Method for selectively adsorbing lithium ions based on protein/inorganic nanoparticle composite membrane

The invention discloses a method for selectively adsorbing lithium ions based on a protein/inorganic nanoparticle composite membrane, which is characterized in that the composite membrane formed by protein and inorganic nanoparticles is used as an adsorbing material, and the lithium ions are selectively adsorbed from a liquid water environment under the condition that the pH is 5-9; wherein the protein is soybean protein isolate or corn protein, and the inorganic nanoparticles are titanium dioxide, zirconium dioxide, manganese dioxide, silicon dioxide or zinc dioxide. The preparation method of the protein/inorganic nanoparticle composite membrane is simple, low in cost, good in lithium ion adsorption effect, capable of rapidly and selectively extracting the lithium ions from the aqueous solution with the high magnesium-lithium ratio, economical, practical and easy and convenient to operate, and has good application and popularization prospects. 本发明公开了一种基于蛋白质/无机纳米颗粒复合膜选择性吸附锂离子的方法，该方法是以蛋白质与无机纳米颗粒形成的复合膜为吸附材料，在pH