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Geoscience ›› 2017, Vol. 31 ›› Issue (03): 534-544.

• Geochemistry • Previous Articles     Next Articles

Geochemical Characteristics and Influence Factors of Elemental Contents in Rainfall and Leaching Water in the Typical Areas of Hunan

JIANG Hua(), HOU Qingye(), YANG Zhongfang, ZOU Mufei, YUAN Jiaxin   

  1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
  • Received:2016-11-18 Revised:2017-02-09 Online:2017-06-10 Published:2017-06-27

Abstract:

This paper reported the characteristics of ion and heavy metal element contents such as Cd in rainfall water and leaching water in typical areas of Hunan, China, and discussed the leaching influence factors of heavy metal elements. The results showed that the contents of SO42- and heavy metal elements in rainfall water in Chenzhou and Zhuzhou were both significantly higher than those of Guidong-Rucheng as well as Yueyang. The air pollution was more serious in Chenzhou and Zhuzhou. However, such obvious differences were not detected in leaching water. Here, the ratio of leaching concentration(heavy metal element contents in leaching water/ heavy metal element contents in rainfall water)was used to show accumulative difference of heavy metal elements. The results indicated that the contribution of rainfall to the accumulation of heavy metal elements such as Cd in soils in Chenzhou and Zhuzhou was greater than those of Guidong-Rucheng and Yueyang. It obviously illustrated that the heavy metal elements such as Cd in surface soil had an accumulating trend in Chenzhou and Zhuzhou. The leaching influence factors of heavy metal elements are very complicated, of which organic carbon contents and pH of soil are the key factors to control the leaching capacities of As, Cd and Pb.

Key words: rainfall water, leaching water, heavy metal element, the ratio of leaching concentration, influence factor

CLC Number: