Título:	Toxicity removal by Daphinia similis assay in BTEX contaminated groundwater using nanometric TiO2/ZrO2 film and black light.
Autoria:	DONAIRE, P. P. R. ASSALIN, M. R. DURAN, N.
Afiliação:	PATRICIA PULCINI ROSVALD DONAIRE, UFABC; MARCIA REGINA ASSALIN, CNPMA; NELSON DURAN, UNICAMP.
Ano de publicação:	2019
Referência:	Journal of Physics: Conference Series, v. 1323, n. 1, 2019. Edition of the Proceedings of VI NanoSAFE International Conference, Grenoble, Nov. 2018. Article 012012.
Conteúdo:	Abstract: In this work, a photocatalytic tubular reactor, with a nanometric TiO2/ZrO2film, immobilized on glass substrate, was developed in order to investigate the degradation of volatile organic compounds, such as, benzene, toluene, ethylbenzene and xylene (BTEX ) in groundwater sample, under black light irradiation (365nm). The BTEX compound were determined by solid phase microextraction (SPME) technique and analyzed by Gas Chromatography - Ionization Flame Detection (CG -FID). The efficiency of photocatalytic process was evaluated by determination of BTEX removal and toxicity, using Daphnia similis as organism-test. The influence of the initial concentration of BTEX in the degradation process was investigated. The degradation process of sample groundwater contaminated with BTEX (145? g/L) from gasoline, resulted in 90% of efficiency after 120 minutes of treatment. The toxicity (EC50-48 h) of the groundwater sample to Daphnia similis was 14.1% (10.5-19.0) for untreated samples. After 30 min of treatment, the EC50-48 h was of 84.3 (71-100%).The benzene efficiency removal was reduced in function of the increase of its initial concentrations that observation was not found for the other compounds studied.
Thesagro:	Águas Subterrâneas Poluição da Água Composto Orgânico Toxidez
NAL Thesaurus:	Organic compounds Toxicity Groundwater contamination Benzene Toluene BTEX (benzene, toluene, ethylbenzene, xylene)
ISSN:	1742-6596
Digital Object Identifier:	10.1088/1742-6596/1323/1/012012
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPMA)