Activated Carbon Laboratory Analysis
At GEE, we provide comprehensive technical consulting and laboratory testing services for all types of activated carbon. Adsorption, a process that involves the adhesion of dissolved substances to the surface of a solid, is a fundamental aspect of activated carbon’s functionality. With its large internal surface up to 1500 m2/g, activated carbon surpasses other materials in its effectiveness for physical adsorption. Activated carbon serves as the ideal solid medium for adsorption, particularly in the removal of soluble organic substances in municipal and waste water treatment applications. To accurately assess its usage, effectiveness and relative advantages in liquid phase applications, a complete experimental evaluation is essential.
Porous activated carbon particle provides a large surface area for water treatment applications (Lemley et al.,1995)
Isotherm Testing
Isotherm testing serves as a crucial method to quantitatively assess the performance of activated carbon, particularly its adsorption ability and capacity. By establishing the relationship between the concentration of adsorbate (e.g. phenol or methylene blue) and the adsorption capacity of the carbon, our specialized equipment and experienced lab experts can generate high-resolution isotherm curves.
Adsorption Isotherm (Schneiter & et al.,1985)
Column Testing
Following isotherm testing, column testing is employed to qualitatively evaluate the performance of activated carbon. This testing method involves the use of columns arranged in series and subjected to testing at different linear velocities. Despite its benefits, column testing presents challenges such as back mixing, axial dispersion and wall effects. The data obtained from column testing offers valuable information, including:
Column Arrangement for Pilot Testing (Gabelman, 2017)
Physicochemical Properties Characterization
GEE possesses the capability to analyze the physicochemical properties of carbon samples using analytical instrument, including:
Physicochemical Properties Characterization
FAQ
Spent activated carbon reactivation is the process of restoring used (spent) activated carbon to its original adsorption capacity. During use, activated carbon absorbs contaminants, reducing its effectiveness. Reactivation involves heating the spent carbon in a furnace to high temperatures, usually in the presence of steam or sometimes an inert gas, to remove the adsorbed contaminants and restore its porous structure.
Reactivating spent activated carbon reduces waste, conserves resources and lowers the need for new carbon, contributing to a more sustainable and environmentally friendly process.
Reactivated carbon is suitable for many applications, but its performance may vary depending on the contaminants and the level of reactivation. We can help assess if it is appropriate for your specific needs.
GEE adheres to strict environmental regulations by using advanced reactivation technologies that minimize emissions and ensure the safe handling and disposal of waste products.
The typical turnaround time for the reactivation process is 7 to 10 days, depending on the volume and type of spent activated carbon being processed.
Reference:
Gabelman, A. (2017). Adsorption Basics Part 1. American Institute of Chemical Engineers (AlChE).
Retrieved from URL [ 5 January 2021]
Lemley, A. et al. (1995). Activated Carbon Treatment of Drinking Water. Cornell University Cooperative Extension.
Retrieved from URL [Accessed 5 January 2021]
Schneiter, R. W., et al. (1985). A Carbon Adsorption Isotherm Test for Volatile Organic Chemicals in Water. Journal (Water Pollution Control Federation), vol. 57, no. 5, 1985, pp. 403–405.
Retrieved from URL [Accessed 5 Jan. 2021]