A method and device for removing chloride ions in desulfurized wastewater by electrochemical coupling in which the device comprises: an electrolyte tank having a top and a bottom wherein the tank is used as a separator in a separation process and as an electrode regenerator in an electrode regeneration process; two electrodes comprising a hydrogen evolution electrocatalysis function electrode and an electrochemically switched ion exchange (ESIX) function electrode respectively, wherein the electrodes are connected with each other by a wire; two DC circuits having opposite electric field directions and used alternately in the separation process and the electrode regeneration process respectively; the bottom of the electrolyte tank is provided with a purified high-concentration chloride ion wastewater inlet and a flocculation product outlet; the top of the tank is provided with a dechlorination treatment water outlet and a hydrogen collecting port; and, in the electrode regeneration process, the electrolyte tank is connected to an electrode regeneration liquid storage tank through a pump and a pipeline.

Methods and systems for the purification of an aqueous solution comprising a photocatalyst employed as an anode and a cathode in communication with an electrolyte to achieve a current flow wherein a charge is applied between the cathode and the photocatalytic excited anode a corresponding increase in electron-hole pairs occurs.

The present disclosure provides an application of a titanium carbide/porous carbon composite in electrochemical treatment of uranium-containing wastewater, and belongs to the technical field of wastewater treatment. The present disclosure provides the application of the titanium carbide/porous carbon composite in electrochemical treatment of uranium-containing wastewater. Titanium carbide (TiC) is a typical transition metal carbide and has good conductivity and excellent chemical stability; compared with a titanium dioxide/carbon nanomaterial, the titanium carbide/porous carbon composite has a rich pore structure that provides a large number of activated adsorption sites for adsorption of metal ions during electro-adsorption, so that the electro-adsorption efficiency can be substantially improved, and a better electro-adsorption effect is obtained.

The invention relates to the methods for sewage treatment contaminated by mechanical impurities, fats, proteins and other organic and inorganic compounds, and can be used for purification and water disinfection contaminated by heavy and radioactive metals, saturated or unsaturated fats, filtrate from landfills, meat processing plants, and/or oil and petroleum. The method includes flotation, electrocoagulation and filtration, and provides: mixing water with carbon-based sorbent; filtration of water and carbon sorbent on rubber-based hydrophobic sorbent; decomposition of organic substances accumulated on carbon and rubber sorbents; floatation with hydrogen peroxide; recovery active substance in hydrogen peroxide; reuse thereof; electrocoagulation with water saturation with oxygen and hydrogen, formed on indispensable carbon or metal electrodes based on the of aluminum, titanium, sodium, tin, copper, and other metals; water disinfection by electro-cavitation; generation of active substance based on the iron and titanium atoms; water filtration on the precoat filter; and filtering on activated carbon filter.

Proposed are an ozone generating electrode, a method of manufacturing the same, and a method of producing ozone using the same. The ozone generating electrode includes a support including a metal, a catalyst layer positioned on one surface or both surfaces of the support, and a coating layer positioned on the catalyst layer and including a metal oxide. The ozone generating electrode is energy efficient, stable, and provides a high concentration of ozone to a water system. In addition, when water treatment is performed with the ozone generating electrode of the present invention, it is possible to more effectively decompose pollutants during water treatment and to reduce the electrode replacement cycle, thereby reducing water treatment operation time and cost.

An apparatus for electrolysing seawater to produce hydrogen is disclosed. The apparatus includes a unipolar electrolytic cell configured to operate in cathode-cathode mode and configured to reduce the production of chlorine and/or oxygen.

An irrigation system is provided. The irrigation system includes a reservoir for storing irrigation water, an electrolytic gas generator, a detector, and a control unit. The electrolytic gas generator is in fluid communication with the reservoir to output a first gas and a second gas generated by the electrolytic gas generator to the irrigation water. The detector is arranged in the water reservoir to detect the concentrations of dissolved first gas and dissolved second gas of the irrigation water to obtain dissolved gas concentration information. The control unit electrically connects to the detector and the electrolytic gas generator receives the dissolved gas concentration information and adjusts the voltage applied to the electrolytic gas generator according to the dissolved gas concentration information to control the type of gas generated by the electrolytic gas generator and the concentrations of dissolved first and second gas of the irrigation water.

A high-specific surface area and super-hydrophilic gradient boron-doped diamond electrode is disclosed. The electrode directly uses a substrate as an electrode matrix; or a transition layer is disposed on a surface of the substrate and used as the electrode matrix. A gradient boron-doped diamond layer is disposed on a surface of the electrode matrix, and a contact angle of the electrode is θ<40°. The gradient boron-doped diamond layer includes: a gradient boron-doped diamond bottom layer, a gradient boron-doped diamond middle layer, and a gradient boron-doped diamond top layer, a boron content of which gradually increases, so the gradient boron-doped diamond layer has high adhesion, high corrosion resistance, and high catalytic activity. The high-content boron of the top layer is combined with a one-time high-temperature treatment, so the gradient boron-doped diamond electrode has a high-specific surface area and superhydrophilicity, which may greatly improve the mineralization and degradation efficiency of the electrode.

In this disclosure, a process of recycling acid, base and the salt reagents required in the Li recovery process is introduced. A membrane electrolysis cell which incorporates an oxygen depolarized cathode is implemented to generate the required chemicals onsite. The system can utilize a portion of the salar brine or other lithium-containing brine or solid waste to generate hydrochloric or sulfuric acid, sodium hydroxide and carbonate salts. Simultaneous generation of acid and base allows for taking advantage of both chemicals during the conventional Li recovery from brines and mineral rocks. The desalinated water can also be used for the washing steps on the recovery process or returned into the evaporation ponds. The method also can be used for the direct conversion of lithium salts to the high value LiOH product. The method does not produce any solid effluent which makes it easy-to-adopt for use in existing industrial Li recovery plants.

The invention of the current application is directed to a wastewater treatment apparatus. The invention includes a divided membrane electrochemical cell including an anode contained within a anode compartment and cathode contained within a cathode compartment. The anode compartment and said cathode compartment are separated by a proton selective membrane. The invention also includes a voltage source, and a liquid-gas separator. The invention is an economically viable electrochemical advanced oxidation system that can cost-effectively treat recalcitrant COD with low energy, without the necessity for chemicals, and reduce or prevent sludge production in a single step.