An electrolytic liquid production device includes: an electrolyzer configured to perform electrolytic treatment to a liquid; an elastic body configured to press the electrolyzer; and a housing having the electrolyzer and the elastic body disposed inside the housing. The housing has an inlet port that the liquid supplied to the electrolyzer flows into, and an outlet port that an electrolytic liquid produced in the electrolyzer flows out from. The elastic body includes a positioning depressed portion, and the housing includes a positioning protruding portion. The elastic body is positioned with respect to the housing by inserting the positioning protruding portion of the housing into the positioning depressed portion of the elastic body.

Methods, systems, and devices for PFAS destruction including providing water containing PFAS to a reactor vessel, irradiating the water with UV light under conditions to destroy at least a portion of the PFAS, passing the treated water through a selective membrane to form permeate and membrane reject comprising PFAS, providing the membrane reject back to the reactor vessel, providing additional water containing PFAS to the reactor vessel within the reactor vessel or before being provided to the reactor vessel, and irradiating the membrane reject and the additional water containing PFAS within the reactor vessel with UV light. The steps may be repeated a plurality of times such that PFAS that is not destroyed is recycled through the reactor vessel. Sensitizers may be added and may also be recycled in the membrane reject with the PFAS.

A membrane-mediated electro-oxidation-reduction deep water treatment device and an operation method thereof, is related to the technical fields of electrochemistry, membrane separation and water treatment. The present invention provides a membrane-mediated electro-oxidation-reduction deep water treatment device of which the anode conductive membrane and the cathode conductive membrane are respectively connected to the positive and negative electrodes of an external power supply through conductive connectors. The fluid to be treated vertically penetrates through the conductive membranes (the anode conductive membrane and the cathode conductive membrane). When current passes through, the anode conductive membrane and the cathode conductive membrane produce a synergistic effect of electrochemical oxidation and reduction. At the same time, the three-dimensional carbon particles electrode becomes a bipolar particles electrode due to the induced electric field, so that the conductive membrane and the three-dimensional carbon particles electrode generate active species with strong redox in situ, expanding the reaction area, and being able to quickly degrade refractory organic pollutants in water. The present invention can obtain a membrane-mediated electro-oxidation-reduction deep water treatment device and an operation method thereof.

Water treatment methods and systems for the collection and destruction of per- and polyfluorinated alkyl substances (PFAS) in water are provided. The systems and methods utilize a powdered activated carbon treatment (PACT) step and a wet air regeneration (WAR) treatment step followed by an electro-oxidation treatment step. The disclosed methods and systems are capable of destroying PFAS present in water streams and/or adsorption media, including groundwater, drinking water, or industrial or municipal wastewater.

Water treatment systems are disclosed. The system includes an electrochemical cell having an inlet and an outlet, a cathode comprising a catalytic material for electrochemical generation of persulfate free radicals, and an anode, a source of a persulfate positioned upstream of the electrochemical cell, first contaminant concentration sensor positioned upstream of the electrochemical cell, and a controller operatively coupled to receive one or more input signals from at least the first contaminant concentration sensor. Methods of treating water using the electrochemical cell disclosed herein are disclosed. Methods of facilitating water treatment by providing the electrochemical cell disclosed herein are disclosed. Methods of retrofitting a water treatment system having an AOP by providing the electrochemical cell disclosed herein are disclosed.

An electrolyte solution production device includes an electrolysis unit and a housing in which the electrolysis unit is disposed. The electrolysis unit is configured to electrolyze a liquid, and includes a stacked body having a cathode, an anode, and a conductive film between the cathode and the anode, the cathode and the anode constituting electrodes adjacent to each other. the housing includes an inflow port through which the liquid is supplied to the electrolysis unit and an outlet port through which an electrolyte solution produced in the electrolysis unit flows out from the electrolysis unit. The conductive film includes a protrusion that protrudes toward an inner surface of the housing and positions the conductive film with respect to the housing.

There is provided a method of preparing a photoelectrochemical and electrochemical electrode catalyst, the method including preparing a metal oxide-based electrode, introducing a phosphate layer on a surface of the metal oxide-based electrode; and converting the phosphate layer into an oxyhydroxide layer by performing electrochemical activation on the phosphate layer. The efficiency of selective oxidation reaction of ammonia in wastewater may be improved.

Copper-boron-ferrite (CuBFe) composites may be prepared and immobilized on graphite electrodes in a silica-based sol-gel, e.g., from rice husks. Different bimetallic loading ratios can produce fast in-situ electrogeneration of reactive oxygen species, H.sub.2O.sub.2 and .Math.OH, e.g., via droplet flow-assisted heterogeneous electro-Fenton reactor system. Loading ratios of, e.g., 10 to 30 wt. % Fe.sup.3+ and 5 to 15% wt. Cu.sup.2+, can improve the catalytic activities towards pharmaceutical beta blockers (atenolol and propranolol) degradation in water. Degradation efficiencies of at least 99.9% for both propranolol and atenolol in hospital wastewater were demonstrated. Radicals of .Math.OH in degradation indicate a surface mechanism at inventive cathodes with correlated contributions of iron and copper. Copper and iron can be embedded in porous graphite electrode surface and catalyze the conversion of H.sub.2O.sub.2 to .Math.OH to enhance the degradation. Inventive cathodes can be stable catalytically after 20 or more cycles under neutral and acidic conditions.

Embodiments relate to a catalyst for decomposing organic substances and a system for decomposing organic substances including the same, and specifically, to an electrical or non-electrical organic substance decomposition system for efficient decomposition of toxic or recalcitrant organic substances, including: 1) at least one of the following four types of transition metal oxide particles: non-reducible transition metal oxide particles, surface-reduced non-reducible transition metal oxide particles, non-reducible transition metal oxide particles containing at least one of NO.sub.3.sup., H.sub.3-APO.sub.4.sup.A (A=1-3), and SO.sub.4.sup.2 functional groups, and surface-reduced non-reducible transition metal oxide particles containing at least one of NO.sub.3.sup., H.sub.3-APO.sub.4.sup.A (A=1-3), and SO.sub.4.sup.2 functional groups; and 2) an aqueous electrolyte solution having a pH of less than 2 and containing an acid.

A device and a method for selectively removing a perfluorinated compound according to one embodiment of the present disclosure may include: oxidizing and decomposing a perfluorinated compound contained in raw water through adsorption and electrooxidation in an adsorption electrooxidation tank including a reaction unit comprising insoluble electrodes including a dimensionally stable anode (DSA) or a boron-doped diamond (BDD) electrode having a multi-electrode structure in which anodes and cathodes are arranged, and granular activated carbon filled between the insoluble electrodes; and maintaining a water level within the reaction unit at a height greater than or equal to a reaction height of the insoluble electrodes by a head adjustment device.