FORMATION OF CHLORINATED HYDROCARBONS BY WATER CHLORINATION

Model experiments were carried out on the reaction behaviour of benzen e, phenol and phenylalanine during chlorination with NaOCl in aqueous solution. The influence of the pH-value, concentration, reaction time and UV-light were also determined. These experiments were conducted un der conditions similar to chlorination of water and the reaction produ cts were identified by capillary GC and GC/MS. All chlorinated isomers of benzene including HCB, formed by chlorination of benzene, were ide ntified and quantified. However, monochlorobenzene was the major react ion product (in mu g/l-concentrations). The chlorinated organic substa nces formed by the reaction of phenol with NaOCl were determined quant itatively. Phenylalanine/NaOCl reaction lead to the formation of 22 ch lorinated organic compounds. Thirteen of these were identified and qua ntified. Under the influence of UV-light, the reaction of benzene/NaOC l formed primarily higher chlorinated propane derivatives, chlorinated phenols and octachlorocyclohexandiene derivatives. Similar results we re obtained with the reaction of phenol/NaOCl and the phenylalanine/Na OCl. The formation of chloroform during all these reactions were deter mined quantitatively.