5 results about "Ion selective membrane" patented technology

This application discloses a method for recycling wastewater from the hydrometallurgical process of laterite nickel ore, comprising the following steps: high-pressure acid leaching of laterite nickel ore is subjected to circulating leaching, CCD washing, iron and aluminum removal, and MHP precipitation treatment, followed by filtration to obtain a post-MHP precipitation liquid; alkali is added to this liquid to remove manganese, and filtration is performed to obtain post-MHP precipitation and manganese removal wastewater; the post-MHP precipitation and manganese removal wastewater is subjected to ion exchange to recover nickel and cobalt, yielding an ion-exchange liquid and a enriched nickel-cobalt solution, which is reused in the CCD washing process; the ion-exchange liquid is treated by extraction or ion-selective membrane treatment to obtain a magnesium-rich solution and a magnesium-poor solution; part of the magnesium-rich solution is reused in the MHP precipitation process, and the remaining portion is evaporated and crystallized to obtain magnesium sulfate; the magnesium-poor solution is subjected to bipolar membrane electrolysis, and the resulting sodium hydroxide solution is reused in the iron and aluminum removal and MHP precipitation processes, while the sulfuric acid solution is reused in the high-pressure acid leaching process. This application improves the recycling rate of wastewater from the hydrometallurgical process of laterite nickel ore, and the recovered intermediate products can be further purified or directly reused in previous processes.

The application provides a sensor with antioxidant and antifouling properties and a preparation method and application thereof, and belongs to the technical field of marine chemistry. The sensor takes a glassy carbon electrode (GC) as a substrate, adopts polyaniline as a solid contact layer, and takes a calcium ion selective membrane (ISM) as a detection core. The innovation of the sensor is that a fucoidan-based functional polypeptide (PFp) is modified on the ISM to construct an antifouling layer. The PFp layer forms a triple synergistic defense mechanism of "anti-adhesion-sterilization-antioxidation". Experiments prove that the sensor can effectively inhibit the adhesion and colonization of bacteria such as escherichia coli and staphylococcus aureus and chlorella, and significantly slow down the oxidative decay of the sensing membrane. In addition, when the sensor is used for calcium ion detection in actual seawater, it exhibits excellent long-term stability and high precision, and provides an innovative strategy for continuous in-situ monitoring in complex media.

A system for producing lithium metal batteries can comprise a manufacturing stage configured to fabricate a negative electrode. The manufacturing stage can comprise a lithium supply and an electrochemical cell, wherein the electrochemical cell comprises a lithium-ion selective membrane. The system for producing lithium metal batteries can comprise a battery assembly stage configured to integrate the negative electrode, the lithium-ion selective membrane, and a positive electrode into a battery. The manufacturing stage can be operatively coupled to the battery assembly stage, integrated in the same facility contained in an area of no greater than 10 km2.

This disclosure provides a self-circulating resin-flowing electrode deionization device for decentralized water purification, relating to the field of water treatment. It includes: an anode section housing an anode flowing electrode in a raw water treatment zone, and a cathode section housing a cathode flowing electrode. A raw water flow section is located between the anode and cathode sections, used to transport raw water and selectively exchange it with the flowing electrode through an ion-selective membrane. A regeneration zone is used for in-situ regeneration of the flowing electrode that adsorbs target ions. A circulation drive unit connects the raw water treatment zone and the regeneration zone, used to drive the flowing electrode to circulate between the two zones. A power supply unit connects the anode and cathode sections, used to provide a driving electric field to drive the directional migration of ions. The anode flowing electrode includes a magnetic anion exchange resin slurry, and the cathode flowing electrode includes a magnetic cation exchange resin slurry. This disclosure addresses the needs of rural or decentralized water treatment, enabling efficient and sustainable decentralized water treatment.