Exposure to air pollutants and heat stress among resource-poor women entrepreneurs in small-scale cassava processing

Parmar Aditya, Tomlins Keith I., Sanni Lateef, Omohimi Celestina, Thomas Funmi, Tran Thierry. 2019. Exposure to air pollutants and heat stress among resource-poor women entrepreneurs in small-scale cassava processing. Environmental Monitoring and Assessment, 191 (11):693, 15 p.

Journal article ; Article de revue à facteur d'impact
[img] Published version - Anglais
Access restricted to CIRAD agents
Use under authorization by the author or CIRAD.

Télécharger (1MB) | Request a copy


Abstract : Exposure to air pollutants and heat stress from traditional cooking fires is the leading cause of mortality and morbidity in low- and middle-income countries globally and have an adverse effect on the environment. According to the World Health Organization, 3.8 million people die annually prematurely from illness related to household air pollution. Families living in poverty are at the highest risk, especially women and children. In this study, exposure to particulate matter (PM2.5 and PM10), carbon monoxide (CO) and nitrogen dioxide (NO2) was measured among resource-poor women cassava processors. The test locations were chosen in the peri-urban settlements of Abeokuta in the Ogun State of Nigeria, where household women entrepreneurs roast garri (granulated cassava) for sale in the local market. The measurements were taken for two types of stoves which are generally existing in the study location. First, a rectangular stove (RS) with two operators and, second, a circular stove (CS) with one operator; both stoves used wood as fuel. The emissions were compared with a modern mechanical liquefied petroleum gas burner-based garri roaster (GS). Hours spent per day in front of garri stoves ranged from 6 to 12 h for both stoves, with a frequency of 1 to 3 days of operation per week. It was found that CS operators were spending significantly more time in producing garri, which is due to the low capacity of the CS. The average PM2.5 concentrations for RS and CS were 381 and 273 μg/m3, respectively, estimated to be 21 and 41 μg/m3 on an annual mean level basis. Similarly, for PM10, the mean concentration levels were 1580 and 594 μg/m3 for RS and CS, respectively. The annual mean levels for PM10 were about 89 μg/m3 for both types of stoves. CO exposure during garri processing was up to five times higher than the recommended concentrations with a 4-h mean of 48 and 50 mg/m3 for RS and CS, respectively. NO2 levels were very low, ~ 0 ppm. This investigative research concluded that wood-fired small-scale garri producers in Nigeria are exposed to very unhealthy levels of PM, CO and thermal stress. The concentration levels of both PM and CO were exceeding the global as well as Nigerian ambient air quality standard regulations. Along with air pollution, thermal stress was a significant issue, which is known to exacerbate the negative effect of air pollution on the human body.

Mots-clés Agrovoc : Polluant, Traitement des aliments, Manioc, Cuisson au four, chaleur, Petite entreprise, Femme, Garri

Mots-clés géographiques Agrovoc : Nigéria

Mots-clés complémentaires : monoxyde de carbone

Mots-clés libres : Particulate matter, Carbon monoxide, Heat stress, Food processing, Firewood stoves

Classification Agris : P02 - Pollution
J10 - Handling, transport, storage and protection of agricultural products

Champ stratégique Cirad : CTS 3 (2019-) - Systèmes alimentaires

Auteurs et affiliations

  • Parmar Aditya, NRI (GBR) - auteur correspondant
  • Tomlins Keith I., NRI (GBR)
  • Sanni Lateef, FUNAAB (NGA)
  • Omohimi Celestina, FUNAAB (NGA)
  • Thomas Funmi, FUNAAB (NGA)
  • Tran Thierry, CIRAD-PERSYST-UMR Qualisud (COL) ORCID: 0000-0002-9557-3340

Source : Cirad-Agritrop (

View Item (staff only) View Item (staff only)

[ Page générée et mise en cache le 2021-05-17 ]