Method for preparing test materials for thermal demercuration treatment technology of mercury-containing activated carbon

Abstract

This invention provides a method for preparing test materials for a thermal mercury removal treatment technology using mercury-containing activated carbon. The method includes the following steps: mixing a mercury standard solution with deionized water to form a first solution, and adding activated carbon powder to the first solution in a specific ratio to obtain a viscous mixed solution; thoroughly shaking the mixed solution and then filtering it to obtain mercury-containing activated carbon and filtrate; and placing the mercury-containing activated carbon on a glass dish and air-drying it at room temperature to obtain test materials with a mercury adsorption rate between 60% and 70%. This preparation method can rapidly produce test materials for optimizing the thermal mercury removal process and determining the optimal operating parameters such as temperature, time, and feed rate for thermal mercury removal to ensure removal efficiency and alleviate mercury pollution problems.

Claims

1. A method for preparing test materials for a thermal mercury removal treatment technology of mercury-containing activated carbon, comprising: Step S1: Mix mercury standard solution with deionized water to form a first solution, and then add activated carbon powder into the first solution to obtain a viscous mixed solution; The ratio of activated carbon powder to the first solution is 1 to 5 grams / 4 to 9 milliliters; Step S2: The mixed solution is placed in an ultrasonic shaker and shaken thoroughly for 18 to 24 hours; Step S3: The mixed solution is filtered to obtain mercury-containing activated carbon and filtrate; and Step S4: The mercury-containing activated carbon is air-dried at room temperature to obtain the test material.

2. The preparation method as described in claim 1, wherein the activated carbon powder is a powdered activated carbon, and the specific surface area of ​​the activated carbon powder is between 830 and 1000 m2 / g.

3. The preparation method as described in claim 1, wherein the concentration of the mercury standard solution is 1000 μg / ml.

4. The preparation method as described in claim 1, wherein in step S2, the mixed solution is placed in the ultrasonic shaker and shaken thoroughly for 24 hours.

5. The preparation method as described in claim 1, wherein in step S2, the mixed solution is shaken up and down 1 to 5 times during the shaking.

6. The preparation method as described in claim 1, wherein step S3 involves filtering the mixed solution using a vacuum filtration device to obtain the mercury-containing activated carbon and the filtrate.

7. The preparation method as described in claim 1, wherein step S4 involves placing the mercury-containing activated carbon on a glass dish and placing the glass dish in a fume hood to air dry at room temperature.

8. The preparation method as described in claim 1, wherein the mercury adsorption rate of the test material is between 60% and 70%.

9. The preparation method as described in claim 1, wherein the weight ratio of mercury to activated carbon powder in the mixed solution is 0.25 to 0.56.

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