Environmental Impact on Ambient Air Quality by Capacity Loading Extension for Power Station－A Case Study on B Coal-Fired Power Station

• Main Authors: Chia-Chi Chang, 張嘉淇
• Other Authors: 章裕民
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/t3bsdh

碩士 === 國立臺北科技大學 === 環境工程與管理研究所 === 99 === To assess environment risk, the ISCST3 model was used to evaluate impact of air quality on county A for the capacity loading extension of coal-fired power station B in this study. Were selscted as representative sites, two sensitive receptors (located on the downwind pollution) and two reference points in county A. Because of prevailing wind direction the result that the maximum daily average and annual average ground concentration of PM10 are 3.746μg/m3 and 0.769μg/m3. There are located in the southwest of power station by atmospheric dispersion. The maximum annual average increment concentration of the sensitive point 1 is 0.141μg/m3 and the sensitive point 2 is 0.146μg/m3. The estimated concentration each month of the sensitive receptors and reference points are not different greatly. Both of them are in compliance with air quality standards and permissible incremental limits of the air pollution control district so there is less impact for the overall air quality on county A. In the future control measures, monitoring air quality on county A continually can make sure resident health risk and the quality of life on county A. Moreover, it is assumed that there are not heavy metals in the air on the ground in this study. So Pb Cd and Hg in the maximum ground concentration of PM10 is the maximum ground concentration of Pb Cd and Hg in the air on the ground. The result shows that the maximum ground concentration of Pb Cd and Hg in sensitive receptors and reference points are not more than background concentration and hence there is no obviously environmental risk for county A. In this study, according to human health risk assessment methods by the U.S. EPA determined to evaluate Pb. It can be estimated that the lifetime cancer risk values of the male and female adult were 1.588 × 10-11 and 1.671 × 10-11. Both of them are less than 1.0 × 10-6 (acceptable lifetime cancer risk value is set to 1.0 × 10-6). So it can show that exposure to the kinds of conditions resulting in the possibility of cancer in life of male and female adult is almost impossible and lower risk. It is less harmful for human health.