Described is a system and corresponding method for remediating liquid waste streams. The system includes an electro-oxidation (EO) chamber, an electro-deposition (ED) chamber, and an electro-adsorption (EA) chamber. In the method, a waste stream is subjected to electro-oxidation, followed by electro-deposition and/or electro-adsorption. The method removes both organic and inorganic pollutants, as well as metals present as free ions or bound into organic or inorganic complexes.

The recovery of target species, and related systems and methods, are generally described.

A process for the manufacturing of 3D reduced graphene oxide/Fe.sub.2O.sub.3 material includes the following steps: (i) putting in contact a graphene oxide (GO) water dispersion with an aqueous solution of iron(II) sulfate; (ii) hydrothermal treatment; and (iii) freezing the reaction product obtained in step (ii) at a temperature ≤−5° C.; and (iv) lyophilisation. A 3D reduced graphene oxide/Fe.sub.2O.sub.3 material is obtainable by the process and further relates to electrodes for CDI devices having the material. A method for removing ions from a fluid, like saline water, using the capacitive deionization device includes applying a voltage to the electrodes while supplying said fluid into the capacitive deionization device.

A portable hydrogen-containing ozone water humidifier including a housing with a mist outlet, a water tank for storing water, a hydrogen-containing ozone water generator, an ultrasonic atomizer for converting water into mist, a rechargeable battery and an electronic controller is revealed. An outlet pipe is connected to the bottom of the water tank and the hydrogen-containing ozone water generator is disposed on the outlet pipe for hydrolysis of the water to generate oxygen and ozone gas at an anode plate and hydrogen gas at a cathode plate and further get disinfectant water formed by ozone water mixed with hydrogen-rich water while the ultrasonic atomizer is arranged at an outlet end of the outlet pipe. The rechargeable battery provides power to the electronic controller, the hydrogen-containing ozone water generator, and the ultrasonic atomizer for driving them to work. The humidifier is compact and easy to carry.

A method and apparatus for producing hydroxyl radicals in a fluid chamber in an electrochemical cell comprising at least one cathode, at least one anode and at least one source of photolyzing radiation. The method comprises causing an electrochemical cell to produce hydrogen peroxide in the fluid, and causing at least one photolyzing radiation source, such as UV-LED, to photolyze the hydrogen peroxide to produce hydroxyl radicals. The fluid treatment apparatus includes: a structure defining a fluid chamber; at least one cathode facing into the fluid chamber; at least one anode facing into the fluid chamber; and a photolyzing radiation source operable to emit photolyzing radiation into at least one electrochemical cell portion of the fluid chamber, which is suitable for producing hydrogen peroxide.

Herein, provided are new classes of nitrogen enriched graphitic-like carbon-based materials porous nanosheets doped atomically with one or more metal atoms and/or non-metal traces, for example, binary Pt and Cu denoted as (Pt—Cu-gCN-Ns), and methods of making and using the materials, for example, in capacitive seawater desalination under ambient reaction conditions and parameters.

This invention relates to a novel conductive organic membrane-coupled filtration system for the degradation of organic pollutants from wastewater. The system comprises a connected water pump and a reactor. The upper end of the reactor contained a water inlet, and the lower end consisted of a water outlet. A counter electrode and a membrane electrode are fixed on the reactor between the water inlet and water outlet. The counter electrode and membrane electrode constitute a two-electrode system connected to an external potentiostat through metal wires. The membrane electrode is made of carbon-based polyvinylidene fluoride (PVDF) membrane that can be used to enhance the electrochemical separation of small molecules and the removal of organic pollutants.

An aerosol condensing system is provided. The aerosol condensing system includes a source electrode electrically connected to an electrical source that applies an electrical voltage to the source electrode, a condenser including a sink electrode to collect aerosol contained in an air stream to the sink electrode, and a duct configured to direct the aerosol to the condenser. The source electrode and the sink electrode creates an electrical field within the duct.

A bioelectrochemical reactor (1) has an anode chamber (11) having at least two bioanodes (12, 13), and an anodic electrolyte (14) with an anodic electroactive microorganisms,—a cathode chamber (21) with at least one biocathode (22), and a cathodic electrolyte (24) with a cathodic electroactive microorganisms. The anode chamber (11) is separated from the cathode chamber (21) by, running from the anode chamber to the cathode chamber, a cation exchange membrane (31) and an anion exchange membrane (32). The cation and anion exchange membranes are separated from each other by an inter-membrane chamber (30), and means for applying a potential difference between the interconnected bioanodes and the biocathode/biocathodes. The bioanodes and biocathode/biocathodes have active surfaces such that the total active surface of the biocathode/biocathodes (22) is greater than the total active surface of the two bioanodes (12, 13). The arrangement includes a method for regenerating the activity of the bioanodes of the reactor and to the use of said reactor for the electrosynthesis of organic acids and/or alcohols from organic waste.

The present disclosure provides methods, electrodes, and systems for electrochemical oxidation of polyfluoroalkyl and perfluroalkyl (PFAS) contaminants using Magnéli phase titanium suboxide ceramic electrodes/membranes. Magnéli phase titanium suboxide ceramic electrodes/membranes can be porous and can be included in reactive electrochemical membrane filtration systems for filtration, concentration, and oxidation of PFASs and other contaminants.