Preparation of magnesium oxide and its performance of adsorption of lead and cadmium ions

Magnesium oxide is known as a green and safe wastewater treatment agent, this paper reviews the research and application progress of magnesium hydroxide in environmental protection, including the removal of heavy metal ions such as lead, chromium and nickel in industrial wastewater and the neutralization treatment of acidic wastewater, and lists the good treatment effect of magnesium hydroxide on some actual wastewater, including its treatment effect on some special wastewater such as boron-containing wastewater and radioactive wastewater, and finally outlooks its development prospect in production and application. With the development of agriculture and industry and the expansion of urban scale, more and more wastewater containing heavy metal ions are discharged into the ecological environment, which has caused a series of environmental pollution problems. In recent years, magnesium oxide, due to its large solubility area, can be used as adsorbent in water pollution treatment has shown a broad development prospect. The use of salt lake magnesium resources to produce magnesium oxide materials, not only can get a low cost, environmentally friendly, excellent adsorption performance of adsorbent materials, but also realize the high value utilization of salt lake magnesium resources, which brings double benefits for the environment and society. In the process of preparing magnesium oxide from magnesium chloride (MgCl2-6H2O), the precipitation crystallization method is widely used because of its low energy consumption, low cost and high yield, but the prepared magnesium oxide material often shows the disadvantages of uneven grain size, small specific surface area and poor adsorption performance. The magnesium oxide was prepared by...

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