What is water decoloring agent and how dose it work for effluent color removal

What is water decoloring agent and how dose it work for effluent color removal

Core Working Mechanisms

1. Coagulation and Flocculation

   
   

   Most inorganic decoloring agents (e.g., ferric sulfate, polyaluminum chloride) and organic polymer decoloring agents function by neutralizing the negative charge of colored colloidal particles in water, making them aggregate into large flocs. These flocs can then be separated from water through sedimentation or filtration, achieving decolorization.
   
   
2. Adsorption

   
   

   Adsorptive decoloring agents like activated carbon, bentonite, and modified zeolite have porous structures with large specific surface areas. They can adsorb color-causing molecules (such as dyes, pigments) onto their surfaces to purify water.
   
   
3. Chemical Degradation

   
   

   Oxidative decoloring agents (e.g., hydrogen peroxide, chlorine dioxide, ozone) break down the chromophore groups in colored substances through chemical reactions, turning colored macromolecules into colorless small molecules.
   
   

Main Types of Water Decoloring Agents

Key Application Features

• High efficiency: It can quickly reduce the chromaticity of wastewater, and the decolorization rate can reach more than 90% for most dye wastewater.
• Versatility: Adapt to different types of colored water bodies, including anionic, cationic and non-ionic dye wastewater.
• Synergistic effect: When used in combination with coagulants or flocculants, it can improve the removal rate of suspended solids and COD while decolorizing.