Mixed sludge-based adsorbing material for treating dyestuff waste water

The invention discloses a mixed sludge-based adsorbing material for treating dyestuff waste water. The mixed sludge-based adsorbing material is prepared by the following steps: respectively drying pickling sludge and sewage sludge to keep the water content lower than 40wt%, grinding till the particle diameter is 0.1mm, then mixing the pickling sludge and the sewage sludge according to the mass ratio of the dry weight of (1 to 1) to (1 to 5), then carrying out carbonization under the atmosphere of nitrogen gas and at the temperature of 200-600 DEG C, then activating the carbonized mixture at the temperature of 200-600 DEG C and obtaining the mixed sludge-based adsorbing material. The mixed sludge-based adsorbing material disclosed by the invention has the beneficial effects that the pickling sludge and the sewage sludge are utilized for the first time to prepare the adsorbing material, so that not only is the problem about recycling of the picking sludge and the sewage sludge is solved,but also the adsorbing a