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Activated Carbon for Mercury Removal

Date :2024-05-14
Classify: Activated Carbon
Mercury-containing waste gas refers to waste gas containing mercury compounds generated during industrial production, combustion processes or other related activities. These exhaust gases may contain elemental mercury (Hg0) or other mercury compounds, such as mercury oxide (HgO), methylmercury (CH3Hg+), etc. Activated carbon is a commonly used adsorbent with high adsorption capacity for mercury. When the exhaust gas passes through the activated carbon bed, mercury is adsorbed on the surface of the activated carbon, thereby achieving mercury removal in the exhaust gas.
This article will discuss mercury definition, sources, and how activated carbon removes mercury.
activated carbon for mercury removal

What is Mercury?

Mercury is a naturally occurring element found in various forms, including elemental mercury, inorganic mercury compounds, and organic mercury compounds like methylmercury. It is a potent neurotoxin that can bioaccumulate in the food chain, posing serious health risks to humans and wildlife alike.

Where Does Mercury Come From?

Mercury enters the environment through both natural processes and human activities. Natural sources include volcanic eruptions, weathering of rocks, and degassing from the Earth's crust. However, the majority of mercury pollution is attributed to human activities such as coal combustion, mining, industrial processes, and waste incineration.

How Does Activated Carbon Remove Mercury?

Activated carbon is a highly porous material with a large surface area, making it an excellent adsorbent for various pollutants, including mercury. The removal of mercury by activated carbon occurs through a process called adsorption, where mercury ions are attracted to the surface of the carbon particles and become physically or chemically bound to them.

Powdered Activated Carbon

activated carbon powder for mercury removal

Powdered activated carbon (PAC) is primarily used for waste incineration from mercury steam and treating metal mercury generated in sewage plants. In waste incineration processes, PAC is injected into the flue gas stream to adsorb mercury vapor, thus reducing mercury emissions. Similarly, in wastewater treatment plants, PAC can be added to adsorb soluble mercury compounds, preventing them from being discharged into the environment.
Item Powder activated carbon
Size 100mesh, 200mesh
Iodine 600-900mg/g
Moisture ≤10%
Hardness ≥95%
Bulk density ≤450g/l

Impregnated Activated Carbon

impregnated activated carbon for mercury removal
Impregnated activated carbon is predominantly used for removing mercury from flue gas emissions in coal-fired power plants and industrial boilers. This type of activated carbon is impregnated with chemicals such as sulfur or halogens, which enhance its mercury adsorption capabilities. When the flue gas containing mercury passes through a bed of impregnated activated carbon, the mercury is adsorbed onto the carbon surface, effectively reducing mercury emissions from the exhaust gases.
Item Impregnated sulfur activated carbon
Size 3mm, 4mm
Sulfur impregnated content ≥10%
CTC 60-100%
Moisture ≤5%
Hardness ≥95%
Bulk density ≥450g/l


Activated carbon emerges as a versatile and efficient solution for mercury removal across diverse environmental contexts. Whether it's mitigating atmospheric emissions from industrial processes or safeguarding water quality in wastewater treatment, the unique properties of activated carbon make it an indispensable tool in the fight against mercury pollution.
Zhulin Carbon has been in gas purification field for 20 years. For effective mercury control solutions, turn to Zhulin Carbon, your trusted partner in environmental stewardship.

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