Anaerobic granular sludge loaded vulcanized nano zero-valent iron adsorption material as well as preparation method and application thereof

An anaerobic granular sludge and nano-zero valent iron technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of easy loss, easy aggregation, heavy metal ions and semi-metal ions Pollution and other problems, to achieve the effect of improving adsorption performance, long service life, and overcoming easy loss

Inactive Publication Date: 2021-03-02
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies in the above prior art, the present invention provides an anaerobic granular sludge-loaded vulcanized nanometer zero-valent iron adsorption material, which can be used to adsorb heavy metal ions or semi-metal ions in wastewater to solve the problem of heavy metal ions and semi-metal ions in wastewater. It can also solve the problem of disposal of the remaining anaerobic granular sludge discharged from the anaerobic reactor and the problem of easy loss and agglomeration when sulfide nano-zero-valent iron is used as a single adsorption material

Method used

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  • Anaerobic granular sludge loaded vulcanized nano zero-valent iron adsorption material as well as preparation method and application thereof
  • Anaerobic granular sludge loaded vulcanized nano zero-valent iron adsorption material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0028] Embodiment 1 The preparation of anaerobic granular sludge loaded sulfide nanometer zero-valent iron adsorption material (carried out in the laboratory), the specific steps are as follows:

[0029] ① Pass the anaerobic granular sludge through a sieve below 80 mesh, wash and dry.

[0030] ②Put 0.75g of anaerobic granular sludge in a 500mL three-necked flask, and add 80mL of ethanol-water mixed solution (the volume ratio of ethanol to water is 1:0.25).

[0031] ③Add 15mL ferrous sulfate aqueous solution (concentration is 0.75mol / L), 94mL sodium borohydride aqueous solution (concentration is 0.75mol / L), 25mL sodium dithionite aqueous solution (concentration is 0.75mol / L) into the flask, and feed nitrogen.

[0032] ④Adopt small-scale mechanical stirring with a rotating speed of 200rpm. After stirring and reacting at room temperature for 2 hours, centrifuge at 2000rpm for 5 minutes to remove the supernatant, and then use anaerobic deionized water and oxygen-free ethanol to c...

Embodiment 2

[0034] The preparation of embodiment 2 anaerobic granular sludge loading sulfide nanometer zero-valent iron adsorption material (carried out in the laboratory), concrete steps are as follows:

[0035] ① Pass the anaerobic granular sludge through a sieve below 80 mesh, wash and dry.

[0036] ②Put 0.75g of anaerobic granular sludge in a 500mL three-necked flask, and add 80mL of ethanol-water mixed solution (the volume ratio of ethanol to water is 1:0.25).

[0037] ③Add 15mL ferrous sulfate aqueous solution (concentration is 0.5mol / L), 60mL sodium borohydride aqueous solution (concentration is 0.5mol / L), 15mL sodium dithionite aqueous solution (concentration is 0.5mol / L) into the flask, and feed nitrogen.

[0038] ④Adopt small-scale mechanical stirring with a rotating speed of 200rpm. After stirring and reacting at room temperature for 2 hours, centrifuge at 2000rpm for 5 minutes to remove the supernatant, and then use anaerobic deionized water and oxygen-free ethanol to centrif...

Embodiment 3

[0040] Embodiment 3 The preparation of anaerobic granular sludge loaded sulfide nanometer zero-valent iron adsorption material (carried out in the laboratory), the specific steps are as follows:

[0041] ① Pass the anaerobic granular sludge through a sieve below 80 mesh, wash and dry.

[0042] ②Put 0.75g of anaerobic granular sludge in a 500mL three-necked flask, and add 80mL of ethanol-water mixed solution (the volume ratio of ethanol to water is 1:0.25).

[0043] ③Add 20mL ferrous sulfate aqueous solution (concentration is 1mol / L), 80mL sodium borohydride aqueous solution (concentration is 1mol / L), 15mL sodium dithionite aqueous solution (concentration is 1mol / L) into the flask, and pass nitrogen gas.

[0044] ④Adopt small-scale mechanical stirring with a rotating speed of 200rpm. After stirring and reacting at room temperature for 2 hours, centrifuge at 2000rpm for 5 minutes to remove the supernatant, and then use anaerobic deionized water and oxygen-free ethanol to centrif...

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Abstract

The invention provides an anaerobic granular sludge loaded vulcanized nano zero-valent iron adsorbing material which is obtained by taking anaerobic granular sludge as a base material, ferrous sulfateas an iron source, sodium borohydride as a reducing agent and sodium hydrosulfite as a vulcanizing agent through a composite reaction. The form of the material is that vulcanized nano zero-valent iron is loaded on the surface of anaerobic granular sludge. The adsorption performance of the adsorption material on heavy metal ions or semimetal ions is remarkably improved, and the adsorption materialcan be used for adsorbing the heavy metal ions or semimetal ions in wastewater, so that the pollution problem of the heavy metal ions and semimetal ions in the wastewater is solved, and the problemsof disposal of residual anaerobic granular sludge discharged from an anaerobic reactor and easy loss and easy agglomeration of vulcanized nano zero-valent iron as a single adsorption material can be solved at the same time.

Description

technical field [0001] The invention belongs to the technical field of waste resource utilization and water treatment, and in particular relates to an anaerobic granular sludge-loaded vulcanized nanometer zero-valent iron adsorption material and a preparation method and application thereof. Background technique [0002] A large amount of high-concentration organic wastewater in my country is mainly treated with anaerobic sludge. After the anaerobic granular sludge reaches the sludge age, it will be discharged as excess sludge, resulting in a large amount of excess sludge. At present, the annual output has exceeded 40 million tons (calculated with a moisture content of 80%), and the sludge disposal technology has not kept up with it, resulting in about 80% of the remaining sludge in my country not being safely disposed of. The harmless disposal rate of sludge in my country is less than 40%, and the effective treatment and resource utilization rate of sludge is only 25%. Impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/70C02F1/72C02F101/20
CPCB01J20/02B01J20/0229B01J20/0285B01J20/24C02F1/288C02F1/70C02F1/705C02F1/72C02F2101/20C02F2305/023
Inventor 王志伟付文才王双飞覃程荣张健周敬红党文豪朱凯莉
Owner GUANGXI UNIV
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