In an anode and cathode synergistic electrocatalytic system for wastewater treatment and an application, an electrode having a dual function is used as a cathode. The cathode and an anode are sequentially arranged in a crisscrossed and parallel mode and fixed into an electrode group. The electrode group is paced in a reaction tank which has an aeration device at the bottom thereof, separately connecting the cathode and the anode of the electrode group to a power supply. Electrocatalytic degradation is performed on wastewater. In the electrocatalytic degradation process, a synergistic electrocatalytic degradation effect of the anode and the cathode is achieved by the mutual coordination of heterogeneous electro-fenton of the cathode and oxidation of the anode. The cathode ad anode synergistic electrocatalytic process has a good wastewater treatment effect, high current efficiency, low energy consumption, and low operation and maintenance costs.

Devices, apparatus, and methods to treat Per-and polyfluoroalkyl substances (PFAS) and related telomeres including perfluorooctanoic acid (PFOA) and Perfluorooctanesulfonic (PFOS), and other recalcitrant highly stable organic compounds, substances, organic matter, infectious fluids, bacteria, viruses and other pathogens, endocrine disruptors, pharmaceutical, and otherwise oxidizable material contaminants in water, aqueous fluids, condensates, concentrates, brines, and spent solid adsorbent media. The system can include hydrodynamic cavitation; acoustic sonication; electrochemical oxidation; in-line static mixing; and supplemental reagent precursors to create powerful oxidizing conditions within the equipment, and oxidants by the system that destroy said contaminants.

A faucet for dispensing a fluid includes a spout, a pull-out spray head removably coupled to the spout and including an outlet, and a valve assembly in fluid communication with the outlet. Additionally, the faucet includes a fluid treatment assembly configured to output a treatment into the fluid.

A water treatment composition for treating organic wastewater is provided. The water treatment composition includes a bulk catalytic material and an oxidant. The bulk catalytic material includes iron atoms or ions, manganese atoms or ions, and magnesium atoms or ions.

An inventive system and method for treatment of contaminated produced water from fracking operations. The inventive system includes a filtration unit, an electrolysis unit, and a cavitation unit. The filtration unit may comprise mesh filtration units or reverse osmosis filtration units. The electrolysis unit may include alternative anode and cathode plates, where the anode plates have a mixed metal oxide coating. Each of the filtration, electrolysis, and cavitation units preferably comprise two or more of each arranged in parallel, such that each can be operated independently without stopping the operation of the entire system. The system and method may further include separation tanks and/or dissolved air flotation tankseither before or after the electrolysis unit or cavitation unit processing.

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.

Methods and systems for in situ electrochemical treatment of aqueous solutions used in agricultural systems, community systems and industrial systems. In aspects, is an in situ electrochemical method for the treatment of fertigation water, comprising: flowing the fertigation water through an electrochemical cell comprising at least one anode and at least one complementary cathode while simultaneously adjusting one or more of current density, flow rate and pH, wherein said flowing fertigation water contacts the anode and cathode causing one or more of: degradation of a recalcitrant organic contaminant, mineralization and solubilization of an organic, forming a disinfection agent against a pathogen, and maintaining nutrient levels in said fertigation water; and collecting treated effluent.

An embodiment relates to a catalyst for decomposing non-degradable pollutants and a non-degradable pollutant decomposition system including the same, and more specifically, to a catalyst for an electro-/nonelectro-Fenton reaction system, the catalyst including at least one of 1) non-reducible transition metal oxide particles having a reduced surface, or 2) non-reducible transition metal oxide particles functionalized with H.sub.3ZPO.sub.4.sup.Z (Z=1 to 3) and having a reduced surface; an electrode including the catalyst for the electro-/nonelectro-Fenton reaction system; and an electro-/nonelectro-Fenton reaction system using the electrode, for efficient decomposition of non-degradable organic matter.

A treatment system including an influent pump to pump influent fluid stream containing PFAS into the system. The system may include a flow recirculation system including a fluid circuit through which a recirculating fluid stream flows, an electrochemical (EC) reactor comprising at least one pair of electrodes. When the EC reactor is in a first operational mode, a current generated between the anode electrode and the cathode electrode destroys at least some of the PFAS. The system may include a foam management system to reduce an amount of foam in a container of the EC reactor. The system may include a chemical management system to inject a chemical into the recirculating fluid stream. The system may include a temperature control system to regulate a temperature of the recirculating fluid stream. The system may include a recirculation pump to pump the recirculating fluid stream through the flow recirculation system.

Methods, systems and devices for removing iodide from an aqueous solution including submerging an iodophilic electrode in an aqueous solution containing iodide, applying a current to the electrode, and electrochemically oxidizing the iodide to iodine within the electrode. The electrode may include an iodophilic material and an electrically conductive material. It may also include a binder. The iodophilic material may be a starch, chitosan, carboxycellulose, cationic polymer, or an anion exchange membrane material, for example. After oxidizing the iodide to iodine within the electrode, the electrode may be submerged in a second solution and a current may be applied to reduce the iodine and release it from the electrode in the form of iodide into the second solution.