Photochemically-assisted electrochemical degradation of landfill leachate.
In this work, the treatment of landfill leachates by a photoelectrochemical procedure is reported. When applied to untreated leachates the photochemical system was significantly hindered on account of the characteristic dark coloration of the samples. At this condition the degradation process was essentially electrochemical permitting typical color and COD removal of about 50% and 20%, respectively. When a previous chemical precipitation process was applied aiming the elimination of colored species (mainly humic substances) the decolorization and COD removal was extended to 90% and 60%, respectively. Considering the extremely complex character of the leachates and its usual resistance to conventional degradation processes the result reported here attest the high potentiality of photoelectrochemical processes to remediation of recalcitrant residues.
Grupo de desenvolvimento de técnicas avançadas para tratamento de resíduos (TECNOTRATER), Departamento de Química, Universidade Federal do Paraná, P.O. Box 19081, 81531-990 Curitiba, Brazil.
Elias
E
Tauchert
Silvana
S
Schneider
Josmaria Lopes
JL
de Morais
Patricio
P
Peralta-Zamora
D001673:Biodegradation, Environmental; D001938:Brazil; D004563:Electrochemistry; D006812:Humic Substances / Q000032:analysis*; D010777:Photochemistry; D012037:Refuse Disposal / Q000295:instrumentation / Q000379:methods* / Q000592:standards; D012989:Soil Pollutants / Q000032:analysis*; D014466:Ultraviolet Rays
D006812:Humic Substances; D012989:Soil Pollutants