ASSESSMENT OF AROMATIC VOLATILE ORGANIC COMPOUNDS EMITTED FROM DIESEL ENGINES USED IN LOCAL FOOD PROCESSING MARKET, AGO, ISALE KOTO AREA, ILORIN, NIGERIA.
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Date
2022-03-30
Journal Title
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Faculty of Engineering, Lagos State University, Ojo. Nigeria
Abstract
Diesel engines are important emission sources of aromatic Volatile Organic Compounds species including
Benzene, Toluene, Ethylbenzene and o, m, p Xylene (BTEX). In this study,the impact of aromatic VOCs emission
from diesel engines operation was investigated in a local food market.
The aim of this study was to assess the contribution of diesel engines to VOCs emission in a local food processing
market, Ago, Ilorin, Nigeria, on workers, patronizers and inhabitants. Fabricated passive samplers were deployed
at ten locations for both indoor and outdoor within the market at above 1.5m human breathing height containing
30gramms of activated charcoal each as adsorbent. The samplers were exposed for one month, the analytes were
recovered by desorption process with carbondisulphide CS2 and subjected to Gas Chromatography fitted with
flame ionization detector.
The VOCs concentrations found are ranged from 0.0021-0.0026 mg/m3 for Benzene; 0.0017-0.0023mg/m3 for
Toluene; 0.0009-0.0017 mg/m3 for Ethylbenzene;0.00101- 0.00192 mg/m3 for Xylene for outdoor sampling while
for indoor sampling the ranged are 0.0024-0.0031 mg/m3 for Benzene; 0.0018-0.0023 mg/m3 for Toluene; 0.0013-
0.0023 mg/m3 for Ethylbenzene;0.00093- 0.00222 mg/m3 for Xylene. The averaged BTEX concentration at the
indoor was higher than outdoor environment. The averaged concentrations of BTEX at all locations were lower
than the limit of air quality standards. The mean lifetime cancer risk for workers, patronizers and inhabitants
exposed to benzene and ethylbenzene for 25 years were estimated at 1.33x10-7 and 1.16x10-7 for indoor and
outdoor respectively. Non cancer risks Hazard Index were estimated to be 1.11x10-5 and 8.74x10-6 for both indoor
and outdoor respectively. Both cancer risk and non-cancer risk assessment are within acceptable limit.
This study established that significant aromatic VOCs are emitted from diesel engine exhausts and recommends
hydrogen powered engines in place of diesel engines as to eliminate VOC emissions in local food processing
industries.
Description
The processing and operation of food processing engines in a local food marketwith diesel engines at Ago, Ilorin,
Nigeria is consociated with the emission of various pollutants such as nitrogen oxides (NOx), carbon monoxide
(CO), burned and unburned hydrocarbon (HC), and particulate matter (PM), heavy metals and sounds into the
atmosphere.The burned and unburned hydrocarbon from diesel engine emission contains significant amount of
volatile organic compound (VOCs) that causes of severe environmental problems and affecting human health
Keywords
Citation
Muhibbudin E.I., Adepoju M. O.,Sanni M., Okoroji V.E. & Bassey D. A. (2022): Assessment of Aromatic Volatile Organic Compounds emitted from diesel engines used in local food processing market, Ago, Isale Koto Area, Ilorin, Nigeria. Engineering & Technology Research Journal. 7(1); 8-17