Distribution Characteristics of Pb and Its Ecological Risk in Different Farmland Soils of Changchun Suburb

• 作者: Chen Minghui Liang Dongmei Shen Guisheng Su Wei
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 空间分布特征 潜在生态风险 农田土壤 铅含量 长春市 郊区 土地利用类型 菜地土壤
• 年，卷（期）: 2014,（4）
• 页码范围: 42-45
• 页数: 4页
• 分类号: X825

摘要

Pb in the farmland surface soil of Changchun suburb was taken as the main research object. The field research and laboratory analysis were used to investigate Pb content,spatial distribution characteristics and its ecological risk in different farmland soils. The results showed that Pb content was during 18. 85- 41. 34 mg /kg in farmland soil of Changchun suburb,and was higher than the background value of Jilin Province at 90%of the sampling sites. The spatial distribution of Pb content in farmland soil had obvious geographical features,and Pb content in southwest and northeast soils was higher. The high-content areas were relatively concentrated,and Pb content gradually reduced from the high-content islandshape center to its surrounding. The soil Pb contents in paddy field,dry field and vegetable field had insignificant difference with the background value,indicating that Pb accumulations in dry field,paddy field and vegetable field were not significant. The order of Pb content in different land use types was showed as follows: vegetable field > dry field > paddy field. Pb pollution of all samples belonged to light pollution. The average potential ecological risk of soil Pb in different land use types presented the following order: vegetable field > dry field > paddy field.