Study of the influence of different diphenol compounds on soil microbial activity by microcalorimetry

Huilun Chen, Jun Yao, Fei Wang, G. Záray

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Microcalorimetry was applied to follow the toxic effects caused by different diphenol compounds on microbial activity of Chinese fir soil. The activity of the microorganisms in soil was stimulated by adding 0.3 mL of a nutrient solution containing 2.5 mg of glucose and 2.5 mg of ammonium sulfate and the measurements were performed under a 35% controlled humidity at 28°C. Power-time curves recorded on a microcalorimeter were followed by increasing the amount of diphenol compounds, which affected directly the total thermal effects evolved by the microorganisms. The curves showed a synergism on total thermal effect obtained by the addition of 2000 mg•kg-1 of resorcinol, causing a consumption of resorcinol by the microorganisms as a new source of nutrients. Above this dose, the total thermal effect decreased exponentially. However, the addition of catechol and hydroquinone caused the total thermal effects to decrease directly. It was concluded that the increase in the diphenol concentration strongly affected the microbial life in this ecosystem. Microcalorimetry appears as a suitable technique to carry out both qualitative and quantitative comparative studies of microbial activity in soil.

Original languageEnglish
Pages (from-to)2125-2129
Number of pages5
JournalChinese Journal of Chemistry
Volume27
Issue number11
DOIs
Publication statusPublished - Nov 2009

Fingerprint

Thermal effects
Microorganisms
Soils
Poisons
Ammonium Sulfate
Ecosystems
Nutrients
Atmospheric humidity
Glucose
resorcinol

Keywords

  • Diphenol compounds
  • Microcalorimetry
  • Soil microbial activity

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Study of the influence of different diphenol compounds on soil microbial activity by microcalorimetry. / Chen, Huilun; Yao, Jun; Wang, Fei; Záray, G.

In: Chinese Journal of Chemistry, Vol. 27, No. 11, 11.2009, p. 2125-2129.

Research output: Contribution to journalArticle

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