Ambient Air Quality Monitoring in Metropolitan City of Lagos, Nigeria

Njoku, Kelechi L.; Rumide, Tosin John; Akinola, M. O.; Adesuyi, Adeola Alex; Jolaoso, Anuoluwapo Omosileola

doi:10.4314/jasem.v20i1.21

Cited by 41 publications

(45 citation statements)

References 11 publications

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“…It irritates the nose, throat and airways causing coughing, wheezing, or a tight feeling around the chest. It is usually more severe in the individuals suffering from asthma or similar conditions (Njoku et al, 2016). The long-term exposure to even low levels of sulphur dioxide can cause lung function to deteriorate, aggravate the existing heart disease and increase complications for people with asthma.…”

Section: Fig 3 Mean Noise Level (Dba) Recorded Indoors Of the Univementioning

confidence: 99%

Indoor Air Quality and Microbial Assessment of a Nigerian University Campus in Lagos, Nigeria

Shittu

Njoku

Adesuyi

2019

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Good indoor air quality improves productivity at the workplace. On the other hand, poor indoor air quality could lead to losses in productivity as a result of comfort problems, ill health and sickness-absenteeism. The aim of the study was to assess indoor air quality in various rooms of university buildings covering the offices, lecture theatre, laboratory or workshops and public restroom across eight faculties in a conventional university. Investigations were conducted at twenty-nine indoor locations in the main campus of University of Lagos. Noise level, PM2.5, PM10, relative humidity and temperature, CO, SO2, NOx, and the microbial quality (fungal and bacterial) were all determined. The microbial quality was determined using the sedimentation method (open petri dishes) containing different culture media for sample collection. Noise level ranged from 61.60 to 84.10 dBA. The noise level is quite high in almost all sampling points especially in the workshops, yet there was no significant difference (P>0.05) across all the indoor sampling points and the WHO limit.SO2 were mostly absence, however, the highest value of 0.4 ppm was recorded which was higher than recommended limit of 0.1 ppm.PM2.5 ranged between 4.0–25.0 µg/m3 and PM10 were between 8.0–47.0 µg/m3. Though, there was high variation in PM2.5 and PM10 across all the indoor sampling points, there were no significant difference (P>0.05). They were below the maximum limit of 150 µg/m3.The total fungi load ranged from 10.4 to 963 CFU/m3. There was generally higher number of fungi in the restroom than all the other indoor environments and they were significant in Faculty of social sciences. Fungi isolates include Aspergillus spp. (86.2%), unidentified mold (13.77%) and Sporothrix schenckii (0.03%). Total bacteria load ranged from 96.3 to 689 CFU/m3. The lowest load of bacteria (9.63 x 101 CFU/m3) was recorded in the dean’s office at the faculty of environmental science. The rest rooms have higher bacterial load (6.89 x 102 CFU/m3), which was higher than the recommended maximum limit of 500 CFU/m3. Identification from the colonies showed that about 55% were gram negative and 45% were gram negative cells. Morphological studies showed that cocci were also more predominant over the bacillary shape bacteria (55% versus 45%).

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Section: Fig 3 Mean Noise Level (Dba) Recorded Indoors Of the Univementioning

confidence: 99%

Indoor Air Quality and Microbial Assessment of a Nigerian University Campus in Lagos, Nigeria

Shittu

Njoku

Adesuyi

2019

ebzr

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“…Industrial activities that contaminate air are distributed globally [4,5]. In Port Harcourt, one of the cities in Nigeria, only few studies have been conducted on the quality of air [6][7][8][9]. The few previous studies however presented air data and compared same with standard limits.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Particulate Matter-Based Air Quality Index in Port Harcourt, Nigeria

