How does magnesium hydroxide deal with cadmium-containing sewage?
Magnesium hydroxide in the treatment of cadmium containing sewage? Specific treatment methods below to give you a detailed introduction. Magnesium hydroxide as a new type of water treatment agent, its adsorption capacity is strong, non-corrosive, non-toxic, harmless, easy to rain and storage, safe operation, strong acid wastewater treatment pH value is less than 9, the effluent reaches the national emission standards, can be used as caustic soda,
Magnesium hydroxideWhat about the treatment of cadmium-containing sewage? The specific treatment methods are described in detail below.
As a new type of water treatment agent, magnesium hydroxide has strong adsorption capacity, non-corrosive, non-toxic, harmless, easy to rain and storage, safe operation, strong acid wastewater treatment after the pH value is less than 9, the effluent reaches the national emission standards, and can be used as an ideal substitute for caustic soda, soda ash, and other lime alkaline materials. The following small series to introduce the principle of magnesium hydroxide treatment of cadmium containing wastewater.
In recent years, the treatment of printing and dyeing wastewater with magnesium oxide or magnesium salt, nitrogen and phosphorus removal, lead removal, etc. have been reported. In this paper, the wastewater containing low concentration of cadmium magnesium hydroxide, discusses the mechanism and influencing factors and treatment of wastewater treatment, the experiment in the actual industrial wastewater, the removal rate of the method is high, the effluent can meet the national discharge standards of cadmium. Magnesium hydroxide recovery, light burning treatment, with cadmium-containing wastewater treatment, the effect is still significant, and can be used many times.
This is because magnesium hydroxide first neutralizes acidic wastewater and can remove cadmium ions. From the point of view of chemical equilibrium, the cadmium ions in magnesium hydroxide wastewater can be converted into cadmium hydroxide precipitation, therefore, when the magnesium hydroxide particles around the adsorption of cadmium ions can be removed. The amount of magnesium hydroxide is too small to meet the emission standards, and excessive suspended solids and garbage are not easy to settle. Therefore, the actual sewage treatment amount is calculated according to the actual experimental operation. In chemical experiments, an important factor of temperature will also affect the experimental results. The effect of working temperature change on the treatment of wastewater containing cadmium hydroxide is not significant, but it can be reduced to below the cadmium ion, the national discharge standard, and the sewage treatment can choose room temperature.
The above is about the principle of magnesium hydroxide treatment of cadmium-containing wastewater, hoping to help everyone.
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Everyone knows that there are two common flame retardants. Today we are going to talk about only one of them. Aluminum hydroxide flame retardant is an environmentally friendly halogen-free flame retardant, which can be widely used in fabrics, wood, plastics, and rubber., Polyurethane and other industries have ideal flame retardant effect. In the process of industrial application, it is found that flame retardant failure occurs when aluminum hydroxide flame retardant is added. The following are the reasons for the failure of aluminum hydroxide flame retardant, how to prevent it, how to deal with the operation, and restore the original function.
As a flame retardant, magnesium hydroxide also need to improve what aspects?
When it comes to flame retardants, everyone is familiar with them. Although we usually have less contact with them, we can know what they are used for from the name. Have to talk about magnesium hydroxide, we all know that its main presentation state is a granular, at present, the market sales of magnesium hydroxide particle size is larger, part of the commodity particle size up to tens of microns, immediately used as a flame retardant, poor dispersion, the physical properties of raw materials greater harm. In industrial production, physical grinding methods are generally used to reduce the particle size to 1 micron. The surface of magnesium hydroxide has high polarity and is easy to agglomerate. As the compatibility of refractory materials and polymer substrates, it not only reduces its flame retardant grade, but also causes more serious harm to the physical properties of raw materials.
Hefei Zhongke Flame Retardant New Material Co., Ltd
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