Toxicity assessment of textile effluents treated by advanced oxidative process (UV/TiO2 and UV/TiO2/H2O2) in the species Artemia salina L.
Textile industry wastes raise a great concern due to their strong coloration and toxicity. The objective of the present work was to characterize the degradation and mineralization of textile effluents by advanced oxidative processes using either TiO(2) or TiO(2)/H(2)O(2) and to monitor the toxicity of the products formed during 6-h irradiation in relation to that of the in natura effluent. The results demonstrated that the TiO(2)/H(2)O(2) association was more efficient in the mineralization of textile effluents than TiO(2), with high mineralized ion concentrations (NH                   (4)                             (+)                 , NO                   (3)                             (-)                 , and SO                   (4)                             (2-)                 ) and significantly decreased organic matter ratios (represented by the chemical oxygen demand and total organic carbon). The toxicity of the degradation products after 4-h irradiation to Artemia salina L. was not significant (below 10 %). However, the TiO(2)/H(2)O(2) association produced more toxicity under irradiation than the TiO(2) system, which was attributed to the increased presence of oxidants in the first group. Comparatively, the photogenerated products of both TiO(2) and the TiO(2)/H(2)O(2) association were less toxic than the in natura effluent.
Departamento de Química, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900, Maringá, Parana, Brazil. jcgmoraes@uem.br
Juliana Carla
JC
Garcia
Thábata Karoliny Formicoly
TK
de Souza Freitas
Soraya Moreno
SM
Palácio
Elizangela
E
Ambrósio
Maísa Tatiane Ferreira
MT
Souza
Lídia Brizola
LB
Santos
Vitor
V
de Cinque Almeida
Nilson Evelázio
NE
de Souza
D000818:Animals; D001156:Artemia; D006861:Hydrogen Peroxide / Q000737:chemistry; D007220:Industrial Waste; D010083:Oxidants, Photochemical / Q000737:chemistry; D055668:Photochemical Processes; D013783:Textile Industry; D014025:Titanium / Q000737:chemistry; D018675:Toxicity Tests; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000633:toxicity*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D010083:Oxidants, Photochemical; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D014025:Titanium