Overview
Activated carbon is a form of carbon processed to have small, low-volume pores that increase the surface area for adsorption or chemical reactions. It is produced from carbon-rich materials like wood, coconut shells, or coal through physical or chemical activation. Due to its exceptional adsorption properties, it is a critical material in environmental and industrial applications. Activated carbon is categorized into powdered (PAC), granular (GAC), and extruded (EAC) forms, each suited for specific uses. Its effectiveness depends on pore structure, surface area, and chemical composition, making it versatile for purification and catalysis.
Physical and Chemical Properties
Activated carbon's defining feature is its extensive surface area, typically ranging from 500 to 1500 m²/g, achieved through a network of micro-, meso-, and macropores. This structure enables it to adsorb a wide range of contaminants, including organic compounds, chlorine, and heavy metals. It is chemically inert under normal conditions but can react with strong oxidizers. The material is hydrophobic, making it ideal for organic compound removal. Its electrical conductivity and thermal stability further expand its utility in specialized applications like electrodes and catalyst supports.
Main Applications
In water treatment, activated carbon removes organic pollutants, chlorine, and odors, ensuring safe drinking water and wastewater compliance. Air purification systems use it to capture volatile organic compounds (VOCs) and toxins in industrial emissions. The pharmaceutical industry employs activated carbon for detoxification, such as in poison treatment capsules. In gold mining, it extracts gold from cyanide leach solutions. Additionally, it serves as a catalyst carrier in chemical manufacturing and a decolorizing agent in food processing.
Safety and Storage
While non-toxic, powdered activated carbon poses inhalation risks, requiring dust masks and proper ventilation during handling. It should be stored away from oxidizing agents to prevent combustion, as it is highly flammable in fine particulate form. Bulk storage must avoid moisture to maintain adsorption efficiency. Spills should be cleaned with non-sparking tools to minimize fire hazards. For industrial use, material safety data sheets (MSDS) must be reviewed to comply with regional regulations.
B2B Procurement Guide
Buyers should prioritize suppliers who provide certified analysis reports, including iodine number (adsorption capacity), particle size distribution, and ash content. For water treatment, coal-based GAC is cost-effective, while coconut-shell carbon excels in air purification due to its microporosity. Consider packaging options (bulk bags vs. drums) based on logistics needs. Long-term contracts with suppliers can stabilize pricing, which fluctuates with raw material (e.g., coconut shell) availability. Verify compliance with standards like ASTM or EU REACH for export markets.
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