4results about How to "Increase switching capacity" patented technology

The application provides a cation exchange membrane and a preparation method and application thereof, and belongs to the technical field of cation exchange membranes.The method provided by the application is free of volatile organic compounds, toxic and harmful monomers or heavy metal components, and the raw material itself is environmentally friendly.The method is free of harmful gas emission and hazardous waste generation, and is environmentally friendly.The cation exchange membrane material prepared by the method is chemically stable, easy to recycle after being discarded, free of additive precipitation during use, and free of pollution to the treatment system.The water-soluble dispersion bonding medium adopted by the application forms rich and uniform connected pore structures in the cation exchange membrane after being washed by water, greatly reduces ion migration resistance, significantly alleviates membrane polarization, and improves ion exchange rate and energy utilization efficiency when used for separation.The method provided by the application is free of complex chemical reactions, harsh process conditions, and standardized operation steps, and is easy to realize large-scale continuous production.

This invention discloses a method for preparing a double-crosslinked network anion exchange membrane and its application. The method for preparing the double-crosslinked network anion exchange membrane includes the following steps: (1) dissolving polyvinylidene fluoride in DFM to obtain a transparent solution A; (2) dissolving p-vinylbenzyltrimethylammonium chloride in solution A to obtain solution B; (3) dissolving 1-vinylimidazolium in solution B to obtain solution C; (4) dissolving benzoyl peroxide in solution C to obtain solution D; (5) heating solution D and then adding 1,4-p-dichlorobenzyl to obtain solution E; (6) heating solution E and then spreading the resulting brown transparent solution onto a clean glass plate and drying it to obtain the double-crosslinked network anion exchange membrane. This invention provides the application of the prepared double-crosslinked network anion exchange membrane in electrodialysis desalination. The preparation process of this invention is simple, achieves good desalination performance of the anion exchange membrane, and improves the stability and mechanical strength of the membrane.

The application belongs to the technical field of hydrometallurgy, and particularly relates to a method for recovering iron and manganese from wolframite acidolysis wastewater, which comprises the following steps: obtaining wolframite acidolysis wastewater containing Fe and Mn, adding a manganese-containing reagent into the wolframite acidolysis wastewater to adjust the pH to 4-4.5, filtering to obtain Fe(OH)3 and a manganese-containing filtrate; and recovering manganese from the manganese-containing filtrate by ion exchange, extraction or precipitation to obtain a manganese-containing product. The application prepares a by-product of iron hydroxide by adding a manganese-containing reagent, does not introduce other impurities in the process, and can subsequently enrich and recover the added reagent, reduces the use of additional consumables, and avoids resource waste; the self-made resin has higher exchange capacity and selectivity than traditional cation exchange resins, and improves the purity of the by-product of manganese sulfate solution; through the graded recovery of iron and manganese, the purity of calcium sulfate generated by subsequent ammonia removal is high, and the calcium sulfate can be sold as a by-product, thereby significantly reducing the solid waste discharge of the whole process.

The invention discloses a phosphorus-solubilizing fungus soil remediation agent as well as a preparation method and application thereof, and belongs to the technical field of soil remediation. The phosphorus-solubilizing fungus soil remediation agent comprises micro-nano bone black and a penicillium deserticola solid fungicide. The preparation method comprises the following steps: pyrolyzing pig bones, and grinding to obtain the micro-nano bone black; the method comprises the following steps: coating a solid culture medium with penicillium deserticola for culturing to obtain a solid plate, washing the solid plate after spores are mature to obtain a spore liquid, mixing a solid carrier with sterile water, then adding a solid fungicide protective agent, and finally adding the spore liquid to obtain the penicillium deserticola solid fungicide. The phosphorus-solubilizing fungus soil remediation agent provided by the invention not only can effectively promote dissolution of insoluble phosphate, but also can fix heavy metal cadmium (Cd) in soil, has a very good application value for farmland Cd pollution remediation and environmental protection, is green and environment-friendly, can comprehensively improve soil fertility, and creates a good nutritional condition for crop growth.