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Engenharia Sanitaria e Ambiental

versão impressa ISSN 1413-4152

Resumo

PASCHOALATO, Cristina Filomena Pereira Rosa; TRIMAILOVAS, Márcio Resende  e  DI BERNARDO, Luiz. Formation of halogenated organic byproducts using preoxidation with chlorine, ozone and peroxone and post-chlorination of water containing humic substances. Eng. Sanit. Ambient. [online]. 2008, vol.13, n.3, pp. 313-322. ISSN 1413-4152.  http://dx.doi.org/10.1590/S1413-41522008000300011.

When chlorine is used as preoxidant, the formation of halogenated organic byproducts found in water treated and distriduted to the population, are: trihalometane, haloacetic acids, haloaldehyde, haloketone, halophenol and halopicrin. This research was performed to evaluate the formation potential of 22 byproducts using the following preoxidants: chlorine, ozone and peroxone. The formation of byproducts was simulated in water prepared with the addition of humic substances extracted from peat soil by the use of preoxidants, coagulation, filtration, and post-chlorination. Byproducts have quantified by gas chromatography with electron capture detector. The results obtained showed that the use of alternative preoxidants, such as ozone and peroxone, associated with coagulation, filtration, and post-chlorination form a low concentration of byproducts.

Palavras-chave : Treatment of drink water; humic substances; preoxidation; byproduct formation; halogenated compound; ozone; peroxone.

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