Method for preparing modified water-purifying sludge ammonia nitrogen adsorbent

The invention discloses a method for preparing a modified water-purifying sludge ammonia nitrogen adsorbent. The ammonia nitrogen adsorbent is prepared by taking water-purifying sludge from waterworks as a raw material and modifying the water-purifying sludge into a zeolite-like structure which has a loose structure, rich holes and the like. The ammonia nitrogen adsorbent is used for absorbing ammonia nitrogen. By the technical scheme, the ammonia nitrogen absorbing effect of the water-purifying sludge can be obviously improved, the ammonia nitrogen removal rate is greatly improved, and the ammonia nitrogen absorbing effect of the water-purifying sludge is approximate to that of commercial zeolite.