Tags

Type your tag names separated by a space and hit enter

Oxidation of diclofenac by potassium ferrate (VI): reaction kinetics and toxicity evaluation.
Sci Total Environ. 2015 Feb 15; 506-507:252-8.ST

Abstract

The reaction kinetics and toxicity of diclofenac (DCF) oxidation by ferrate (VI) under simulated water disinfection conditions were investigated. Experimental results indicated that the reaction between DCF and Fe(VI) followed first-order kinetics with respect to each reactant. Furthermore, the effects of pH and temperature on DCF oxidation by Fe(VI) were elucidated using a systematic examination. The apparent second-order rate constants (kapp) increased significantly from 2.54 to 11.6M(-1)s(-1), as the pH of the solution decreased from 11.0 to 7.0, and the acid-base equilibriums of Fe(VI) and DCF were proposed to explain the pH dependence of kapp. The acute toxicity of DCF solution during Fe(VI) oxidation was evaluated using a Microtox bioassay. Overall, the DCF degradation process resulted in a rapid increase of the inhibition rate of luminescent bacteria. These toxicity tests suggest that the formation of enhanced toxic intermediates during the Fe(VI) disinfection process may pose potential health risk to consumers.

Authors+Show Affiliations

School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, PR China; School of Basic Medicine, Xinxiang Medical University, Xinxiang 453003, PR China.School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, PR China.School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, PR China; Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China. Electronic address: liugg@gdut.edu.cn.School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, PR China.School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, PR China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25460958

Citation

Wang, Yingling, et al. "Oxidation of Diclofenac By Potassium Ferrate (VI): Reaction Kinetics and Toxicity Evaluation." The Science of the Total Environment, vol. 506-507, 2015, pp. 252-8.
Wang Y, Liu H, Liu G, et al. Oxidation of diclofenac by potassium ferrate (VI): reaction kinetics and toxicity evaluation. Sci Total Environ. 2015;506-507:252-8.
Wang, Y., Liu, H., Liu, G., Xie, Y., & Gao, S. (2015). Oxidation of diclofenac by potassium ferrate (VI): reaction kinetics and toxicity evaluation. The Science of the Total Environment, 506-507, 252-8. https://doi.org/10.1016/j.scitotenv.2014.10.114
Wang Y, et al. Oxidation of Diclofenac By Potassium Ferrate (VI): Reaction Kinetics and Toxicity Evaluation. Sci Total Environ. 2015 Feb 15;506-507:252-8. PubMed PMID: 25460958.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxidation of diclofenac by potassium ferrate (VI): reaction kinetics and toxicity evaluation. AU - Wang,Yingling, AU - Liu,Haijin, AU - Liu,Guoguang, AU - Xie,Youhai, AU - Gao,Shuyan, Y1 - 2014/11/20/ PY - 2014/09/12/received PY - 2014/10/31/revised PY - 2014/10/31/accepted PY - 2014/12/3/entrez PY - 2014/12/3/pubmed PY - 2015/2/24/medline KW - Diclofenac KW - Ferrate (VI) KW - Reaction kinetics KW - Toxicity KW - Water treatment SP - 252 EP - 8 JF - The Science of the total environment JO - Sci Total Environ VL - 506-507 N2 - The reaction kinetics and toxicity of diclofenac (DCF) oxidation by ferrate (VI) under simulated water disinfection conditions were investigated. Experimental results indicated that the reaction between DCF and Fe(VI) followed first-order kinetics with respect to each reactant. Furthermore, the effects of pH and temperature on DCF oxidation by Fe(VI) were elucidated using a systematic examination. The apparent second-order rate constants (kapp) increased significantly from 2.54 to 11.6M(-1)s(-1), as the pH of the solution decreased from 11.0 to 7.0, and the acid-base equilibriums of Fe(VI) and DCF were proposed to explain the pH dependence of kapp. The acute toxicity of DCF solution during Fe(VI) oxidation was evaluated using a Microtox bioassay. Overall, the DCF degradation process resulted in a rapid increase of the inhibition rate of luminescent bacteria. These toxicity tests suggest that the formation of enhanced toxic intermediates during the Fe(VI) disinfection process may pose potential health risk to consumers. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/25460958/Oxidation_of_diclofenac_by_potassium_ferrate__VI_:_reaction_kinetics_and_toxicity_evaluation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(14)01576-9 DB - PRIME DP - Unbound Medicine ER -