Electro-Fenton approach in oxidative degradation of dimethyl phthalate - the treatment of aqueous leachate from landfills
Authors:
- Maryam Dolatabadi,
- Tomasz Świergosz,
- Saeid Ahmadzadeh
Abstract
Herein, the dimethyl phthalate (DMP) contamination, as an emerging pollutant, has been cost-effectively removed from landfill leachate through an advanced oxidation process, that is the electro-Fenton (EF) process. For this purpose, a quadratic polynomial model was developed via response surface methodology (RSM). Furthermore, the analysis of variance (ANOVA) was performed for evaluating the significance of the proposed assumptions. The actual removal rate of 99.1% was obtained with optimal values of 4 mg L−1 of initial DMP concentration, 50 mM Na2SO4, 600 μL L−1 H2O2, 8-minute electrolytic time, solution pH 3 and 6 mA cm−2 current density for the process variables and was consistent with the expected 99.6% removal rate. Satisfactory correlation coefficients were obtained, and a non-significant value of 0.0618 for model mismatch confirmed that the proposed model is extremely important and can successfully predict the effectiveness of DMP removal. The kinetics of the process and the effect of the presence of some radical scavengers were studied to understand the exact mechanism of DMP degradation. Therefore, it was observed that the reaction of hydroxyl radicals with DMPs followed the first-order kinetics model. Moreover, it was established that the optimal ratio of H2O2/Fe2+ mole was 1.6 and the electricity consumption was 0.157 kWh m−3. The elaborated treatment model used to remove DMP from landfill leachate showed that DMP contamination was effectively removed with a 95.6% removal efficiency in the investigating process.
- Record ID
- CUT7c22367623a34f5cb7b475c6b45afae2
- Publication categories
- ;
- Author
- Journal series
- Science of the Total Environment, ISSN 0048-9697, e-ISSN 1879-1026
- Issue year
- 2021
- Vol
- 772
- Pages
- [1-9]
- Article number
- 145323
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 8-9; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 772
- Keywords in English
- electro-fenton process, dimethyl phthalate, response surface methodology, degradation, kinetics
- DOI
- DOI:10.1016/j.scitotenv.2021.145323 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0048969721003909 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 200
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT7c22367623a34f5cb7b475c6b45afae2/
- URN
urn:pkr-prod:CUT7c22367623a34f5cb7b475c6b45afae2
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.