| Autor: |
Bhupendra Pratap Singh, Manoj Singh, Yashmita Ulman, Urvashi Sharma, Rashmi Pradhan, Jagruti Sahoo, Sibani Padhi, Prakash Chandra, Monika Koul, Prem Narayan Tripathi, Dinesh Kumar, Jamson Masih |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Case Studies in Chemical and Environmental Engineering, Vol 8, Iss , Pp 100417- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2666-0164 |
| DOI: |
10.1016/j.cscee.2023.100417 |
| Popis: |
In December 2019, a novel coronavirus disease (COVID-19) outbreak occurred due to a human respiratory virus that originated in the city of Wuhan, China. During the COVID-19 lockdown, there was a significant improvement in the air quality across the world. We analyzed the data for BTEX over the three years (January to December 2019 to 2021) with pairwise comparison and trend analysis for pre-, during, and post-pandemic periods. This study demonstrates the substantial changes in the concentration of VOCs in the urban area (Punjab) due to the lockdown effects. The results indicate a substantial reduction in the mean TVOCs concentration for all the monitoring stations was found to be 8.89 ± 1.80, 5.59 ± 1.71, and 5.57 ± 1.43 μg/m3 for before, during, and post-pandemic, respectively. The level of TVOCs declined by −43% for all monitoring stations during the lockdown period compared to the previous years. A higher T/B ratio was found in Patiala (2.97 μg/m3) before the pandemic, which may indicate vehicle emission sources. The LCR values for benzene were found to be higher in children than in males and females, which indicated the possible risk. The LCR values for benzene exceeded the prescribed value by CPCB for children. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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