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Kinetic investigations of quinoline oxidation by ferrate(VI).
Environ Technol. 2016; 37(10):1249-56.ET

Abstract

Quinoline is considered as one of the most toxic and carcinogenic compounds and is commonly found in industrial wastewaters, which require treatment before being discharged. Removal of quinoline by the use of an environmentally friendly oxidant, potassium ferrate(VI) (K2FeO4), was assessed by studying the kinetics of the oxidation of quinoline by ferrate(VI) (Fe(VI)) as a function of pH (8.53-10.53) and temperature (21-36°C) in this work. The reaction of quinoline with Fe(VI) was found to be first order in Fe(VI), half order in quinoline, and 1.5 order overall. The observed rate constant at 28°C decreased non-linearly from 0.5334 to 0.2365 M(-0.5) min(-1) with an increase in pH from 8.53 to 10.03. Considering the equilibria of Fe(VI) and quinoline, the reaction between quinoline and Fe(VI) contained two parallel reactions under the given pH conditions. The individual rate constants of these two reactions were determined. The results indicate that the protonated species of Fe(VI) reacts more quickly with quinoline than the deprotonated form of Fe(VI). The reaction activation energy Ea was obtained to be 51.44 kJ·mol(-1), and it was slightly lower than that of conventional chemical reaction. It reveals that the oxidation of quinoline by Fe(VI) is feasible in the routine water treatment.

Authors+Show Affiliations

a School of Chemistry and Chemical Engineering , Chongqing University , Chongqing , People's Republic of China.a School of Chemistry and Chemical Engineering , Chongqing University , Chongqing , People's Republic of China.b Key Laboratory of the Three Georges Reservoir Region's Eco-Environments of Ministry of Education , Chongqing University , Chongqing , People's Republic of China.

Pub Type(s)

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

Language

eng

PubMed ID

26507702

Citation

Luo, Zhiyong, et al. "Kinetic Investigations of Quinoline Oxidation By Ferrate(VI)." Environmental Technology, vol. 37, no. 10, 2016, pp. 1249-56.
Luo Z, Li X, Zhai J. Kinetic investigations of quinoline oxidation by ferrate(VI). Environ Technol. 2016;37(10):1249-56.
Luo, Z., Li, X., & Zhai, J. (2016). Kinetic investigations of quinoline oxidation by ferrate(VI). Environmental Technology, 37(10), 1249-56. https://doi.org/10.1080/09593330.2015.1111424
Luo Z, Li X, Zhai J. Kinetic Investigations of Quinoline Oxidation By Ferrate(VI). Environ Technol. 2016;37(10):1249-56. PubMed PMID: 26507702.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Kinetic investigations of quinoline oxidation by ferrate(VI). AU - Luo,Zhiyong, AU - Li,Xueming, AU - Zhai,Jun, Y1 - 2015/12/15/ PY - 2015/10/29/entrez PY - 2015/10/29/pubmed PY - 2016/11/9/medline KW - Ferrate(VI) KW - kinetics KW - oxidation KW - quinoline KW - water treatment SP - 1249 EP - 56 JF - Environmental technology JO - Environ Technol VL - 37 IS - 10 N2 - Quinoline is considered as one of the most toxic and carcinogenic compounds and is commonly found in industrial wastewaters, which require treatment before being discharged. Removal of quinoline by the use of an environmentally friendly oxidant, potassium ferrate(VI) (K2FeO4), was assessed by studying the kinetics of the oxidation of quinoline by ferrate(VI) (Fe(VI)) as a function of pH (8.53-10.53) and temperature (21-36°C) in this work. The reaction of quinoline with Fe(VI) was found to be first order in Fe(VI), half order in quinoline, and 1.5 order overall. The observed rate constant at 28°C decreased non-linearly from 0.5334 to 0.2365 M(-0.5) min(-1) with an increase in pH from 8.53 to 10.03. Considering the equilibria of Fe(VI) and quinoline, the reaction between quinoline and Fe(VI) contained two parallel reactions under the given pH conditions. The individual rate constants of these two reactions were determined. The results indicate that the protonated species of Fe(VI) reacts more quickly with quinoline than the deprotonated form of Fe(VI). The reaction activation energy Ea was obtained to be 51.44 kJ·mol(-1), and it was slightly lower than that of conventional chemical reaction. It reveals that the oxidation of quinoline by Fe(VI) is feasible in the routine water treatment. SN - 1479-487X UR - https://www.unboundmedicine.com/medline/citation/26507702/Kinetic_investigations_of_quinoline_oxidation_by_ferrate_VI__ L2 - https://www.tandfonline.com/doi/full/10.1080/09593330.2015.1111424 DB - PRIME DP - Unbound Medicine ER -