Sustained-release material for treating acid wastewater and preparation method of sustained-release material

The invention relates to the technical field of wastewater treatment and particularly relates to a sustained-release material for treating acid wastewater and a preparation method of the sustained-release material. The preparation method comprises the following steps: breaking and crushing an alkaline material, and manufacturing the broken and crushed material into a spherical shape; covering a housing layer on the outer layer of the spherical shape, and processing the housing to form holes. By adopting the preparation method, a release rate of the alkaline material in the sustained-release material is controlled, the service life of the sustained-release material is prolonged, and the acid wastewater treatment cost is lowered. The preparation method of the sustained-release material is simple, and the sustained-release material is manufactured into combination of the housing and a core during manufacturing, so that the core is protected by virtue of the housing, the release rate of the alkaline material is controlled, the sustained-release effect of the alkali is strengthened, the service life of the sustained-release material is prolonged, and the acid wastewater treatment cost is lowered. Moreover, the sustained-release effect is not completely dissolved in water, and easy to recycle.