Preparation method of adsorption microfiltration membrane for selectively fixing heavy metal lead in water

The invention relates to a preparation method of an adsorption microfiltration membrane for selectively fixing heavy metal lead in water. The preparation method comprises the following steps: preparing a substrate microfiltration membrane; a cross-linking agent solution containing lead ions is subjected to a cross-linking reaction on the substrate micro-filtration membrane, then the lead ions are eluted and removed, and the adsorption micro-filtration membrane for selectively fixing the heavy metal lead in the water is obtained. According to the invention, the microfiltration membrane is modified, and the material is constructed into the composite membrane capable of selectively adsorbing the lead ions through a cross-linking reaction, so that the composite membrane has the performance of selectively adsorbing the lead ions, and the heavy metal ion lead in water can be removed in the microfiltration process at the same time. The preparation method of the adsorption micro-filtration membrane material is simple