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A flocculation-oxidation composite material for improving the water quality of black and odorous water bodies

A black and odorous water body and composite material technology, applied in water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as no turbidity removal method, and achieve an increase in redox potential , reduce chroma, simple preparation method

Active Publication Date: 2021-10-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, reducing the turbidity of black and odorous water is extremely important to control black and odorous water, but in the existing technology, there is no method for turbidity removal

Method used

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  • A flocculation-oxidation composite material for improving the water quality of black and odorous water bodies
  • A flocculation-oxidation composite material for improving the water quality of black and odorous water bodies
  • A flocculation-oxidation composite material for improving the water quality of black and odorous water bodies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of flocculation-oxidation composite material, the preparation raw material is bentonite: CaO 2 : LaCl 3 =8:2:1.

[0029] The preparation method is the grinding method: take 0.8g of bentonite, CaO 2 0.2g, LaCl 3 0.1g, namely set bentonite, CaO 2 and LaCl 3 The mass ratio is 8:2:1, and the above raw materials are ground in an agate mortar to make them completely and uniformly mixed to obtain a flocculation-oxidation composite material.

[0030] The as-prepared flocculation-oxidation composites were characterized as figure 2 shown. figure 2 (a) is a photograph of the appearance of the composite material, from which it can be seen that the prepared flocculation-oxidation composite material is light yellow powder. figure 2 (b) is the Fourier transform infrared spectrum of the composite material, which shows that bentonite and CaO 2 It is a single composite material combined by physical force, the ion configuration of bentonite does not change, CaO 2 Ther...

Embodiment 2

[0038] A flocculation-oxidation composite material, the material ratio is bentonite: CaO 2: LaCl 3 =8:2:1.

[0039] The preparation method is sodium alginate embedding method: use deionized water to prepare 100ml containing 3% sodium alginate, 2% bentonite, 0.5% CaO 2 , 0.25% LaCl 3 mixed solution. Then slowly drop the mixed solution into 3% CaCl with a mass concentration of 10ml 2 In the solution, it is fixed into black pellets with a diameter of 3-5 mm. Dilute the pellet in CaCl 2 After cross-linking in solution for 8 hours, filter to keep pellets. The pellets were then dried in an oven at 105 °C for 1 h to constant weight to obtain a composite material.

[0040] Mix the obtained composite material with deionized water to configure 100g L -1 Add 2ml of suspension solution to 100ml of black and odorous water, at room temperature at 300r·min -1 Stir at a stirring speed for 3min, then at 50r·min -1 Stir at a stirring speed for 10 minutes and let stand for 30 minutes. ...

Embodiment 3

[0046] A kind of flocculation-oxidation composite material, the preparation raw material is bentonite: CaO 2 : LaCl 3 =8:4:1.

[0047] The preparation method is the grinding method: take 0.8g of bentonite, CaO 2 0.4g, LaCl 3 0.1g, set bentonite, CaO 2 and LaCl 3 The mass ratio is 8:4:1, and the above raw materials are ground in an agate mortar to make them completely and uniformly mixed to obtain a composite material. Mix the obtained composite material with deionized water to configure 100g L -1 Add 2ml of suspension solution to 100ml of black and odorous water, at room temperature at 300r·min -1 Stir at a stirring speed for 3min, then at 50r·min -1 Stir at a stirring speed for 10 minutes and let stand for 30 minutes. Take the supernatant to measure the water quality parameters.

[0048] The effect of the flocculation-oxidation composite material obtained in this embodiment on water quality is shown in Table 4:

[0049] Table 4 Water quality parameters after addin...

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Abstract

The invention discloses a flocculation-oxidation composite material for improving the water quality of black and odorous water bodies, and belongs to the technical field of water treatment. In the treatment technology of black and odorous water bodies, reducing the turbidity of black and odorous water bodies is extremely important for the treatment of black and odorous water bodies, but in the existing technology, there is no method for removing turbidity. The present invention uses bentonite, calcium peroxide and lanthanum chloride as raw materials to prepare the flocculation-oxidation composite material, which can quickly reduce the turbidity of black and odorous water in a short time, and lanthanum chloride effectively eliminates the turbidity of bentonite on the water surface during use. The problem of forming white foam, the black and odorous water body after treatment is transparent and colorless, and the flocculation-oxidation composite material in the present invention can effectively reduce the chroma, odor, and total phosphorus of the water body, and improve the dissolved oxygen and redox potential of the water body, The overall water quality can reach the second-class standard of surface water.

Description

technical field [0001] The invention relates to a flocculation-oxidation composite material for improving the water quality of black and odorous water bodies, and belongs to the technical field of water treatment. Background technique [0002] With the development of the economy, the water quality of the river waters is deteriorating day by day, forming a large area of ​​black and odorous water bodies. With the announcement of the "Water Ten Measures", the emphasis on national policies, and the improvement of citizens' awareness of environmental protection, the treatment of black and odorous water bodies is imminent. When black odor erupts in the water body, it will cause bad social impact, so it needs to be dealt with urgently. [0003] The flocculation and sedimentation method is efficient and simple, and it is a common method for removing turbidity, color and various toxic and harmful pollutants in water. Most of the flocculants commonly used in water treatment are poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/72
CPCC02F1/5236C02F1/722C02F2103/007
Inventor 马欢欢李雨平周倩刘文博邓芸缪恒锋王丽红阮文权
Owner JIANGNAN UNIV
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