Abstract
Electrooxidation of waste activated sludge (WAS) was performed using boron-doped diamond (BDD) electrodes to evaluate the removal of emerging pollutants: 4-[2-(4-hydroxyphenyl) propan-2-yl]phenol (bisphenol A); nonylphenols (including isomers); and (5-chloro-2-(2,4-dichlorophenoxy)phenol) (triclosan). The applied current density was 28.5mAcm−2, and the treatment times evaluated were 60, 120, and 180min. Partial degradation of selected emerging pollutants was obtained with efficiencies of 51% for bispenol A, 69% for nonylphenols, and 62% for triclosan. Organic matter was partially oxidized, mainly in the soluble phase. Most of the organic matter (78%) and emerging pollutants (>98%) were found to associate with solid particles in WAS, which limited the efficiency of the process.
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