Akinfolarin¹,

Boisa²,

Obunwo³

2017

J Environ Anal Chem

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Due to the desire of nations to enhance their economic status, industrialization is vigorously pursued. Industrialization is historically associated with environmental degradation. In developing countries, due to lack of environmental awareness, the level of industrialization is not commensurate with environmental studies and monitoring. This study was designed to assess the status of particulate matter at three emerging industrial sites in Port Harcourt. To achieve this, Aerocet 531 monitor was used. To be able to communicate properly with the general public, data obtained were expressed in terms of Air Quality Index (AQI). The results showed that industrial sites had higher concentrations compared to the control for both PM 2.5 and PM 10 . Seasonal variation of PM 2.5 and PM 10 were observed with the dry season indicating concentrations higher than the local acceptable limits of 150 µg/m 3 and 230 µg/m 3 . The AQI of the three emerging industrial sites indicated a category for 'good' to 'moderate' for wet season while for dry season, they varied from 'very unhealthy' to 'hazardous' in all the sampling areas. This poses a great threat to health and environment of the inhabitants.

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“…This low concentration of CO is due to the fact that CO is naturally oxidized by oxygen to carbon dioxide in the earth atmosphere. Carbon monoxide levels in urban and semi-urban areas closely reflect traffic density (in combination with weather conditions) and also open incineration of wastes (Njoku, Rumide, Akinola, Adesuyi, & Jolaoso, 2016). In this study the two highest CO concentrations were recorded at two major traffic intersections areas (Asaba and Okpanam), these may be due to the high presence of vehicular activities and road construction along Federal The data in Figure 6 revealed that values for VOC concentrations ranges from 13.00 to 20.00 ppm which falls below the maximum WHO standard (30.3 ppm) in fresh air which is safe for healthy adults for an 8-hour work day (WHO, 2009).…”

Section: Figure 2 Mean Variation Of No 2 Pollutant Across Periods Atmentioning

confidence: 99%

Prevalence of Pollutant Gases and the Occurrence of Associated Diseases in Asaba Metropolis, Delta State, Nigeria

Atubi¹,

Osoyibo²

2020

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The study examined the prevalence of pollutant gases and occurrence of associated diseases in Asaba Metropolis, Delta State, Nigeria. The study adopted a retrospective cohort and survey research design. The cohort study analyzed the reported air pollution medical cases in Federal Medical Center in Asaba such as respiratory diseases, Asthma, Pneumonia, Tuberculosis, Meningitis and Measles. The survey involved measurement of air pollutant such as NO2, SO2, H2S, CO and VOC to compare with the National Ambient Air Quality Standard (NAAQS) data and the World Health Organization Air Quality Guideline (WHOAQG) in order to ascertain the level of air pollution. As part of the study, a total of two hundred (200) copies of questionnaires were administered in two major communities representing the two LGAs that make up Asaba Metropolis serving as study sites (Asaba and Okpanam). The data were analyzed using simple percentage and frequency distribution method, averaging model and standard deviation, measure of central tendency/dispersion (Mean±SD), Pearson Product Moment Correlation Coefficient (PPMC) and analysis of variance (ANOVA). The results of the study revealed that the highest recorded gas emitted in the area include Volatile and Organic Compounds (VOCs) with 96.4%, Carbon monoxide (CO) was 0.8%, Hydrogen sulfide (H2S) was 0.4% while Sulfur dioxide (SO2) and Nitrogen oxide (NO2) were 1.2% respectively. NO2 exceeded the WHO and NAQS thresholds. The most prevalent air pollution related diseases reported were respiratory diseases which were above 50% of the yearly prevalence and Tuberculosis which was over 30% each year followed closely by Asthma and Pneumonia. The least diseases in terms of prevalence in the study area were Meningitis and Measles. Based on the findings, it was recommended that routine measurements should be made on a continuous basis to ascertain the volume of gaseous pollutants in the urban and rural environments of the study area.

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Ambient Air Quality Monitoring in Metropolitan City of Lagos, Nigeria

Cited by 41 publications

References 11 publications

Indoor Air Quality and Microbial Assessment of a Nigerian University Campus in Lagos, Nigeria

Indoor Air Quality and Microbial Assessment of a Nigerian University Campus in Lagos, Nigeria

Assessment of Particulate Matter-Based Air Quality Index in Port Harcourt, Nigeria

Prevalence of Pollutant Gases and the Occurrence of Associated Diseases in Asaba Metropolis, Delta State, Nigeria

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