Prabowo, Benedictus Veriansyah, Bambang Kim, Jae-Duck 2024-01-21T01:01:37Z 2024-01-21T01:01:37Z 2021-09-05 2007-06 1001-0742 https://pubs.kist.re.kr/handle/201004/134350 Hydrothermal decomposition of pentachlorophenol (PCP, C6HCl5O), as the probable human carcinogen, was investigated in a tubular reactor under subcritical and supercritical water with sodium hydroxide (NaOH) addition. The experiments were conducted at a temperature range of 300-420 degrees C and a fixed pressure of 25 Wa, with a residence time that ranged from 10 s to 70 s. Under the reaction conditions, the initial PCP concentrations were varied from 0.25 to 1.39 mmol/L and the NaOH concentrations were varied from 2.5 to 25 times of the concentrations of PCP. The result of this study showed that PCP conversion in supercritical water was highly dependent on the reaction temperature, residence time, and NaOH concentration. PCP conversion in subcritical water is, however, only dependent on reaction temperature. NaOH concentration and residence times were found to have little effect on PCP conversion in subcritical condition. It was found that NaOH concentration affected the dechlorinations of PCP in the supercritical water. The intermediates detected were proposed to be tetrachlorophenol and trichlorophenol, respectively. English SCIENCE PRESS OXIDATION THIODIGLYCOL KINETICS Hydrothermal decomposition of pentachlorophenol in subcritical and supercritical water with sodium hydroxide addition Article 10.1016/S1001-0742(07)60111-9 1 JOURNAL OF ENVIRONMENTAL SCIENCES, v.19, no.6, pp.663 - 666 JOURNAL OF ENVIRONMENTAL SCIENCES 19 6 663 666 scie scopus 000247251700006 2-s2.0-34249873805 Environmental Sciences Environmental Sciences & Ecology Article OXIDATION THIODIGLYCOL KINETICS pentachlorophenol hydrothermal decomposition supercritical water subcritical water