CN-122010303-A - Construction method and device of artificial wetland ecological buffer zone

CN122010303ACN 122010303 ACN122010303 ACN 122010303ACN-122010303-A

Abstract

The invention belongs to the technical field of pollution treatment, and particularly relates to a construction method and a construction device of an ecological buffer zone of an artificial wetland. Compared with the prior art, the construction method of the artificial wetland ecological buffer zone provided by the invention has the advantage that denitrification and desulfurization and heavy metal stabilization reactions are completed in the first reduction layer of the electrolytic cell. In addition, the iron-rich biochar is matched with an engineering microbial inoculum, 70% of chlorinated aromatic hydrocarbon is removed within 25 days, and compared with the traditional natural biodegradation removal rate, the removal rate is improved by 60%.

Inventors

WANG LEI
LIU JIN
LI SHAOFENG
SHI CHUNMING
WANG XIAOSHU
WANG YANGYANG
WANG JINSHENG
XI BEIDOU

Assignees

深圳职业技术大学

Dates

Publication Date: 20260512
Application Date: 20251107
Priority Date: 20241109

Claims (10)

1. The construction method of the artificial wetland ecological buffer zone is characterized in that the artificial wetland sequentially comprises the following steps from top to bottom: The first reduction layer of the electrolytic cell comprises an electrolytic cathode, wherein the first reduction layer of the electrolytic cell is filled with soil, steel slag and charcoal filler, DHC engineering bacteria agent is added in the first reduction layer of the electrolytic cell, and plants are planted on the surface of the first reduction layer of the electrolytic cell; The electrolytic cell oxidation layer comprises an electrolytic anode, wherein the electrolytic cell oxidation layer is filled by Hangjin soil and a sodium bentonite pad; the second reduction layer of the electrolytic cell comprises an electrolytic cathode, wherein the second reduction layer of the electrolytic cell is filled with steel slag and charcoal filler; The fuel cell comprises a fuel cell reduction layer, an engineering bacteria agent and a protective layer, wherein the fuel cell reduction layer is filled with aluminosilicate filler; And the fuel cell oxide layer is filled with sand and metal-rich biochar.
2. The construction method of the artificial wetland ecological buffer zone according to claim 1, wherein the thicknesses of the first reduction layer of the electrolytic cell, the oxidation layer of the electrolytic cell, the second reduction layer of the electrolytic cell, the reduction layer of the fuel cell and the oxidation layer of the fuel cell are all 20cm; plastic electrodes are respectively arranged on the first reduction layer, the oxidation layer, the second reduction layer, the fuel cell reduction layer and the fuel cell oxidation layer, the electrodes in the fuel cell reduction layer and the fuel cell oxidation layer are connected by leads and capacitors, and power is supplied to the first reduction layer, the oxidation layer and the second reduction layer.
3. The method for constructing the ecological buffer zone of the constructed wetland according to claim 2, wherein in the first reduction layer of the electrolytic cell, the particle size of the soil, the steel slag and the charcoal filler is 0.10-0.30mm, and the mixing ratio is 5:1:4-8:1:1.
4. The construction method of the artificial wetland ecological buffer zone according to claim 2, wherein in the electrolytic cell oxide layer, the particle size of the Hangjin soil and the sodium bentonite pad is 1-3mm, and the mixing ratio is 1:2-1:5.
5. The method for constructing the ecological buffer zone of the constructed wetland according to claim 2, wherein in the second reduction layer of the electrolytic cell, the grain size of the steel slag and the charcoal filler is 5-8mm, and the mixing ratio is 1:4-1:10.
6. The method for constructing an artificial wetland ecological buffer zone according to claim 2, wherein in the fuel cell reduction layer, the particle size of the aluminosilicate filler is 3-5mm.
7. The method for constructing an artificial wetland ecological buffer zone according to claim 2, wherein in the fuel cell oxide layer, the particle size of the sand and the metal-rich biochar is 1-3mm, and the mixing ratio is 1:5-1:10.
8. The construction method of the artificial wetland ecological buffer zone according to claim 2, wherein the metal-rich biochar is prepared by the following method: planting Siberian iris plant in solution of zinc chloride supplemented with one or more of copper chloride, cerium chloride, ferric chloride and manganese chloride, culturing for two months, harvesting, drying, pulverizing, and calcining to obtain biochar loaded with monoatomic metal or coordinated metal.
9. The method for constructing an ecological buffer zone of an artificial wetland according to claim 2, wherein in the fuel cell reduction layer, the engineering bacteria are ammonia oxide anaerobe, sulfate reducing bacteria and geobacillus, and the mixing ratio is 2:5:3.
10. An artificial wetland ecological buffer zone device, which is characterized by being constructed by the construction method of the artificial wetland ecological buffer zone according to any one of claims 1-9.

