The invention relates to a preparation method of a gold absorbent based on a waste
eggshell membrane
biomaterial, and belongs to the technical field of resource recycling. Through the acid pretreatment,
protein hydrolysis and modified curing of an
eggshell, a modified biological
protein composite absorbent can be obtained. The cross-
linked protein is changed to a water-soluble substance through the
hydrolysis of the
protein, internal functional groups also can be exposed, the modified curing process is carried out in the water solution, and the reaction uniformity is improved. The prepared absorbent contains a great amount of specific reactive functional groups for adsorbing gold ions, thereby having a special
selective adsorption property for the gold ions. The preparation material is sourced from the kitchen waste
eggshell, so that no only can the surface of the adsorbent have a plurality of protein groups of the
eggshell membrane, but also the functional property of a modifier can be integrated. The raw materials of the absorbent are abundant, the cost is low, the process is simple, and the
operating time is short; and moreover, the kitchen waste is used for recycling the gold to treat the waste by utilizing the waste, and a high adsorption property and an excellent practicability can be realized.