Method for treating dye wastewater by utilizing phosphate modified spartina alterniflora adsorbent

The invention provides a method for treating dye wastewater by using a phosphate-modified spartina alterniflora adsorbent. The method comprises the following steps: pretreating a spartina alterniflora material, modifying the pretreated spartina alterniflora material, preparing to obtain the phosphate-modified spartina alterniflora adsorbent, and treating the dye wastewater by using the adsorbent. The adsorbent is prepared by modifying the spartina alterniflora through phosphoric acid under the catalysis of urea, resources are effectively utilized, harm is turned into good, the smooth surface of the spartina alterniflora becomes extremely rough through phosphoric acid group modification, the structure is changed, many gaps exist, the specific surface area of the spartina alterniflora is increased, and the adsorption capacity of the spartina alterniflora is improved. Further, the adsorption capacity of the spartina alterniflora is improved. 本发明提供了一种利用磷酸基改性互花米草吸附剂处理染料废水的方法，所述方法包括对互花米草材料进行预处理，对预处理后的互花米草材料进行改性，通过制