Wu C Y, Pratt G C
Minnesota Pollution Control Agency, St. Paul 55155, USA.
J Air Waste Manag Assoc. 2001 Aug;51(8):1129-41. doi: 10.1080/10473289.2001.10464341.
Air toxics emission inventories play an important role in air quality regulatory activities. Recently, Minnesota Pollution Control Agency (MPCA) staff compiled a comprehensive air toxics emission inventory for 1996. While acquiring data on the mass of emissions is a necessary first step, equally important is developing information on the potential toxicity of the emitted pollutants. To account for the toxicity of the pollutants in the emission inventory, inhalation health benchmarks for acute effects, chronic effects, and cancer were used to weight the mass of emissions. The 1996 Minnesota emissions inventory results were ranked by mass of emissions and by an index comprised of emissions divided by health benchmarks. The results show that six of eight pollutants ranked highest by toxicity were also the pollutants of concern indicated in environmental monitoring data and modeling data. Monitoring data and modeling results did not show high impacts of the other two pollutants that were identified by the toxicity-based emission ranking method. The biggest limitation in this method is the lack of health benchmark values for many pollutants. Despite uncertainties and limited information, this analysis provides useful information for further targeting pollutants and source categories for control.
空气有毒物质排放清单在空气质量监管活动中发挥着重要作用。最近，明尼苏达州污染控制局（MPCA）的工作人员编制了一份1996年的综合空气有毒物质排放清单。虽然获取排放物质量数据是必要的第一步，但同样重要的是要掌握有关排放污染物潜在毒性的信息。为了在排放清单中考虑污染物的毒性，急性效应、慢性效应和癌症的吸入健康基准被用来对排放物质量进行加权。1996年明尼苏达州的排放清单结果按排放物质量以及由排放物除以健康基准组成的指数进行排名。结果表明，毒性排名最高的八种污染物中有六种也是环境监测数据和模型数据中指出的关注污染物。监测数据和模型结果并未显示基于毒性的排放排名方法所识别的其他两种污染物有很大影响。该方法最大的局限性在于许多污染物缺乏健康基准值。尽管存在不确定性和信息有限的情况，但该分析为进一步确定控制污染物和污染源类别提供了有用信息。
