In-situ combined repair method for polluted surface water environment

Abstract

The invention discloses an in-situ combined repair method for polluted surface water environment. The in-situ combined repair method comprises the steps: (1) preparing powder zirconium modified zeolite, particle zirconium modified zeolite and powder zirconium modified bottom mud; (2) putting powder zirconium modified bottom mud into and utilizing mechanical stirring or hydraulic stirring to finishimproving surface-layer bottom mud through powder zirconium modified bottom mud; (3) sequentially adding the defined amount of the powder zirconium modified zeolite and the defined amount of the particle zirconium modified zeolite to form a bottom mud covering layer; (4) constructing a floating island system through the wrapped particle zirconium modified zeolite and a floating bed assembly. Thein-situ combined repair method disclosed by the invention has the advatanges: the zirconium modified bottom mud utilized in the in-situ combined repair method disclosed by the invention has more ecological property and environmental friendliness compared with traditional powder zirconium modified zeolite; by means of the in-situ combined repair method disclosed by the invention, synchronous preparation of the powder and particle zirconium modified zeolite is achieved; furthermore, the powder zirconium modified zeolite utilized by the in-situ combined repair method disclosed by the invention has stronger phosphorus passivating capacity; according to the in-situ combined repair method disclosed by the invention, water body in-situ repair methods of a bottom mud active covering / improving combined technology and a zirconium modified particle zeolite floating island technology are comprehensively utilized; thus, a repair effect is better, more cost-effective economic cost is achieved, and the in-situ combined repair method can be more suitable for a sustainable development idea.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an in-situ combined restoration method for a polluted surface water environment. Background technique [0002] In recent years, with the increase in the amount of pollutants discharged by humans into surface water bodies, especially the discharge of a large amount of nitrogen and phosphorus-containing wastewater generated by human activities, the eutrophication of surface water bodies has become more and more serious. Therefore, it is more and more important to research and develop efficient and economical in-situ purification methods for polluted surface water environment. At present, ecological restoration technology is the most widely used method for in-situ purification of pollutants in surface water bodies. However, there are some defects in ecological restoration, such as aquatic plants are greatly affected by the external environment, dead aqu...

AI Technical Summary

Problems solved by technology

However, the preparation method of the granular zirconium-modified zeolite proposed in this invention patent is a serious waste of zirconium, which leads to higher preparation costs of the granular zirconium-modified zeolite

In addition, the method proposed in the invention patent (application number CN201610168601.2) is mainly aimed at polluting sediment, and cannot directly purify pollutants in the overlying water of surface water bodies.

In addition, adding a large amount of powdered zirconium-modified zeolite and granular zirconium-modified zeolite to the surface water body will easily reduce the depth of the water body above the surface water body and cause water blockage, so it is urgent to find zirconium oxide directly from the surface water body / hydroxide carrier to overcome the defects of surface water depth drop caused by the application of traditional zirconium-based passivators

It can be seen that the current method of controlling the release of sediment pollutants by zirconium-based passivators at home and abroad cannot well realize the in-situ restoration of the contaminated sediment of surface water bodies and the overlying water body. The defect of zirconium-based passivator in-situ passivation technology, in order to better realize the restoration of the water environment of surface water bodies, has become an important task of water environment protection at this stage

Images