Author(s):
de Souza, João Carlos [UNESP] ; da Silva, Bianca Ferreira [UNESP] ; Morales, Daniel Alexandre ; Umbuzeiro, Gisela de Aragão ; Zanoni, Maria Valnice Boldrin [UNESP]
Date: 2020
Persistent ID: http://hdl.handle.net/11449/200017
Origin: Oasisbr
Subject(s): Hair dye precursors; Hair salon effluents; Mutagenicity evaluation; P-aminophenol oxidation; Permanent hair dyes; Hair dye precursors; Hair dye precursors; Hair salon effluents; Hair salon effluents; Mutagenicity evaluation; Mutagenicity evaluation; P-aminophenol oxidation; P-aminophenol oxidation; Permanent hair dyes; Permanent hair dyes
Description
Made available in DSpace on 2020-12-12T01:55:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-04-05
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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 × 10-3 mg L−1 and 1.3 ± 0.2 × 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.
São Paulo State University (UNESP) Institute of Chemistry Department of Analytical Chemistry National Institute of Alternative Technologies for the Detection Toxicological Evaluation and Removal of Micropollutants and Radioactivies (INCT-DATREM), Rua Professor Francisco Degni, 55
State University of Campinas (UNICAMP) Faculty of Technology, Rua Paschoal Marmo, 1888
São Paulo State University (UNESP) Institute of Chemistry Department of Analytical Chemistry National Institute of Alternative Technologies for the Detection Toxicological Evaluation and Removal of Micropollutants and Radioactivies (INCT-DATREM), Rua Professor Francisco Degni, 55
FAPESP: 2008/10449-7
FAPESP: 2015/12998-1
FAPESP: 2015/18109-4
