摘要
为更好地了解沘江流域底泥中Pb的分布,以沘江流域底泥为研究对象,通过实地考察,应用统计分析等方法分析沘江流域底泥中Pb污染特征。结果表明:(1)沘江流域底泥Pb平均含量为1764.23 mg/kg;(2)底泥中Pb含量呈现上游>中游>下游趋势;(3)沘江流域底泥中Pb的单因子污染指数极高,上游、中游、下游平均单因子污染指数分别为6.04、2.51、2.03。综合分析流域底泥中Pb含量及单因子污染指数,发现沘江流域Pb污染状况严重,呈现上游>中游>下游趋势,极有可能影响沿岸农田土壤。
The paper aims to understand the distribution of Pb in the sediments of the Bijiang watershed,we took the sediments in the Bijiang watershed as the study object,and analyzed the Pb pollution characteristics in the sediments of the Bijiang watershed by field investigation and statistical analysis.The results showed that:(1)the average content of Pb in the sediments of the Bijiang watershed was 1764.23 mg/kg;(2)the content of Pb in sediments was upstream>midstream>downstream;(3)the single factor pollution index of Pb in the sediments of the Bijiang watershed was extremely high,and the average single factor pollution index of upstream,midstream and downstream was 6.04,2.51 and 2.03,respectively.Based on the comprehensive analysis of Pb content and single factor pollution index in the sediments of the basin,it is found that the pollution status of Pb in the Bijiang watershed is serious,showing an upstream>midstream>downstream trend,which is likely to affect the coastal farmland soil.
作者
韩云昌
张乃明
包立
杨牧青
Han Yunchang;Zhang Naiming;Bao Li;Yang Muqing(Yunnan Soil Fertility and Pollution Remediation Engineering Laboratory,Kunming 650201;College of Resource and Environment,Yunnan Agricultural University,Kunming 650201)
出处
《中国农学通报》
2020年第13期110-114,共5页
Chinese Agricultural Science Bulletin
基金
云南省科技惠民计划“沘江流域农田土壤重金属污染修复关键技术研究及应用”(2014RA018)
云南省科技创新人才计划(2015HC018)
对外科技合作计划-院士专家工作站(2015IC022)。
关键词
沘江流域
沉积物
PB
污染评价
分布特征
单因子污染指数
Bijiang watershed
sediment
Pb
pollution assessment
distribution characteristics
single factor pollution index
