Magnesium hydroxide can also be applied to the environmental protection, the role of decolorization of dispose of sewage, there are specific what is going on? Below for everyone to introduce application of magnesium hydroxide in wastewater decolorizing.
In view of the pH value of 9 to 10, suspended solid concentration is 100-200 mg/L, chroma is 150-250, dyeing composition for direct fast blue, grey directly, dyeing and finishing auxiliaries, such as black water, disposal magnesium hydroxide on decoloring, analysis of solid liquid separation, the addition of magnesium salt, the influence of pH value on the decoloring effect. Results show that magnesium hydroxide with good decolorization effect.

Magnesium hydroxide adsorption and ceramic membrane microfiltration connected dispose of printing and dyeing wastewater. Findings:
(a) magnesium hydroxide adsorption disciplinary connected with ceramic membrane microfiltration dispose pairing reactive dye wastewater with disciplinary action is completely feasible in technology. Under the condition of the inevitable, 0.1 mu m and 1.0 mu m membrane decolorization rate can reach more than 98%.
(2) the appropriate punishment condition is: 600-800 mg/L, the addition of magnesium salt, 1.0 mu m film, pH value of the operation of the 11-12, 0.15 MPa pressure, cross-flow velocity for 3-5 m/s.
Link (3) of magnesium hydroxide adsorption inorganic membrane microfiltration dispose of printing and dyeing wastewater on craft have certain advantages, magnesium salts adsorption in microfiltration can be directly in the reservoir, the realization to the rapid separation of integration, and the water clear transparent, exists as the possibility of printing and dyeing water acquisition to exercise.

In addition, the magnesium salt as disposal agent for acid blue and blue/red waste water, waste water contain a variety of printing and dyeing auxiliaries, containing active BP, reactive orange red K - 2 - designed.the GN, reactive purple K - 3 K R mixed dye wastewater such as decoloring disposition, has a good decolorizing effect.
Under the same conditions, the decolorizing effect of magnesium salt method is more ideal than iron method, the main reason lies in the iron law of residual iron oxygen consumption, thus reduce the turbidity of dissolved oxygen, progress to discharge liquid instead of research and development will not be any impact on the environment. Analysis of magnesium hydroxide (directly, alkaline and acidic) for water-soluble dye adsorption law, found that the magnesium hydroxide can be effectively these dye adsorption.