PuSH - Publikationsserver des Helmholtz Zentrums München: Trichloroacetic acid in Norway spruce/soil-system. I. Biodegradation in soil.

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Matucha, M.* ; Forczek, S.T.* ; Gryndler, M.* ; Uhlirova, H.* ; Fuksová, K.* ; Schröder, P.

Trichloroacetic acid in Norway spruce/soil-system. I. Biodegradation in soil.

Chemosphere 50, 303-309 (2003)

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Open Access Gold möglich sobald Verlagsversion bei der ZB eingereicht worden ist.

Abstract
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Trichloroacetic acid (TCA) as a phytotoxic substance affects health status of coniferous trees. It is known as a secondary air pollutant (formed by photooxidation of tetrachloroethene and 1,1,1-trichloroethane) and as a product of chlorination of humic substances in soil. Its break-down in soil, however, influences considerably the TCA level, i.e. the extent of TCA uptake by spruce roots. In connection with our investigations of TCA effects on Norway spruce, microbial processes in soil were studied using ¹⁴C-labeling. It was shown that TCA degradation in soil is a fast process depending on TCA concentration, soil properties, humidity and temperature. As a result, the TCA level in soil is determined by a steady state between uptake from the atmosphere, formation in soil, leaching and degradation. The process of TCA degradation in soil thus participates significantly in the chlorine cycle in forest ecosystems.

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