Peter Anju Elizbath, Nagendra S M Shiva
Department of Civil Engineering, Indian Institute of Technology, Chennai, India, 600 036.
Environ Monit Assess. 2021 Apr 18;193(5):281. doi: 10.1007/s10661-021-09052-8.
The present study explored the effect of local meteorology on the dispersion of PM from a 30-year open municipal solid waste (MSW) dumpsite in Chennai, India. The spatial monitoring was conducted in and around the dumpsite to understand the impacts of dumpsite activities on the nearby residential area. Results showed that dumpsite activities are responsible for deteriorating local air quality. The 24-h average PM concentrations were 50, 43.7, and 34 µg m during stagnation, recirculation, and ventilation events, respectively. Spearman's correlation showed an inverse relationship between PM and temperature; wind speed indicated dispersion of fine aerosols. The observed inverse relationship between PM and relative humidity indicated the hygroscopic growth of fine aerosols in the study area. We used AERMOD to simulate the dispersion of 1-h, 8-h, and 24-h PM emissions from open waste burning in the dumpsite. The 1-h, 8-h, and 24-h simulated results showed the maximum concentration of 247, 136, and 53.4 µg m in the dumpsite, and concentration levels ranged between 50-60, 30-50, and 10-20 µg m were observed in the nearby residential area. The AERMOD predictions indicated that open waste burning could be a significant contributor to high PM concentration in an adjacent residential area of the dumpsite.
本研究探讨了印度钦奈一个有30年历史的开放式城市固体废弃物（MSW）垃圾场当地气象条件对颗粒物（PM）扩散的影响。在垃圾场及其周边进行了空间监测，以了解垃圾场活动对附近居民区的影响。结果表明，垃圾场活动是当地空气质量恶化的原因。在停滞、回流和通风事件期间，24小时平均PM浓度分别为50、43.7和34微克/立方米。斯皮尔曼相关性分析表明PM与温度呈负相关；风速表明细颗粒物的扩散情况。观测到的PM与相对湿度之间的负相关关系表明研究区域内细颗粒物存在吸湿增长现象。我们使用AERMOD模型模拟了垃圾场露天垃圾焚烧产生的1小时、8小时和24小时PM排放的扩散情况。1小时、8小时和24小时的模拟结果显示，垃圾场内的最大浓度分别为247、136和53.4微克/立方米，在附近居民区观测到的浓度水平分别在50 - 60、30 - 50和10 - 20微克/立方米之间。AERMOD模型预测表明，露天垃圾焚烧可能是垃圾场附近居民区PM高浓度的一个重要成因。
