Performance of the Persulfate/UV-C Process for the Treatment of Dimethyl Phthalate from Aquatic Environments
Phthalate esters (PAEs) are used as plasticizers to impart flexibility and resilience to plastic products. In recent years, PAEs are a controversial issue because many phthalates are suspected to be mutagens, hepatotoxic agents and endocrine disruptors, and can lead to adverse effects on organisms...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IJEGEO
2018-08-01
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| Series: | International Journal of Environment and Geoinformatics |
| Subjects: | |
| Online Access: | http://dergipark.gov.tr/download/article-file/504737 |
| _version_ | 1797905766792822784 |
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| author | Tuğba Ölmez-Hancı İdil Arslan-Alaton Ceren İmren |
| author_facet | Tuğba Ölmez-Hancı İdil Arslan-Alaton Ceren İmren |
| author_sort | Tuğba Ölmez-Hancı |
| collection | DOAJ |
| description | Phthalate esters (PAEs) are used as plasticizers to impart flexibility and resilience to plastic products. In recent
years, PAEs are a controversial issue because many phthalates are suspected to be mutagens, hepatotoxic agents
and endocrine disruptors, and can lead to adverse effects on organisms even in a low concentration. Recently,
sulfate (SO4
-
) radical based advanced oxidation processes have attracted great scientific interest due to their high
efficiency in the degradation and mineralization of recalcitrant and/or toxic organic pollutants. In the present study
aqueous dimethyl phthalate (DMP; 100 mg L-1), being selected as a model PAE, was treated by the persulfate
(PS)/UV-C process at pH 3 and varying PS concentrations (0-60 mM). DMP and TOC abatements increased with
increasing PS concentrations from 5 to 40 mM. Further increase in the initial PS concentration, however, reduced
both the rate and extent of DMP and TOC removals. The highest pseudo-first-order abatement rate coefficient and
electrical energy per order (EE/O) values obtained for DMP treatment with PS/UV-C oxidation were found as
0.4493 min-1 and 1.79 kWh m-3 order-1, respectively, for PS = 30 mM, pH = 3, DMP = 100 mg L-1. The secondorder
reaction rate coefficient for DMP with SO4
-
was determined as 1.47×109
M-1s
-1 by the application of
competition kinetics using phenol as the probe compound. Within the scope of the present study, aqueous DMP
was also subjected to peroxymonosulfate (PMS)/UV-C and hydrogen peroxide (HP)/UV-C treatments. The
performance of PS/UV-C treatment was found to be higher than that of PMS/UV-C and HP/UV-C treatments both
in terms of DMP and TOC abatement rates at an initial oxidant concentration of 5 mM. |
| first_indexed | 2024-04-10T10:10:28Z |
| format | Article |
| id | doaj.art-b7f725e62ede4dad920cb8309f8a4a19 |
| institution | Directory Open Access Journal |
| issn | 2148-9173 2148-9173 |
| language | English |
| last_indexed | 2024-04-10T10:10:28Z |
| publishDate | 2018-08-01 |
| publisher | IJEGEO |
| record_format | Article |
| series | International Journal of Environment and Geoinformatics |
| spelling | doaj.art-b7f725e62ede4dad920cb8309f8a4a192023-02-15T16:22:13ZengIJEGEOInternational Journal of Environment and Geoinformatics2148-91732148-91732018-08-015218919610.30897/ijegeo.425436Performance of the Persulfate/UV-C Process for the Treatment of Dimethyl Phthalate from Aquatic EnvironmentsTuğba Ölmez-Hancı0 İdil Arslan-Alaton1Ceren İmren2Istanbul Technical University, Environmental Engineering Department, 34469 Maslak, Istanbul, Turkey Istanbul Technical University, Environmental Engineering Department, 34469 Maslak, Istanbul, Turkey Istanbul Technical University, Environmental Engineering Department, 34469 Maslak, Istanbul, Turkey Phthalate esters (PAEs) are used as plasticizers to impart flexibility and resilience to plastic products. In recent years, PAEs are a controversial issue because many phthalates are suspected to be mutagens, hepatotoxic agents and endocrine disruptors, and can lead to adverse effects on organisms even in a low concentration. Recently, sulfate (SO4 - ) radical based advanced oxidation processes have attracted great scientific interest due to their high efficiency in the degradation and mineralization of recalcitrant and/or toxic organic pollutants. In the present study aqueous dimethyl phthalate (DMP; 100 mg L-1), being selected as a model PAE, was treated by the persulfate (PS)/UV-C process at pH 3 and varying PS concentrations (0-60 mM). DMP and TOC abatements increased with increasing PS concentrations from 5 to 40 mM. Further increase in the initial PS concentration, however, reduced both the rate and extent of DMP and TOC removals. The highest pseudo-first-order abatement rate coefficient and electrical energy per order (EE/O) values obtained for DMP treatment with PS/UV-C oxidation were found as 0.4493 min-1 and 1.79 kWh m-3 order-1, respectively, for PS = 30 mM, pH = 3, DMP = 100 mg L-1. The secondorder reaction rate coefficient for DMP with SO4 - was determined as 1.47×109 M-1s -1 by the application of competition kinetics using phenol as the probe compound. Within the scope of the present study, aqueous DMP was also subjected to peroxymonosulfate (PMS)/UV-C and hydrogen peroxide (HP)/UV-C treatments. The performance of PS/UV-C treatment was found to be higher than that of PMS/UV-C and HP/UV-C treatments both in terms of DMP and TOC abatement rates at an initial oxidant concentration of 5 mM.http://dergipark.gov.tr/download/article-file/504737Dimethyl phthalateEndocrine disrupting compoundReaction kineticsSulfate radical |
| spellingShingle | Tuğba Ölmez-Hancı İdil Arslan-Alaton Ceren İmren Performance of the Persulfate/UV-C Process for the Treatment of Dimethyl Phthalate from Aquatic Environments International Journal of Environment and Geoinformatics Dimethyl phthalate Endocrine disrupting compound Reaction kinetics Sulfate radical |
| title | Performance of the Persulfate/UV-C Process for the Treatment of Dimethyl Phthalate from Aquatic Environments |
| title_full | Performance of the Persulfate/UV-C Process for the Treatment of Dimethyl Phthalate from Aquatic Environments |
| title_fullStr | Performance of the Persulfate/UV-C Process for the Treatment of Dimethyl Phthalate from Aquatic Environments |
| title_full_unstemmed | Performance of the Persulfate/UV-C Process for the Treatment of Dimethyl Phthalate from Aquatic Environments |
| title_short | Performance of the Persulfate/UV-C Process for the Treatment of Dimethyl Phthalate from Aquatic Environments |
| title_sort | performance of the persulfate uv c process for the treatment of dimethyl phthalate from aquatic environments |
| topic | Dimethyl phthalate Endocrine disrupting compound Reaction kinetics Sulfate radical |
| url | http://dergipark.gov.tr/download/article-file/504737 |
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