利用罐采样/GC-MS法测废气处理装置处理效果

Measuring the treatment effect of the waste gas treatment device by using gas chromatography-mass spectrometry(GC-MS)

为探究废气处理装置对挥发性有机物(VOCs)的处理效果,利用气相色谱-质谱法对在处理装置前后两端用苏玛罐采集到的VOCs样品进行定性定量分析,尝试建立一种新型的检测方法。结果显示:废气中共检测得到VOCs共50种,其中烷烃4种、芳香烃9种、含氧挥发性有机物6种、卤代烷烃17种、卤代烯烃9种以及卤代芳烃5种。降解前质量浓度分别为23.16、207.87、1435.54、1409.28、14.58以及17.11μg/m^(3),降解后质量浓度分别为15.24、200.39、459.19、371.86、7.43以及7.77μg/m^(3)。降解效率分别为34.22%、3.60%、68.01%、73.61%、49.07%、和54.60%。同时监测得到的VOCs特征组分分别有丙酮、氯甲烷、二氯甲烷、4-乙基甲苯、氯乙烷以及甲苯6种,降解前后质量浓度之和占总VOCs的百分比分别有93.37%和84.45%,需对这几种VOCs进行重点关注。

In order to explore the treatment effect of volatile organic compounds(VOCs)in the waste gas treatment device,the VOCs samples collected by Suma tank at both ends of the treatment device were qualitatively and quantitatively analyzed by gas chromatography-mass spectrometry,and a new detection method was established.The results showed that a total of 50 kinds of VOCs were detected in the exhaust gas,including 4 kinds of alkanes,9 kinds of aromatic hydrocarbons,6 kinds of oxygenic volatile organic compounds,17 kinds of halogenated alkanes,9 kinds of halogenated olefin and 5 kinds of halogenated aromatic hydrocarbons.The mass concentrations before degradation were 23.16,207.87,1435.54,1409.28,14.58 and 17.11μg/m^(3) respectively.The mass concentrations after degradation were 15.24,200.39,459.19,371.86,7.43 and 7.77μg/m^(3) respectively.The degradation efficiencies were 34.22%,3.60%,68.01%,73.61%,49.07%,and 54.60%respectively.At the same time,there are 6 VOCs characteristic components obtained by monitoring,which are acetone,chloromethane,dichloromethane,4-ethyltoluene,chloroethane and toluene respectively.The mass concentration before and after degradation accounts for 93.37%and 84.45%of the total VOCs,respectively.Therefore,it is necessary to pay attention to these VOCs.