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Method using activated montmorillonite biological charcoal composite material to remove estrogens in water

A composite material and biochar technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as incomplete removal, achieve low cost, realize industrial production, and simple operation

Inactive Publication Date: 2018-11-13
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test results of many water bodies at home and abroad show that estrogens represented by estradiol and ethinyl estradiol are ubiquitous in urban water bodies and their concentrations are mostly higher than the interference threshold, and most of these are due to the insufficient treatment of these substances by sewage treatment plants. remove completely
This creates a potential risk for fish and other aquatic organisms in river waters at low concentrations

Method used

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  • Method using activated montmorillonite biological charcoal composite material to remove estrogens in water
  • Method using activated montmorillonite biological charcoal composite material to remove estrogens in water
  • Method using activated montmorillonite biological charcoal composite material to remove estrogens in water

Examples

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Embodiment 1

[0026] A method of activating montmorillonite biochar composite material of the present invention to remove estrogen in water, comprising the following steps:

[0027] (1) Preparation of activated montmorillonite biochar composites

[0028] (1.1) the montmorillonite ( figure 1 ) and biochar at a ratio of 1:1, dissolved in 70mL of ultrapure water, placed in a 100mL reactor, heated in a 180°C oven for 16h, and then cooled.

[0029] (1.2) Thoroughly wash the mixture of montmorillonite and biochar obtained in step (1.1) three times with deionized water, soak and wash with methanol three times, filter, and dry in an oven at 80°C for 24 hours.

[0030] (1.3) Add KOH to the dried montmorillonite biochar composite material in step (1.2), the mass fraction ratio of KOH and montmorillonite biochar composite material is 1%, activate, the activation time is 4h, and finally 80 °C drying and grinding to obtain the activated montmorillonite biochar composite material, such as figure 2 sh...

Embodiment 2

[0036] A kind of activated montmorillonite biochar composite material of the present invention removes the method for estrogen in the water body, its step is identical with the adsorption removal of estrogen in the water body of embodiment 1, difference is only: in embodiment 2, adsorption reaction time is 0- 24h.

[0037] Get 100mL diluted estrogen solution with a concentration of 6mg / L, add 5mg of the activated montmorillonite biochar composite material prepared in Example 1, place in a constant temperature oscillation at 25°C, the water bath constant temperature oscillator speed is 170rpm, and the oscillation time is 0-24h, after the reaction, the solution settles, and is filtered with 0.45 μm polytetrafluoroethylene (syringe type). Measure the concentration of estrogen in the solution after the reaction with an ultraviolet fluorescence photometer, and the calculated adsorption amount results are shown in image 3 . The results show that the activated montmorillonite bioc...

Embodiment 3

[0039] A kind of activated montmorillonite biochar composite material of the present invention removes the method for estrogen in water body, its step is the same as the adsorption and removal of estrogen in embodiment 1 water body, difference is only: in embodiment 3, adsorption initial concentration is 0.2- 8.0mg / L.

[0040] Get 100mL diluted estrogen solution with concentrations of 0.2, 0.4, 0.6, 0.8, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0 and 8.0 mg / L, add 5 mg of the activated montmorillonite bio The carbon composite material was placed in a constant temperature oscillation at 25°C. The rotation speed of the water bath constant temperature oscillator was 170rpm, and the oscillation time was 24h. After the reaction, the solution settled and was filtered with 0.45μm polytetrafluoroethylene (syringe type). Measure the concentration of estrogen in the solution after the reaction with an ultraviolet fluorescence photometer, and the calculated adsorption amount results are shown in ...

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Abstract

The invention relates to application of montmorillonite composite material in the field of water treatment and discloses a method using an activated montmorillonite biological charcoal composite material to remove estrogens in water. The method includes: preparing the composite material, to be more specific, mixing montmorillonite and rice husk biomass, performing hydrothermal carbonization, and subjecting the obtained montmorillonite biological charcoal composite material to KOH activation; adding the activated montmorillonite biological charcoal composite material into an estrogen solution,and oscillating so as to adsorb and remove the estrogens. The method has the advantages that the activated montmorillonite biological charcoal composite material is used as the absorbent to efficiently remove the estrogens in water, the harm of the estrogens to the aquatic environment is lowered, and the activated montmorillonite biological charcoal composite material is recyclable.

Description

technical field [0001] The invention relates to the application of montmorillonite composite materials in the field of water treatment, and relates to an application of using activated montmorillonite biochar composite materials to remove estrogen in water bodies. Background technique [0002] Endocrine disruptors are widely present in water bodies, even drinking water. Endocrine disruptors can interfere with the regulation of the maintenance of internal environment and developmental processes in humans and wild species. At the same time, estrogen is considered to have strong endocrine disrupting and biological activity, and can cause human or animal reproductive disorders, abnormal behavior and larval variation at very low concentrations. The test results of many water bodies at home and abroad show that estrogens represented by estradiol and ethinyl estradiol are ubiquitous in urban water bodies and their concentrations are mostly higher than the interference threshold, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/34
CPCB01J20/12B01J20/20B01J20/3078C02F1/283C02F2101/34
Inventor 田思溶刘云国江卢华曾光明刘少博黄熙贤李江尹志红
Owner HUNAN UNIV
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