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The influence of activated carbon on pH value is mainly reflected in the following aspects:

Optimal pH range:

Activated carbon showed the best adsorption effect under acidic conditions with pH 3-6. This is because in this pH range, activated carbon has the most active chemical properties and is able to adsorb acidic substances more effectively.

Effects of too high or low pH:

When the pH value is too high (greater than 7), the adsorption capacity of activated carbon will decrease, because the high pH value may lead to some chemical structure changes on the surface of activated carbon, reducing the adsorption capacity of pollutants.

In alkaline environment, the adsorption effect of activated carbon will also be affected, because desorption phenomenon may occur under alkaline conditions, further reducing the adsorption capacity.

Adjustments in practical applications:

In practical applications, such as water treatment and waste gas treatment, it is very important to control the appropriate pH. For example, activated carbon performs well when treating acidic wastewater or waste gas containing acidic pollutants; In the treatment of alkaline wastewater, it needs to be adjusted accordingly.

In conclusion, the adsorption effect of activated carbon is significantly affected by pH, so when designing and using activated carbon treatment systems, the change of pH must be considered, and the use and treatment methods of activated carbon must be adjusted accordingly to ensure the best adsorption effect.

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