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Preparation for removing characteristic pollutants in wastewater in electronic industry as well as preparation method and application thereof

A characteristic pollutant, technology in the electronics industry, used in water pollutants, water/sewage treatment, metallurgical wastewater treatment, etc.

Pending Publication Date: 2020-10-23
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, there is no method for treating wastewater by using nano-zero-valent iron-loaded materials combined with microorganisms and flocculation-sedimentation processes

Method used

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  • Preparation for removing characteristic pollutants in wastewater in electronic industry as well as preparation method and application thereof
  • Preparation for removing characteristic pollutants in wastewater in electronic industry as well as preparation method and application thereof
  • Preparation for removing characteristic pollutants in wastewater in electronic industry as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 Preparation of organically modified montmorillonite loaded nanometer zero-valent iron

[0054] 1. Preparation of Organically Modified Montmorillonite

[0055] The preparation method of organically modified montmorillonite is carried out as follows:

[0056] 1) Weigh 0.2g of cetyltrimethylammonium bromide (CTMB) and dissolve it in 200mL of deionized water and heat it to 60°C in a water bath, then add 5g of sodium ion montmorillonite (Na-MMT, the cation exchange capacity is about 1mmol / g), stirring continuously at 60°C for 30min.

[0057] 2) The suspension was centrifuged, and the precipitate was washed three times with deionized water, and then dried in an oven at 70° C. for 14 hours.

[0058] 3) Take out the dried precipitate, pass it through a 100-mesh sieve after grinding, and activate it at 115° C. for 2 hours to obtain organic montmorillonite (OMt).

[0059] 2. Preparation of organically modified montmorillonite-loaded nano-zero-valent iron materials (...

Embodiment 2

[0064] Example 2 Degradation test of organically modified montmorillonite loaded with nanometer zero-valent iron and microorganisms to remove characteristic pollutants

[0065] In order to simulate the actual situation and explore the combination of organically modified montmorillonite loaded with nanometer zero-valent iron and microorganisms to remove characteristic pollutants, batch experiments were designed. The selected characteristic organic pollutants are TBBPA and nonylphenol, and the selected heavy metals are hexavalent chromium and divalent cadmium.

[0066] 1. Enrichment and domestication of flora

[0067] The biochemical pool activated sludge taken in the urban sewage treatment plant is carried out in the laboratory to domesticate the flora, take out 100mL of activated sludge mud-water mixture in a 500mL Erlenmeyer flask, add 400mL of liquid medium (see the specific composition of liquid medium) Table 1), seal with a gas-permeable sealing film, and cultivate under ...

Embodiment 3

[0074] Example 3 Effect of organically modified montmorillonite loaded with nanometer zero-valent iron on the removal of characteristic organic pollutants in wastewater from the electronics industry

[0075] Using the organically modified montmorillonite in Example 1 to load nanometer zero-valent iron, to 500m 3 / d electronics industry wastewater treatment. In the first stage, organically modified montmorillonite loaded with nanometer zero-valent iron is added to the biochemical pool to degrade the characteristic pollutants in wastewater synergistically with microorganisms in the activated sludge; in the second stage, organic modification is added to the secondary reaction pool The montmorillonite is loaded with nanometer zero-valent iron to strengthen the flocculation and sedimentation of suspended matter.

[0076] The specific process parameters are as follows: the dosage of organically modified montmorillonite loaded nanometer zero-valent iron in the biochemical pool is 90...

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Abstract

The invention relates to a preparation for removing characteristic pollutants in wastewater in the electronic industry as well as a preparation method and application of the preparation, and belongs to the field of wastewater treatment. In order to efficiently remove the characteristic pollutants in the wastewater, a loaded nano zero-valent iron material is creatively added into a biochemical pooland a secondary reaction pool in the wastewater treatment process to realize the series connection of the functions of the two pools. In the application of the preparation disclosed by the inventionin a wastewater treatment method, the loaded nano zero-valent iron material is combined with microorganisms in the biochemical pool, so that the effect of degrading characteristic pollutants by the microorganisms is enhanced, the flocculation and sedimentation effects are enhanced in the secondary reaction pool, and the effective reaction time of flocculation and sedimentation is shortened to 2-3hours. The preparation and the wastewater treatment method are especially suitable for wastewater treatment in the electronic industry, the removal rate of tetrabromobisphenol A in the wastewater canreach 97%, the removal rate of bisphenol A can reach 95%, the removal rate of nonylphenol can reach 84%, the preparation and the wastewater treatment method also have a good removal effect on heavy metals, and meanwhile, the acute toxicity level of the wastewater is remarkably reduced.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a preparation for removing characteristic pollutants in waste water in the electronics industry, a preparation method thereof, and an application thereof in a waste water treatment method. Background technique [0002] China is the world's largest consumer of electronic products, and it is also a major manufacturer of electronic products in the world. Since entering the 21st century, my country has made a series of major technological breakthroughs in the fields of communications, high-performance computers, and digital television. The industrial scale, industrial structure, and technical level of the electronics and communication equipment manufacturing industry have been greatly improved, and China has become the largest manufacturing base in the world. . In industrial production such as the production of electronic products, a wide variety of organic substances...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F9/14C02F1/52C02F3/34C02F1/28C02F1/70C02F1/72
CPCB01J20/12B01J20/28057B01J20/3085C02F9/00C02F1/705C02F1/5236C02F3/34C02F1/722C02F1/281C02F2101/20C02F2101/22C02F2101/36C02F2101/345C02F2101/322C02F2103/346C02F2103/16
Inventor 彭星星何宇哲李天渝贾晓珊
Owner SUN YAT SEN UNIV
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