Physical treatment method for directly adsorbing lake eutrophic water body by using natural zeolite powder

Abstract

The invention relates to a physical treatment method for directly adsorbing a lake eutrophic water body by using natural zeolite powder. The powder of 40 to 300 meshes or even less than 40 meshes is directly put into the lake eutrophic water body; the natural zeolite powder has capacity of adsorbing pollution elements and high exchange capacity, and directly adsorbs nitrogen, phosphorus, benzene, arsenic and other metal elements in the eutrophic water body; the effect of removing pollutants is better, the exchange capacity is highest and the capacity utilization rate is also highest when the particle size of the natural zeolite powder is smaller; and the powder of different particle sizes is adopted according to different types of lakes, and the characteristic that the effect is more obvious when specific surface area is larger is exerted. A practical method which saves time, labor and treatment cost, and is worthy of being selected by domestic pollution treatment enterprises, easy to implement and quick in response is provided for domestic lake eutrophication physical treatment.

Description

technical field [0001] The invention relates to a physical treatment method for natural zeolite powder to directly adsorb eutrophic water bodies in lakes Background technique [0002] Zeolite is the general term for non-metallic minerals of the zeolite group, including a series of hydrated calcium, sodium, barium, and potassium calcium silicate minerals. Zeolite is a natural and cheap mineral whose structure is a frame-like structure of aluminosilicate A salt crystal with many holes and channels inside. Zeolite has a huge specific surface area (400-800m 2 / g), and the balance cations on the zeolite framework are not tightly combined with the framework, so it is easy to exchange with the cations in water, so the zeolite has good adsorption and exchange performance. Due to different composition and origin, it can be divided into zeolite Na[ALSi 2 ]·H 2 O, calcium zeolite Ca[Al 2 Si 3 o 10 ]·H 2 O. Clinoptilolite, chabazite, sodium zeolite, stilbite and other dozens of ...

AI Technical Summary

Problems solved by technology

The cost of chemical treatment is high, and there are many residual chemical elements, so it is used in industrial production. Biological treatment, such as artificial wetlands, has remarkable purification effects, but it has huge investment, large area, and is affected by geographical features and winter and winter conditions in the north of the Yangtze River. The impact of freezing weather in early spring can not operate, and even in the southern winter after the death and decay of organisms, the maintenance cost is high, which affects and restricts the promotion and use of constructed wetlands

[0006] Physical treatment overcomes the shortcomings of the above two treatment methods. It has low treatment costs, is easy to construct, saves land resources, and has quick results, saves time, labor and investment. As far as China's national conditions are concerned, it is not restricted by geographical conditions in the north and south. Affected by environmental and climatic conditions, especially in view of the high temperature of the lake water surface in Wuhan and surrounding provinces in summer, the eutrophic water body of the lake will cause a large number of algal organisms such as blue-green algae to reproduce, and a large number of algae outbreaks will pollute the lake water body. Transparency decline, seriously affecting industrial and agricultural production and people's domestic water use, but also seriously affecting the growth and reproduction of fish in the lake