{"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. Clean water", "Environmental sciences", "Electroqu\u00edmica", "ORGANIC", "BIOELECTROCHEMICAL SYSTEMS", "13. 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": "10.1016/j.jece.2020.104657", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:16:40Z", "type": "Journal Article", "created": "2020-10-24", "title": "Reductive/oxidative sequential bioelectrochemical process for Perchloroethylene (PCE) removal: effect of the applied reductive potential and microbial community characterization", "description": "Abstract In this paper, a bioelectrochemical process has been developed by the combination of two membrane-less reactors equipped with an internal graphite granules counterelectrode for the perchloroethylene (PCE) removal through a reductive/oxidative sequence. In the reductive reactor, the cathodic chamber supplied the reducing power to PCE dechlorinating biomass while a rutile electrode promoted the aerobic dechlorination of the less chlorinated PCE byproducts by oxygen in situ evolution. Two potentiostatic conditions, -350 and -550 mV vs SHE, were tested on the reductive reactor, which showed the capability to completely reduce the PCE into vinyl chloride (VC) and ethylene (Eth). These compounds were completely removed by the oxidative reactor with an average VC and Eth removal efficiency of 94 \u00b1 1% and 98 \u00b1 1%. The -350 mV vs SHE condition resulted in the higher coulombic efficiency for the reductive dechlorination which reached 22 \u00b1 7 % while by increasing the reductive potential to -550 mV the coulombic efficiency drop down to 6 \u00b1 1 % in favor of the methanogenesis reaction. Dehalococcoides mccartyi was found at high abundance in the reducing reactor while a heterogeneous bacterial consortium was observed in the oxidative reactor. Microbiome characterization of the reductive and oxidative reactors showed the concomitant presence of different redox niches in each compartment suggesting that the exchange of ionic species between the electrode and the counterelectrode allowed the co-existence of both reducing and oxidative reactions.", "keywords": ["0301 basic medicine", "0303 health sciences", "EC", "reductive dechlorination; oxidative dechlorination; bioremediation; bioelectrochemical systems; chlorinated aliphatic hydrocarbons; groundwater remediation", "Reductive dechlorination", "Process Chemistry and Technology", "H2020", "Pollution", "Horizon 2020 Framework Programme", "6. Clean water", "Research and Innovation action", "Bioelectrochemical systems", "03 medical and health sciences", "bioremediation", "Chemical Engineering (miscellaneous)", "European Commission", "Waste Management and Disposal"]}, "links": [{"href": "https://doi.org/10.1016/j.jece.2020.104657"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Environmental%20Chemical%20Engineering", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jece.2020.104657", "name": "item", "description": "10.1016/j.jece.2020.104657", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jece.2020.104657"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-02-01T00:00:00Z"}}, {"id": "10.1016/j.jwpe.2022.103101", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:16:45Z", "type": "Journal Article", "created": "2022-09-08", "title": "Evaluation of a bioelectrochemical reductive/oxidative sequential process for chlorinated aliphatic hydrocarbons (CAHs) removal from a real contaminated groundwater", "description": "In the present study, the sequential reductive/oxidative bioelectrochemical process has been tested with real groundwater from a contaminated site in Northern Italy for chlorinated aliphatic hydrocarbons (CAHs) removal. The sequential system was developed by connecting in series two membrane-less microbial electrolysis cells (MECs) equipped with an internal graphite counter electrode. The first MEC aimed at the CAHs reductive dechlorination (RD) and was constituted of a granular graphite working electrode. In the second MEC, a mixed metal oxide working electrode stimulated the oxidative dechlorination of the low chlorinated RD's by-products through oxygen production. The sequential process allowed complete mineralization of the CAHs