Determination of some toxic gaseous emissions at Ama Industrial Complex, Enugu, south eastern Nigeria

A study of some gases emitted from three industries at Ama industrial complex, Nigeria, was carried out using Crowcon Gasman, single gas monitors. Results showed that HCN (0.94 plus or minus 0.16 ppm) and CO (3.17 plus or minus 0.89 ppm) emissions from Brewery were significantly (P < 0.05) higher than those of Bottling Company A (0.46 plus or minus 0.12 and 0.65 plus or minus 0.10 ppm, respectively). NH3, SO2 and NO2 emissions were the same. Cl2 emissions from Bottling Company A and Bottling Company B were the same, but each was significantly (P < 0.05) higher than that of Brewery. H2S emission from Bottling Company A (21.24 plus or minus 0.97 ppm) was significantly (P < 0. 05) higher than that from Brewery (17.71 plus or minus 0.94 ppm), which was significantly higher than that of Bottling Company B (12.57 plus or minus 0.32 ppm). Apart from CO and NH3, the concentrations of other gaseous emissions exceeded the Nigerian and United States national ambient air quality standards. Therefore, it is recommended that these companies should determine appropriate control measures to reduce these toxic emissions.