A composite ion-adsorbing carbon membrane and its preparation method

Abstract

The invention discloses a composite ion-adsorption carbon membrane and a preparation method thereof, which comprises 10-20 parts of modified zeolite fine powder, 15-25 parts of modified medical stone fine powder, and 5-15 parts of diatomite fine powder. 25-35 parts of activated carbon as a pore-forming agent, 10 parts of humic acid as a modifier, and 5 parts of aluminum dihydrogen phosphate as a binder, through mechanical mixing, banburying, pressing, and low-temperature firing. The resulting thickness is a void-like film of 0.3-1.0 millimeters; the above-mentioned parts are parts by weight; the present invention makes a novel composite adsorption carbon film material with zeolite, medical stone, humic acid and diatomite activated carbon fiber, and exerts adsorption and filtration collective effect. After humic acid modification, the ion exchange space and inner surface area are increased, so that the prepared composite adsorption filter material further enhances the adsorption capacity and filtration capacity, and achieves better dual effects of adsorption and filtration.

Description

technical field [0001] The invention relates to the field of materials, in particular to adsorption and air separation membranes for water treatment. Background technique [0002] At present, water treatment methods mainly include biochemical treatment technology, physical and chemical treatment technology and membrane separation technology. [0003] In the physical and chemical treatment technology, the adsorption method occupies a pivotal position. It is a method in which one or more substances in water are adsorbed on the solid surface and removed by using porous solid substances. Because of its advantages of high efficiency, economy, simplicity, and good selectivity, it has unique application value especially in the treatment of low-concentration heavy metal wastewater that cannot be treated by traditional methods. There are many research reports on the application of adsorption method in wastewater treatment and water purification treatment. So far, the most commonly...

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Problems solved by technology

[0004] Activated carbon adsorbent has good adsorption effect and excellent performance, but due to the difficulty of regeneration of activated carbon and high cost, its application has great limitations; ion exchange resin has excellent ability to remove inorganic ions, has regeneration ability and simple device, but its exchange The capacity is limited, the resin will dissolve organic matter, the surface will have microbial reproduction, and the disintegrated fragments of the resin will cause the increase of particles in the water, etc.; natural mineral adsorption materials are rich in resources, large in storage, low in cost, efficient and fast, but simple Using untreated natural substances as adsorbents has limited adsorption effect; solid waste adsorbents include slag, cinder, fly ash, powder after plant straw incineration, etc. They are low in cost and have a large specific surface area. Sewage treatment has important applications, but it is not easy to regenerate, which has caused secondary pollution problems; inorganic adsorbents have better treatment effects, and are easy to use in combination with chemical methods, but require relatively high alkaline conditions. Increased processing costs in

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