Organic polymer heavy metal chelating flocculant as well as preparation method and application thereof

An organic polymer and heavy metal technology, applied in the polymer field, can solve the problems of unsatisfactory effect, slow reaction rate, high cost, etc., and achieve the effect of no secondary pollution risk, easy control, and reduced dosage

Active Publication Date: 2015-05-27
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this heavy metal chelating flocculant still has the disadvantages of slow reaction rate, unsatisfactory effect, large dosage and high cost.

Method used

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  • Organic polymer heavy metal chelating flocculant as well as preparation method and application thereof
  • Organic polymer heavy metal chelating flocculant as well as preparation method and application thereof
  • Organic polymer heavy metal chelating flocculant as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0036] In this embodiment, an organic polymer heavy metal chelating flocculant is prepared from the following raw materials:

[0037]

[0038] The preparation method of above-mentioned organic polymer heavy metal chelating flocculant comprises the steps:

[0039] Cross-linking reaction: Add 40ml of 1% sodium chloride solution with a mass fraction of 10g to make a paste, put it in a water bath, adjust the pH value to 9 with sodium hydroxide, and at a temperature of 30°C, Slowly add 0.4ml adipic acid and stir for 1h;

[0040] Grafting acrylamide: Add 1ml of 1% cerium ammonium nitrate aqueous solution (containing 0.01g cerium ammonium nitrate), stir evenly, adjust the temperature to 35°C, adjust the pH to 4 with hydrochloric acid, add 0.5g acrylamide, blow in nitrogen, and stir Reaction 2h;

[0041] Sulfonation: adjust the pH value to 9, add 2.3ml of carbon disulfide, and stir for 2 hours at a temperature of 25°C;

[0042] Post-processing: the product is washed with water, ...

Embodiment 2

[0044] In this embodiment, an organic polymer heavy metal chelating flocculant is prepared from the following raw materials:

[0045]

[0046] The preparation method of above-mentioned organic polymer heavy metal chelating flocculant comprises the steps:

[0047] Cross-linking reaction: Add 30ml of 1% sodium chloride solution by mass fraction into 10g of carboxymethyl starch to make a paste, put it in a water bath, adjust the pH value to 10 with sodium hydroxide, and at a temperature of 30°C, Slowly add 1ml of phosphorus oxychloride and stir for 1h;

[0048] Graft acrylamide: Add 1ml of 1% potassium persulfate aqueous solution (containing 0.01g of potassium persulfate), stir well, adjust the temperature to 40°C, adjust the pH to 5 with hydrochloric acid, add 1g of acrylamide, blow in nitrogen, and stir to react 3h;

[0049] Sulfonation: adjust the pH value to 10, add 3.1ml of carbon disulfide, and stir for 2 hours at a temperature of 30°C to obtain the organic polymer hea...

Embodiment 3

[0052] In this embodiment, an organic polymer heavy metal chelating flocculant is prepared from the following raw materials:

[0053]

[0054] The crosslinking agent is adipic acid.

[0055] The preparation method of above-mentioned organic polymer heavy metal chelating flocculant comprises the steps:

[0056] Cross-linking reaction: Add 15ml of 1% sodium chloride solution by mass fraction to 10g of carboxymethyl starch to make a paste, put it in a water bath, adjust the pH value to 12 with sodium hydroxide, and at a temperature of 50°C, Slowly add 2g of sodium trimetaphosphate, and stir for 2 hours;

[0057] Graft acrylamide: Add 1ml of 1% sodium persulfate aqueous solution (containing 0.01g of sodium persulfate), stir evenly, adjust the temperature to 50°C, adjust the pH to 7 with hydrochloric acid, add 2g of acrylamide, blow in nitrogen, and stir for reaction 5h;

[0058] Sulfonation: adjust the pH value to 12, add 4.6ml of carbon disulfide, and stir for 4 hours at a te...

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Abstract

The invention discloses an organic polymer heavy metal chelating flocculant as well as a preparation method and an application thereof. The organic polymer heavy metal chelating flocculant is prepared from the following raw materials in parts by weight: 100 parts of carboxymethyl starch, 5-20 parts of a crosslinking agent, 0.05-0.5 part of an initiator, 5-20 parts of acrylamide and 28-60 parts of carbon disulfide, wherein the crosslinking agent is adipic acid, phosphorus oxychloride or sodium trimetaphosphate. The organic polymer heavy metal chelating flocculant has the efficacies of both excellent heavy metal chelating precipitation and flocculation, has the advantages of rapidness in reaction speed, ideal effect of removing heavy metal ions, high treatment efficiency and the like, is low in dosage and cost and is capable of economically and efficiently treating sewage containing the heavy metal ions.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to an organic polymer heavy metal chelating flocculant and a preparation method and application thereof. Background technique [0002] Industrial wastewater often contains copper, nickel, lead and other heavy metal ions or their complex ions. Such heavy metal ions or their complex ions are stable in the natural environment, can accumulate in organisms, and have chronic toxicity. If they cannot be properly handled, they will have a serious impact on agriculture and fisheries, and endanger human health. One of the serious problems facing the environment. [0003] At present, the commonly used heavy metal wastewater treatment method is based on the principle of using physical, chemical and biological reactions to transfer the existing position and physical and chemical form of heavy metal ions. Due to the complex composition of heavy metal wastewater, large concentration differences...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/62
CPCC02F1/56C02F2101/20
Inventor 刘世念胡勇有程建华李欣杨梦帆齐亮吕旺燕
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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