GEOGRAPHICAL RESEARCH ›› 2010, Vol. 29 ›› Issue (6): 989-996.doi: 10.11821/yj2010060004

• Environment and Ecology • Previous Articles     Next Articles

Concentrations and risk of heavy metals in surface soil and dust in urban squares and school campus in Beijing

LI Xiao-yan1,2, CHEN Tong-bin1, LEI Mei1, XIE Yun-feng1, SONG Bo1   

  1. 1. Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China
  • Received:2009-09-20 Revised:2010-03-25 Online:2010-06-20 Published:2010-06-20

Abstract: Heavy metals pollution of soils is a major environmental problem. Heavy metals in urban soils could cause deleterious effects on human health by contacts with skin and intakes unconsciously. Soil and dust samples in squares and school campus in Beijing were collected for assessing the concentrations and health risks of heavy metals. The results showed that the concentrations of heavy metals in the soils and dusts presented a lognormal distribution. The concentrations of Cu, Pb and Zn in soils, As, Cu, Pb, Zn and Cd in dusts were all higher than the background concentrations of soils in Beijing, and 67% (27%), 13% (63%), 83% (100%), 73% (100%), 83% (100%) and 53% (100%) of the soils (dusts) samples exceeded the background values of soils in Beijing for As, Ni, Cu, Pb, Zn and Cd, respectively. Relatively speaking, Zn was accumulated in soils, while Cd, Cu, Pb and Zn were accumulated in dusts. The concentrations of Cu, Pb and Zn in dusts were significantly higher than in soils. The concentrations of Ni, Pb and Zn in dusts in school campus were significantly higher than in squares. There are no significant health risks of heavy metals from dusts in school campus.

Key words: heavy metal, square, school campus, soil, dust, Beijing