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Lake endogenesis control brick and use method thereof

A technology for lakes and bricks, applied in the field of endogenous control materials, can solve the problems of introducing a large amount of pollutants and low removal efficiency of pollutants, and achieve the effects of reducing nutrient release, improving colonization ability, and improving chemical properties

Active Publication Date: 2015-03-25
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the composite materials used to eliminate lake internal pollution in the prior art have low pollutant removal efficiency and introduce a large amount of foreign substances, and then provide a low-cost, high pollutant removal efficiency. , a lake endogenous control brick that is beneficial to the restoration of the ecosystem and does not produce new foreign substances and its use method

Method used

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  • Lake endogenesis control brick and use method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The lake endogenous control brick body described in this embodiment is prepared by the following method:

[0033] (1) Get the bottom mud in Erhai Lake, Yunnan, adopt the SMT method to record the phosphorus content in the bottom mud is 800mg / Kg, adopt the microwave digestion ICP-OES method to record the iron content in the bottom mud is 90mg / Kg;

[0034] (2) Add ferric nitrate and mix uniformly in the bottom mud, so that the ratio of the molar sum of the iron in the ferric nitrate and the iron in the bottom mud to the molar number of phosphorus in the bottom mud is 6:1;

[0035] (3) The mixture of step (2) is aired, and when the water content is 50wt%, the mixture is made into adobe, the length of the adobe is 15cm, the width is 9cm, and the height is 3.5cm;

[0036] (4) Drying the adobe in the shade for 2 days and then calcining it for 2.5 hours at a calcination temperature of 950°C; the moisture content after drying in the shade is 18wt%;

[0037] (5) Get 6 planting ...

Embodiment 2

[0042] The lake endogenous control brick body described in this embodiment is prepared by the following method:

[0043] (1) Get the bottom mud in Erhai Lake, adopt the SMT method to record the phosphorus content in the bottom mud is 1200mg / Kg, adopt the microwave digestion ICP-OES method to record the iron content in the bottom mud is 60mg / Kg;

[0044] (2) Add iron oxalate and mix uniformly in the bottom mud, so that the ratio of the molar number of iron in the iron oxalate and the iron in the bottom mud to the molar number of phosphorus in the bottom mud is 8:1;

[0045] (3) The mixture of step (2) is aired, and when the water content is 55wt%, the mixture is made into adobe, the length of the adobe is 14cm, the width is 11cm, and the height is 3cm;

[0046] (4) Drying the adobe in the shade for 3 days and then calcining it for 2.5 hours at a temperature of 900° C.; the moisture content after drying in the shade is 22 wt %;

[0047](5) Get 4 planting holes on the upper sur...

Embodiment 3

[0052] The lake endogenous control brick body described in this embodiment is prepared by the following method:

[0053] (1) Get the bottom mud in Erhai Lake, adopt the SMT method to record the phosphorus content in the bottom mud is 800mg / Kg, adopt the microwave digestion ICP-OES method to record the iron content in the bottom mud is 30mg / Kg;

[0054] (2) Add ferric citrate and mix uniformly in the bottom mud, so that the sum of the moles of iron in the iron citrate and the iron in the bottom mud is equal to the molar number of phosphorus in the bottom mud The ratio is 7:1;

[0055] (3) The mixture of step (2) is aired, and when the water content is 60wt%, the mixture is made into adobe, the length of the adobe is 13cm, the width is 10cm, and the height is 2.5cm;

[0056] (4) Drying the adobe in the shade for 2.5 days and then calcining it for 3 hours at a temperature of 850° C.; the moisture content after drying in the shade is 20 wt %;

[0057] (5) Five planting holes are...

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Abstract

The invention provides a lake endogenesis control brick and a use method thereof. The brick is prepared by steps as follows: (1), bottom sediment of a lake is taken, and content of iron and phosphorus in the bottom sediment is measured; (2), iron salt is added to the bottom sediment and mixed; (3), a mixture obtained from step (2) is air-dried, and a green brick is prepared from the mixture when the moisture content is 50 wt%-60 wt% after air-drying; (4), the green brick is dried in the shade for 2-3 days and then sintered; (5), a plurality of planting holes are punched in the sintered brick; and (6), submerged plants are planted in the planting holes, and the lake endogenesis control brick is obtained. After the lake endogenesis control brick is placed in the lake, the shearing force of bottom water and disturbance of water flowing to sediment can be reduced, so that release of nutrient salt suspended on the sediment is reduced, the chemical property of the sediment-water interface can be effectively improved by adjusting iron-phosphorus ratio of the sediment water interface, stability of phosphorus in the sediment is improved, and the planting and amplification capability of the submerged plants is enhanced.

Description

technical field [0001] The invention belongs to the field of water environment pollution control, and specifically relates to an endogenous control material capable of controlling the release of endogenous nitrogen and phosphorus in sediments by using biological, physical and chemical techniques and a method for using the same. Background technique [0002] Eutrophication of lakes is an important environmental problem that is concerned at home and abroad today. Eutrophication is mainly a series of ecological and environmental problems caused by excess nutrients in the water body. Sediments are not only the source of nutrients but also the sink of nutrients. After the source is effectively controlled, the endogenous release of sediments is an important factor affecting the concentration of nutrients in lake water. [0003] The lake internal source control method in the prior art is mainly to dredge the sediment in the lake or to use aquatic organisms to enrich and transfer th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/30
CPCC02F3/308C02F3/32C02F2101/105C02F2101/16C02F2103/007
Inventor 王圣瑞赵海超焦立新张莉
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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