云南省农田表土重金属分布特征与污染评价  

Distribution characteristics and pollution assessment of heavy metals in farmland topsoil in Yunnan province

作　　者：张子豪 李海侠[1] 王家明 胡静远 王美辰 叶俊民 王杨 Zhang Zihao;Li Haixia;Wang Jiaming;Hu Jinyuan;Wang Meichen;Ye Junmin;Wang Yang(Kunming University of Science and Technology,Kunming Yunnan 650093,China;Shandong Geological Exploration Institute of China Chemical Geology and Mine Bureau,Ji'nan Shandong 250000,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]中化地质矿山总局山东地质勘查院,山东济南250000

出　　处：《化工矿物与加工》2024年第2期54-60,共7页Industrial Minerals & Processing

基　　金：国家自然科学基金地区基金项目(42064005)。

摘　　要：为了解云南省农田表土中重金属含量的分布特征和污染情况,在全省范围内农田设立了113个具有代表性的表土采样点,测定了样品中Cu、Pb、Cr、Zn含量。采用单因子指数法、内梅罗综合污染指数法、地统计学分析及Pearson相关性分析对表土重金属污染进行了评价,结果表明:Cu、Pb、Cr、Zn四种重金属含量均值分别是云南省背景值的1.87、1.52、1.92、1.39倍;Cu、Cr、Zn含量的空间分布大体呈东高西低,Pb含量呈从西南到东北逐渐降低的趋势,综合污染指数分布与重金属含量分布较为一致;相关性分析中Pb、Zn与有机质呈显著正相关,Cu、Cr与砂粒呈正相关。Cu、Cr、Zn在空间分布和相关性分析中均显示其有相似的来源,推测为有机肥料。整体上,云南省农田污染属于轻微污染。In order to understand the distribution characteristics and pollution situation of heavy metal content in farmland topsoil in Yunnan province,sampling points of 113 representative topsoil were set up in farmland in Yunnan province to determine the content of Cu,Pb,Cr,and Zn in the samples.The single factor index method,Nemero comprehensive pollution index method,geostatistical analysis,and Pearson correlation analysis was used to evaluate heavy metal pollution in topsoil.The results showed that the average contents of Cu,Pb,Cr,and Zn were 1.87,1.52,1.92,and 1.39 times higher than the background values in Yunnan province,respectively;The spatial distribution of Cu,Cr,and Zn content is generally high in the east and low in the west,while content of Pb gradually decreases from southwest to northeast.The distribution of comprehensive pollution index is consistent with the that of heavy metal content;In the correlation analysis,Pb and Zn are significantly positively correlated with organic matter,while Cu and Cr are positively correlated with sand particles.Cu,Cr,and Zn have similar sources in spatial distribution and correlation analysis,suggesting that they are organic fertilizers.Overall,farmland pollution in Yunnan province belongs to mild pollution.

关 键 词：农田表土 重金属污染 有机质 地统计分析 单因子指数法 内梅罗综合污染指数法 

分 类 号：X53[环境科学与工程—环境工程]