School Of Environment And Earth Sciences

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Author: search.filters.author.Pandey, PuneetaSubject: search.filters.subject.COVID-19

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    Temporal Variation of Water Quality Parameters during COVID-19: A Case Study of River Yamuna
    (2023-07-20T00:00:00) Singh, Bhupendra Pratap; Pandey, Puneeta; Koul, Monika; Bhatia, Bela; Singh, Amit Kumar; Mehra, Kriti; Chowdhary, Khyati; Kumar, Ranjeet; Goel, Vanshika
    Abstract: The novel coronavirus (COVID-19) originated in Wuhan city of China in late December 2019 and affected the (atmosphere and hydrosphere) and also impacted economic activities due to the lockdown. Several studies have reported the impact of the COVID-19 pandemic on significant changes in the air quality index, but only a few studies have reported the relationship between water quality parameters and COVID-19. The findings of the current study revealed that the mean values of pH in the Yamuna river were reported to be 7.77 � 0.31, 7.55 � 0.40, and 7.31 � 0.44 for pre-, during, and post-pandemic periods. The changes in the pH values indicated that Yamuna water quality became less alkaline due to restricted industrial activities along the river during the lockdown period. Further, the mean values of COD were observed to be 60.57 � 16.79, 62.99 � 23.17, and 129.06 � 36.96; the BOD values were 18.20 � 8.42, 20.16 � 5.22, and 33.35 � 10.35, and DO values were 3.30 � 1.15, 3.20 � 0.96, and 3.49 � 1.56 respectively for pre-, during, and post-pandemic periods. The results of these parameters indicated that agriculture, including local source discharges, was a major factor affecting water quality parameters during the pandemic period. According to the study, there is a significant positive association between the BOD and COD with values 0.99, 0.98, and 0.94, respectively, whereas a strong negative correlation was calculated between DO, COD, BOD for pre-, during, and post-pandemic periods. This study would be enlightening among the scientists, researchers, and government to address the water issues along with policy formulation. � 2023, Pleiades Publishing, Ltd.
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    Substantial changes in Gaseous pollutants and health effects during COVID-19 in Delhi, India
    (PeerJ Inc., 2023-01-09T00:00:00) Singh, Bhupendra; Pandey, Puneeta; Wabaidur, Saikh Mohammad; Avtar, Ram; Kumar, Pramod; Rahman, Shakilur
    Background. Coronavirus disease has affected the entire population worldwide in terms of physical and environmental consequences. Therefore, the current study demonstrates the changes in the concentration of gaseous pollutants and their health effects during the COVID-19 pandemic in Delhi, the national capital city of India. Methodology. In the present study, secondary data on gaseous pollutants such as nitrogen dioxide (NO2), carbon monoxide (CO), sulfur dioxide (SO2), ammonia (NH3), and ozone (O3) were collected from the Central Pollution Control Board (CPCB) on a daily basis. Data were collected from January 1, 2020, to September 30, 2020, to determine the relative changes (%) in gaseous pollutants for pre-lockdown, lockdown, and unlockdown stages of COVID-19. Results. The current findings for gaseous pollutants reveal that concentration declined in the range of 51%�83% (NO), 40%�69% (NOx), 31%�60% (NO2), and 25%�40% (NH3) during the lockdown compared to pre-lockdown period, respectively. The drastic decrease in gaseous pollutants was observed due to restricted measures during lockdown periods. The level of ozone was observed to be higher during the lockdown periods as compared to the pre-lockdown period. These gaseous pollutants are linked between the health risk assessment and hazard identification for non-carcinogenic. However, in infants (0�1 yr), Health Quotient (HQ) for daily and annual groups was found to be higher than the rest of the exposed group (toddlers, children, and adults) in all the periods. Conclusion. The air quality values for pre-lockdown were calculated to be ��poor category to ��very poor�� category in all zones of Delhi, whereas, during the lockdown period, the air quality levels for all zones were calculated as ��satisfactory,�� except for Northeast Delhi, which displayed the ��moderate�� category. The computed HQ for daily chronic exposure for each pollutant across the child and adult groups was more than 1 (HQ > 1), which indicated a high probability to induce adverse health outcomes. � Copyright 2023 Singh et al.