Migration and Release of Dimethyl Phthalate in Purple Soil under Dry-Wet Alternation

Clc Number:

Fund Project:

National Key Research and Development Program of China(No.2017YFD0801000) and the Southwest University's Key Discipline of Ecology "211 Project"

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments

    【Objective】This paper is to characterize dimethyl phthalate (DMP) migration and release between overlying water, pore water and soil in the water level fluctuating zone of the Three-Gorges Reservoir during the wetting-drying alternation period.【Method】For the study a flooding experimental device was designed to carry out cyclical wet-dry alternation test using the "flooding-drying" model. 【Result】DMP content was found decreasing significantly in the soil during the first days (0~2 d) of the two flooding periods, but increasing from the third day on, and fluctuating slightly in the pore water and overlying water;it displayed a rising trend to a varying extent in the soil on the first days (0~1 d) of the two drying periods, and a declining one varying in degree on the following two days (2~4 d), and then leveled off during the late period (8~20 d). Soils with initial DMP content varying in the range of 10 ~ 100 mg•kg-1, when flooded, showed a similar trend in DMP migration and release between the three phases. However, DMP content in the overlying water showed a different trend from the other three groups, and the DMP distribution fluctuated greatly in the three phases,when soil initial DMP content was 200 mg•kg-1.【Conclusion】The quasi-second-order kinetic equation can be used to well describe migration of DMP in pore water and overlying water into the soil. Correlation analysis shows a significant positive correlation (P<0.05) exists between pore water and overlying water in DMP concentration, but a mildly negative one between soil and pore water.

    Cited by
Get Citation

YI Ping, ZENG Wei, LUO Meng, FANG Dandan, WANG Qiang. Migration and Release of Dimethyl Phthalate in Purple Soil under Dry-Wet Alternation[J]. Acta Pedologica Sinica,2019,56(5):1098-1107.

Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
  • Received:August 10,2018
  • Revised:March 13,2019
  • Adopted:April 02,2019
  • Online: July 03,2019
  • Published: