彩钢行业VOCs排放特征及O3和SOA生成潜势

采用固相吸附-热脱附-气质联用技术对浙江某市典型彩钢企业生产车间与废气处理装置进行了VOCs定量分析，获得了该行业的特征VOCs成分谱，并利用最大反应增量法（MIR）和气溶胶转化系数法（FAC）估算了彩钢行业各组分VOCs对臭氧（O₃）及二次有机气溶胶（SOA）的生成潜势.结果显示：该市彩钢行业VOCs成分复杂，酯类和醇类占比在50%以上；车间VOCs浓度水平受温度影响大，夏季浓度约为冬季浓度的1.6~4.2倍；通过对O3和SOA的计算可知，芳烃类、醇类物质对O₃生成潜势贡献率分别为70.0%和28.05%，而SOA生成潜势完全由芳烃类物质提供.

VOCs emission characteristics of color steel industry and formation potential of ozone and secondary organic aerosol

To obtain the characteristic volatile organic compounds (VOCs) spectrum of the color steel industry, the quantitative analysis of VOCs in the production workshop and exhaust gas treatment equipment of a typical color steel enterprise of Zhejiang Province was carried out by sorbent adsorption-thermal desorption-gas chromatography mass spectrometry method. And the maximum increment reactivity (MIR) and fractional aerosol coefficients (FAC) methods were used to estimate the ozone (O₃) and secondary organic aerosol (SOA) formation potential of VOCs. The composition of the waste gas in the color steel industry was complex, and the proportion of esters and alcohols was more than 50%. The concentration level of VOCs in workshop tended to be affected greatly by temperature, and in summer it was almost 1.6~4.2 times of that in winter. The ozone formation potential contribution rate of the aromatic hydrocarbons and alcohols was 70.0% and 28.05%, respectively, while the SOA formation potential was totally contributed by aromatics.