{"type": "FeatureCollection", "features": [{"id": "10.1016/j.ese.2020.100013", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:16:16Z", "type": "Journal Article", "created": "2020-01-13", "title": "Microbial electrochemistry for bioremediation", "description": "Lack of suitable electron donors or acceptors is in many cases the key reason for pollutants to persist in the environment. Externally supplementation of electron donors or acceptors is often difficult to control and/or involves chemical additions with limited lifespan, residue formation or other adverse side effects. Microbial electrochemistry has evolved very fast in the past years - this field relates to the study of electrochemical interactions between microorganisms and solid-state electron donors or acceptors. Current can be supplied in such so-called bioelectrochemical systems (BESs) at low voltage to provide or extract electrons in a very precise manner. A plethora of metabolisms can be linked to electrical current now, from metals reductions to denitrification and dechlorination. In this perspective, we provide an overview of the emerging applications of BES and derived technologies towards the bioremediation field and outline how this approach can be game changing.", "keywords": ["0301 basic medicine", "AUTOTROPHIC DENITRIFICATION", "elecetrobioremediation", "Bioremediaci\u00f3", "FUEL-CELLS", "Environmental technology. Sanitary engineering", "Microbial biotechnology", "01 natural sciences", "POLYCYCLIC AROMATIC-HYDROCARBONS", "03 medical and health sciences", "WASTE-WATER", "DECHLORINATION", "TD Environmental technology. Sanitary engineering", "Electrochemistry", "POLLUTANTS", "GE1-350", "TD1-1066", "0105 earth and related environmental sciences", "NITRATE-CONTAMINATED GROUNDWATER", "ENVIRONMENTAL REMEDIATION", "Q Science (General)", "QR Microbiology", "NITROGEN REMOVAL", "6. 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Climate action", "Earth and Environmental Sciences", "Perspective", "Biotecnologia microbiana", "Bioremediation"]}, "links": [{"href": "https://iris.cnr.it/bitstream/20.500.14243/540323/1/1-s2.0-S2666498420300053-main.pdf"}, {"href": "https://doi.org/10.1016/j.ese.2020.100013"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20and%20Ecotechnology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.ese.2020.100013", "name": "item", "description": "10.1016/j.ese.2020.100013", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.ese.2020.100013"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-01-01T00:00:00Z"}}, {"id": "10.1021/acs.est.1c03586", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:17:29Z", "type": "Journal Article", "created": "2021-11-02", "title": "Impact of Periodic Polarization on Groundwater Denitrification in Bioelectrochemical Systems.", "description": "Nitrate contamination is a common problem in groundwater around the world. Nitrate can be cathodically reduced in bioelectrochemical systems using autotrophic denitrifiers with low energy investment and without chemical addition. Successful denitrification was demonstrated in previous studies in both microbial fuel cells and microbial electrolysis cells (MECs) with continuous current flow, whereas the impact of intermittent current supply (e.g., in a fluidized-bed system) on denitrification and particularly the electron-storing capacity of the denitrifying electroactive biofilms (EABs) on the cathodes have not been studied in depth. In this study, two continuously fed MECs were operated in parallel under continuous and periodic polarization modes over 280 days, respectively. Under continuous polarization, the maximum denitrification rate reached 233 g NO3--N/m3/d with 98% nitrate removal (0.6 mg NO3--N/L in the effluent) with negligible intermediate production, while under a 30 s open-circuit/30 s polarization mode, 86% of nitrate was removed at a maximum rate of 205 g NO3--N/m3/d (4.5 mg NO3--N/L in the effluent) with higher N2O production (6.6-9.3 mg N/L in the effluent). Conversely, periodic polarization could be an interesting approach in other bioelectrochemical processes if the generation of chemical intermediates (partially reduced or oxidized) should be favored. Similar microbial communities dominated byGallionellaceaewere found in both MECs; however, swapping the polarization modes and the electrochemical analyses suggested that the periodically polarized EABs probably developed a higher ability for electron storage and transfer, which supported the direct electron transfer pathway in discontinuous operation or fluidized biocathodes.", "keywords": ["bioelectrochemical systems (BESs)", "periodic polarization", "Autotrophic Processes", "Technology and Engineering", "denitrification", "Nitrates", "AUTOTROPHIC DENITRIFICATION", "EABs", "Bioelectric Energy Sources", "NITRATE-CONTAMINATED GROUNDWATER", "02 engineering and technology", "6. Clean water", "REDUCTION", "REMOVAL", "13. 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