Influence of rice growth on the fate of polycyclic aromatic hydrocarbons in a subtropical paddy field: A life cycle study

Yan Wang, Shaorui Wang, Chunling Luo, Yue Xu, Suhong Pan, Jun Li, Lili Ming, Gan Zhang, Xiangdong Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)

Abstract

We measured the concentrations and profiles of polycyclic aromatic hydrocarbons (PAHs) in the soil, water, and rice tissues from a typical subtropical paddy system at various stages of rice growth over two growing seasons. Rice growth had a significant impact on the distribution and dissipation of PAHs in the paddy field. While rice was growing, the concentrations of PAHs in the soils decreased at an average decline rate of 5.3±2.9ngPAHsg-1soild-1, whereas, the concentrations of PAHs in rice tissues increased with growth time. However, the concentrations of PAHs in the rice leaves decreased during the heading stage of both two growing seasons. PAH profiles in soil, water, and different rice tissues also showed different patterns with the growing time of rice. Irrigation water was a significant source of PAHs to the paddy field. Rice growth enhanced the dissipation and transport of PAHs in the paddy system, while the sewage irrigation and straw burning after harvest added or returned PAHs to the system. For food safety precaution, sewage irrigation and straw burning should be well monitored and controlled.
Original languageEnglish
Pages (from-to)1233-1239
Number of pages7
JournalChemosphere
Volume119
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Environmental fate
  • Paddy field
  • PAHs
  • Rice
  • Soil
  • Water

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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