E3S Web Conf.
Volume 86, 2019The First International Scientific Conference on Ecological and Environmental Engineering 2018
|Number of page(s)||5|
|Published online||22 February 2019|
The effect of sodium percarbonate dose on the reduction of organic compounds in landfill leachate
1 Kielce University of Technology, Faculty of the Environmental Engineering, Geomatics and Energy, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland
2 Warsaw University of Technology Branch in Plock, Faculty of Civil Engineering, Mechanics and Petrochemistry, ul. Łukasiewicza 17, 09-400, Płock, Poland
* Corresponding author: firstname.lastname@example.org
The paper discusses the issue of using classic Fenton’s reagent modification for pre-treatment of leachate from a landfill in Janczyce (Świętokrzyskie Voivodeship, Poland) – sodium percarbonate (2Na2CO3·3H2O2) was used as an alternative source of hydrogen peroxide, and hydrated iron sulphate ((II) FeSO4·7H2O) was the source of iron ions. The tests were carried out at initial process pH = 3, for different doses of the Fe2+ catalyst (ranging within 100÷5400 mgFe/L), and for mass ratio iron (II) to sodium percarbonate – 1:3. Three doses were selected after this stage, for which the following parameters were examined: the effect of initial process pH ranging between 2 and 4, the effect of oxidation process duration (30÷150 min.), and the effect of the ratio Fe2+ to sodium percarbonate (1:3, 1:5 and 1:7). The values of selected parameters (pH, COD, TOC) in leachates, both before and after the treatment process have been determined according to applicable standards. Completed tests have proven, inter alia, that the proposed implementation of the Fenton’s method with sodium percarbonate may be an effective alternative for hydrogen peroxide as an oxidiser; with an increasing dose of the 2Na2CO3.3H2O2, the improvement in landfill leachate remediation efficiency measured by decreasing TOC and COD values reaches certain extent only; the process modified with sodium percarbonate may be effective already at pH=4.
© The Authors, published by EDP Sciences, 2019
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