Novel magnetic nano magnetic seed and the method and application thereof in treating industrial biochemical tail water

A magnetic nanometer and industrial wastewater technology, which is applied in the fields of magnetic field/electric field water/sewage treatment, inorganic material magnetism, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of TOC and EfOM protein exceeding the standard, and achieve the increase of specific surface area, The effect of increasing the removal effect and improving the adsorption effect

Active Publication Date: 2016-01-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at problems such as TOC and EfOM (including protein, humic acid, polysaccharide) exceeding the standard after the existing coagulation magnetic separation technology treats wastewater, the present invention provides a new type of magnetic nano-magnetic seed and its method and method for treating industrial biochemical tail water. application

Method used

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  • Novel magnetic nano magnetic seed and the method and application thereof in treating industrial biochemical tail water
  • Novel magnetic nano magnetic seed and the method and application thereof in treating industrial biochemical tail water
  • Novel magnetic nano magnetic seed and the method and application thereof in treating industrial biochemical tail water

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) 1.3gFeCl 3 ·6H 2 O was dissolved in 40mL of ethylene glycol, ultrasonically dissolved, 3.5g of anhydrous sodium acetate was added, stirred and mixed, 40mL of the dissolved sample was transferred to a 50mL polytetrafluoroethylene reactor, and reacted at 200°C for 12h to prepare Uniform spherical superparamagnetic Fe with a particle size of about 500 nm 3 o 4 nanoparticles;

[0034] (2) At room temperature (25°C), take 2.5g of cetyltrimethylammonium bromide and 200mL of deionized water, stir to dissolve, and add 1g of Fe prepared in step (1) 3 o 4 Nanoparticles, add 300mL deionized water and mechanically stir for 10min, under the protection of nitrogen, add dropwise 60mgNaOH solution, in which the concentration of NaOH is 1mol / L, the dropping rate is 1 drop / min, mechanically stir for 20min; add 3mL of anhydrous Ethanol and 3mL tetraethyl orthosilicate, heated in a water bath to 55°C for 2 hours at a constant temperature;

[0035] (3) Add 3mL of 3-aminopropyltrie...

Embodiment 2

[0042] (1) Add 1.5gFe 2 (SO 4 ) 3 Dissolve in 40mL ethylene glycol, ultrasonically dissolve, add 3.8g sodium citrate, stir and mix, transfer 40mL dissolved sample to a 50mL polytetrafluoroethylene reactor, react at 200°C for 12h, and prepare the particle size Uniform spherical superparamagnetic Fe of about 500 nm 3 o 4 nanoparticles;

[0043] (2) At room temperature (25°C), take 2.5g of cetyltrimethylammonium bromide and 200mL of deionized water, stir to dissolve, and add 1g of Fe prepared in the above steps 3 o 4 Nanoparticles, add 300mL deionized water and mechanically stir for 10min, under the protection of nitrogen, add 60mgNH 3 ·H 2 O solution, where NH 3 ·H 2 The concentration of O is 1mol / L, the rate of addition is 1 drop / min, and mechanically stirred for 20 minutes; add 3mL of absolute ethanol and 3mL of tetraethyl orthosilicate at room temperature, and heat it in a water bath to 55°C for 2 hours at a constant temperature;

[0044] (3) Add 3mL of 3-aminopropy...

Embodiment 3

[0051] (1) 1.3gFeCl 3 ·6H 2O was dissolved in 40mL of ethylene glycol, ultrasonically dissolved, 3.5g of anhydrous sodium acetate was added, stirred and mixed, 40mL of the dissolved sample was transferred to a 50mL polytetrafluoroethylene reactor, and reacted at 200°C for 12h to prepare Uniform spherical superparamagnetic Fe with a particle size of about 500 nm 3 o 4 nanoparticles;

[0052] (2) At room temperature (25°C), take 2.5g of cetyltrimethylammonium bromide and 200mL of deionized water, stir to dissolve, and add 1g of Fe prepared in the above steps 3 o 4 Nanoparticles, add 300mL deionized water and mechanically stir for 10min, under the protection of nitrogen, add dropwise 60mgNaOH solution, wherein the concentration of NaOH is 1mol / L, the dropping rate is 1 drop / min, mechanically stir for 20min; add 3mL of anhydrous Ethanol and 3mL tetraethyl orthosilicate, then heated in a water bath to 55°C for 2 hours at a constant temperature;

[0053] (3) Add 3mL of 3-amino...

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Abstract

The invention discloses a novel magnetic nano magnetic seed and the method and application thereof in treating industrial biochemical tail water, and belongs to the field of industrial wastewater advanced treatment. The invention utilizes a hydrothermal method to prepare Fe3O4 nano particles with superparamagnetism; and the Fe3O4 nano particles are covered by SiO2 and grafted with -NH2 groups to prepare Fe3O4@SiO2-NH2 as a magnetic seed. The magnetic seed, a coagulant and a coagulant aid are added to the secondary industrial wastewater, stirred and mixed; the coagulated wastewater is placed in a magnetic field; and under the action of magnetic field force, the flocculation with magnetic seeds is quickly separated from the wastewater being treated. The method has the advantages of convenient operation and simple device, can effectively reduce the organic substances in secondary industrial wastewater; compared to a traditional chemical coagulation method, the method has greatly reduced settlement time; compared with the existing coagulation and magnetic separation method, the method has higher removal efficiency, and greatly reduced amount of sediment; therefore, the invention has relatively broad application prospects in depth processing of industrial wastewater.

Description

technical field [0001] The invention belongs to the field of advanced treatment of industrial wastewater, in particular, it relates to a method for advanced treatment of wastewater using coagulation magnetic separation technology; more specifically, it relates to a new type of magnetic nano-magnetic species and its method and application for treating industrial biochemical tail water . Background technique [0002] Although many industrial wastewaters have been pretreated and biochemically treated, certain pollutants such as TOC, COD, TP, EfOM (including protein, humic acid, polysaccharides) are still high, and it is difficult to meet the discharge standards. Therefore, further deal with. There are many types of pollutants in industrial wastewater. For pollutants with strong magnetic properties, magnetic separation technology can be directly used to separate them; for pollutants with weak magnetic properties, magnetic species such as iron powder, magnetite, and hematite can...

Claims

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Application Information

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IPC IPC(8): C01G49/08H01F1/11C02F1/48C02F1/52C02F1/56
Inventor 任洪强储旭丁丽丽陶奕成
Owner NANJING UNIV
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