Exploring magnetism as a way to decontaminate wastewater and leacheates

• Type: International Conference Proceedings Book
• Date: 2017-11-26

Authors

barbosa, d (Author) FEUP; augusto, pa (Author) FEUP; Teresa Augusto (Author) FEUP; paz, e. (Author) Other; rico, j. (Author) Other; iglesias, r. (Author) Other; marcos, j. (Author) Other; merchán, l. (Author) Other; estévez, a.m. (Author) Other

Conference International

18th European Meeting on Environmental Chemistry, EMEC18

Porto, Portugal, 26-11-2017

Scientific classification

CORDIS: Technological sciences > Engineering > Chemical engineering

FOS: Engineering and technology > Chemical engineering ; Engineering and technology > Environmental engineering

Associated Projects

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

LEPABE-2-ECO-INNOVATION - LEPABE-2-ECO-INNOVATION

Other information

Subject: Exploring magnetism as a way to decontaminate wastewater and leacheates

Abstract (EN): The treatment of leachates as pollutant concentrated wastewaters, is still an open issue, and although several different methods are applied for this goal, we are still far away from obtaining low-cost and at the same time efficient processes. Even for wastewater and water, removal of specific contaminants is far from being economical. Magnetic particles (nano and micron-sized), namely those based on iron oxides, have shown good sorption capabilities, which may be useful for removal/concentration of pollutants/nutrients. Joining this sorption capabilities with their magnetic properties, and with potential functionalization, makes the application of these particles for wastewater or leachate treatment very interesting, specially as we may use magnetic separation methods to further remove, recover and reuse these particles. In this work we have tested three different kind of magnetic particles, in order to remove/concentrate organic matter (COD reduction), nitrogen (total nitrogen) and phosphorous (total phosphorous), during several time periods, being successful in removing between 4 and 65% of them, depending on the controlled parameter, sorption time and type of particle. We have applied the same particles in three different water streams with different degrees of pollution, so we would be able to analyze the pollutant concentration influence; these being water, wastewater and leachate. In Figure 1 we present as example the case of removal for wastewater resultant from sludge centrifugation, by one of the three different magnetic particle systems we have used.

Type (Professor's evaluation): Scientific