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Method for removing bromate through ordered mesoporous carbon loaded nanoscale zero-valent iron material

A nano-zero-valent iron and mesoporous carbon technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve the effect of simple operation, simple and convenient process, and simple process

Inactive Publication Date: 2013-08-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0023] The present invention aims at the deficiencies in the existing bromate adsorption reduction removal technology and the problem that the ordered mesoporous carbon-loaded nano-zero-valent iron composite material has not been applied in bromate adsorption reduction removal, and provides a simple and convenient reduction process. Method for removing bromate by ordered mesoporous carbon-supported nano-zero-valent iron material with high removal efficiency

Method used

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  • Method for removing bromate through ordered mesoporous carbon loaded nanoscale zero-valent iron material
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  • Method for removing bromate through ordered mesoporous carbon loaded nanoscale zero-valent iron material

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Experimental program
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Effect test

Embodiment 1

[0039] This embodiment is to verify that temperature and reaction time have the effect on BrO 3 － The effect of removal rate.

[0040] Measure 3 groups (7 parts in each group) of 100mL of 1mg / L BrO 3 － Put the solution into a 250mL Erlenmeyer flask, adjust the pH value to 5.0-6.0 with hydrochloric acid or sodium hydroxide solution, and add 0.035g of Fe with a loading rate of 25% 0 / OMC composite material, the three groups of mixed solutions were placed in constant temperature water bath oscillators with temperatures of 15°C, 25°C and 35°C for reaction, and the oscillation speed was 200rpm. Each group of solutions was reacted in turn for 1 minute, 5 minutes, 10 minutes, 15 minutes, 30 minutes, 60 minutes and 120 minutes, and the BrO in the solution was determined. 3 － and Br - concentration. The result is as figure 1 Shown, BrO 3 － The removal rate increases with the increase of the reaction time, and the removal rate reaches more than 90% after 10 minutes, and basica...

Embodiment 2

[0044] The difference from Example 1 is that this example is to verify that BrO 3 － Solution pH vs. BrO 3 － The effect of removal rate.

[0045] Take 8 parts of 100mL with a concentration of 1mg / LBrO 3 － Put the solution into a 250mL Erlenmeyer flask, use hydrochloric acid or sodium hydroxide solution to make its pH in the range of 3-10, and add 0.035g of ordered mesoporous carbon-loaded nano-zero-valent iron composite material with a loading rate of 25% respectively. The 8 parts of the mixed solution were placed in a constant temperature water bath oscillator with a temperature of 25°C for reaction, the rotation speed was 200rpm, and the oscillation mode was a loop oscillation; at 20 minutes, the BrO in the solution was measured. 3 － and Br － . The result is as image 3 As shown, it shows that the pH value has a great influence on the removal of bromate, and the smaller the pH value, the higher the removal rate. The removal rate of bromate was 100% at pH=3.0, and de...

Embodiment 3

[0047] The difference from Example 1 is that this example is to verify that BrO 3 － The initial concentration of the solution vs. BrO 3 － The effect of removal rate.

[0048] Take 4 parts of BrO 3 － 100mL solutions with concentrations of 1mg / L, 3mg / L, 6mg / L and 10mg / L were placed in a 250mL Erlenmeyer flask, and the pH was within the range of 5.0-6.0 with hydrochloric acid or sodium hydroxide solution. 0.035g of ordered mesoporous carbon-loaded nano-zero-valent iron composite material with a loading rate of 25%, put the 4 parts of the mixed solution in a constant temperature water bath oscillator at a temperature of 25°C for reaction, the rotation speed is 200rpm, and the oscillation mode is a loop type Shake; at 30 minutes, measure the BrO in the solution 3 － and Br － concentration. The result is as Figure 4 As shown, it shows that the initial concentration of bromate has a great influence on the removal rate. With the increase of the initial concentration, the amo...

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Abstract

The invention provides a method for removing bromate through an ordered mesoporous carbon loaded nanoscale zero-valent iron material. The method comprises the following steps of: adjusting pH (Potential Of Hydrogen) of a BrO3-solution at initial concentration of 1 to 10mg / L to 3 to 10; adding0.35g of an ordered mesoporous carbon loaded nanoscale zero-valent iron composite material with load rate being 25% to 1L of the BrO3<->solution; and reacting the mixed solution for 1 to 120 minutes at an oscillating speed of 200 rotations per minute in a constant-temperature water bath oscillator at 15 to 35 DEG C. The method can be performed under various conditions, can effectively remove BrO3<-> out of water, and has the characteristics of simple and convenient process, high reducing and removing efficiency and fast removing; the removal rate can be more than 90% after reacting for 5 minutes; and the total iron amount in the water is not detected. Therefore, the method has a good application prospect in purification of bromate ions in the drinking water.

Description

technical field [0001] The invention relates to a method for removing bromate through adsorption and reduction of ordered mesoporous carbon-supported nano-zero-valent iron composite materials, and belongs to the technical field of ordered-mesoporous carbon-supported nano-zero-valent iron materials. Background technique [0002] One of the most commonly used disinfection methods for drinking water is ozone disinfection. Bromine ion will be produced as a by-product after ozone disinfection of bromine-containing source water. It is a carcinogenic and genotoxic substance and has been listed as a Class 2B potential carcinogen. Studies have shown that when BrO in drinking water 3 - When the mass concentration is greater than 0.05 μg / L, it has a potential carcinogenic effect on the human body. Bromate is a toxic by-product that is inevitably produced in the process of extensive use of ozone for sterilization by various drinking water industry manufacturers. Therefore, eliminati...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/28C02F101/12
Inventor 许春华王晓红林盛朱留佳陈亚明
Owner SHANDONG UNIV
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