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BTEX Assessment among Informal Charcoal-Burning Food Traders for Cleaner and Sustainable Environment

Author

Listed:
  • Lebogang Phama

    (Division of Occupational Health, School of Public Health, University of the Witwatersrand, Parktown, Johannesburg 2193, South Africa)

  • Goitsemang Keretetse

    (Division of Occupational Health, School of Public Health, University of the Witwatersrand, Parktown, Johannesburg 2193, South Africa)

  • Thokozani Mbonane

    (Department of Environmental Health, Faculty of Health Sciences, Doornfontein Campus, University of Johannesburg, Johannesburg 2028, South Africa)

  • Phoka Rathebe

    (Department of Environmental Health, Faculty of Health Sciences, Doornfontein Campus, University of Johannesburg, Johannesburg 2028, South Africa)

  • Robert Makae

    (Division of Occupational Health, School of Public Health, University of the Witwatersrand, Parktown, Johannesburg 2193, South Africa)

  • Masilu Daniel Masekameni

    (Developmental Studies, School of Social Sciences, University of South Africa, Pretoria 0003, South Africa)

Abstract

This study assessed the cleaner and sustainable environment by measuring emission levels of benzene, toluene, ethylbenzene, and xylene (BTEX) from informal food traders using charcoal as the primary source of energy at a flea market in Fordsburg, Johannesburg. Volatile organic compounds (VOCs) were measured using a real-time monitor (MiniRae 3000 photoionization detector); an indoor air quality (IAQ) monitor was used to monitor environmental parameters and passive samplers in the form of Radiello badges, which were used to determine BTEX emissions from charcoal used during food preparation. Measurements were taken at 1.5 m above ground assuming the receptor’s breathing circumference using PID and Radiello. PID data were downloaded and analyzed using Microsoft Excel (Version 2019). Radiellos were sent to the laboratory to determine the BTEX levels from the total VOCs. The total volatile organic compound (TVOC) concentration over the combustion cycle was 306.7 ± 62.8 ppm. The flaming phase had the highest VOC concentration (547 ± 110.46 ppm), followed by the ignition phase (339.44 ± 40.6 ppm) and coking with the lowest concentration (24.64 ± 14.3). The average BTEX concentration was 15.7 ± 5.9 µg/m 3 corresponding to the entire combustion cycle. BTEX concentrations were highest at the flaming phase (23.6 µg/m 3 ) followed by the ignition (13.4 µg/m 3 ) and coking phase (9.45 µg/m 3 ). Ignition phase versus the flaming phase, there was a significant difference at 95% at a p -value of 0.09; ignition phase versus the coking phase, there was a significant difference at 95% at a p -value of 0.039; and coking phase versus the flaming phase, there was a significant difference at 95% at a p -value of 0.025. When compared to the occupational exposure limits (OELs), none of the exposure concentrations (BTEX) were above the 8 h exposure limit. The findings of this study suggest that charcoal, as a source of energy, can still be a useful and sustainable fuel for informal food traders. Shortening the ignition and flaming phase duration by using a fan to supply sufficient air can further reduce exposure to VOCs.

Suggested Citation

  • Lebogang Phama & Goitsemang Keretetse & Thokozani Mbonane & Phoka Rathebe & Robert Makae & Masilu Daniel Masekameni, 2024. "BTEX Assessment among Informal Charcoal-Burning Food Traders for Cleaner and Sustainable Environment," Sustainability, MDPI, vol. 16(8), pages 1-20, April.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:8:p:3336-:d:1376703
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    References listed on IDEAS

    as
    1. Masilu Daniel Masekameni & Raeesa Moolla & Mary Gulumian & Derk Brouwer, 2018. "Risk Assessment of Benzene, Toluene, Ethyl Benzene, and Xylene Concentrations from the Combustion of Coal in a Controlled Laboratory Environment," IJERPH, MDPI, vol. 16(1), pages 1-18, December.
    2. Elena David & Violeta-Carolina Niculescu, 2021. "Volatile Organic Compounds (VOCs) as Environmental Pollutants: Occurrence and Mitigation Using Nanomaterials," IJERPH, MDPI, vol. 18(24), pages 1-15, December.
    3. Hao Zhang & Xuan Zhang & Yan Wang & Pengchu Bai & Kazuichi Hayakawa & Lulu Zhang & Ning Tang, 2022. "Characteristics and Influencing Factors of Polycyclic Aromatic Hydrocarbons Emitted from Open Burning and Stove Burning of Biomass: A Brief Review," IJERPH, MDPI, vol. 19(7), pages 1-17, March.
    4. Daniela Laura Buruiana & Adrian Sachelarie & Claudiu Butnaru & Viorica Ghisman, 2021. "Important Contributions to Reducing Nitrogen Oxide Emissions from Internal Combustion Engines," IJERPH, MDPI, vol. 18(17), pages 1-13, August.
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