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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.)

Assessment of p-aminophenol oxidation by simulating the process of hair dyeing and occurrence in hair salon wastewater and drinking water from treatment plant

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Author(s):
de Souza, Joao Carlos [1] ; da Silva, Bianca Ferreira [1] ; Morales, Daniel Alexandre [2] ; Umbuzeiro, Gisela de Aragao [2] ; Boldrin Zanoni, Maria Valnice [1]
Total Authors: 5
Affiliation:
[1] Sao Paulo State Univ UNESP, Dept Analyt Chem, Natl Inst Alternat Technol Detect Toxicol Evaluat, Inst Chem, Rua Prof Francisco Degni 55, BR-14800060 Araraquara, SP - Brazil
[2] State Univ Campinas UNICAMP, Fac Technol, Rua Paschoal Marmo 1888, BR-13484332 Limeira, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF HAZARDOUS MATERIALS; v. 387, APR 5 2020.
Web of Science Citations: 2
Abstract

This work reports the study of oxidation reaction of p-aminophenol (PAP) in ammoniacal medium in dissolved atmospheric oxygen and hydrogen peroxide, simulating the process of hair dyeing with permanent dyes. The products formed, which included semi-quinoneimine radical, quinoneimine, dimers, trimers and tetramers, were identified by mass spectrometry, infrared spectroscopy, UV-vis spectrophotometry, and nuclear magnetic resonance of hydrogen. The process was found to involve an autoxidation mechanism. The mutagenicity of the products was carried out by Salmonella Typhimurium YG1041 assay, and the results indicated no mutagenic properties. The presence of PAP and its oxidative products in samples of wastewater collected from hairdressing salon effluent (WW), raw river water (RRW), and water inlet and outlet of drinking water treatment plant (DWTP) was analyzed by HPLC-DAD. PAP was detected in the collected samples of WW, water samples from DWTP (before and after treatment), at concentrations of 2.1 +/- 0.5 mg L-1, 1.9 +/- 0.3 x 10(13) mg L-1 and 1.3 +/- 0.2 x 10(-3) mg L-1, respectively. The reaction products, including dimers, trimers and tetramers were identified only in the WW sample; this shows that both the precursor in the sample and its derivatives were released into the wastewater. (AU)

FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 15/18109-4 - Contribution of Nanostructured Materials in Electroanalysis of pharmaceuticals and dyes, in the oxidation and reduction photoeletrocatalytic process of Inorganic and Organic Pollutants and Water Disinfection.
Grantee:Maria Valnice Boldrin
Support Opportunities: Regular Research Grants
FAPESP's process: 15/12998-1 - Chromatographic and electroanalytical methods applied in determination of p-toluenediamine and p-aminophenol in oxidative medium used in permanent hair dye.
Grantee:João Carlos de Souza
Support Opportunities: Scholarships in Brazil - Doctorate
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