Treatment of textile dyeing baths by photo-Fenton processes and evaluation of the reuse potentiality

Quimica nova

Scharf, Mauro¹  Zanella, Geovani¹  Vieira, Giovana Aparecida¹  Peralta-Zamora, Patricio² 

[1] Fundação Universidade Regional de Blumenau, Blumenau, Brasil;Universidade Federal do Paraná, Curitiba, Brasil

关键词: dyeing;    photo-Fenton;    reuse.;   

DOI  :  10.1590/S0100-40422010000500006

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this work thetreatment of textile dyeing baths by a sequential reductive-oxidative processwas evaluated, aiming its utilization in new dyeing process. The results demonstratedthat reactive dyes can be easily degraded by reductive processes mediated byzero-valent iron, a fact that induces decolorizations of about 80%. Sequentialphoto-Fenton processes permit almost total removal of the residual color withelimination of 90% of the COD content. The reuse of treated residues permitsthe achievement of materials that attend practically all textile specifications,with exception of the color difference parameter (ΔE),which is unsatisfactory toward the importation standards, but adequate for thenational market.

【 授权许可】

CC BY