ATR-FTIR and LC-Q-ToF-MS analysis of indoor dust from different micro-environments located in a tropical metropolitan area.

Autor: Vishnu Sreejith M; Schoool of Environmental Sciences, Mahatma Gandhi University (MGU), Kottayam 686560, Kerala, India., Aradhana KS; School of Environmental Studies, Cochin University of Science & Technology (CUSAT), Kochi 682022, Kerala, India., Varsha M; School of Environmental Studies, Cochin University of Science & Technology (CUSAT), Kochi 682022, Kerala, India., Cyrus MK; Inter University Instrumentation Centre (IUIC), Mahatma Gandhi University (MGU), Kottayam 686560, Kerala, India., Aravindakumar CT; Schoool of Environmental Sciences, Mahatma Gandhi University (MGU), Kottayam 686560, Kerala, India; Inter University Instrumentation Centre (IUIC), Mahatma Gandhi University (MGU), Kottayam 686560, Kerala, India. Electronic address: cta@mgu.ac.in., Aravind UK; School of Environmental Studies, Cochin University of Science & Technology (CUSAT), Kochi 682022, Kerala, India.. Electronic address: ukaravind@gmail.com.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Aug 20; Vol. 783, pp. 147066. Date of Electronic Publication: 2021 Apr 15.
DOI: 10.1016/j.scitotenv.2021.147066
Abstrakt: Indoor dust is an important matrix that exposes humans to a broad spectrum of chemicals. The information on the occurrence of contaminants of emerging concern (CECs), their metabolites, and re-emerging contaminants in indoor dust is rather limited. As the indoor environment is exposed to various chemicals from personal care products, furniture, building materials, machineries and cooking/cleaning products, there is a high chance of the presence of hazardous contaminants in indoor dust. In the present study, dust samples were collected from four different micro indoor environments (photocopying centres, residential houses, classrooms, and ATM cabins) located in an urban environment located in India's southwestern part. The collected samples were subjected to ATR - FTIR and LC-Q-ToF-MS analyses. The ATR - FTIR analysis indicated the presence of aldehydes, anhydrides, carboxylic acids, esters, sulphonic acids, and asbestos - a re-emerging contaminant. A total of 19 compounds were identified from the LC-Q-ToF-MS analysis. These compounds belonged to various classes such as plasticisers, plasticiser metabolites, photoinitiators, personal care products, pharmaceutical intermediates, surfactants, and pesticides. To the best of our knowledge, this is the first report regarding the presence of CECs in indoor environments in Kerala and also the suspected occurrence of pesticides (metaldehyde and ethofumesate) in classroom dust in India. Another important highlight of this work is the demonstration of ATR-FTIR as a complementary technique for LC-Q-ToF-MS in the analysis of indoor pollution while dealing with totally unknown pollutants. These results further highlight the occurrence of probable chemically modified metabolites in the tropical climatic conditions in a microenvironment.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021. Published by Elsevier B.V.)
Databáze: MEDLINE
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