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

Hiromasa Kiyota, Shinji Otsuka, Akihito Yokoyama, Satoshi Matsumoto, Hidenori Wada and Shinjiro Kanazawa
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Hiromasa Kiyota: Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo, Japan
Shinji Otsuka: Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo, Japan
Akihito Yokoyama: Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo, Japan
Satoshi Matsumoto: Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo, Japan
Hidenori Wada: Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo, Japan
Shinjiro Kanazawa: Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo, Japan

Soil and Water Research, 2012, vol. 7, issue 3, 109-116

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.

Keywords: microbial counts; soil nitrogen cycle; tetrachloroethylene; 1; 1-trichloroethane; trichloroethylene (search for similar items in EconPapers)
Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlswr:v:7:y:2012:i:3:id:30-2011-swr

DOI: 10.17221/30/2011-SWR

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