Study on Regeneration of Spent Activated Carbon by Using a Clean Technology

Reusing old filters with microwave chemistry.

(De Gruyter) – Activated carbons (AC) display applications for liquid stream purification and treatment of pollutants due to their large surface areas, which results in increased adsorption. However, pollutants are continuously accumulated reducing the activated carbons’ efficacy over time. Spent ACs are burnt, dumped, or disposed of in landfills.

Reusing these materials is therefore beneficial and the focus of the authors who have used microwave regeneration of spent activated carbon saturated with organic compounds.

Microwave regeneration temperature and time showed significant influence on iodine adsorption and yield of regenerated activated carbon (RAC). The RAC had a higher surface area (743.6~264.1 m2/g), total pore volume (0.54~0.22 cm3/g), and a smaller average pore width (28.83~33.58 nm) compared to the spent catalyst.

The separation mechanism for activated carbon and organic impurities was determined.


Edited for Content and Length by Dr. Matthew A. Hood.

The original full article can be found at De Gruyter in the journal Green Processing and Synthesis.

DOI: 10.1515/gps-2016-0110

Feature Photo/GettyImages

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