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Composite flocculant preparation and heavy metal organic matter-containing tailings wastewater treatment method

A composite flocculant and treatment method technology, applied in the direction of flocculation/sedimentation water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of ineffective treatment of composite wastewater in mining areas and heavy metal ion chelation ability Low, persistent hazards to the ecological environment and other issues, to achieve the effect of improving comprehensive treatment performance, small secondary pollution, and short flocculation time

Inactive Publication Date: 2017-03-29
SHANGLUO UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pollutants infiltrate into the ground or flow into nearby rivers, polluting groundwater and water sources. The heavy metals infiltrating into the environment are easy to accumulate and difficult to degrade, which are persistent hazards to the ecological environment and human health.
[0003] Generally speaking, conventional polymer flocculants can remove most of the organic matter and metal insoluble matter in the process of flocculation and sedimentation, but cannot effectively remove dissolved heavy metals, have low chelating ability for heavy metal ions, and cannot effectively treat composite wastewater in mining areas.

Method used

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  • Composite flocculant preparation and heavy metal organic matter-containing tailings wastewater treatment method
  • Composite flocculant preparation and heavy metal organic matter-containing tailings wastewater treatment method
  • Composite flocculant preparation and heavy metal organic matter-containing tailings wastewater treatment method

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Experimental program
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Effect test

Embodiment 1

[0043] The present embodiment provides a kind of preparation method of composite flocculant, and this method comprises the following steps:

[0044] Step 1, add the nitrate solution solution of mixed metal ions with a total concentration of 0.5mol / L into 2mol / L preheated sodium hydroxide solution to make a precipitant, slowly add the mixed metal ion solution under stirring, and use the mass concentration Adjust the pH value to 10.5 for 10% ammonia water, let stand, wash repeatedly with distilled water, filter with suction, and dry to constant weight in a vacuum oven at 90-110°C to obtain magnesium copper zinc ferrite (Mg 0.25 Cu 0.25 Zn 0.5 Fe 2 o 4 , referred to as Ferrite).

[0045] The nitrate solution of the mixed metal ions is a mixed nitrate solution of magnesium ions, copper ions, zinc ions and iron ions; the magnesium ions, copper ions, zinc ions and iron ions in the nitrate solution of the mixed metal ions The molar ratio between them is 1:1:1:1;

[0046] The to...

Embodiment 2

[0064] The present embodiment provides a kind of preparation method of composite flocculant, and this method comprises the following steps:

[0065] Step 1 is the same as Step 1 of Embodiment 1.

[0066] Step 2 is the same as Step 2 of Embodiment 1.

[0067] Step 3, step 3, using polyethyleneimine (PEI) as the matrix, under the condition of the polypeptide reagent (EDC·HCL) as the initiator, adding excess thioglycolic acid, carrying out amidation reaction, adjusting pH=2.0 with hydrochloric acid, Stir the reaction at 40°C for 12 hours to obtain mercaptoacetylethyleneimine.

[0068] The polypeptide reagent is 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC·HCl).

[0069] The molar ratio between polyethyleneimine, thioglycolic acid and peptide reagent is 1:2:0.2.

[0070] Step 4 is basically the same as Step 4 in Embodiment 1.

[0071] The characterization results of the composite flocculant Ferrite-CMC-MAPEI prepared in this example are the same as those in ...

Embodiment 3

[0073] The present embodiment provides a kind of preparation method of composite flocculant, and this method comprises the following steps:

[0074] Step 1 is the same as Step 1 of Embodiment 1.

[0075] Step 2 is the same as Step 2 of Embodiment 1.

[0076] Step 3, step 3, using polyethyleneimine (PEI) as the matrix, under the condition of the polypeptide reagent (EDC·HCL) as the initiator, adding excess thioglycolic acid, carrying out amidation reaction, adjusting pH=1.0 with hydrochloric acid, Stir the reaction at 30°C for 12 hours to obtain mercaptoacetylethyleneimine.

[0077] The polypeptide reagent is 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC·HCl).

[0078] The molar ratio between polyethyleneimine, thioglycolic acid and peptide reagent is 1:1:0.1.

[0079] Step 4 is basically the same as Step 4 in Embodiment 1.

[0080] The characterization results of the composite flocculant Ferrite-CMC-MAPEI prepared in this example are the same as those in ...

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Abstract

The invention provides composite flocculant preparation and a heavy metal organic matter-containing tailings wastewater treatment method. The composite flocculant preparation comprises: mixing a magnesium-copper-zinc ferrite and distilled water, carrying out ultrasonic dispersing, adding an excess sodium carboxymethyl cellulose aqueous solution in a dropwise manner, carrying out a stirring reaction to generate magnesium-copper-zinc ferrite-carboxymethyl cellulose, adding excess thioglycolic acid, carrying out an amidation reaction by using polyethylene imine as a precursor and using a polypeptide reagent as an initiator to prepare mercaptoacetyl polyethylene imine, adding the excess mercaptoacetyl polyethylene imine aqueous solution to the magnesium-copper-zinc ferrite-carboxymethyl cellulose, uniformly stirring, adding an excess glutaraldehyde aqueous solution in a dropwise manner, carrying out a stirring reaction, washing, and drying to obtain the composite flocculant. According to the present invention, the net capturing sweeping effect and the chelating effect of the sulfur terminal having the heavy metal affinity and the amphoteric groups such as carbonyl and amino in the thiol group of the novel polymer composite flocculant are used, such that the low concentration heavy metal and the organic pollution in composite wastewater are effectively treated, and the performance is stable.

Description

technical field [0001] The invention belongs to the technical field of water treatment and relates to tailings wastewater containing heavy metal organic matter, in particular to the preparation of a composite flocculant and a treatment method for tailings waste water containing heavy metal organic matter. Background technique [0002] Tailings wastewater has a large amount of discharge and complex components. It not only contains dissolved metal salts, ore slime, and residual beneficiation agents, but also contains various low-concentration heavy metal ions such as copper, lead, and chromium. These pollutants infiltrate into the ground or flow into nearby rivers, polluting groundwater and water sources. The heavy metals infiltrating into the environment are easy to accumulate and difficult to degrade, causing persistent harm to the ecological environment and endangering human health. [0003] Generally speaking, conventional polymer flocculants can remove most of the organic...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F101/30
CPCC02F1/5236C02F1/5263C02F1/56C02F2101/30
Inventor 江元汝刘子娟徐婷孙强强甘俊羊郭卫华陈利君
Owner SHANGLUO UNIV
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