Method for efficient removal of heavy metals in farmland irrigation water by plant pond, constructed wetland and adsorption tank

A technology for artificial wetlands and farmland irrigation, which is applied in the field of agriculture and farmland, can solve the problems of variable water quality, large demand, and complicated pollution sources, and achieve the effect of reducing heavy metal content and strong cadmium absorption capacity
CN106977062AInactive Publication Date: 2017-07-25HUNAN AGRICULTURAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUNAN AGRICULTURAL UNIV
Publication Date
2017-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for efficient removal of heavy metals in farmland irrigation water by a plant pond, a constructed wetland and an adsorption tank. The method is mainly characterized in that farmland in which natural water inlet and outlet can be realized by difference of elevation is selected according to farmland irrigation ditch distribution conditions to form a 'plant pond, constructed wetland and adsorption tank' integrated purification process, aquatic plants such as typha and hydrilla are planted in the plant pond and the constructed wetland, and the adsorption tank is filled with industrial and agricultural wastes such as straws high in heavy metal adsorption capacity to purify heavy metal pollution in the farmland irrigation water. The aquatic plants can not only prevent short circuit of water flow but also improve purification efficiency; the adsorption tank can further improve purification efficiency to guarantee that heavy metals in the farmland irrigation water reach the standard. By adoption of the method, heavy metal pollution in the farmland irrigation water can be efficiently eliminated while pollution of N, P and the like can be cleared, and the heavy metal content of the farmland irrigation water can reach the standard all year round.
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Description

technical field

[0001] The present invention relates to farmland irrigation water purification technology, in particular to a method for efficiently removing heavy metals in farmland irrigation water by using plant ponds + artificial wetlands + adsorption ponds. Plants, floating plants, submerged plants) and straw and other safe, cheap, easy-to-get, high-efficiency, and strong cadmium-absorbing industrial and agricultural wastes are used to construct a purification process of plant ponds + artificial wetlands + adsorption pools. Background technique

[0002] Farmland irrigation water has special uses, complex sources of pollution, wide range of pollution, variable water quality, low content of heavy metals, and large and concentrated demand. The purification process must be green, environmentally friendly, fast, efficient, and low-cost. Some heavy metal sewage purification facilities, processes, materials and technologies are not suitable for the purification of heavy me...

Claims

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