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Temporal-spatial distribution and variability of cadmium contamination in soils in Shenyang Zhangshi irrigation area, China
Alternative TitleTemporal-spatial distribution and variability of cadmium contamination in soils in Shenyang Zhangshi irrigation area, China
Sun Lina1; Zhang Yaohua1; Sun Tieheng1; Gong Zongqiang1; Lin Xin1; Li Haibo1
2006
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume18Issue:6Pages:1241-1246
AbstractHeavy metal contamination in soils has been of wide concern in China in the last several decades. The heavy metal contamination was caused by sewage irrigation, mining and inappropriate utilization of various agrochemicals and pesticides and so on. The Shenyang Zhangshi irrigation area (SZIA) in China is a representative area of heavy metal contamination of soils resulting from sewage irrigation for about 30 years duration. This study investigated the spatial distribution and temporal variation of soil cadmium. contamination in the SZIA. The soil samples were collected from the SZIA in 1990 and 2004; Cd of soils was analyzed and then the spatial distribution and temporal variation of Cd in soils was modelled using kriging methods. The kriging map showed that long-term sewage irrigation had caused serious Cd contamination in topsoil and subsoil. In 2004, the Cd mean concentrations were 1.698 and 0.741 mg/kg, and the maxima 10.150 and 7.567 mg/kg in topsoils (0-20 cm) and subsoils (20-40 cm) respectively. These values are markedly more than the Cd levels in the second grade soil standard in China. In 1990, the Cd means were 1.023 and 0.331 mg/kg, and the maxima 9.400 and 3.156 mg/kg, in topsoils and subsoils respectively. The soil area in 1990 with Cd more than 1.5 mg/kg was 2701 and 206.4 hm(2) in topsoils and subsoils respectively; and in 2004, it was 7592 and 1583 hm(2), respectively. Compared with that in 1990, the mean and maximum concentration of Cd, as well as the soil area with Cd more than 1.5 mg/kg had all increased in 2004, both in topsoils and subsoils.
Other AbstractHeavy metal contamination in soils has been of wide concern in China in the last several decades. The heavy metal contamination was caused by sewage irrigation, mining and inappropriate utilization of various agrochemicals and pesticides and so on. The Shenyang Zhangshi irrigation area (SZIA) in China is a representative area of heavy metal contamination of soils resulting from sewage irrigation for about 30 years duration. This study investigated the spatial distribution and temporal variation of soil cadmium contamination in the SZIA. The soil samples were collected from the SZIA in 1990 and 2004; Cd of soils was analyzed and then the spatial distribution and temporal variation of Cd in soils was modelled using kriging methods. The kriging map showed that long-term sewage irrigation had caused serious Cd contamination in topsoil and subsoil. In 2004, the Cd mean concentrations were 1.698 and 0.741 mg/kg, and the maxima 10.150 and 7.567 mg/kg in topsoils (0-20 cm) and subsoils (20-40 cm) respectively. These values are markedly more than the Cd levels in the second grade soil standard (LSGSS) in China (GB15618-1995). In 1990, the Cd means were 1.023 and 0.331 mg/kg, and the maxima 9.400 and 3.156 mg/kg, in topsoils and subsoils respectively. The soil area in 1990 with Cd more than 1.5 mg/kg was 2701 and 206.4 hm2 in topsoils and subsoils respectively; and in 2004, 7592 and 1583 hm~2. Compared with soils Cd levels in 1990, the mean and the maximum concentration of Cd, as well as the soil area with Cd more than 1.5 Mg/kg had all increased in 2004, whether in topsoils or in subsoils.
KeywordGEOSTATISTICAL ANALYSIS LEAD CONTAMINATION HEAVY-METALS SWISS JURA SEDIMENTS RISK temporal-spatial distribution cadmium contamination of soil Zhangshi sewage irrigation area (ZSIA) Shenyang
Indexed ByCSCD
Language英语
CSCD IDCSCD:2460385
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/151870
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.中国科学院
3.Liaoning Res Institute Geol & Mineral Resources
Recommended Citation
GB/T 7714
Sun Lina,Zhang Yaohua,Sun Tieheng,et al. Temporal-spatial distribution and variability of cadmium contamination in soils in Shenyang Zhangshi irrigation area, China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2006,18(6):1241-1246.
APA Sun Lina,Zhang Yaohua,Sun Tieheng,Gong Zongqiang,Lin Xin,&Li Haibo.(2006).Temporal-spatial distribution and variability of cadmium contamination in soils in Shenyang Zhangshi irrigation area, China.JOURNAL OF ENVIRONMENTAL SCIENCES,18(6),1241-1246.
MLA Sun Lina,et al."Temporal-spatial distribution and variability of cadmium contamination in soils in Shenyang Zhangshi irrigation area, China".JOURNAL OF ENVIRONMENTAL SCIENCES 18.6(2006):1241-1246.
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