其它主题
李艳霞,徐理超,熊雄,苏秋红,吴娟,李帷,陈玉成.典型矿业城市农田土壤重金属含量的空间结构特征——以辽宁省阜新市为例[J].环境科学学报,2007,27(4):679-687
典型矿业城市农田土壤重金属含量的空间结构特征——以辽宁省阜新市为例
- The spatial structure feature of heavy metals in agricultural soil of mining city:A case study of Fuxin, China
- 基金项目：国家重点基础研究发展规划项目(No.2004CB418507);中国科学院知识创新工程重点项目(No.KZCX3-SW-435);中国科学院地理科学与资源研究所知识创新工程领域前沿项目资助(No.CXIOG-A05-02)
- 作者
- 单位
- 李艳霞
- 中国科学院地理科学与资源研究所, 北京100101
- 徐理超
- 1. 中国科学院地理科学与资源研究所, 北京100101; 2. 西南大学资源环境学院, 重庆400716
- 熊雄
- 中国科学院地理科学与资源研究所, 北京100101
- 苏秋红
- 1. 中国科学院地理科学与资源研究所, 北京100101; 2. 山东农业大学资源环境学院, 泰安271018
- 吴娟
- 1. 中国科学院地理科学与资源研究所, 北京100101; 2. 山东农业大学食品科学与工程学院, 泰安271018
- 李帷
- 中国科学院地理科学与资源研究所, 北京100101
- 陈玉成
- 西南大学资源环境学院, 重庆400716
- 摘要：运用地统计学方法对阜新市矿业密集区周围农田土壤重金属含量的空间结构特征进行了定量描述,并探讨了研究区域内重金属空间结构的主要影响因素.结果表明:研究区域农田土壤中As、Cd、Cu、Ni、Pb、Zn等6种重金属元素的实验变异函数理论模型拟合效果较好,决定系数均达到0.01显著性水平;各重金属变程较大,除As以外均出现明显的漂移;变异函数的块金效应明显,空间相关性属中等,显示小尺度上受人为干扰的影响较大;除Ni的空间结构表现为各向同性以外,其余5种重金属均表现出明显的方向性特点;除土壤母质因素外,研究区域内以矿业和城市活动为主的人为干扰是影响农田重金属空间结构的重要原因.
- Abstract：Fuxin city has more than one hundred years mining history. Mining activities have induced the regional air and water pollution, whereas the knowledge about the agricultural soil quality is scarce. To well know the soil quality becomes very important cause the local government has turned their attentions to the agricultural industries when the coal resources start to dwindle. In this study, 180 agricultural soil samples were collected in urban and suburb of Fuxin city and the concentrations of As、Cd、Cu、Ni、Pb and Zn were analyzed. The spatial structure features of heavy metals were quantitatively described using geo-statistical methods. The well-defined spatial structures of six heavy metals were obtained, their testing variograms completely matched theoretical structure. The obvious nugget effects and moderate spatial dependences suggested that the spatial variabilities of heavy metals might be affected by anthropogenic activities in small-scale. The concentrations of heavy metals showed obviously directional feature, except Ni was isotropy. Besides the influence from parent soil materials, the mining and the urban citizen activities might contribute primarily to the spatial structures of heavy metal distributions.
摘要点击次数： 2890 全文下载次数： 3755
