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中国农学通报

中国农学通报 ›› 2017, Vol. 33 ›› Issue (19): 93-100.doi: 10.11924/j.issn.1000-6850.casb17030167

所属专题： 土壤重金属污染

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

粤北矿区污染农田土壤中重金属分布特征及相关性研究

焦洪鹏,朱凰榕,江海燕,陈亚刚,冯先翠,赵秋香   

  1. (广东省地质实验测试中心,广州 510080）
  • 收稿日期:2017-03-25 修回日期:2017-05-31 接受日期:2017-05-02 出版日期:2017-07-11 发布日期:2017-07-11
  • 通讯作者: 赵秋香
  • 基金资助:
    2014 年广东省省级环境保护专项资金项目“‘镉米’产地重金属污染土壤修复技术研究及应用示范”（粤环[2014]126 号文）

Distribution Characteristics and Correlations of Heavy Metals in Contaminated Farmland Soils in Yuebei Mining Area

Jiao Hongpeng, Zhu Huangrong, Jiang Haiyan, Chen Yagang, Feng Xiancui, Zhao Qiuxiang   

  1. (Guangdong Province Research Center for Geoanlysis, Guangzhou 510080)
  • Received:2017-03-25 Revised:2017-05-31 Accepted:2017-05-02 Online:2017-07-11 Published:2017-07-11

PDF (PC)

341

摘要： 为了了解调查区域的土壤污染现状和为粤北矿区土壤修复提供科学依据，采用网格法进行布点采样，采集了144个表层土壤样，通过单因子污染指数法、综合污染指数法以及相关性等对测试数据进行分析。结果表明，重金属Cd、Zn、Ni、Pb超标率分别达100%、96.53%、6.25%、3.00%；土壤重金属Cd、Zn单项污染指数分别为3.59、1.90，表明地块已受到这2种重金属的复合污染，其中Cd污染最严重，Pb、Ni、Cu的Pi均小于0.7，属于安全范围。其中，土壤中Pb(0.9851)、Zn(0.9197)、Cd(0.8994)有效态含量与全量的相关性均达到极强相关水平，表明其在土壤中极易发生迁移，潜在的生态污染风险较大；Cu、Ni有效态含量与全量的相关性也达强相关水平，在土壤中的迁移能力也不可忽视。

关键词: 雷竹笋, 雷竹笋, 绿色保鲜, 壳聚糖, 覆膜, 现场冷却

Abstract: To understand the contamination status of the survey area and provide a scientific basis for soil restoration in Yuebei mining area, 144 surface soil samples were collected by using systematic grid sampling method, and the test data of soil samples were analyzed by single factor pollution index method, comprehensive pollution index method and correlation analysis etc. The results showed that: the contents of heavy metals Cd, Zn, Ni, Pb exceeded the standard rate by 100%, 96.53%, 6.25%, 3.00%, respectively; the Cd and Zn single pollution index in soil were 3.59 and 1.90, indicating that the land was polluted by two kinds of heavy metals, in which Cd pollution was most serious; however, the single pollution index of Pb, Ni and Cu were less than 0.7, indicating that the pollution degree was within the safe range; thereinto, the correlation between available and total heavy metals Cd, Pb and Zn in soil reached the extremely strong level; the correlation coefficient of Pb in soil was the highest (0.9851), followed by that of Zn (0.9197) and Cd (0.8994), indicating that Cd, Pb and Zn were easily transported in soil, and the potential ecological pollution risk was high; additionally, the correlation between available and total heavy metals Cu and Ni also reached a strong level, and their migration ability in soil could not be ignored.