农田土壤重金属污染特征及Pb同位素源解析——以崇州隆兴镇为例  

Heavy Metal Pollution Characteristics and Pb Isotopic Source Analysis in Farmland Soil——Take Longxing Town in Chongzhou as an example

作　　者：袁宏[1] 叶娇珑[1] 匡爱兵[1] 钟红梅[1] YUAN Hong;YE Jiao-long;KUANG Ai-bing;ZHONG Hong-mei(Sichuan Institute of Nuclear Geology,Chengdu 610061,China)

机构地区：[1]四川省核工业地质调查院,成都610061

出　　处：《四川环境》2021年第6期233-239,共7页Sichuan Environment

摘　　要：为定量解析农田土壤重金属污染来源,以崇州市隆兴镇为研究区,采用PCA/APCS受体模型和Pb同位素示踪技术,分析了研究区农田土壤重金属污染特征并解析了污染来源。研究区农田土壤Cd、Hg存在较高的潜在生态风险;研究区农田表层土壤Pb含量中化肥Pb贡献率为21. 71%、降尘Pb贡献率达78. 29%,农田浅层土壤Pb含量中化肥Pb贡献率为26. 23%,降尘Pb贡献率达73. 77%。结果表明当地农田土壤重金属污染受降尘影响较大,应加强大气质量的监测和管控。相关技术方法和成果可为农田土壤重金属污染源解析提供借鉴参考,可为当地农田土壤重金属污染的“源头控制”提供科学支撑,对农业安全生产和经济社会稳定发展具有重要意义。In order to quantitatively analyze the sources of heavy metal pollution in farmland soil,taking Longxing town of Chongzhou city as the research area,the characteristics of heavy metal pollution in farmland soil and the pollution sources were analyzed by using PCA/APCs receptor model and Pb isotope tracer technology.Cd and Hg in farmland soils in the research area have high potential ecological risks.The contribution rate of Pb from chemical fertilizer in farmland surface soil in the research area is 21.71%,and that from dust fall is 78.29%.In the shallow soil,the contribution rate of Pb from chemical fertilizer is26.23%,and that from dust fall is 73.77%.The results showed that the heavy metal pollution of local farmland soil was greatly affected by dust fall,and the monitoring and control of air quality should be strengthened.Related technical methods and achievements can provide references for the analysis of heavy metal pollution sources in farmland soil,and can provide scientific support for the"source control"of heavy metal pollution in local farmland soil,which is of great significance to agricultural safety production and economic and social stable development.

关 键 词：重金属 土壤 潜在生态危害指数 铅同位素 崇州 

分 类 号：X53[环境科学与工程—环境工程]