2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 9: Physics, Advanced Materials, Multifunctional Materials
| Editors: | Kongoli F, Dubois JM, Gaudry E, Fournee V, Marquis F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 275 pages |
| ISBN: | 978-1-987820-32-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Domestic Wastewater Treatment Using Pt,Ni-RE (Rare Earth) Electrodes
Eurico Moutinho1; Daniele Maccio2; Adriana Saccone2; Margarida Mateus1; Diogo Santos1;1INSTITUTO SUPERIOR TECNICO, UNIVERSIDADE DE LISBOA, Lisbon, Portugal; 2, Genova, Italy;
Type of Paper: Regular
Id Paper: 363
Topic: 21
Abstract:
Electrochemical technologies can be used for the treatment of domestic wastewaters, by eliminating their organic pollutants. They have advantages over conventional methods, such as environmental compatibility, versatility, energy efficiency, safety and cost. The organic compounds degradation process is based on the production of OH radicals, formed during water electrolysis, which will oxidize the organic molecules producing CO2. At the same time, hydrogen (H2) can be produced through reduction of the water in the effluent, which can be later used in a fuel cell. The present study seeks to find effective electrocatalysts to produce H2 by electrolysis, using a domestic wastewater as a hydrogen source, with or without the addition of electrolytes. Cyclic voltammetry (CV) is performed using several different cathode materials, namely platinum (Pt) and platinum-rare earth (Pt-RE) binary alloys, and nickel (Ni) and Ni-RE alloys, with the REs being cerium (Ce), samarium (Sm), dysprosium (Dy), and holmium (Ho). CV measurements are conducted at different temperatures, ranging between 25 and 85 ºC. KOH was selected for electrolyte, as the extra hydroxide can be used to degrade the organic matter. The data obtained for the hydrogen evolution reaction (HER) at the different electrode materials is compared. It is noticeable that the effluent containing the KOH additive leads to significantly better performances.
Keywords:
domestic wastewater; hydrogen evolution reaction; platinum; nickel; rare earth alloysReferences:
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