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Preparation method of flocculating agent for environmental hormone polluted underground water

A technology of environmental hormones and groundwater, applied in the field of water pollution control, can solve the problems of limited removal effect of environmental hormone pollutants, achieve the effect of improving removal effect and reducing molecular quality

Active Publication Date: 2021-08-27
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional water treatment methods have very limited removal effects on trace environmental hormone pollutants in water bodies. For example, Chinese invention patent CN101700923A discloses a method for removing environmental hormone dimethyl phthalate in water bodies, but this method can only Remove 60-70% of dimethyl phthalate in water, so in order to better remove trace environmental hormone pollutants in water, it is necessary to develop a preparation method for flocculants that pollute groundwater with environmental hormones

Method used

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  • Preparation method of flocculating agent for environmental hormone polluted underground water

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A preparation method of a flocculant for environmental hormones polluting groundwater, comprising the following steps:

[0024] A. Using dimethyl diallyl ammonium chloride monomer as raw material, add metal ion chelating agent, persulfate and high-temperature initiator successively at 22 ° C, and feed nitrogen to remove the air in the reactor;

[0025] B. Raise the temperature to 58°C for 1.8 hours;

[0026] C. Add ethylene glycol and raise the temperature to 62°C for 1.2 hours;

[0027] D. Adjust the temperature to 38°C, add hydrogel, keep warm for 4.5 hours, concentrate and spray dry.

[0028] The metal ion chelating agent is disodium edetate; the persulfate is ammonium persulfate; and the high-temperature initiator is benzoyl peroxide.

[0029] The added amounts of the metal ion chelating agent, persulfate and high-temperature initiator are respectively 0.007%, 1.25% and 0.06% of the monomer mass.

[0030] In the step C, the added amount of the ethylene glycol is ...

Embodiment 2

[0034] A preparation method of a flocculant for environmental hormones polluting groundwater, comprising the following steps:

[0035] A. Using dimethyl diallyl ammonium chloride monomer as raw material, add metal ion chelating agent, persulfate and high-temperature initiator successively at 25 ° C, and feed nitrogen to remove the air in the reactor;

[0036] B. Heat up to 55°C for 2 hours;

[0037] C. Add ethylene glycol and raise the temperature to 60°C for 1.5 hours;

[0038] D. Adjust the temperature to 35°C, add hydrogel, keep warm for 5 hours, concentrate and spray dry.

[0039] The metal ion chelating agent is tetrasodium edetate; the persulfate is sodium persulfate; and the high-temperature initiator is benzoyl peroxide.

[0040] The added amounts of the metal ion chelating agent, persulfate and high-temperature initiator are respectively 0.001%, 1.5% and 0.005% of the monomer mass.

[0041] In the step C, the added amount of the ethylene glycol is 5% of the monomer...

Embodiment 3

[0045] A preparation method of a flocculant for environmental hormones polluting groundwater, comprising the following steps:

[0046] A. Using dimethyl diallyl ammonium chloride monomer as raw material, add metal ion chelating agent, persulfate and high-temperature initiator successively at 15 ° C, and feed nitrogen to remove the air in the reactor;

[0047] B. Raise the temperature to 60°C for 1.5 hours;

[0048] C. Add ethylene glycol and heat up to 65°C for 1 hour;

[0049] D. Adjust the temperature to 40°C, add hydrogel, keep warm for 3 hours, concentrate and spray dry.

[0050] The metal ion chelating agent is disodium edetate; the persulfate is sodium persulfate; and the high-temperature initiator is benzoyl peroxide.

[0051] The added amounts of the metal ion chelating agent, persulfate and high temperature initiator are respectively 0.010%, 0.25% and 0.075% of the monomer mass.

[0052] In the step C, the added amount of the ethylene glycol is 10% of the monomer m...

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Abstract

The invention discloses a preparation method of a flocculating agent for environmental hormone polluted underground water, which comprises the following steps: by taking a dimethyl diallyl ammonium chloride monomer as a raw material, adding a metal ion chelating agent, persulfate and a high-temperature initiator, introducing nitrogen, carrying out heating reaction, then adding a chain transfer agent ethylene glycol, continuing heating reaction, finally adding hydrogel, performing heat preservation reaction, and performing concentration and spray drying. According to the preparation method of the flocculating agent, on the basis of a traditional preparation method of the flocculating agent poly dimethyl diallyl ammonium chloride, the molecular mass of a product is reduced by adding the chain transfer agent ethylene glycol, meanwhile, due to the fact that the molecular mass of the product is reduced, the product can be better combined with the added hydrogel, and the removal effect on environmental hormones is good; and the adopted hydrogel is cross-linked hydrogel based on polyamino acid molecules, has the characteristics of high mechanical strength and good binding degree with poly dimethyl diallyl ammonium chloride, and has a good removal effect on environmental hormones.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a preparation method of a flocculant for environmental hormones polluting groundwater. Background technique [0002] The advantage of inorganic flocculant is that it is relatively economical and easy to use; however, it has the disadvantages of large dosage, low flocculation effect, high cost and strong corrosion. Organic polymer flocculant is a new type of wastewater treatment agent developed in the late 1960s. Compared with traditional flocculants, it can double the efficiency and lower the price, so it tends to gradually become the mainstream agent. Coupled with stable product quality, the production of organic polymer flocculants has accounted for 30-60% of the total flocculant production. Certain natural high molecular organic substances such as polysaccharides with more carboxyl groups and starches with more phosphate groups have flocculation properties. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08F126/04C08F2/38C02F101/30C02F103/06
CPCC02F1/56C08F126/04C08F2/38C02F2101/305C02F2103/06
Inventor 张永利卢铭洛
Owner FOSHAN UNIVERSITY
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