Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | OXIDATION OF SULFUR-CONTAINING S-TRIAZINES DURING GROUNDWATER HYPOCHLORINATION |
| Abstract | With the aim to identify the reaction by-products, the oxidation of four sulfur-containing s-trazines (prometryne, terbutryne, ametryne and desmetryne) by sodium hypochlorite (NaClO) has been investigated using oxidant and herbicides initial concentrations respectively of 11 ppm and 3 ppm. Furthermore, to study the effect of reagent concentration on the oxidation rate, only for prometryne, the reaction has been carried out at two more oxidant and herbicide initial concentrations (ppm): 3 and 0.003, 0.011 and 0.003. Oxidation reactions were monitored by high performance liquid chromatography (HPLC), while the identification of by-products was at first carried out by HPLC-mass spectrometry (HPLC-MS) and then confirmed by accurate mass measurements. The results indicate that all the investigated triazines react in the same way. In the experimental conditions (T = 20-degrees-C, pH = 8, reaction time = 48 h) the reaction gives rise to three identified oxidation by-products: the sulfoxide, the sulfone and the sulfone's hydrolysis product. As expected, the lower the reagent's concentration the slower the oxidation rate. Based on the obtained results, a general pathway for the oxidation of sulfur-containing s-triazines is proposed. |
| Source | Wat Sci. Tech. 30 (7), pp. 53–59 |
| Keywords | DISINFECTIONCHLORINATIONTRIAZINESGROUNDWATER QUALITYOXIDATION BY-PRODUCTSABIOTIC DEGRADATIONHPLC-MS |
| Journal | Wat Sci. Tech. |
| Editor | Pergamon, Great Britain, |
| Year | 1994 |
| Type | Articolo in rivista |
| Authors | LOPEZ, A; MASCOLO, G; TIRAVANTI, G; SANTORI, M; PASSINO, R |
| Text | 323871 1994 ISI Web of Science WOS A1994QH65800009 DISINFECTION CHLORINATION TRIAZINES GROUNDWATER QUALITY OXIDATION BY PRODUCTS ABIOTIC DEGRADATION HPLC MS OXIDATION OF SULFUR CONTAINING S TRIAZINES DURING GROUNDWATER HYPOCHLORINATION LOPEZ, A; MASCOLO, G; TIRAVANTI, G; SANTORI, M; PASSINO, R Consiglio Nazionale delle Ricerche, Istituto di Ricerca sulle Acque Via F. De Blasio 5, 70123 Bari, Italy; Consiglio Nazionale delle Ricerche, Istituto di Ricerca sulle Acque, Via Reno 1, 00198 Roma, Italy With the aim to identify the reaction by products, the oxidation of four sulfur containing s trazines prometryne, terbutryne, ametryne and desmetryne by sodium hypochlorite NaClO has been investigated using oxidant and herbicides initial concentrations respectively of 11 ppm and 3 ppm. Furthermore, to study the effect of reagent concentration on the oxidation rate, only for prometryne, the reaction has been carried out at two more oxidant and herbicide initial concentrations ppm 3 and 0.003, 0.011 and 0.003. Oxidation reactions were monitored by high performance liquid chromatography HPLC , while the identification of by products was at first carried out by HPLC mass spectrometry HPLC MS and then confirmed by accurate mass measurements. The results indicate that all the investigated triazines react in the same way. In the experimental conditions T = 20 degrees C, pH = 8, reaction time = 48 h the reaction gives rise to three identified oxidation by products the sulfoxide, the sulfone and the sulfone s hydrolysis product. As expected, the lower the reagent s concentration the slower the oxidation rate. Based on the obtained results, a general pathway for the oxidation of sulfur containing s triazines is proposed. 30 OXIDATION OF SULFUR CONTAINING S TRIAZINES DURING GROUNDWATER HYPOCHLORINATION 20.pdf Articolo in rivista Pergamon Wat Sci. Tech. Wat Sci. Tech. antonio.lopez LOPEZ ANTONIO giuseppe.mascolo MASCOLO GIUSEPPE |