Electrochemical removal of Bisphenol A from landfill leachate under Nordic climate conditions
- PDF / 2,189,756 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 39 Downloads / 255 Views
RESEARCH ARTICLE
Electrochemical removal of Bisphenol A from landfill leachate under Nordic climate conditions Noëmi Ambauen1 · Clara Weber1 · Jens Muff2 · Cynthia Hallé1 · Thomas Meyn1 Received: 2 May 2020 / Accepted: 1 September 2020 © The Author(s) 2020
Abstract This study investigated the applicability of electrochemical oxidation for landfill leachate treatment in climate areas, where cold temperatures prevail (like Northern Norway). Experiments were completed with pre-treated (coagulation/flocculation and separation) landfill leachate at 6 and 20 °C in order to assess the temperature influence on the degradation of the organic pollutant Bisphenol A and the fate of the ordinary wastewater parameters COD and nitrate. Furthermore, two different anode materials (Ti/Pt and Nb/BDD) and three different current densities (10, 43 and 86 mA cm −2) were compared. Additionally, the formation of the two groups of disinfection by-products, trihalomethanes and perchlorate, was monitored. A 99% removal of Bisphenol A was confirmed at 6 °C on both tested anode materials, but a current density of at least 43 mA cm−2 must be applied. Removal rates were on average 38% slower at 6 °C than at 20 °C. For comparison, Bisphenol A removal in clean electrolyte disclosed faster degradation rates (between 50 and 68%) due to absent landfill leachate matrix effects. The energy consumption for 99% Bisphenol A removal was 0.28 to 1.30 kWh m−3, and was on average 14% higher at 6 °C compared to 20 °C. Trihalomethanes were mainly formed on Pt anodes in the ppb range, while perchlorate was primarily formed at BDD anodes in the ppm range. Formation of disinfection by-products increased with increased applied current and temperature. Electrochemical oxidation was found to be a suitable treatment process for landfill leachate in cold climate areas by successfully meeting treatment goals.
* Noëmi Ambauen [email protected] Clara Weber [email protected] Jens Muff [email protected] Cynthia Hallé [email protected] Thomas Meyn [email protected] 1
Department of Civil‑ and Environmental Engineering, Norwegian University of Science and Technology, S.P. Andersens Veg 5, Trondheim, Norway
Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8, Esbjerg, Denmark
2
13
Vol.:(0123456789)
Journal of Applied Electrochemistry
Graphic abstract
Keywords Bisphenol A · Applied current · Temperature · Energy consumption · Disinfection by-products · Organic pollutants
1 Introduction Several advanced oxidation processes (AOPs) have been assessed for their suitability to treat different kind of wastewaters. Among AOPs, electrochemical oxidation (EO) has gained great attention because large amounts of water can be treated, no residual waste is produced, and no addition of chemicals is needed [1]. Several studies investigated the performance of EO to remove common wastewater parameters form landfill leachate (LL). For instance, Panizza et al. [2] successfully removed chemical oxygen demand (COD) from LL to below the disposal
Data Loading...
