Regeneration of phenol‐saturated activated carbon in an electrochemical reactor

Abstract

The regeneration of phenol-saturated activated carbon in an electrochemical reactor was investigated in order to develop a novel regeneration method of activated carbon. The regeneration of spent activated carbon saturated with phenol was conducted in a stirred electrochemical reactor under different operating conditions. The influences of operating parameters, such as regeneration current intensity and time, on regeneration efficiency were systematically investigated. The regeneration efficiency can reach over 80% under continuous stirring in the reactor, and it only decreases by less than 5% after four regeneration cycles. Electrochemical regeneration in the stirred electrochemical reactor is shown to be an effective method for the regeneration of phenol-saturated activated carbon with a much higher regeneration efficiency compared with a process using NaOH solution.

Treatment of an industrial chemical waste‐water using a granular activated carbon adsorption‐microwave regeneration process

“…Research on the regeneration of GAC mainly focus on chemical,10 electrochemical11, 12 and thermal13, 14 methods. Chemical methods demand the use of reagents and often give incomplete regeneration.…”

Removal of 4‐chlorophenol from contaminated water using coconut shell waste pretreated with chemical agents

“…The pollutant reacted with 4‐aminoantipyrine in the presence of K 3 Fe(CN) 6 , forming a colored antipyrine dye after 15 min reaction. The absorbance of the colored samples was measured at a wavelength (λ) of 500 nm 49. The minimum detectable quantity using this method is 10 µg L −1 of 4‐CP.…”

“…The absorbance of the colored samples was measured at a wavelength (λ) of 500 nm. 49 The minimum detectable quantity using this method is 10 µg L −1 of 4-CP. The amount 4-CP adsorbed was calculated as the difference between the initial concentration of 4-CP and its final concentration in equilibrium conditions.…”

Regeneration strategies for spent solid matrices used in adsorption of organic pollutants from surface water: a critical review

“…Electrochemical regeneration has been used for regeneration of adsorbents loaded with toluene, phenol, crystal violet dye, and p-nitrophenol [162,[173][174][175][176]. Narbaitz and McEwen [177] and Zhang et al [169] carried out detailed investigations into the use of electrochemical regeneration of granular activated carbon (GAC) loaded with phenol, achieving regeneration efficiencies up to 95%.…”