“西电东送”贵州火电项目对区域PM_(10)污染的影响

Study on Regional PM_(10) Impact for Guizhou Thermal Power Plants of the West-East Power Transfer Project

以贵州省为中心的“西电东送”南部通道(20°N^33°N,97°E^118°E)为研究区域,分别对该区域2004(现状年)和2010年(规划年)的PM10污染情况进行模拟和预测.分析了该区域现状年与规划年2个时段的PM10污染空间分布特征,对比了原生和次生PM10的贡献,指出造成该区域PM10污染的主要原因.结果表明:研究区域内PM10污染主要由次生PM10造成,而次生PM10主要是由二氧化硫反应生成的硫酸盐颗粒物.因此,对于贵州火电规划项目而言,减轻区域PM10污染须减排二氧化硫.

The south path （20°N - 33°N, 97vE - 118°E） of the West-East Power Transfer Project with Guizhou Province as the central area was studied, and the pollution levels of PM10 in 2004 （current year） and 2010 （planning year） were respectively simulated and forecasted. The spatial distribution characteristics of PM10pollution during the two periods of current year and planning year were described, and the main causes of PM10 pollution pointed out, based on comparison of the contribution of virgin and secondary particles. The forecasting result suggests that PM10 pollution in Guizhou Province is mainly caused by secondary particles which are mainly sulfates transformed by sulfur dioxide. Therefore, as for thermal power projects under planned in Guizhou Province, it is necessary to start with emission reduction of sulfur dioxide in order to alleviate PM10 pollution.