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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Aquatic toxicity of dyes before and after photo-Fenton treatment

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de Luna, Luis A. V. [1] ; da Silva, Thiago H. G. [2] ; Pupo Nogueira, Raquel F. [2] ; Kummrow, Fabio [3, 1] ; Umbuzeiro, Gisela A. [1]
Total Authors: 5
[1] Univ Estadual Campinas, UNICAMP, Fac Technol, BR-13484332 Limeira, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Dept Quim Anal, Inst Quim Araraquara, BR-14800900 Sao Paulo, SP - Brazil
[3] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, BR-09972270 Diadema, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF HAZARDOUS MATERIALS; v. 276, p. 332-338, JUL 15 2014.
Web of Science Citations: 64

This study evaluated the ecotoxicity of five dyes to freshwater organisms before and during their photo-Fenton degradation. EC50 (48 h) of the five tested dyes ranged from of 6.9 to >1000 mg L-1 for Daphnia similis. In the chronic tests IC50 (72 h) varied from 65 to >100 mg L-1 for Pseudokirchneriella subcapitata and IC50 (8 days) from 0.5 to 410 mg L-1 for Ceriodaphnia dubia. Toxicity tests revealed that although the applied treatment was effective for decolorization of the dye, the partial mineralization may be responsible for the presence of degradation products which can be either more toxic than the original dye, as is the case of Vat Green 3 and Reactive Black 5, lead to initially toxic products which may be further degraded to non toxic products (acid Orange 7 and Food Red 17), or generate non toxic products as in the case of Food Yellow 3. The results highlighted the importance of assessing both acute and chronic toxicity tests of treated sample before effluent discharge. (C) 2014 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 10/13874-0 - Influence of the structure of azo dyes on the degradation kinetics using photo-Fenton and zero valent iron processes and on toxicity
Grantee:Thiago Henrique Gomes da Silva
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 08/10449-7 - Assessment of occurrence, toxicity/genotoxicity and degradation processes of dyes in effluents and surface water
Grantee:Maria Valnice Boldrin
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 10/12991-3 - Characterization of the ecotoxicity of textile dyes and its byproducts after advanced oxidative treatments
Grantee:Luis Augusto Visani de Luna
Support Opportunities: Scholarships in Brazil - Master