Regeneration of Activated Carbon Using Photo-Oxidation Process

Abstract

Activated carbon has been used as an adsorbent for centuries. For purpose of regeneration, advanced oxidation processes is sugested, this approcah could be viable from the econmic and environmental point of view, and appears as an alternative to the many of inefficient single-step processes actaully applied for the regeneration process. The results showed that the Titanium dioxide can easily regenerate the AC by oxidizing the organic compounds adsorbed on the surface of AC. The increase of UV light intensity has a positive effect on the adsorption capacity. However, the increase of TiO2 concentrations have a small negative effect on the adsorption capacity of the AC. Keywords: regeneration, activated carbon, photo-catalyst

Adsorption of methanol from methanol–water mixture by activated carbon and its regeneration using photo-oxidation process

“…He concluded only 20 ppm of phenol was removed. Al-Dawery [29] demonstrated that the ability of TiO 2 for regeneration of AC increased by increasing the intensity of UV light.…”

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To cite this article: Salam K. Al-Dawery (2014): Adsorption of methanol from methanol-water mixture by activated carbon and its regeneration using photo-oxidation process, Desalination and Water Treatment, Activated carbon (AC) has been used as an adsorbent for centuries as a result of its ability to remove a large variety of compounds from contaminated waters. The objective of this study was to investigate the removal of methanol by adsorption and the use of advanced oxidation process for the regeneration of the exhausted AC as an alternative to thermal, biological, and chemical methods that are currently applied.

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A review of prospects and challenges of photocatalytic decomposition of volatile organic compounds (VOCs) under humid environment

“…[ 139 ] The PCO process, which promotes the breakdown of organic substances when exposed to UV radiation, is another means of regeneration. [ 140 ] Satter et al [ 141 ] used heat treatment of the spent catalyst in a He flow and regenerated the original activity for subsequent reaction. Another group of investigators demonstrated the use continuous adsorption and electrochemical regeneration using an air‐lift reactor.…”