PMID- 15885412 OWN - NLM STAT- MEDLINE DCOM- 20051011 LR - 20121115 IS - 0304-3894 (Print) IS - 0304-3894 (Linking) VI - 121 IP - 1-3 DP - 2005 May 20 TI - A study of kinetic modelling and reaction pathway of 2,4-dichlorophenol transformation by photo-fenton-like oxidation. PG - 119-26 AB - The degradation of 2,4-dichlorophenol (2,4-DCP) by the photo-Fenton-like (Fe3+/H2O2/UVC) process under various reaction conditions was investigated. It was interesting to find that the reaction kinetics of 2,4-DCP in Fe3+/H2O2/UVC systems varied depending on the initial [Fe3+] concentration. A pseudo first-order kinetic and a non-conventional kinetic were discovered at low and higher [Fe3+] concentrations, respectively. A model was used to simulate the non-conventional kinetic process, where two character parameters (the initial decay rate and the final decay fraction) were found to be critical in determining the process. The two parameters successfully quantify the photo-Fenton-like oxidation under different concentrations of [Fe3+] and [H2O2] and the corresponding ratios of Fe(III)/H2O2. The reaction intermediates were identified by an LC/MS analysis and a reaction mechanism was proposed. FAU - Chu, W AU - Chu W AD - Department of Civil and Structural Engineering, Research Centre for Environmental Technology and Management, The Hong Kong Polytechnic University, Hunghom, Kowloon, Hong Kong. cewchu@polyu.edu.hk FAU - Kwan, C Y AU - Kwan CY FAU - Chan, K H AU - Chan KH FAU - Kam, S K AU - Kam SK LA - eng PT - Journal Article PL - Netherlands TA - J Hazard Mater JT - Journal of hazardous materials JID - 9422688 RN - 0 (Chlorophenols) RN - R669TG1950 (2,4-dichlorophenol) SB - IM MH - Chlorophenols/*chemistry MH - Kinetics MH - *Models, Chemical MH - Oxidative Phosphorylation MH - Photolysis EDAT- 2005/05/12 09:00 MHDA- 2005/10/12 09:00 CRDT- 2005/05/12 09:00 PHST- 2004/11/30 00:00 [received] PHST- 2005/01/27 00:00 [revised] PHST- 2005/01/31 00:00 [accepted] PHST- 2005/05/12 09:00 [pubmed] PHST- 2005/10/12 09:00 [medline] PHST- 2005/05/12 09:00 [entrez] AID - S0304-3894(05)00052-X [pii] AID - 10.1016/j.jhazmat.2005.01.019 [doi] PST - ppublish SO - J Hazard Mater. 2005 May 20;121(1-3):119-26. doi: 10.1016/j.jhazmat.2005.01.019.