Description

Construction method and device of artificial wetland ecological buffer zone Technical Field The invention belongs to the technical field of pollution treatment, and particularly relates to a construction method and a construction device of an artificial wetland ecological buffer zone. Background In recent decades, heavy metal pollution has become a very serious concern worldwide, and heavy metal pollution causes soil pollution, diffusion pollution, and causes serious environmental problems such as soil, river, and the like. Unlike other pollution, soil pollution tends to be more difficult to treat because heavy metals tend to remain in the soil for long periods of time, causing toxic damage to plants and animals. Contaminated soil cannot be used for crop re-planting, feed production and recovery of forest vegetation, which can lead to deterioration of ecological environment and even desertification. At present, an ecological buffer zone is a water and soil conservation treatment measure, and is a three-dimensional plant zone which is established at the junction of a river channel and land and combines arbor and shrub. This area can play the cushioning effect, control air, soil and water quality, mainly aims at the land problem in the agricultural view simultaneously. The buffer belt can catch sediment and enhance the filtration of nutrient substances by slowing down runoff, thereby controlling the pollution of non-point sources and protecting and improving the water quality. However, the existing ecological buffer zone has no obvious effect on removing macromolecular organic pollutants and heavy metals (such as Cr and the like). At present, how to construct an ecological buffer zone capable of removing macromolecular organic pollutants and heavy metals is a primary task for guaranteeing ecological flow of rivers and lakes and maintaining health of a water ecological system. In view of this, the present invention has been made. Disclosure of Invention The invention aims to provide a construction method and a construction device of an artificial wetland ecological buffer zone, which are used for solving the technical problems in the background art. In order to achieve one of the above objects, the present invention provides the following technical solutions: the construction method of the ecological buffer zone of the constructed wetland comprises the following steps of from top to bottom: The first reduction layer of the electrolytic cell comprises an electrolytic cathode, wherein the first reduction layer of the electrolytic cell is filled with soil, steel slag and charcoal filler, DHC engineering bacteria agent is added in the first reduction layer of the electrolytic cell, and plants are planted on the surface of the first reduction layer of the electrolytic cell; The electrolytic cell oxidation layer comprises an electrolytic anode, wherein the electrolytic cell oxidation layer is filled by Hangjin soil and a sodium bentonite pad; the second reduction layer of the electrolytic cell comprises an electrolytic cathode, wherein the second reduction layer of the electrolytic cell is filled with steel slag and charcoal filler; The fuel cell comprises a fuel cell reduction layer, an engineering bacteria agent and a protective layer, wherein the fuel cell reduction layer is filled with aluminosilicate filler; And the fuel cell oxide layer is filled with sand and metal-rich biochar. Preferably, the thickness of the first reduction layer of the electrolytic cell, the oxidation layer of the electrolytic cell, the second reduction layer of the electrolytic cell, the reduction layer of the fuel cell and the oxidation layer of the fuel cell is 20cm. Preferably, in the first reduction layer of the electrolytic cell, the particle size of the soil, the steel slag and the charcoal filler is 0.10-0.30mm, and the mixing ratio is 5:1:4-8:1:1. Preferably, in the electrolytic cell oxidation layer, the particle size of the Hangjin soil and the sodium bentonite pad is 1-3mm, and the mixing ratio is 1:2-1:5. Preferably, in the second reduction layer of the electrolytic cell, the grain size of the steel slag and the charcoal filler is 5-8mm, and the mixing ratio is 1:4-1:10. Preferably, in the fuel cell reduction layer, the aluminosilicate filler has a particle diameter of 3 to 5mm. Preferably, in the fuel cell oxide layer, the particle size of the sand and the metal-rich biochar is 1-3mm, and the mixing ratio is 1:5-1:10. Preferably, the metal-rich biochar is prepared by the following method: planting Siberian iris plant in solution of zinc chloride supplemented with one or more of copper chloride, cerium chloride, ferric chloride and manganese chloride, culturing for two months, harvesting, drying, pulverizing, and calcining to obtain biochar loaded with monoatomic metal or coordinated metal. Preferably, in the fuel cell reduction layer, the engineering bacteria are ammonia oxide anaerobe, sulfate reducing bacteria and geobacill