Magnesium hydroxide as the base has a unique buffer and neutralizing ability, pH value in the process of using the highest also can't more than 9, gentle neutralization process, sediment grain size is larger, the sedimentation speed, mud is easy to filter and discharge, thus reducing the silt sediment volume, reduce the processing cost. And its adsorption ability strong, active, low corrosive. These advantages make magnesium hydroxide in such as papermaking, printing and dyeing, leather, electroplating, city life sewage, and in the treatment of acidic waste water containing fluorine can be widely used。

1, the acidity of heavy metal wastewater treatment Mg (0H)2:

Due to the great specific surface area, in the treatment of heavy metal wastewater containing acid, the effect is better than the average effect of magnesium hydroxide, 5 min was basically completed, the largest adsorption capacity of 102 mg/g. At the same time, the recycling of the magnesium hydroxide after roasting, can be used repeatedly to the processing of heavy metal wastewater containing acid, in the practical wastewater treatment can improve the utilization rate of raw materials, in accordance with industry sustainable development thought. Magnesium hydroxide method and treatment of acidic waste liquid, the effect is obviously better than the limestone method, while magnesium hydroxide unit price higher than that of limestone, but because of its light weight, strong adsorption ability, active, reduced the amount of reagent, the operation cost down more than 25%; In addition, magnesium hydroxide as the base has a unique buffer and neutralizing ability, pH value in the process of using the highest also can't more than 9, gentle neutralization process, sediment grain size is larger, the sedimentation speed, mud is easy to filter and discharge, thus reducing the silt sediment volume, reduce the processing cost; Second, low magnesium hydroxide corrosive, also has a larger advantage in investment in equipment and maintenance.
2 printing and dyeing wastewater, printing and dyeing wastewater is a great harm to the environment of a kind of industrial wastewater, its emissions, composition is complex, deep chromaticity, especially all kinds of good water solubility, strong tinting dye, use the traditional management methods.

Using magnesium hydroxide treatment of printing and dyeing wastewater by taking "F charge of № looking: adsorption of anionic dye negatively charged and make the dye wastewater decolorizing, the saturated adsorption amount of direct grey dye is 2.122 g/g, the saturated adsorption amount of direct red dye up to 2.045 g/g, have good decolorizing effect on dozens of dye

3, Magnesium hydroxide, sewage wastewater treatment of phosphate can promote the growth of algae, and led to a lack of oxygen to fish, ammonium will harm Marine life.

Of the ammonium phosphate and has made the domestic each big lakes, oceans face serious eutrophication and red tide phenomenon. Magnesium hydroxide ammonium dephosphorization in addition to the effect is remarkable. According to certain proportion to join in waste water containing ammonium phosphate and magnesium hydroxide can precipitate magnesium ammonium phosphate precipitation, to remove the purpose, in the pH 10 or less. 5 condition, the removal rate of ammonia and phosphorus were 82% and 97% respectively, the sediment after filtration separation recycling of generation can also be used as fertilizer.

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