Preparation method of bio-based composite adsorption material for sewage treatment

A composite adsorption material and sewage treatment technology, applied in the direction of adsorption of water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problem of excessive heavy metals in sludge, achieve improved hydrophobicity and good removal effect Effect

Inactive Publication Date: 2019-02-19
ANHUI SHILI ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Sewage treatment plants produce a large amount of sludge every day. The content of organic matter, nitrogen and phosphorus in it is much higher than the corresponding component content in the soil in Northwest China. It has excellent prospects for the application of agricultural fertilizers. At present, the biggest limiting factor is sludge The problem of excessive medium and heavy metals

Method used

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  • Preparation method of bio-based composite adsorption material for sewage treatment

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Embodiment 1

[0030] A method for preparing a bio-based composite adsorption material for sewage treatment, characterized in that it comprises the following steps:

[0031] (1) Organic modification of attapulgite:

[0032] Add hexadecyltrimethylammonium bromide to 5 parts of attapulgite according to the mass ratio of 1:20 and mix, then add 90 parts of absolute ethanol, ultrasonically vibrate for 1 hour, centrifuge and wash until there is no bromide ion, put in 100- Dry in an oven at 110°C, grind through a 200-mesh sieve, and obtain organically modified attapulgite;

[0033] (2) Preparation of calcium alginate cross-linked attapulgite-zeolite microspheres:

[0034] Add sodium alginate solution at a ratio of 1:10 to 15 parts of pretreated zeolite powder, then add organically modified attapulgite obtained in (1), mix and stir in a water bath stirrer at 35-45°C for 1 hour, and add calcium chloride solution dropwise , after continuing to stir for 8 hours, take it out to obtain calcium alginate...

Embodiment 2

[0046] A method for preparing a bio-based composite adsorption material for sewage treatment, characterized in that it comprises the following steps:

[0047] (1) Organic modification of attapulgite:

[0048]Add cetyltrimethylammonium bromide to 10 parts of attapulgite at a mass ratio of 1:20 and mix, then add 100 parts of absolute ethanol, ultrasonically vibrate for 2 hours, centrifuge and wash until there is no bromide ion, put in 100- Dry in an oven at 110°C, grind through a 200-mesh sieve, and obtain organically modified attapulgite;

[0049] (2) Preparation of calcium alginate cross-linked attapulgite-zeolite microspheres:

[0050] Add sodium alginate solution at a ratio of 1:10 to 20 parts of pretreated zeolite powder, then add organically modified attapulgite obtained in (1), mix and stir in a water bath stirrer at 35-45°C for 2 hours, and add calcium chloride solution dropwise , after continuing to stir for 10 hours, take it out to obtain calcium alginate cross-linke...

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Abstract

The invention discloses a preparation method of a bio-based composite adsorption material for sewage treatment. According to the method, deionized water, 1-(3-dimethylaminopropyl)-3-ethyldimethylaminopropylcarbodiimide and N-hydroxysuccinimide are added into citric acid modified beta-cyclodextrin, the mixture is stirred and activated and then added into a chitosan solution, then calcium alginate crosslinked attapulgite-zolite microspheres and modified activated carbon are added, the mixture is quickly stirred and poured into a mold, standing is performed overnight, soaking is performed repeatedly with deionized water after gelation, freezing is performed at low temperature, and then freeze-drying is performed to obtain the bio-based composite adsorption material. The attapulgite is organically modified, wherein organic modification is performed by using a surfactant cetyl trimethyl ammonium bromide, the surfactant used for the organic modification is grafted onto the surface of the attapulgite to improve the hydrophobicity of the attapulgite; the organically modified attapulgite has a good effect on removing heavy metal ions in sewage.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a preparation method of a bio-based composite adsorption material for sewage treatment. Background technique [0002] With the continuous development of modern industries and the continuous improvement of people's living standards, the problem of water pollution has become increasingly serious. The study of pollutants in sewage found that, unlike organic pollutants, heavy metal ion pollution is not biodegradable and can be deposited in organisms. It is necessary to develop new technologies that can effectively remove heavy metal ions in sewage and to explore their removal mechanism. Sewage treatment plants produce a large amount of sludge every day. The content of organic matter, nitrogen and phosphorus in it is much higher than the corresponding component content in the soil in Northwest China. It has excellent prospects for the application of agricultural fertilizer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20C02F101/38
CPCB01J20/24B01J20/12B01J20/16B01J20/20B01J20/22C02F1/28C02F2101/20C02F2101/38C02F2101/40
Inventor 刘佳兵
Owner ANHUI SHILI ENVIRONMENTAL PROTECTION TECH CO LTD
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