Effects of highly volatile organochlorine solvents on soil nitrogen metabolism and microbial counts

Hiromasa Kiyota, Shinji Otsuka, Akihito Yokoyama, Satoshi Matsumoto, Hidenori Wada, Shinjiro Kanazawa

Research output: Contribution to journalArticle

Abstract

The effects of highly volatile organochlorine solvents (1,1,1- trichloroethane, TCET; trichloroethylene, TCE; and tetrachloroethylene, PCE) on soil nitrogen cycle and microbial counts were investigated using volcanic ash soil with different fertilizations. All the solvents significantly inhibited the activity of the cycle under the sealed conditions with 10 to 50 mg/g (dry soil) solvents added. No significant difference between the solvents, and between fertilization plots, was observed. Nitrate ion was not accumulated, and instead, ammonium ion was highly accumulated in the presence of the solvents. Nitrite ion was partially detected, while l-glutaminase activity was inhibited. The growths of ammonification, nitritation, nitratation and denitrification bacteria, and filamentous fungi were significantly inhibited in the presence of 10 mg/g (dry soil) of the solvents.

Original languageEnglish
Pages (from-to)109-116
Number of pages8
JournalSoil and Water Research
Volume7
Issue number3
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • 1,1,1-trichloroethane
  • Microbial counts
  • Soil nitrogen cycle
  • Tetrachloroethylene
  • Trichloroethylene

ASJC Scopus subject areas

  • Aquatic Science
  • Soil Science

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  • Cite this

    Kiyota, H., Otsuka, S., Yokoyama, A., Matsumoto, S., Wada, H., & Kanazawa, S. (2012). Effects of highly volatile organochlorine solvents on soil nitrogen metabolism and microbial counts. Soil and Water Research, 7(3), 109-116.