期刊
MARINE POLLUTION BULLETIN
卷 171, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2021.112739
关键词
COVID-19 lockdown; Air pollutants; Plastic waste; Marine ecosystem; Blue economy; India
资金
- National Centre for Sustainable Coastal Management, (NCSCM), Ministry of Environment, Forest and Climate Change (MoEF&CC), Government of India [IR 12003]
- MoEF&CC, India, under the World Bank aided India-ICZM Project [P097985]
The nationwide lockdown in response to COVID-19 pandemic led to a temporary pause in anthropogenic activities, resulting in significant reductions in key urban air pollutants and improvements in water quality in Chennai, a coastal megacity. However, there was an overall increase in biomedical wastes, mainly plastic, during the pandemic period.
Anthropogenic activities experienced a pause due to the nationwide lockdown, imposed to contain the rapid spread of COVID-19 in the third week of March 2020. The impacts of suspension of industrial activities, vehicular transport and other businesses for three months (25 March-30 June) on the environmental settings of Chennai, a coastal megacity was assessed. A significant reduction in the key urban air pollutants [PM2.5 (66.5%), PM10 (39.5%), NO2 (94.1%), CO (29%), O-3 (45.3%)] was recorded as an immediate consequence of the reduced anthropogenic activities. Comparison of water quality of an urban river Adyar, between pre-lockdown and lockdown, showed a substantial drop in the dissolved inorganic N (47%) and suspended particulate matter (41%) during the latter period. During the pandemic, biomedical wastes in India showed an overall surge of 17%, which were predominantly plastic. FTIR-ATR analysis confirmed the polymers such as polypropylene (25.4%) and polyester (15.4%) in the personal protective equipment.
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