Electro‐Fenton Oxidation of Salicylic Acid from Aqueous Solution: Batch Studies and Degradation Pathway

Wiley - Tập 42 Số 12 - Trang 1701-1711 - 2014
Stephy Jacqueline George1, R. Gandhimathi1, P.V. Nidheesh1, S. T. Ramesh1
1National Institute of Technology, Tiruchirappalli - Tamil Nadu, India

Tóm tắt

This study investigated the removal of salicylic acid (SA) from aqueous solution by electro‐Fenton (EF) and EF‐like processes using graphite–graphite electrolytic system. Fe0, Fe2+, Fe3+ ions were used as the Fenton reagent in the EF process and in the EF‐like reactions, Cu2+, Mn2+, Ni2+ were used as the same. The effect of various operating conditions on the effectiveness of EF process was investigated. The contribution of adsorption and electro‐sorption in the removal of SA was also investigated. According to the results, EF method can be used efficiently for the removal of SA by maintaining proper operating conditions. Fe2+ was confirmed to be the most efficient catalyst among the metal ions that were tested. Maximum removal efficiency of 75.13% was obtained under optimal operating conditions after 8 h of electrolysis. Even though EF‐like processes are also effective for the removal of SA from aqueous solutions, EF removal of SA was observed to be more efficient for the same. Gas chromatography–mass spectrometry (GC‐MS) of SA solutions electrolyzed at optimal conditions was carried out. Degradation pathway was proposed from GC–MS.

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Tài liệu tham khảo

10.1016/j.watres.2007.07.046

10.1016/j.aquatox.2005.09.009

10.1016/j.chemosphere.2004.11.090

10.1016/j.watres.2006.12.017

10.1016/j.jhazmat.2005.03.001

10.1016/j.watres.2007.01.004

10.1016/j.chroma.2006.07.033

10.1007/s00216-010-4441-x

10.1590/S1517-83822007000100009

10.1007/BF00201815

10.1023/A:1002824721597

Mandavgane S. A., 2011, Degradation of Salicylic Acid by UV, UV/H2O2, UV/O3, Photofenton Processes, Rasayan J. Chem., 4, 640

10.1016/j.cej.2011.01.065

10.1016/j.jhazmat.2008.04.119

Sankara Narayanan T. S. N., 2003, Degradation of o‐Chlorophenol from Aqueous Solution by Electro‐Fenton Process, Fresenius Environ. Bull., 12, 776

10.1016/j.desal.2009.11.020

Babu B. R., 2011, Removal of Pesticides from Wastewater by Electrochemical Methods – a Comparative Approach, Sust. Environ. Res., 21, 401

10.1016/j.jhazmat.2005.11.025

10.1016/j.jhazmat.2009.03.048

10.1002/clen.200700091

10.1016/j.jhazmat.2006.02.069

10.1016/j.watres.2008.10.028

10.1021/i260025a022

10.1149/1.1553790

10.1016/j.reactfunctpolym.2004.02.024

10.1016/j.cej.2004.01.031

10.1016/j.cej.2008.01.018

10.1016/j.jhazmat.2011.10.079

10.1002/clen.201200521

10.1016/j.desal.2011.05.004

10.1016/j.jelechem.2008.01.002

10.1080/19443994.2013.790321

10.1016/j.jhazmat.2008.06.047

10.1016/0926-3373(93)80070-T

10.1016/j.jhazmat.2009.09.009

10.1021/es020874g

10.1016/j.scitotenv.2007.06.030

10.1021/es00006a012

Min Z. W., 2009, Accelerated Effect of Ferric Salts on Degradation of Thiophosphate Fungicide, Tolclofos‐Methyl by Zerovalent Iron, Appl. Biol. Chem., 52, 681

10.1016/j.jelechem.2007.07.004

10.1016/S0043-1354(00)00364-X

10.1016/S0304-3894(02)00282-0

10.1016/j.seppur.2007.04.021

10.1016/j.chemosphere.2004.09.091

10.1016/S0043-1354(01)00235-4

10.1016/j.desal.2012.05.011

10.1016/S0043-1354(02)00103-3

10.1016/S0043-1354(02)00461-X

10.1016/j.jhazmat.2008.06.067

10.1631/jzus.2007.A1118

10.1016/j.apcata.2003.10.025

10.1021/j100380a051

10.1016/S0926-3373(98)00116-7

Whebi D. J., 2010, Influence of Certain Inorganic Ions and Ligands on Degradation of Methyl Red by Fenton's Reagent, J. Univ. Chem. Technol. Metall., 45, 303

10.1016/j.dyepig.2007.04.002

10.1021/cr9001319

10.1016/j.chemosphere.2006.06.033

10.1016/S0043-1354(01)00135-X

10.1021/cr900136g

10.1016/j.jelechem.2007.12.005

10.1016/S0045-6535(01)00312-5

Jiang L., 2012, Degradation of Phenol‐Containing Wastewater Using an Improved Electro‐Fenton Process, Int. J. Electrochem. Sci., 7, 4078, 10.1016/S1452-3981(23)19521-6

E. G.Garrido‐Ramirez PhD Thesis Universidad De La Frontera Chile2011.

10.1016/j.cattod.2007.03.041

10.1016/j.apcatb.2003.11.005

10.1021/jp1062836

10.1021/jf900876x