Tauchert Elias, Schneider Silvana, de Morais Josmaria Lopes, Peralta-Zamora Patricio
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.
Chemosphere. 2006 Aug;64(9):1458-63. doi: 10.1016/j.chemosphere.2005.12.064. Epub 2006 Feb 13.
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.
本文报道了采用光电化学方法处理垃圾渗滤液的研究。将该光化学系统应用于未经处理的渗滤液时，由于样品特有的深色，光化学系统受到显著阻碍。在此条件下，降解过程主要是电化学过程，典型的颜色去除率和化学需氧量（COD）去除率分别约为50%和20%。当采用先前的化学沉淀工艺以去除有色物质（主要是腐殖质）时，脱色率和COD去除率分别提高到90%和60%。考虑到渗滤液极其复杂的特性及其对传统降解过程通常具有的抗性，本文报道的结果证明了光电化学过程在修复难降解残留物方面具有很高的潜力。
