Iron-manganese-modified algae adsorbent and preparation method thereof

The invention provides an iron-manganese-modified algae adsorbent and a preparation method thereof and belongs to the technical field of water treatment. The preparation method comprises the followingsteps of a, adding permanganate into water which is bursting with algae and mixing the two components to obtain a first solution; b, adding a ferrous salt into the first solution obtained in step a,mixing the mixture, and performing standing to obtain a second solution; c, centrifuging the second solution obtained in step b, removing a supernatant, and drying an obtained precipitate; d, washingthe dried precipitate in step c with alkali, centrifuging the precipitate, washing the precipitate with ultrapure water until the precipitate is neutral, and drying and grinding the treated precipitate to obtain the iron-manganese-modified algae adsorbent. The iron-manganese-modified algae adsorbent prepared by the method is mainly used for removing heavy metal ions in sewage, the preparation process of the method is simple