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Raja Vijayakumar Dutta Sayantani Murugesan Pramila Moses J. A. Anandharamakrishnan C. 《Environmental Chemistry Letters》2023,21(2):839-864
Environmental Chemistry Letters - