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Treatment method of BPA-containing sewage and ball-milling modified magnetic biochar composite material

A composite material and processing method technology, which is applied in the field of ball-milling modified magnetic biochar composite materials, can solve the problems of large surface fragmentation of ball-milling modified materials, increasing the difficulty and cost of preparing materials, and the existence of ecological health and safety risks. It is conducive to large-scale promotion, improved removal performance, and stable degradation effect

Active Publication Date: 2021-08-10
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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  • Treatment method of BPA-containing sewage and ball-milling modified magnetic biochar composite material
  • Treatment method of BPA-containing sewage and ball-milling modified magnetic biochar composite material
  • Treatment method of BPA-containing sewage and ball-milling modified magnetic biochar composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0061] The treatment method that contains BPA sewage provided by the present embodiment, it may further comprise the steps:

[0062] A) Preparation of ball-milled modified magnetic biochar composite Fe as a BPA-containing sewage 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) Adding PDS to achieve a concentration of 5 mM in the sewage sample, and then taking different proportions of ball-milled modified magnetic biochar composite material Fe 3 o 4 @MBC, respectively added to the sewage samples containing BPA, shaken in the shaking table for 3 hours, found that the removal rate corresponding to different concentration will change, the removal rate increases with Fe 3 o 4 The amount ...

Embodiment 2

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

[0099] Obtain a sewage sample with a BPA concentration of 20mg / L. The pH value of the sample is 6.62. Fe 3 o 4 The concentration of @MBC is 0.5 g / L, and a certain amount of PDS is added to it to make the concentration in the sample change continuously, and the reaction is shaken in a shaking table for 3 hours, and the two can effectively remove BPA; when the concentration of PDS is 5mM , its removal process and effect are as follows Figure 5 As shown; the present embodiment tests by continuously changing the added concentration of PDS, and found that when the PDS concentration is 3 mM-9 mM, the effective removal of BPA can be realized, and the removal rate is greater than 91%, and the op...

Embodiment 3

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

[0107] The step C) also includes the following steps:

[0108] C-1) When the pH value of the measured sewage sample solution is not within the range of 3-9, add 0.1-0.5 M acid (such as acetic acid, etc.) or alkaline compounds containing metal cations (such as NaOH, etc.) The pH of the sample was adjusted to 3-9, synergistically 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 3 o 4 The concentration of @MBC is 0.5 g / L, the concentration of PDS is 5 mM, and then the pH regulator (acid or alkali) is added to adjust the pH value t...

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Abstract

The invention discloses a treatment method of BPA-containing sewage, a ball-milling modified magnetic biochar composite material and a preparation method thereof. The treatment method comprises the following steps: A) preparing Fe3O4@MBC; B) obtaining a BPA-containing sewage sample, and measuring the BPA concentration; C) detecting the pH value of the sewage; D) adding PDS, and adding Fe3O4@MBC in different proportions to obtain an optimal feeding proportion; and E) adding the Fe3O4@MBC into the sewage containing the BPA according to the optimal feeding proportion, catalyzing PDS by the Fe3O4@MBC, and degrading and removing the BPA in the water body by the Fe3O4@MBC and the PDS. The invention also discloses a ball-milling modified magnetic biochar composite material which is a flaky black solid powder composite material obtained by loading a Fe3O4 sheet layer on the surface of ball-milling biochar. The invention also discloses a preparation method of the material. The material adopted by the invention has a unique load structure, and is good in sewage treatment effect and low in cost.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and magnetic composite materials, and in particular relates to a treatment method for sewage containing BPA 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. Since the 1960s, it has been used to make plastic (milk) bottles, suction cups for young children, and coating the inside 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 in the production of plasticizers, flame retardants, antioxid...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J23/745B01J21/18B01J35/00B01J37/00C02F101/34
CPCC02F1/725B01J23/745B01J21/18B01J37/0036C02F2101/345B01J35/33
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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