| abstract |
The invention provides a printing and dyeing wastewater treatment method, which specifically comprises the following steps: filtration, acid-base adjustment, coagulation and sedimentation, degradation, adsorption, decolorization, pH adjustment, sand filtration and carbon filtration, discharge or reuse; The modified composite resin microspheres are combined with hydrogen peroxide as a Fenton-like reagent to oxidatively degrade the refractory organic pollutants through the generated hydroxyl radicals; the adsorption is to use the composite resin microspheres to modify the polyvinyl alcohol membrane through ion exchange, coordination Effect and electrostatic effect to remove heavy metal ions in sewage. The printing and dyeing wastewater treatment method of the invention solves the shortcomings of the traditional ion exchange resin with small pore size and large ion diffusion resistance, and also solves the problems that the traditional Fenton reaction catalyst is not easy to recover and causes secondary pollution, and can efficiently degrade organic matter and adsorb heavy metal ions. Large quantity, simple operation and no secondary pollution. |