Preparation and application of manganese dioxide modified charcoal for removing 17beta-estradiol in water

A technology of manganese dioxide and biochar, applied to water pollutants, other chemical processes, water/sewage treatment, etc., to achieve the effects of fast production speed, simple and feasible preparation method, and wide sources

Inactive Publication Date: 2017-01-18
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to develop a low-cost, high-efficiency manganese dioxide-modified biochar material that can be used to adsorb and treat 17β-estradiol pollutants for water bodies polluted by 17β-estradiol

Method used

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  • Preparation and application of manganese dioxide modified charcoal for removing 17beta-estradiol in water
  • Preparation and application of manganese dioxide modified charcoal for removing 17beta-estradiol in water
  • Preparation and application of manganese dioxide modified charcoal for removing 17beta-estradiol in water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A biochar raw material of the manganese dioxide modified biochar of the present invention is selected from agricultural by-product straw, and the specific preparation method is as follows:

[0024] The collected raw materials were washed with deionized water and dried at 70° C. for 24 hours. The dried material is crushed to a particle size of less than 0.147mm, and passed through a 100-mesh sieve. Afterwards, the raw materials were put into a tube-type atmosphere furnace for pyrolysis and firing. During the pyrolysis process, the quartz tube of the atmosphere furnace was kept sealed, and nitrogen was introduced into the tube at a flow rate of 50 mL / min to maintain the stability of the entire pyrolysis process. anaerobic conditions. At room temperature, the temperature was increased to 580°C at a heating rate of 10°C / min, and the pyrolysis was continued for 4 hours at this temperature. Isolate the air, cool down naturally, and finally get biochar. Then the biochar was...

Embodiment 2

[0028] The manganese dioxide modified biochar material of the present invention treats 17β-estradiol in water, comprising the following steps:

[0029] Take 100 mL of 0.4-6 mg / L 17β-estradiol solution in conical flasks, respectively add 5 mg of biochar and manganese dioxide modified biochar materials into each conical flask, place them in a constant temperature shaker in a water bath, and React at 25°C. After 24 hours, 10 mL of the solution was taken from each Erlenmeyer flask for centrifugation, and after centrifugation, it was filtered through a 0.45 μm filter membrane, and the filtrate was taken into a centrifuge tube. Fluorescence photometer was used to detect the solution concentration after reaction. The results are shown in Table 1:

[0030] Table 1: Adsorption data under different initial concentrations of 17β-estradiol

[0031]

[0032] It can be seen from Table 1 that under different initial concentrations of 17β-estradiol, the adsorption capacity of manganese ...

Embodiment 3

[0034] The manganese dioxide modified biochar material of the present invention treats salt 17β-estradiol in water, comprising the following steps:

[0035] Add 5 mg of manganese dioxide modified biochar to 100 mL of 2 mg / L 17β-estradiol solution, place it in a constant temperature shaker in a water bath, and react at 25° C. At different time intervals, 10 mL of the solution was taken for centrifugation, filtered through a 0.45 μm filter membrane after centrifugation, and the filtrate was taken into a centrifuge tube. Fluorescence spectrophotometer was used to detect the concentration of the solution after reaction. The results of the adsorption capacity at different times are attached figure 2 shown.

[0036] Depend on figure 2 It can be seen that the adsorption amount of manganese dioxide modified biochar to 17β-estradiol in water increases continuously with the increase of time. Between 15min and 120min, the adsorption capacity increased rapidly, and began to reach sa...

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Abstract

The invention relates to preparation and application of manganese dioxide modified charcoal for removing 17beta-estradiol in water. The charcoal is mainly prepared from forestry and agricultural residues, and the preparation raw material is wide in source and low in price. The charcoal is prepared through the specific steps that biomass dried and ground into powder is subjected to high temperature calcination; after charcoal is prepared, the surface of the charcoal is loaded with manganese dioxide nano particles through an improved Murray synthesis method. The manganese dioxide modified charcoal prepared through the method has high removal capacity to 17beta-estradiol in the water. The manganese dioxide modified charcoal is easy to prepare and low in price, and is a cheap and efficient adsorbent. The adsorption capacity of the charcoal is remarkably improved through modification of manganese dioxide, and high application potential is achieved.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and water treatment new technologies, and in particular relates to a preparation method and application of manganese dioxide modified biochar for removing 17β-estradiol in water. Background technique [0002] In recent years, there has been an increasing number of studies on exogenous chemical substances that interfere with the endocrine system of humans and animals, and affect health and reproduction. Environmental Estrogens (Environmental Estrogens) are a class of exogenous chemical substances that enter the environment. After they enter the organism, they can simulate or block natural hormones, stimulate or inhibit the biological effects of hormones, and interfere with hormone synthesis, transport, and clearance. process, altering the normal regulatory functions of the nervous, immune and endocrine systems, thereby causing hazards to wildlife and human health. Among all enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/34
CPCB01J20/20B01J20/06C02F1/283C02F2101/34
Inventor 江卢华刘云国曾光明刘少博刘妮曾志伟王晓华宁启蒙尹志红
Owner HUNAN UNIV
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