沧州市东部某种植区土壤重金属来源分析  

Source Analysis of Heavy Metals in Soil of a Planting Area in the East of Cangzhou

作　　者：章琳 ZHANG Lin(Zhejiang Ocean University,Zhoushan,Zhejiang 316022)

机构地区：[1]浙江海洋大学,浙江舟山316022

出　　处：《安徽农业科学》2023年第12期69-73,共5页Journal of Anhui Agricultural Sciences

摘　　要：通过对沧州市东部农业种植区土壤重金属As、Cd、Cr、Cu、Co、Hg、Ni、Zn、V空间分布特征、主导分布趋势、源解析分析进行研究,通过传统统计学、PMF、RDA等数据处理方法,归纳有效来源和影响因素。结果表明:相对于中国土壤背景值而言,研究区表层土壤Cr、Hg和Pb平均含量偏高,为60.440、0.058和26.340 mg/kg,其余Cd、Zn、Ni、Cu、As平均含量偏低,分别为0.167、63.490、23.340、22.330、8.230 mg/kg。经典统计学的3种方法均表明,As、Cr、Cu、Ni之间和Cd、Pb、Zn之间各自来源可能存在一致性。PMF和RDA研究结果表明,土壤重金属来源主要为3种,即大气沉降因素解释了Hg(79.8%),地质背景源分别解释As(82.2%)、Cr(72.3%)、Cu(72.1%)和Ni(76.8%),人为活动影响因素分别解释Cd(78.3%)、Pb(80.9%)和Zn(78.5%)。同时,As、Cu、Cr和Ni与环境因子中Al_(2)O_(3)和SiO_(2)相关性强,证明其与地质背景相关;Cd、Pb、Zn与环境因子中N、P、MgO和CaO相关性强。厘定了沧州市该种植区表层土壤重金属的源和汇。The spatial distribution characteristics,dominant distribution trends,and source analysis of heavy metals As,Cd,Cr,Cu,Co,Hg,Ni,Pb,Zn,and V in soils of the eastern agricultural growing area of Cangzhou City were studied,and the effective sources and influencing factors were summarized by traditional statistical,PMF,and RDA data processing methods.The results showed that the average contents of Cr,Hg and Pb in the surface soils of the study area were high at 60.440,0.058 and 26.340 mg/kg relative to the background values of Chinese soils,and the average contents of the remaining Cd,Zn,Ni,Cu and As were low at 0.167,63.490,23.340,22.330 and 8.230 mg/kg,respecotively.kg.all three methods of classical statistics suggest that there may be consistency between the respective sources of As,Cr,Cu,and Ni and between Cd,Pb,and Zn.the results of the PMF and RDA studies indicate that the soil heavy metal sources are divided into three main categories,i.e.,atmospheric deposition factors explain Hg(79.8%),geological background sources explain As(82.2%),Cr(72.3%),Cu(72.1%)and Ni(76.8%),and anthropogenic activity influence factors explained Cd(78.3%),Pb(80.9%)and Zn(78.5%),respectively.Meanwhile,As,Cu,Cr and Ni were strongly correlated with Al_(2)O_(3) and SiO_(2) in the environmental factors,another strong evidence of their correlation with geological background;Cd,Pb and Zn were strongly correlated with N,P,MgO and CaO in the environmental factors.The sources and sinks of heavy metals in the surface soils of this planting area in Cangzhou City are clarified,and methodological references are provided for the prevention and control of heavy metal pollution in the surface soils of suburban areas around municipalities as well as for planning.

关 键 词：土壤重金属 冗余分析 经典统计学 沧州市 

分 类 号：X53[环境科学与工程—环境工程]