土壤学报2023，Vol.60Issue(6)：1832-1840,9.DOI:10.11766/trxb202206060235
大气颗粒沉降对城市土壤性状的影响:道路灰尘的磁学证据
Effects of the Deposition of Atmospheric Particulate Matter on the Properties of Urban Soils:Evidence from Magnetic Susceptibility of Road Dusts
摘要
Abstract
To study the effects of deposition of atmospheric particulate matter(APM)on the properties of urban soils,the values of magnetic susceptibility(χlf)and heavy metals in the topsoils and road dust in the industrial,traffic,residential and agricultural areas of Baoshan District,Shanghai,were analyzed.The topsoils in the different functional areas of Baoshan District,Shanghai,commonly have significantly enhanced magnetic strength(χlf = 130.7×10-8 m3·kg-1 on average)of about 86.2%higher than the local magnetic background.χlf of the road dusts nearby the topsoils in the different functional areas was even more significantly enhanced,which was 903.3×10-8 m3·kg-1 on average.Likewise,heavy metal contents in the road dust were significantly higher than those in the nearby topsoils in the different functional areas.The contents of Cu,Zn,Pb,Cd,Ni,Cr,Co,Mn and Fe in the road dust were 3.4,2.4,4.7,22,1.5,2.8,1.2,1.4 and 1.6 times of those in the topsoils on average,respectively.Moreover,χlf of the topsoils in the Baoshan District was extremely significantly correlated with the contents of Cu,Zn,Cd,Ni,Cr and Mn(P<0.01),and also significantly correlated with Pb and Fe(P<0.05).Likewise,χlf of the road dust was also significantly correlated with the content of Zn,Ni,Cr,Co,Mn and Fe(P<0.01),and with Cu(P<0.05).Nevertheless,such correlations in the different functional areas of the district are highly different.Those in the agricultural topsoils are not significant.The distinctive characteristics of the road dust in the studied areas suggested that the APM under the urban environment contain a certain amount of anthropogenic magnetic particles enriched in heavy metals.The long-term and continuous deposition of such magnetic pollutants has led to the enhancement of magnetic signals and heavy metal contents in urban topsoils synchronously,and also adversely impacted the properties of urban soils significantly.关键词
城市表土/道路灰尘/重金属/磁化率Key words
Urban soils/Road dust/Heavy metals/Magnetic susceptibility(χlf)分类
资源环境引用本文复制引用
王新栋,胡雪峰,张延硕,崔蕾,刘睿,蓝文翀,李梅,王加元..大气颗粒沉降对城市土壤性状的影响:道路灰尘的磁学证据[J].土壤学报,2023,60(6):1832-1840,9.基金项目
国家自然科学基金项目(41877005)资助Supported by the National Natural Science Foundation of China(No.41877005) （41877005）
