林业大学生物与环境学院;
【基金】：国家自然科学基金青年基金资助项目(No.51308300) 江苏省高校优势学科建设工程项目(No.PAPD)
【分类号】：X53;X825
【正文快照】： 研究表明,城市土壤中重金属Cu、Zn、Pb、Cr、Ni、Mn受人类活动的影响较大,主要来源于交通废气、机动车部件磨损、公园化肥及农药的施用等[1]。随着城市化进程的推进,人类活动对南京市紫金山国家森林公园的影响不断增大,其土壤受到了不同程度的重金属污染。本研究采集了对南京

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