基于环境磁学响应监测林地土壤中金属元素  

Monitoring of Metallic Elements in Forest Soil based on Environmental Magnetic Response

作　　者：王钊 郭宇 欧阳婷萍 郑小战 朱照宇[3] 石晓龙 WANG Zhao;GUO Yu;OUYANG Ting-ping;ZHENG Xiao-zhan;ZHU Zhao-yu;SHI Xiao-long(Guangzhou Geological Survey Institute,Guangzhou,Guangdong 510440,China;School of Geography,South China Normal University,Guangzhou,Guangdong 510631,China;Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,Guangdong 510640,China)

机构地区：[1]广州市地质调查院,广东广州510440 [2]华南师范大学地理科学学院,广东广州510631 [3]中国科学院广州地球化学研究所,广东广州510640

出　　处：《环境监测管理与技术》2022年第6期47-51,共5页The Administration and Technique of Environmental Monitoring

基　　金：中国地质调查局基金资助项目(DD20190291);广州市国土资源和规划委员会基金资助项目([2017]03);广州市“岭南英杰”后备人才基金资助项目([2019]928)。

摘　　要：采集并测试广州市林地土壤样品600余组,分析土壤中As、Cr、Cd、Hg、Cu、Pb、Zn、Ni和磁学性质的相关性。结果表明:土壤磁性颗粒以软磁性矿物为主,北部以超顺磁、多畴颗粒为主,南部以单畴、多畴颗粒为主。相关性分析表明:北部Cu、Ni、Cr、Cd与较粗的磁性颗粒共存,Cd与软磁性矿物共存,As与超顺磁颗粒共存且为自然源;南部相关关系不显著,Ni和As来源为人为源;不同污染程度土壤回归方程相关系数均较好,南部深-浅层回归方程证明上述8种元素和磁性相关性不受自然来源或人类活动影响。More than 600 groups of forestland soil samples in Guangzhou were collected and tested,the correlation between As,Cr,Cd,Hg,Cu,Pb,Zn,Ni and magnetic properties was analyzed.The results showed that the soil magnetic particles were mainly soft magnetic minerals.Superparamagnetic and multi-domain particles dominated in the north,single domain and multi-domain particles dominated in the south.Multiple regression analysis showed that in the north,Cu,Ni,Cr,Cd were found in coarse magnetic particles,Cd was in soft magnetic minerals,As was in superparamagnetic particles and was natural sources.While in the south,there was no significant correlation,the sources of Ni and As were anthropogenic.The correlation coefficients of the regression equations of different pollution levels of soil were good.The regression equation of deep shallow soil in the south proved that the correlation between the above 8 elements and magnetic properties was not affected by natural sources or human activities.

关 键 词：金属元素 磁学特征 磁性颗粒 反演模型 林地土壤 

分 类 号：X833[环境科学与工程—环境工程]