Abstract：
:The heavy metal concentrations of soil and dust samples from roadside, residential areas, parks, campus sport grounds, and commercial sites were studied in Guangzhou, South China. Heavy metals in samples were determined by inductively coupled plasma atomic emission spectrophotometer following acidic digestion with HClO(4) + HF + HNO(3). High concentrations, especially of Cd, Pb, and Zn, were found with mean concentrations of Cd, Cr, Cu, Ni, Pb, and Zn in the urban dusts being 4.22 ± 1.21, 62.2 ± 27.1, 116 ± 30, 31.9 ± 12.6, 72.6 ± 17.9, and 504 ± 191 mg/kg dry weight, respectively. The respective levels in urban soils (0.23 ± 0.19, 22.4 ± 13.8, 41.6 ± 29.4, 11.1 ± 5.3, 65.4 ± 40.2, and 277 ± 214 mg/kg dry weight, respectively), were significantly lower. The integrated pollution index of six metals varied from 0.25 to 3.4 and from 2.5 to 8.4 in urban soils and dusts, respectively, with 61 % of urban soil samples being classified as moderately to highly polluted and all dust samples being classified as highly polluted. The statistical analysis results for the urban dust showed good agreement between principal component analysis and cluster analysis, but distinctly different elemental associations and clustering patterns were observed among heavy metals in the urban soils. The results of multivariate statistic analysis indicated that Cr and Ni concentrations were mainly of natural origin, while Cd, Cu, Pb, and Zn were derived from anthropogenic activities.
journal_name
Environ Monit Assessjournal_title
Environmental monitoring and assessmentauthors
Cai QY,Mo CH,Li HQ,Lü H,Zeng QY,Li YW,Wu XLdoi
10.1007/s10661-012-2617-xsubject
Has Abstractpub_date
2013-02-01 00:00:00pages
1095-106issue
2eissn
0167-6369issn
1573-2959journal_volume
185pub_type
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