Sinha Sukesh Narayan, Shivgotra V K
National Institute of Occupational Health (ICMR), Meghaninager, Ahmedabad--380 016, India.
J Environ Biol. 2012 Jul;33(4):729-34.
Fuel adulteration increases the emission of total hydrocarbons, carbon monoxide, nitrogen oxides and respirable particulate matter, and thus adds to air pollution. The study examined the effects of mixing of different percentage of kerosene with petrol on the motorized rickshaw exhausts in terms of volatile organic compounds (benzene, toluene, xylene and ethyl benzene) and total suspended particulate matter (SPM). The personal sampler was used for sampling, and gas chromatography-mass spectrometry for quantification of compounds. Concentration of volatile organic compounds significantly decreased (p < 0.001) along with the increase in fraction of kerosene in petrol. The level of benzene in exhausts while, using petrol (100%) was significantly higher (p < 0.001) than that of three combinations used in this study (75% petrol + 25% kerosene, 50% petrol + 50% kerosene and 25% petrol + 75% kerosene). Similar trend was observed for toluene, xylene and ethyl benzene also. The mean concentration of benzene, toluene, xylene and ethyl benzene were 31.34,160.93, 10.07 and 5.58 microg m(-3) in pure petrol, while 12.30, 51.41,4.89 and 3.16 microg m(-3) for fuel combination 75% petrol + 25% kerosene. The observed levels of benzene, toluene, xylene and ethyl benzene were 9.12, 41.04, 4.33 and 2.91 microg m(-3) for fuel mixture having 50% petrol with 50% kerosene and levels were 8.36, 20.05, 3.82 and 2.95 microg m(-3) were for 25% petrol with 75% kerosene fuel combination. The levels of suspended particulate matter (SPM) increased along with the increase in fraction of kerosene in petrol. The data generated is useful to understand the common volatile organic compounds trend with the increasing fraction of kerosene in petrol.
燃料掺假会增加总碳氢化合物、一氧化碳、氮氧化物和可吸入颗粒物的排放，从而加剧空气污染。该研究考察了不同比例煤油与汽油混合对机动三轮车尾气中挥发性有机化合物（苯、甲苯、二甲苯和乙苯）以及总悬浮颗粒物（SPM）的影响。使用个人采样器进行采样，并用气相色谱 - 质谱联用仪对化合物进行定量分析。随着汽油中煤油比例的增加，挥发性有机化合物的浓度显著降低（p < 0.001）。使用纯汽油（100%）时尾气中的苯含量显著高于本研究中使用的三种混合比例（75%汽油 + 25%煤油、50%汽油 + 50%煤油和25%汽油 + 75%煤油）（p < 0.001）。甲苯、二甲苯和乙苯也呈现类似趋势。纯汽油中苯、甲苯、二甲苯和乙苯的平均浓度分别为31.34、160.93、10.07和5.58微克/立方米，而对于75%汽油 + 25%煤油的燃料混合物，其浓度分别为12.30、51.41、4.89和3.16微克/立方米。对于50%汽油与50%煤油的燃料混合物，观察到的苯、甲苯、二甲苯和乙苯浓度分别为9.12、41.04、4.33和2.91微克/立方米，而对于25%汽油与75%煤油的燃料混合物，浓度分别为8.36、20.05、3.82和2.95微克/立方米。总悬浮颗粒物（SPM）的含量随着汽油中煤油比例的增加而增加。所生成的数据有助于了解随着汽油中煤油比例增加常见挥发性有机化合物的变化趋势。
