The current invention relates to a peritoneal dialysis filter device, which comprises a housing comprising a first port and a second port, and a hollow fibre membrane formed from hollow hydrophilic fibres within the housing. When in use, a dialysate from a subject enters the filter device through the first port and exits via the second port in an outflow direction, and a regenerated dialysate from a sorbent system enters the filter device through the second port and exits via the first port in an inflow direction. Also disclosed herein is a peritoneal dialysis system comprising said filter device, a method for controlling dialysate flow in a peritoneal dialysis system, and a haemodialysis device.

The present disclosure generally relates to liquid separation membranes. The present disclosure also relates to membranes comprising at least a nanoporous hydrophilic layer and a porous hydrophobic substrate. The present disclosure also relates to a process for preparing the membranes and to use of the membranes in pervaporation and/or membrane distillation processes including desalination and/or solvent dehydration.

An ionically conductive thin film composite (TFC) membrane is described. The low cost, high performance TFC membrane comprises a micropous support membrane, and a hydrophilic ionomeric polymer coating layer on a surface of the microporous support membrane. The hydrophilic ionomeric polymer coating layer is ionically conductive. The ionomeric polymer can also be present in the micropores of the support membrane. Methods of making the membrane and redox flow battery system incorporating the TFC membrane are also described.

A method and system for electrochemically regenerating hydroxide (MOH) and carbon dioxide (CO.sub.2) from an alkali metal carbonate (M.sub.2CO.sub.3) via an electrochemical reactor that can replace a conventional thermochemical causticizing operation in a DAC system. The electrochemical reactor comprises: a cathode having an inlet for receiving an electrolyte feed stream comprising MOH, M.sub.2CO.sub.3 and H.sub.2O, and an outlet for discharging an electrolyte product stream comprising MOH, M.sub.2CO.sub.3, H.sub.2O and H.sub.2; a porous hydrophilic transport barrier in adjacent contact with the cathode; a porous hydrophilic anode in adjacent contact with the transport barrier configured and operable to generate CO.sub.2 in the presence of MOH while suppressing their recombination; a porous hydrophobic CO.sub.2 and O.sub.2 separation barrier in adjacent contact with the anode; and a product gas exit channel in adjacent contact with the CO.sub.2 and O.sub.2 separation barrier and for discharging an anode product stream comprising at least CO.sub.2.

The present invention relates to a porous membrane including a plurality of through-type pores, and when the porous membrane is used, a particle to be analyzed and a reactive particle may be reacted one-to-one, thereby increasing the efficiency and accuracy of particle analysis.

Provided herein are compounds, compositions, and methods for the treatment of wastewater. Provided herein are compounds, composites, compositions, and methods for purifying a medium such as wastewater, saline for desalination, and petroleum wastes.

A super-hydrophilic surface treatment method of a filter medium of a filter for oil-water separation according to the present invention includes preparing a filter medium or a filter including the filter medium using a polymer base or a metal base, and forming a hydrophilic coating layer to the filter medium or the filter including the filter medium by cross-linking bis-acrylamide (N,N-methylenebisacrylamide).

Disclosed are super-hydrophobic, super oleophilic membranes comprising a metal mesh comprising copper, a coating comprising a carbohydrate derivative, wherein the carbohydrate derivative is covalently or ionically bonded to a metal mesh surface and methods of preparation thereof. The disclosed membranes are useful for wastewater treatment in the oil industry, in particular for oil/water separation processes.

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.

Provided are a composite semipermeable membrane capable of enhancing adhesion between a separation functional layer provided with a coating layer and a protective tape while maintaining an effect of the coating layer to some extent, and a spiral membrane element using the composite semipermeable membrane.

A composite semipermeable membrane includes: a porous support; a separation functional layer formed on the porous support; and a coating layer provided on a surface of the separation functional layer, the coating layer having different surface roughnesses due to different adhesion amounts of a coating material depending on locations. The composite semipermeable membrane has a coating layer-side surface on which a glossy portion having a surface roughness Ra of 30 nm or less and a non-glossy portion having a surface roughness Ra of 50 nm or more are provided.