Characteristics: Trichloroethene (TCE) is colourless liquid, fire resistant with sweet odour. TCE is strongly narcotic having low irritating effect.
Applications: TCE is used as effective solvent for many organic matters. It was primary used in food processing industry for vegetable oil from vegetable materials as a soya, coconut and palm. Later it was used in chemical industry for producing dry cleaning establishments, degreasing agent and solvent of fat, oil and wax. TCE was also used in machine industry for degreasing of metals. Demand after TCE began to decline in the half of 20th century.
Toxicity: This compound can cause the insomnia, eczemas and when it gets into the eyes it is dangerous for cornea. In the case of transpiration of TCE the acute poisoning occur. TCE is toxic and carcinogenic. There are also cases of liver and kidney cancer.
Reaction with iron: Chlorinated ethenes are toxic substances which belong to the most common pollutants in the ground water, degrading for very long time in environment. The effectiveness of chlorinated ethenes removal from water using zero-valent iron was tested by J. Hanuš, Technical University in Liberec, Czech Republic in 2009. Many thanks to Doc. Dr. Ing. Miroslav Černík, CSc. and Ing. Bc. Štěpánka Klímková for providing this information.
Following figures show reactions with nanoscale zero-valent iron ~2g/l (after 20 days since application there is still the rest of nZVI) modified by rape oil, CMC = CarboxyMethyl Cellulose nad AX = Axilate (Polyacrylic acid).
TCE reduction by modified nZVI (dry nZVI powder NANOFER 25P dispersed in oil by laboratory dispersing unit DL 05).
TCE reduction by modified nZVI slurry products NANOFER 25 and NANOFER 25S.