[Revaluation of soil heavy metals pollution in Zhangshi irrigation area of Shenyang and analysis of Cd forms in soil].
This paper revaluated the situation of cadmium (Cd) pollution in rice field soils of Zhangshi irrigation area in Shenyang. The results indicated that the soil Cd pollution of test area was still quite serious. The Cd content in brown rice samples ranged from 0.435 to 0.855 mg x kg(-1), which exceeded the national criteria for food sanitation in China, and increased by 335%-755% compared with that 20 years ago. Brown rice Cd had a significant negative correlation with soil pH, and a positive correlation with soil available Cd. The decrease of soil pH induced more soil Cd transformed into available Cd which occupied 22.8%-52.0% of the total Cd and was easy to be absorbed by rice plant, inducing the Cd in brown rice exceeded national criteria. The pollutant Cd could transfer along with surface runoff, ground water and flying dust, making the pollution extend gradually.
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. xushenghui1981@163.com
Sheng-Hui
SH
Xu
Shu-Hai
SH
Guo
Xiao-Min
XM
Hu
Feng-Mei
FM
Li
Yue-Hong
YH
Wang
Han-Feng
HF
Ye
Ai-Ping
AP
Zhong
Chang-Hua
CH
Shi
D001673:Biodegradation, Environmental; D002104:Cadmium / Q000032:analysis*; D002681:China; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000032:analysis*; D012275:Oryza / Q000737:chemistry / Q000378:metabolism*; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*; D014872:Water Movements
D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium