乌鲁木齐市水磨河沿岸土壤重金属污染现状及评价
CSTR:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

X26;X82

基金项目:

国家自然科学基金重点项目(41130531)


Status Quo and Evaluation of Heavy Metal Pollution in the Riparian Soils of the Shuimo River in Urumqi
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    选择干旱区典型城市河流乌鲁木齐市水磨河为研究区,结合经典统计学与地统计学相关方法理论,研究了乌鲁木齐市水磨河沿岸土壤重金属含量的分布特征及其污染评价。结果表明:水磨河沿岸土壤重金属含量在土层深度上差异较小;从土地利用方式来看,人为活动明显干扰重金属在沿岸土壤分布中的含量变化,重金属元素间的相关关系在一定程度上反映着几种重金属的同源性与差异性;主成分分析表明,Cu和Zn为水磨河沿岸土壤特征重金属元素,且重金属因子负载图表明Cu和Zn含量存在多因素控制;从空间分布来看,水磨河表层土壤重金属含量分布高值点位置基本相似,主要在河流南端(上游硫磺沟附近)并与河道遇水库、遇支流有关,高值点主要集中在青格达湖、塔桥湾水库、九道湾水库和硫磺沟附近;水磨河沿岸不同土层重金属的单因子污染指数平均值均小于1,整体表现为未污染状态;内梅罗综合污染指数分别为1.26(0—20 cm),1.20(20—40 cm),1.32(40—60 cm),介于1.0<P≤2.0之间,处于Ⅲ级,为轻度污染;各土层对不同重金属具有较高的承载力,属中容量区,水磨河沿岸整体土壤重金属环境质量良好。综上可知,Cu和Zn是主要的污染重金属元素,重金属污染受到工厂分布、河流改道及水库建设等人为活动影响。综合不同评价结果认为,目前水磨河沿岸土壤处于未受污染或轻度污染状态,环境质量良好。

    Abstract:

    The study area was Shuimo River, a typical urban river in the arid area in Urumqi. Heavy metal contents and distribution characteristics in the riparian soils of the Shuimo River were studied, and heavy metal pollution was evaluated, by combining classical statistics and geo-statistics correlation method. The results showed that the contents of heavy metals differed slightly at different soil depths. From the aspect of land use mode, human activities significantly interfered with the change of heavy metal content in the riparian soils, the correlations between heavy metals reflect the homology and diversity of several heavy metals to some degree. The results of principal component analysis indicated that Cu and Zn were the characteristic heavy metals which were controlled by multiple factors. From the aspect of spatial distribution, the peak value points of the distribution of heavy metals in the surface soil was similar, being mainly at the southern tip of the river. Single factor pollution indices of heavy metals in the riparian soils at different depths were all less than one, indicating that the soil was not polluted. Nemerow integrated pollution index in the riparian soils at different depth was 1.26 (0—20 cm),1.20 (20—40 cm) and 1.32 (40—60 cm), respectively, all with 1.0<P≤2.0 and at level Ⅲ, indicating slight pollution. The carrying capacity for different heavy metals in different soil layers was relatively high, belonging to the moderate capacity region. In general, the environmental quality in regard of heavy metals in the riparian soils of Shuimo River was in a good condition. In summary, Cu and Zn are the main heavy metals causing pollution, and heavy metal pollution is affected by human activities such as factory distribution, river diversion and reservoir construction. In short, there is yet no pollution or light pollution in the riparian soils of Shuimo River currently, the environmental quality is good.

    参考文献
    相似文献
    引证文献
引用本文

马辉英, 杨晓东, 龚雪伟, 陈悦, 吕光辉.乌鲁木齐市水磨河沿岸土壤重金属污染现状及评价[J].水土保持学报,2016,(6):300~307

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2016-12-30
  • 出版日期:
文章二维码