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Assessing alcohol consumption through wastewater-based epidemiology: Spain as a case study
No full textOccurrence, Fate and Fluxes of Plastics and Microplastics in Terrestrial and Freshwater Ecosystems
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A Groundwater Model for the Lake Chad Basin. Integrating data and understanding of water resources at the basin scale. A Cooperation for International Waters in Africa (CIWA)
No full textNitrate-Selective Anion Exchange Membranes Prepared using Discarded Reverse Osmosis Membranes as Support
No full textThe present work shows a methodology for the preparation of membranes with a high affinity for nitrates. For this purpose, a polymeric mixture containing an anion exchange resin was extended on a recycled pressure filtration membrane used as mechanical support. Different ion exchange resins were tested. The influence in ion fractionation of (i) the type of ion exchange resin, (ii) the use of a recycled membrane as support and (iii) the operating current density during the separation process were studied. Results revealed that the employed anion exchange resin could tune up the transport numbers of the anions in the membrane and enhance the transport of nitrates over sulfates. The use of the recycled filtration membrane as support further increased the transport of nitrates in detriment of sulfates in nitrate-selective membranes. Moreover, it considerably improved the mechanical stability of the membranes. Lowering the operational current density also boosted ion fractionation. In addition, the use of recycled membranes as support in membrane preparation is presented as an alternative management route of discarded reverse osmosis membranes, coupling with the challenging management of waste generated by the desalination industry. These membranes could be used for nitrate recovery from wastewater or for nitrate separation from groundwater
iMETland, una nueva generación de humedales electroactivos para el tratamiento de aguas residuales en pequeñas poblaciones
No full textLas aguas residuales urbanas recogen la mayor parte de los desechos
orgánicos generados por la acción humana. Para reducir el impacto de la contaminación sobre el ambiente (ríos, acuíferos, suelos, etc.) se requiere un tratamiento efectivo antes de su vertido
Chapter 13 - Metals recovery from wastewater by microbial electrochemical technologies
No full textMicrobial electrochemical technologies (METs) are novel technologies that enable metal recovery from many different wastewater streams. This chapter describes how microbes can interact with metal ions for both metabolic and recovery purposes. Electroactive bacteria can donate electrons extracellularly to metal ions and electrodes. This ability allows the construction of microbial electrochemical devices to recover metal from polluted wastewaters. These devices can remove organic matter in the anodic compartment while simultaneously reducing metals in the cathodic compartment. This chapter explains the fundamentals of this technology and several factors to take into consideration before designing an experiment. A list of different metal recovery systems targeting metals of industrial and economic relevance are described herein. METs are a real and viable alternative to current technologies, and the field of microbial electrochemical metallurgy (MEM) is continually growing. In comparison to conventional technologies, MEM can offer energy-free and carbon-neutral ways to recover metals. Furthermore, valuable commodities can be produced by microbes using complexation, precipitation, and nanoparticle formation. In all, this chapter shows that the future of metal recovery and conversion is bright with MET and MEM