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A treatment method for bpa-containing sewage and ball-milling modified magnetic biochar composite material

A composite material and processing method technology, applied in the field of ball milling modified magnetic biochar composite materials, can solve the problems of large surface crushing degree of ball milling modified material, increase the difficulty and cost of preparing materials, and exist ecological health and safety risks, etc. Conducive to large-scale promotion, improved removal performance, and stable degradation effect

Active Publication Date: 2021-09-17
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the above-mentioned patented technical solution also has the following deficiencies: one is that the above-mentioned patent uses cation exchange resin as the raw material for preparing carbon-based materials, and the cost is higher; the other is that the environmental conditions are limited, and the removal effect of pollutants is affected by pH The impact is obvious. In the process of removing pollutants, the pH value range it adapts to is narrow, and the pH value of wastewater usually needs to be adjusted, and the process is complicated. The difficulty and cost of preparing materials, on the other hand, the doped cobalt element was listed as a 2B carcinogen by the International Agency for Research on Cancer of the World Health Organization in 2017, which has ecological health and safety risks, and is expensive; Low catalytic stability when stored for a long time
[0011] In addition, at present, the modification of porous carbon materials includes acid / alkali modification and chemical oxidation. Because the surface of the ball-milling modified material prepared by the mechanical ball milling method is greatly broken and the production process is complicated, the mechanical ball milling modification is not used. method

Method used

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  • A treatment method for bpa-containing sewage and ball-milling modified magnetic biochar composite material
  • A treatment method for bpa-containing sewage and ball-milling modified magnetic biochar composite material
  • A treatment method for bpa-containing sewage and ball-milling modified magnetic biochar composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The treatment method of BPA-containing sewage provided by the present embodiment comprises the following steps:

[0062] A) Preparation of ball-milled modified magnetic biochar composite Fe as a BPA-containing wastewater remover 3 O 4 @MBC;

[0063] B) Obtain a BPA-containing sewage sample, and use high performance liquid chromatography to determine the concentration of BPA in the sewage sample to be 20 mg / L;

[0064] C) The pH value of the detected sewage solution is 6.62, which is in the range of 3-9, and there is no need to adjust its pH value;

[0065] D) Add PDS to the concentration of 5 mM in the sewage sample, and then take the ball-milled modified magnetic biochar composite Fe in different proportions 3 O 4 @MBC, respectively added BPA-containing sewage samples, and reacted with shaking in the shaker for 3 h. It was found that the removal rate corresponding to different addition concentrations would change. The removal rate increased with Fe 3 O 4 @MBC varie...

Embodiment 2

[0098] see attached Figure 5 , the method for treating BPA-containing sewage and the ball-milling modified magnetic biochar composite material Fe provided by the embodiment of the present invention 3 O 4 @MBC and its preparation method are basically the same as in Example 1, except that:

[0099] A sewage sample with a BPA concentration of 20 mg / L was obtained. The pH value of the sample was 6.62. Fe was added first. 3 O 4 The concentration of @MBC was 0.5 g / L, and a certain amount of PDS was added to it to continuously change the concentration in the sample. The reaction was shaken for 3 hours in a shaker, and the two effectively removed BPA; when the concentration of PDS was 5mM , its removal process and effect are as follows Figure 5 In this example, by continuously changing the added concentration of PDS, it is found that the effective removal of BPA can be achieved when the PDS concentration is 3 mM to 9 mM, and the removal rate is greater than 91%. The optimal PDS ...

Embodiment 3

[0106] see attached Image 6 , the method for treating BPA-containing sewage and the ball-milling modified magnetic biochar composite material Fe provided by the embodiment of the present invention 3 O 4 @MBC and its preparation method are basically the same as those in Examples 1 and 2, except that:

[0107] Described step C), also comprises the following steps:

[0108] C-1) When the pH value of the measured sewage sample solution is not in the range of 3-9, add 0.1-0.5 M acid (such as acetic acid, etc.) or basic compound containing metal cations (such as NaOH, etc.) The pH of the samples was adjusted to 3-9, synergistic with Fe 3 O 4 @MBC material, catalyzes PDS, removes BPA in water.

[0109] Specifically, a sewage sample with a BPA concentration of 20 mg / L was obtained, the pH value of the sample was 11, and Fe was added. 3 O 4 The concentration of @MBC was 0.5 g / L, the concentration of PDS was 5 mM, and then the pH regulator (acid or alkali) was added to adjust th...

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Abstract

The invention discloses a treatment method for BPA-containing sewage, a ball-milling modified magnetic biochar composite material and a preparation method thereof. The treatment method is as follows: A) preparing Fe 3 o 4 @MBC; B) Obtain BPA-containing sewage samples and measure BPA concentration; C) Test the pH value of sewage; D) Add PDS and Fe in different proportions 3 o 4 @MBC, get the best feeding ratio; E) According to the best feeding ratio, Fe 3 o 4 @MBC is added to the sewage containing BPA, which catalyzes PDS, and the two jointly complete the degradation and removal of BPA in the water. The invention also discloses a ball-milled modified magnetic biochar composite material, which is obtained by loading Fe on the surface of the ball-milled biochar 3 o 4 Scale-like black solid powder composite material obtained by lamellae. The invention also discloses a preparation method of the material. The material adopted in the invention has a unique load structure, and the sewage treatment effect is good and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and magnetic composite materials, and particularly relates to a treatment method of BPA-containing sewage and a ball-milled modified magnetic biochar composite material. Background technique [0002] Bisphenol A, also known as BPA, is an organic compound with the molecular formula C 15 H 16 O 2 . In industry, bisphenol A is used to synthesize materials such as polycarbonate (PC) and epoxy resin. It has been used since the 1960s in the manufacture of plastic (milk) bottles, sippy cups for young children, and the inner coating of food and beverage (milk powder) cans. [0003] Bisphenol A is one of the most widely used industrial compounds in the world, mainly used in the production of polycarbonate, epoxy resin, polysulfone resin, polyphenylene ether resin, unsaturated polyester resin and other polymer materials. It can also be used to produce plasticizers, flame retardants, antioxidan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01J23/745B01J21/18B01J35/00B01J37/00C02F101/34
CPCB01J21/18B01J23/745B01J35/0033B01J37/0036C02F1/725C02F2101/345
Inventor 于云江常兆峰郭浩博李良忠向明灯
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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