title: Lead and cadmium in leaves of deciduous trees in Beijing, China: development of a metal accumulation index (MAI).
abstract: Lead and cadmium uptake was investigated for common deciduous street trees in Beijing in this study. Species having Cd accumulation included Populus tomentosa, Sophora japonica and Catalpa speciosa. P. tomentosa had the highest ratios between leaf and soil Cd (0.848), followed by S. japonica (0.536), C. speciosa (0.493), Paulownia tomentosa (0.453) and Juglans regia (0.415). Pb levels were high in leaves of C. speciosa, J. regia and Pa. tomentosa. S. japonica had the highest ratio between leaf Pb and soil Pb (0.146), followed by Pa. tomentosa (0.143), Ginko biloba (0.103) and C. speciosa (0.095). A predictive foliar metal accumulation index (MAI) was developed and C. speciosa was calculated to have the highest MAI value (53.8). This suggests that C. speciosa would be a good choice for planting in areas of Beijing where soil contamination with Cd and Pb may be a problem.
authors.affiliation: Beijing Center for Physical and Chemical Analysis, Beijing 100089, China. liuyanju@hotmail.com
authors.forename: Yan-Ju
authors.initials: YJ
authors.lastname: Liu
authors.forename: Yong-Guan
authors.initials: YG
authors.lastname: Zhu
authors.forename: Hui
authors.initials: H
authors.lastname: Ding
mesh_terms: D002104:Cadmium / Q000032:analysis* / Q000493:pharmacokinetics; D002681:China; D004784:Environmental Monitoring / Q000379:methods; D007854:Lead / Q000032:analysis* / Q000493:pharmacokinetics; D018515:Plant Leaves / Q000737:chemistry* / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis* / Q000493:pharmacokinetics; D014197:Trees / Q000737:chemistry* / Q000378:metabolism; D014504:Urban Health
chemical_list: D012989:Soil Pollutants; D002104:Cadmium; D007854:Lead