Method for treating algal bloom by using modified attapulgite as flocculant

Abstract

The invention discloses a method for treating algal bloom by using modified attapulgite as flocculant, comprising the following steps: dipping the attapulgite powder into hydrochloric acid for 23-25h according to the ratio of solid to liquid being 1-3:2-4, drying, pulverizing into powder to obtain flocculant; adding the flocculant into algae water, stirring, standing, and then removing algae floc by a filtering or spooning method. The invention can effectively adsorb flocculating algae, thereby being convenient to remove algae floc by the filtering or spooning method, and having obvious effect on removing nitrogen and phosphorus in water body; the method can treat both the principal and secondary aspects, fundamentally removes danger caused by algal bloom storm, and has low cost, thereby having great application value and market potential.

Description

technical field [0001] The invention relates to the field of bio-environmental protection materials, in particular to a method for controlling algal blooms with modified attapulgite as a flocculant. Background technique [0002] In recent years, algal blooms in my country's lakes have frequently broken out and become more severe, which has caused inconvenience to human production and life, seriously affected social and economic development, and has become an ecological disaster. The main nutrient elements that cause algal bloom outbreaks are nitrogen and phosphorus in water, especially phosphorus plays a key role. At present, the more popular methods of removing algae blooms can be roughly attributed to physical methods, chemical methods and biological methods: [0003] Physical method: Physical method (such as high-voltage ionization, high-voltage pulse, alternating strong magnetic field, ultraviolet light, ultrasonic wave, etc.) is to convert electrical energy into chemic...

AI Technical Summary

Problems solved by technology

However, the biological method, especially the method of ecological restoration, is an important method for the prevention and control of algal blooms in a small area and in a fixed area, but this type of method often requires a huge investment in artificial engineering in advance to create and control the aquatic plants required to inhibit algal blooms ( For example, it is difficult for submerged plants to survive in the water bottom with low transparency or lack of suitable sediment) or the living conditions of animals, so the effect is slow and the cost is high, so it is difficult to be generally applicable to the treatment of large-scale and sudden algal blooms

[0006] Although the above methods can relieve algal blooms to a certain extent, they have problems such as high cost, inconvenient operation, or secondary pollution, which have become bottlenecks restricting their large-scale application.