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- Title
Heavy metal contamination of cultivated wetland soils along a typical plateau lake from southwest China.
- Authors
Junhong Bai; Baoshan Cui; Zhifeng Yang; Xiaofeng Xu; Qiuyi Ding; Haifeng Gao
- Abstract
Topsoil (0–20 cm) samples were collected from four cultivated wetlands including Northern and Western Fields (about 30-year tillage), and Southern and Western Fields (about 20-year tillage) along the Yilong Lake of China in October, 2005. Total concentrations of As, Cr, Cu, Pb, and Zn were determined using the inductively coupled plasma atomic absorption spectrometry in order to assess contamination status in four sampling plots. Results showed that the average concentrations of these heavy metals in Northern and Western Fields were significantly ( P < 0.01) higher than those in reference soils, while they were generally lower in Southern and Eastern Fields. All the mean concentrations of heavy metals were lower, except that the average concentrations of As and Cr in Northern Field slightly exceeded the soil quality guidelines. The contamination indices showed low-contamination levels for As, Cu, Pb, and Zn in Northern and Western Fields, while no contamination levels could be observed in Southern and Eastern Fields. As for Cr, they showed moderate-contamination levels in Northern Field, but low or no contamination levels in other three Fields. The integrated contamination index values indicated Northern and Western Fields were moderately contaminated, while Southern and Eastern Fields were less contaminated. The same contamination sources of these heavy metals were identified in these fields using factor- and cluster analysis.
- Subjects
CHINA; SOIL pollution; HEAVY metals; WETLANDS; SPECTROMETRY; CLUSTER analysis (Statistics)
- Publication
Environmental Earth Sciences, 2010, Vol 59, Issue 8, p1781
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-009-0160-z