Material for treating sewage as well as preparation method and application

The invention discloses a material for treating sewage as well as a preparation method and application. A chemical formula of the material for treating the sewage is as follows: FeaBb, wherein a is greater than or equal to 20 and less than or equal to 99, b is greater than or equal to 1 and less than or equal to 80 and the sum of the a and the b is equal to 100. The material for treating the sewage, disclosed by the invention, contains iron, so that the material and a -N=N- double bond in an azo dyestuff can be subjected to redox reaction, so that a -N=N- double bond group which is toxic and harmful to organisms is damaged; boron in a treatment agent can be used for inducing the iron to more rapidly degrade the -N=N- double bond group. By applying mixed powder of the iron and the boron to sewage treatment, especially industrial wastewater containing the azo dyestuff, the material has a relatively high degradation speed and has a better sewage treatment function. Moreover, raw materials are relatively cheap an