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A kind of recovery method and its product and application of waste after organic waste water treatment by ldh

A technology of organic waste water and recovery method, applied in the fields of botany equipment and methods, water pollutants, chemical instruments and methods, etc., can solve the problem of inability to achieve complete regeneration of adsorbents, low added value of adsorbents, secondary pollution of adsorbents, etc. problem, to achieve better effect, high degree of reuse, and lower emissions.

Active Publication Date: 2022-04-12
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above process will produce a large amount of CO 2 Greenhouse gases need to be collected and processed, causing secondary pollution again
In addition, the high-temperature calcination method cannot realize the complete regeneration of the adsorbent, and the added value of the regenerated adsorbent is low, and the regeneration effect gradually decreases as the adsorption continues, and there is still the problem of secondary pollution of the discarded adsorbent

Method used

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  • A kind of recovery method and its product and application of waste after organic waste water treatment by ldh
  • A kind of recovery method and its product and application of waste after organic waste water treatment by ldh
  • A kind of recovery method and its product and application of waste after organic waste water treatment by ldh

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Experimental program
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Effect test

Embodiment 1

[0031] (1) In the printing and dyeing wastewater treatment project, magnesium aluminum hydrotalcite is added to the reaction tank to absorb its organic pollutants, and the precipitate after the adsorption is separated from solid to liquid, and then dried by centrifugal dehydration, heating and drying, etc. Part of the solid O-LDH waste can be taken for X-ray diffraction (XRD) to obtain figure 1 Diffraction pattern of the obtained material composition, phase structure, morphology and other information, it can be clearly seen that the organic pollutant SDS has successfully intercalated into the LDH laminates;

[0032] (2) Import the dried O-LDH into a high-temperature-resistant porcelain container, and carry out cracking in a tube furnace at a constant temperature of 500°C. The tube furnace program is set as follows: the initial temperature of the first stage is 20°C, and after Rise from 20°C to 200°C in 20 minutes; in the second stage, increase the temperature from 200°C to 500...

Embodiment 2

[0035] (1) In the tannery wastewater treatment project, magnesium aluminum hydrotalcite is added to the reaction tank to absorb its organic pollutants, and the precipitate after the adsorption is separated from solid to liquid, and then dehydrated by centrifugal dehydration, heating and drying to obtain Dried solid O-LDH waste;

[0036] (2) Import the completely dried O-LDH into a high-temperature-resistant porcelain container, and crack in a tube furnace at a constant temperature of 700°C. The program is set as: T 1起始 = 30°C, after 25min from 30°C to 250°C, in the second stage at a rate of 10°C / min from 250°C to 700°C for 240min, then with V 降 =15°C / min from 700°C to 340°C, and finally cooled to room temperature naturally.

[0037] Carry out X-ray diffraction (XRD) and scanning electron microscope (SEM) analysis to the product through step (2), draw its such as Figure 4 The XRD patterns shown and as Figure 5 From the SEM spectrum shown, it can be known that O-LDH will be...

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Abstract

The invention discloses a method for recovering waste after LDH treats organic waste water and its products and uses, including: (1) putting layered double metal hydroxide LDH into organic waste water containing high-concentration organic matter, and using LDH to absorb For the organic matter in the wastewater, after the adsorption is completed, the adsorbed sediment is taken out through solid-liquid separation, and then the dried solid O-LDH waste is obtained through pretreatment; (2) The solid O-LDH waste is imported into a high-temperature-resistant porcelain container In , the pyrolysis was carried out in a tube furnace under a protective gas environment to obtain the graphene-supported material G-LDO product. The invention cracks the waste after adsorbing organic matter, and converts it into a graphene-loaded material with high added value. The graphene-loaded material is used for adsorption materials, lithium battery electrodes, supercapacitors, photocatalysis, sterilization and antibacterial, etc. In the field, realize waste treatment and reduce CO 2 emission, which achieves the environmental protection and high resource utilization of the adsorption products. The method of the invention is simple and easy to implement, and is environmentally friendly and has no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and reuse, and in particular relates to a method for recovering waste after LDH treatment of organic wastewater, as well as its product and application. Background technique [0002] Layered double hydroxides (Layers double hydroxide, LDH), a type of two-dimensional anionic clay minerals, are composed of positively charged main layers, interlayer anions and water molecules. Due to its large specific surface area, interlayer ion exchangeability, and the "memory effect" of the product double metal oxide (Layered double oxide, LDO) after high temperature calcination, it can restore the structure of LDH in an anion solution. It is widely used in the treatment of environmental pollutants, especially when the treatment of organic pollutants is becoming more and more mature, and the efficient removal of organic pollutants can be achieved by adsorbing organic anions in wastewater to purify wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/20B01J20/30B01J23/04B01J23/02B01J23/755A01N59/16A01N59/06A01P3/00A01P1/00C02F101/30
Inventor 章萍彭港相明雪何涛欧阳思达
Owner NANCHANG UNIV
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