Emission of Combustible Gases at Traffic and Practising Waste Dumpsite in Freetown, Sierra Leone: A Pilot Study

Abstract

See, stats, and : https : / / www. researchgate. net / publication / 311472732 Emission Practising , Sierra Leone: A Article DOI : 10 . 4236 / acs . 2017 . 71001 CITATIONS 0 READS 60 5 , including : Eldred Njala 16 SEE Daniel Njala 2 SEE All . The . All - text and , letting . Abstract An assessment of the emission of combustible gases in developing countries requires reliable analytical realtime monitors that can rapidly screen them with minimal han - dling . Considering the expensive nature of monitoring environmental pollutants , chemical sensors are expected to play a pivotal role in measuring and recording en - vironmental data . The Drager X am 5000 was used to report emission levels of com - bustible gases in this study , namely ; nitrogen dioxide (NO 2) , sulphur dioxide (SO 2) and carbon monoxide (CO) at traffic and practising waste dumpsite in Freetown , the main city of Sierra Leone . Hourly average values for the three pollutants were rec - orded in the morning , afternoon and evening periods , respectively . The range of values were 18 - 76 ppb for NO 2 , 211 - 506 ppb for SO 2 and 11 - 14 ppm for CO at traffic site ; and 6 - 16 ppb for NO 2 , 118 - 276 ppb for SO 2 and 8 - 15 ppm for CO at the dumpsite , respectively . There were significantly high hourly variations for NO 2 and SO 2 at the traffic site and for CO and SO 2 at the dumpsite . Evidence of peak values showed emission levels that were considered dangerous for human expo - sure . This pilot study revealed that combustible gases released in certain areas of the capital city are a concern for both public health officials and environmental advocates .