Department of Electronics and Communication Engineering, BMS College of Engineering, Bengaluru-560019, India.
Department of Physics, BMS College of Engineering, Bengaluru-560019, India.
Environ Monit Assess. 2022 Jun 27;194(8):532. doi: 10.1007/s10661-022-10235-0.
The mass concentrations of PM were measured at a tropical megacity, Bengaluru, India, for the year 2015. The mean mass concentrations showed large fluctuations on day to day basis with values less than the Indian National Ambient Air Quality Standard (INAAQS) of 60 µg m. The observed annual mean mass concentration of 28 ± 11 µg m is also within the INAAQS value of 40 µg m. The diurnal trend of PM concentration showed bimodal distribution, with the primary peak in the morning and the secondary one during the late evening hours. The timing of the peaks matched with rush traffic hours. Strong seasonality is observed in the diurnal concentration of PM with the highest value during winter (50 ± 22 µg m) and the lowest of (11 ± 5 µg m) in the monsoon. The weekend PM mass concentrations were less than those on the weekdays up to a maximum of 100%. The decrease in PM mass concentration was also observed on the day of the strike when many busses were off the road. Vehicular traffic is suggested as one of the primary contributors of PM in this region. The health risk assessment in this study, points to ischemic heart disease as the primary cause of PM-induced death.
2015 年，在印度热带大都市班加罗尔测量了 PM 的质量浓度。均值质量浓度在每天的基础上波动较大，值低于印度国家环境空气质量标准（INAAQS）的 60μg/m。观察到的年平均质量浓度为 28±11μg/m，也在 INAAQS 值 40μg/m 以内。PM 浓度的日变化趋势呈双峰分布，主要峰值出现在早晨，次要峰值出现在傍晚。峰值出现的时间与交通高峰期相吻合。PM 的日浓度具有很强的季节性，冬季最高（50±22μg/m），季风期最低（11±5μg/m）。周末的 PM 质量浓度低于工作日，最高可达 100%。罢工当天，由于许多公共汽车停运，PM 质量浓度也有所下降。机动车交通被认为是该地区 PM 的主要来源之一。本研究中的健康风险评估指出，缺血性心脏病是 PM 引起死亡的主要原因。
