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A method of using fennel to restore cadmium pollution in eutrophic water

A technology of eutrophication and cadmium pollution, applied in the field of polluted environment remediation, can solve problems such as difficult implementation of water body, secondary pollution of water body, etc., achieve the effect of complete removal, improvement of ecological conditions, and reduction of eutrophication degree

Active Publication Date: 2017-05-24
SHAOGUAN COLLEGE
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Problems solved by technology

When the dosage of grass ash is 1g / L and the pH is 7.2, the removal rate of cadmium ion is 93%. However, while removing cadmium, on the one hand, it involves the problem of secondary pollution to water body
At the same time, it also involves the problem that it is difficult to implement for large-scale polluted water bodies

Method used

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Embodiment Construction

[0022] Now in conjunction with embodiment, the present invention is further described:

[0023] A method for repairing cadmium pollution in eutrophic water by utilizing fennel, the specific technological process is as follows:

[0024] ①Sowing and raising seedlings:

[0025] In a plastic greenhouse, river sand is used as the substrate, and fennel seedling is carried out, and the suitable temperature for seedling is 20-25 ℃.

[0026] The river sand should be rinsed with clean water first, drenched with water, and placed in a vegetable seedling flat plate with a thickness of 3cm.

[0027] Fennel seeds were soaked at 55°C for 30 minutes, continued to soak for 6 hours, the seeds were removed, and the water was drained.

[0028] The drenched seeds were evenly sown on the river sand on the seedling flat plate, and then covered with 1.5cm of river sand, and the amount of seeds per m² was 50g.

[0029] Cover with black shade net after sowing, and spray moisturizing according to wea...

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Abstract

The invention discloses a method for remedying cadmium pollution in a eutrophic water body with fennel. The method comprises the concrete technological process steps as follows: sowing and seedling raising; water planting and hardening; field planting of floating beds; fixing of floating beds; and fennel harvesting. Through the method, heavy metal cadmium ions accumulated in the water body can be absorbed sustainably so as to remedy the cadmium-polluted water body, the eutrophication degree of the water body can be reduced continuously, and meanwhile, a plant landscape element is added to the polluted water body to improve the ecological condition of the polluted water body.

Description

technical field [0001] The invention relates to the technical field of remediation of polluted environments, in particular to a method for remediating cadmium pollution in eutrophic water bodies by using fennel. Background technique [0002] Cadmium pollution in water bodies mainly comes from surface runoff and industrial wastewater. The commonly used treatment methods for cadmium-polluted water bodies are precipitation (sulfide, hydroxide) and adsorption. However, the precipitation method can only form highly stable insoluble cadmium hydroxide under alkaline conditions, and the cadmium removal effect is good. Although the activated carbon adsorption method has the characteristics of strong adsorption, large specific surface area and high removal efficiency, it is expensive; alternatives such as grass ash, weathered coal, and sulfonated coal are used. efficiency. According to reports, for wastewater containing lead, cadmium, zinc and other ions with a concentration of 20m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F101/20
CPCA01G31/00C02F3/32C02F2101/20
Inventor 肖艳辉何金明
Owner SHAOGUAN COLLEGE
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