北方农业学报 ›› 2019, Vol. 47 ›› Issue (6): 79-83.doi: 10.3969/j.issn.2096-1197.2019.06.14

• 农业生态环境·农业气象 • 上一篇    下一篇

乌拉特灌域北部农田土壤重金属污染特征及生态风险分析

田志强, 韩翠莲, 霍轶珍   

  1. 河套学院 土木工程系/内蒙古自治区河套灌区灌溉排水工程技术研究中心,内蒙古 巴彦淖尔 015000
  • 收稿日期:2019-11-11 发布日期:2020-01-19
  • 通讯作者: 韩翠莲(1968—),女,副教授,学士,主要从事节水灌溉技术的研究工作。
  • 作者简介:田志强(1985—),男,讲师,硕士,主要从事水资源保护、水环境治理的研究工作。
  • 基金资助:
    内蒙古自治区高等学校科学研究项目(NJZY16335); 河套学院科学技术研究项目(HYZY201937); 内蒙古自治区河套灌区灌溉排水工程技术研究中心项目(K201754); 内蒙古自治区高等学校创新团队发展计划项目(NMGIRT-B1611)

The characteristics and ecological risk of farmland soil heavy metal pollution in North Urad Irrigation Area

TIAN Zhiqiang, HAN Cuilian, HUO Yizhen   

  1. Civil Engineering Department/ Inner Mongolia Autonomous Region Research Center of Engineering and Technology for Irrigation and Drainage in Hetao Irrigation Area,Hetao College,Bayannur 015000,China
  • Received:2019-11-11 Published:2020-01-19

摘要: 以农用地土壤污染风险管控标准为依据,采用潜在生态风险指数法评价农田土壤重金属污染风险,为河套灌区乌拉特灌域北部农田土壤风险管控提供理论依据。结果表明:研究区土壤Cd、Hg、As、Pb、Cr含量均低于农用地土壤污染风险管控风险筛选值,土壤污染风险低,农用地安全利用类型为优先保护类;相对于地区土壤背景值,除Cd外,Hg、As、Pb、Cr 4种重金属平均含量均低于背景值,但部分点位的Cd、Pb、Cr含量超标,超标率分别为54.5%,15.2%,21.4%;Cd、As、Pb、Cr、Hg单项潜在生态风险指数平均值从大到小分别为8.39,0.93,0.40,0.38,0.28,综合潜在生态风险指数平均值为10.39,潜在风险指数同样表明研究区农田土壤污染风险较低,为轻微生态风险水平。

关键词: 乌拉特灌域, 土壤污染, 农田土壤, 生态风险, 风险管控, 重金属

Abstract: Based on the standard of agricultural soil pollution risk management and control,the potential ecological risk index method was used to evaluate the risk of farmland soil pollution and the quality of the soil,which provided a theoretical basis for farmland soil risk management and control in the North Urad Irrigation Area of Hetao Irrigation Area.The results showed that the content of Cd,Hg,As,Pb and Cr in the soil of the survey area was lower than the risk screening value of soil pollution risk management and control,indicating that the risk of soil pollution was low,and the safe use of agricultural land is subjected to the priority protection.Compared with the regional soil background value,except for Cd,the average content of the other four heavy metals were all lower than the background value,but the content of Cd,Pb and Cr in some sites exceeded the standard,and the exceeding rate was respectively 54.5%,15.2% and 21.4%.The average value of the single potential ecological risk index of Cd,As,Pb,Cr and Hg was 8.39,0.93,0.40,0.38 and 0.28,respectively from high to low,and the average value of the comprehensive potential ecological risk index was 10.39.The potential risk index also showed that the risk of farmland soil pollution in the survey area was low,which is at a slight ecological risk level.

Key words: Urad Irrigation Area, Soil pollution, Farmland soil, Ecological risk, Risk management and control, Heavy metal

中图分类号: 

  • X53