Temporal-spatial distribution and variability of cadmium contamination in soils in Shenyang Zhangshi irrigation area, China

IMR OpenIR

	Temporal-spatial distribution and variability of cadmium contamination in soils in Shenyang Zhangshi irrigation area, China
其他题名	Temporal-spatial distribution and variability of cadmium contamination in soils in Shenyang Zhangshi irrigation area, China
	Sun Lina 1; Zhang Yaohua 1; Sun Tieheng 1; Gong Zongqiang 1; Lin Xin 1; Li Haibo 1
	2006
发表期刊	JOURNAL OF ENVIRONMENTAL SCIENCES
ISSN	1001-0742
卷号	18 期号:6 页码:1241-1246
摘要	Heavy 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.
其他摘要	Heavy 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.
关键词	GEOSTATISTICAL ANALYSIS LEAD CONTAMINATION HEAVY-METALS SWISS JURA SEDIMENTS RISK temporal-spatial distribution cadmium contamination of soil Zhangshi sewage irrigation area (ZSIA) Shenyang
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:2460385
引用统计	被引频次：6[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/151867
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.中国科学院 3.Liaoning Res Institute Geol & Mineral Resources
推荐引用方式 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.