contained in the real groundwater. A complete reduction of the perchloroethylene into vinyl chloride (VC) was observed in the first MEC polarized at \u2212450 mV vs SHE, while the resulting VC was oxidized with a 92 \u00b1 2 % efficiency in the second MEC due to the HRT increment from 0.7 to 1.7 days. Biomarkers of the reductive (Dehalococcoides mccartyi 16S rRNA and reductive dehalogenase genes) and oxidative (etnE, etnC genes) dechlorination have been monitored in the two MECs along with the ecotoxicity tests. Overall, they provide information on the efficiency of the applied technology and allow to assess the potential adverse effects. According to the Tetrahymena pyriformis reproduction inhibition test and Panagrellus redivivus mortality tests, showed a significant ecotoxicity reduction with respect its initial inhibitory effect at the tested concentrations.", "keywords": ["Chlorinated aliphatic hydrocarbons", "Microbial electrolysis cells", "Reductive dechlorination", "biomarkers", " chlorinated aliphatic hydrocarbons", " ecotoxicity", " microbial electrolysis cells", " oxidative dechlorination", " reductive dechlorination", "Oxidative dechlorination", "Ecotoxicity", "Biomarkers"]}, "links": [{"href": "https://iris.cnr.it/bitstream/20.500.14243/538331/1/1-s2.0-S2214714422005451-main.pdf"}, {"href": "https://iris.uniroma1.it/bitstream/11573/1655075/1/1-s2.0-S2214714422005451-main.pdf"}, {"href": "https://doi.org/10.1016/j.jwpe.2022.103101"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Water%20Process%20Engineering", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jwpe.2022.103101", "name": "item", "description": "10.1016/j.jwpe.2022.103101", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jwpe.2022.103101"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-10-01T00:00:00Z"}}, {"id": "10.1021/acsomega.1c03001", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-25T16:17:32Z", "type": "Journal Article", "created": "2021-09-22", "title": "Control of sulfate and nitrate reduction by setting hydraulic retention time and applied potential on a membraneless microbial electrolysis cell for perchloroethylene removal", "description": "A membraneless microbial electrolysis cell (MEC) has been developed for perchloroethylene (PCE) removal through the reductive dechlorination reaction. The MEC consists of a tubular reactor of 8.24 L equipped with a graphite-granule working electrode which stimulates dechlorinating microorganisms while a graphite-granule cylindrical envelopment contained in a plastic mesh constituted the counter electrode of the MEC. Synthetic PCE-contaminated groundwater has been used as the feeding solution to test the nitrate and sulfate reduction reactions on the MEC performance at different hydraulic retention times (HRTs) (4.1, 1.8, and 1.2) and different cathodic potentials [-350, -450, and -650 mV vs standard hydrogen electrode (SHE)]. The HRT decrease from 4.1 to 1.8 d promoted a considerable increase in sulfate removal from 38 \u00b1 11 to 113 \u00b1 26 mg/Ld with a consequent current increase, while a shorter HRT of 1.2 d caused a partial inhibition of sulfate reduction with a consequent current decrease from -99 \u00b1 3 to -52 \u00b1 6 mA. Similarly, the cathodic potential investigation showed a direct correlation of current generation and sulfate removal in which the utilization of a cathodic potential of -350 mV versus SHE allowed for an 80% decrease in the sulfate removal rate with a consequent current decrease from -163 \u00b1 7 to 41 \u00b1 5 mA. The study showed the possibility to mitigate the energy consumption of the process by avoiding side reactions and current generation, through the selection of an appropriate HRT and applied cathodic potential.", "keywords": ["Chemistry", "reductive dechlorination; perchloroethylene; bioelectrochemical systems; bioremediation", "QD1-999", "01 natural sciences", "7. Clean energy", "6. Clean water", "0105 earth and related environmental sciences", "12. Responsible consumption"]}, "links": [{"href": "https://iris.uniroma1.it/bitstream/11573/1570432/1/Dell%e2%80%99Armi_Control-sulfate-nitrate_2021.pdf"}, {"href": "https://pubs.acs.org/doi/pdf/10.1021/acsomega.1c03001"}, {"href": "https://doi.org/10.1021/acsomega.1c03001"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/ACS%20Omega", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/acsomega.1c03001", "name": "item", "description": "10.1021/acsomega.1c03001", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acsomega.1c03001"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-09-22T00:00:00Z"}}, {"id": "10.1111/1758-2229.13187", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:18:39Z", "type": "Journal Article", "created": "2023-07-22", "title": "Coupling the electrocatalytic dechlorination of 2,4\u2010D with electroactive microbial anodes", "description": "Abstract

