Photovoltaic wastewater treatment method, hydrogel spheres and preparation method and application

Abstract

The application relates to a photovoltaic wastewater treatment method, a hydrogel ball and a preparation method and application. The photovoltaic wastewater treatment method comprises the following steps: separating and recycling waste solar cells to obtain waste solar cell powder containing transition metals; mixing and cross-linking the waste solar cell powder, polyvinyl alcohol and sodium alginate to prepare a hydrogel ball; and using the hydrogel ball to purify photovoltaic wastewater containing chemical organic pollutants generated in the waste solar cell separation process. The application provides a hydrogel ball prepared from waste solar cell powder, the hydrogel ball can effectively adsorb chemical organic pollutants in wastewater, meanwhile, the waste solar cell powder contains transition metals, the transition metals can easily induce dissolved oxygen to generate hydroxyl radicals in an aqueous solution, the hydroxyl radicals can play a role in rapidly degrading chemical organic pollutants in the wastewater, so that COD in the photovoltaic wastewater can be significantly removed.