Biochar in-situ loaded manganese oxide adsorbent as well as preparation method and application thereof

The invention belongs to the technical field of tetracycline adsorption material preparation, and particularly relates to a biochar in-situ loaded manganese oxide adsorbent and a preparation method and application thereof. Comprising the following steps: mixing spore powder biochar and a bivalent manganese salt solution to form a mixture A; mixing a potassium permanganate solution and an alkali solution to form a mixture B; and adding the mixture A into the mixture B in a stirring state, standing at room temperature, aging at 60-80 DEG C, and drying to obtain the biochar in-situ loaded manganese oxide adsorbent. According to the method, spore powder biochar is taken as a carrier, a biochar in-situ loaded manganese oxide adsorbent is synthesized by adopting a chemical coprecipitation method, manganese dioxide nanoparticles are adsorbed through micropores of the spore powder biochar, the surface of the biochar is coated with the manganese dioxide nanoparticles, and a contact site combined with a pollutant TC is