Development Of Fenton-Like Reagents For The Degradation Of Phthalate Esters

Ariwoola O. S. (), Ogunbamowo P. O, Awotedu O. L and O. O Adeniyi
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Ariwoola O. S.: Federal College of Forestry, P.M.B. 5087, Jericho Hill, Ibadan, Oyo State, Nigeria
Ogunbamowo P. O: Forestry Research Institute of Nigeria, P.M.B 5054 Jericho Hills, Ibadan, Oyo State, Nigeria
Awotedu O. L: Forestry Research Institute of Nigeria, P.M.B 5054 Jericho Hills, Ibadan, Oyo State, Nigeria.
O. O Adeniyi: Montane Forest Research Station, FRIN P.M.B. 2019, Jos, Plateau State. Nigeria.

Journal Clean WAS (JCleanWAS), 2020, vol. 4, issue 2, 66-69

Abstract: This study involved the development of Fenton- like reagents (Mn2+/H2O2 and Cr2+/H2O2) for the degradation of phthalates esters – dimethyl phthalates (DMP), diethyl phthalates (DEP) and diphenyl phthalate (DPP). The degradation efficiency of phthalate esters (initial concentration of 20 mgL-1) by the newly developed reagents was conducted at different time intervals, the pH was adjusted to 3.0, the reaction mixtures were extracted and analysed by High-Performance Liquid Chromatography (HPLC). The H2O2 concentration was set at 100 mgL-1, and 10 mgL-1 for both Mn2+ and Cr3+. The results showed that the reagent, Mn2+/H2O2 degraded DMP completely within 20 minutes of the experiment, while 3.0 mgL-1 of DEP and 4.88 mgL-1 of DPP remained. At 30 minutes, DEP was found to be completely degraded with 4.84 mgL-1 of DPP remaining. In the same vein, the second reagent (Cr2+/H2O2) recorded 100 % efficiency on DMP within 20 minutes while that of DEP did not reach 100 % efficiency until 60 minutes. In this case, the reaction time of 20 mgL-1 DMP and DEP with this reagent is 20 minutes and 60 minutes respectively. Furthermore, it could be deduced that 30minutes is sufficient for complete degradation of 20 mgL-1 DMP and 20 mgL-1 DEP with Mn2+/H2O2 reagent while the degradation of 20 mgL-1 DPP took 60 minutes. For Cr3+/H2O2 reagent, the reaction time for the complete degradation of DMP and DEP was 30 and 60 minutes respectively. These newly developed reagents Mn2+/H2O2 and Cr2+/H2O2 are very effective and efficient for the degradation of phthalate esters thus, recommended for the degradation of liquid wastes containing these hazardous compounds.

Keywords: Advanced oxidation process; Fenton-like reagents; Dimethyl phthalates (DMP); Diethyl phthalates (DEP) and Diphenyl phthalate (DPP). (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:zib:jclnws:v:4:y:2020:i:2:p:66-69

DOI: 10.26480/jcleanwas.02.2020.66.69

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