This work proves the feasibility of dechlorinating 2,4\uffe2\uff80\uff90D, a customary commercial herbicide, using cathodic electrocatalysis driven by the anodic microbial electrooxidation of sodium acetate. A set of microbial electrochemical systems (MES) were run under two different operating modes, namely microbial fuel cell (MFC) mode, with an external resistance of 120\uffe2\uff80\uff89\uffce\uffa9, or microbial electrolysis cell (MEC) mode, by supplying external voltage (0.6\uffe2\uff80\uff89V) for promoting the (bio)electrochemical reactions taking place. When operating the MES as an MFC, 32% dechlorination was obtained after 72\uffe2\uff80\uff89h of treatment, which was further enhanced by working under MEC mode and achieving a 79% dechlorination. In addition, the biodegradability (expressed as the ratio BOD/COD) of the synthetic polluted wastewater was tested prior and after the MES treatment, which was improved from negative values (corresponding to toxic effluents) up to 0.135 in the MFC and 0.453 in the MEC. Our MES approach proves to be a favourable option from the point of view of energy consumption. Running the system under MFC mode allowed to co\uffe2\uff80\uff90generate energy along the dechlorination process (\uffe2\uff88\uff920.0120\uffe2\uff80\uff89kWh\uffe2\uff80\uff89mol\uffe2\uff88\uff921), even though low removal rates were attained. The energy input under MEC operation was 1.03\uffe2\uff80\uff89kWh\uffe2\uff80\uff89mol\uffe2\uff88\uff921\uffe2\uff80\uff94a competitive value compared to previous works reported in the literature for (non\uffe2\uff80\uff90biological) electrochemical reactors for 2,4\uffe2\uff80\uff90D electrodechlorination.Chlorinated aliphatic hydrocarbons (CAHs) are common groundwater contaminants due to their improper use in several industrial activities. Specialized microorganisms are able to perform the reductive dechlorination (RD) of high-chlorinated CAHs such as perchloroethylene (PCE), while the low-chlorinated ethenes such as vinyl chloride (VC) are more susceptible to oxidative mechanisms performed by aerobic dechlorinating microorganisms. Bioelectrochemical systems can be used as an effective strategy for the stimulation of both anaerobic and aerobic microbial dechlorination, i.e., a biocathode can be used as an electron donor to perform the RD, while a bioanode can provide the oxygen necessary for the aerobic dechlorination reaction. In this study, a sequential bioelectrochemical process constituted by two membrane-less microbial electrolysis cells connected in series has been, for the first time, operated with synthetic groundwater, also containing sulphate and nitrate, to simulate more realistic process conditions due to the possible establishment of competitive processes for the reducing power, with respect to previous research made with a PCE-contaminated mineral medium (with neither sulphate nor nitrate). The shift from mineral medium to synthetic groundwater showed the establishment of sulphate and nitrate reduction and caused the temporary decrease of the PCE removal efficiency from 100% to 85%. The analysis of the RD biomarkers (i.e., Dehalococcoides mccartyi 16S rRNA and tceA, bvcA, vcrA genes) confirmed the decrement of reductive dechlorination performances after the introduction of the synthetic groundwater, also characterized by a lower ionic strength and nutrients content. On the other hand, the system self-adapted the flowing current to the increased demand for the sulphate and nitrate reduction, so that reducing power was not in defect for the RD, although RD coulombic efficiency was less.

", "keywords": ["Reductive dechlorination", "oxidative dechlorination", "bioremediation", "reductive dechlorination", "01 natural sciences", "reductive dechlorination; oxidative dechlorination; bioelectrochemical systems; bioremediation", "bioelectrochemical systems", "6. Clean water", "0105 earth and related environmental sciences", "3. Good health"]}, "links": [{"href": "http://www.mdpi.com/2227-9717/9/3/405/pdf"}, {"href": "https://iris.uniroma1.it/bitstream/11573/1514918/1/Dell%e2%80%99Armi_Effects-feeding-solution_2021.pdf"}, {"href": "https://www.mdpi.com/2227-9717/9/3/405/pdf"}, {"href": "https://doi.org/10.3390/pr9030405"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Processes", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/pr9030405", "name": "item", "description": "10.3390/pr9030405", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/pr9030405"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-02-24T00:00:00Z"}}, {"id": "10.3390/w11122579", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-25T16:21:13Z", "type": "Journal Article", "created": "2019-12-06", "title": "Reductive/Oxidative Sequential Bioelectrochemical Process for Perchloroethylene Removal", "description": "

An innovative bioelectrochemical reductive/oxidative sequential process was developed and tested on a laboratory scale to obtain the complete mineralization of perchloroethylene (PCE) in a synthetic medium. The sequential bioelectrochemical process consisted of two separate tubular bioelectrochemical reactors that adopted a novel reactor configuration, avoiding the use of an ion exchange membrane to separate the anodic and cathodic chamber and reducing the cost of the reactor. In the reductive reactor, a dechlorinating mixed inoculum received reducing power to perform the reductive dechlorination of perchloroethylene (PCE) through a cathode chamber, while the less chlorinated daughter products were removed in the oxidative reactor, which supported an aerobic dechlorinating culture through in situ electrochemical oxygen evolution. Preliminary fluid dynamics and electrochemical tests were performed to characterize both the reductive and oxidative reactors, which were electrically independent of each other, with each having its own counterelectrode. The first continuous-flow potentiostatic run with the reductive reactor (polarized at \uffe2\uff88\uff92450 mV vs SHE) resulted in obtaining 100% \uffc2\uffb1 1% removal efficiency of the influent PCE, while the oxidative reactor (polarized at +1.4 V vs SHE) oxidized the vinyl chloride and ethylene from the reductive reactor, with removal efficiencies of 100% \uffc2\uffb1 2% and 92% \uffc2\uffb1 1%, respectively.

", "keywords": ["bioelectrochemical systems; bioremediation; oxidative dechlorination; reductive dechlorination", "oxidative dechlorination", "bioremediation", "reductive dechlorination", "01 natural sciences", "7. Clean energy", "bioelectrochemical systems", "6. Clean water", "0105 earth and related environmental sciences", "3. Good health"]}, "links": [{"href": "http://www.mdpi.com/2073-4441/11/12/2579/pdf"}, {"href": "https://iris.uniroma1.it/bitstream/11573/1348028/1/Zeppilli_Reductive/oxidative-sequential_2019.pdf"}, {"href": "https://www.mdpi.com/2073-4441/11/12/2579/pdf"}, {"href": "https://doi.org/10.3390/w11122579"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Water", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/w11122579", "name": "item", "description": "10.3390/w11122579", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/w11122579"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-12-06T00:00:00Z"}}, {"id": "10578/33035", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:24:52Z", "type": "Journal Article", "created": "2023-07-22", "title": "Coupling the electrocatalytic dechlorination of 2,4\u2010 D with electroactive microbial anodes", "description": "Abstract

This work proves the feasibility of dechlorinating 2,4\uffe2\uff80\uff90D, a customary commercial herbicide, using cathodic electrocatalysis driven by the anodic microbial electrooxidation of sodium acetate. A set of microbial electrochemical systems (MES) were run under two different operating modes, namely microbial fuel cell (MFC) mode, with an external resistance of 120\uffe2\uff80\uff89\uffce\uffa9, or microbial electrolysis cell (MEC) mode, by supplying external voltage (0.6\uffe2\uff80\uff89V) for promoting the (bio)electrochemical reactions taking place. When operating the MES as an MFC, 32% dechlorination was obtained after 72\uffe2\uff80\uff89h of treatment, which was further enhanced by working under MEC mode and achieving a 79% dechlorination. In addition, the biodegradability (expressed as the ratio BOD/COD ) of the synthetic polluted wastewater was tested prior and after the MES treatment, which was improved from negative values (corresponding to toxic effluents) up to 0.135 in the MFC and 0.453 in the MEC. Our MES approach proves to be a favourable option from the point of view of energy consumption. Running the system under MFC mode allowed to co\uffe2\uff80\uff90generate energy along the dechlorination process (\uffe2\uff88\uff920.0120\uffe2\uff80\uff89kWh\uffe2\uff80\uff89mol \uffe2\uff88\uff921 ), even though low removal rates were attained. The energy input under MEC operation was 1.03\uffe2\uff80\uff89kWh\uffe2\uff80\uff89mol \uffe2\uff88\uff921 \uffe2\uff80\uff94a competitive value compared to previous works reported in the literature for (non\uffe2\uff80\uff90biological) electrochemical reactors for 2,4\uffe2\uff80\uff90D electrodechlorination.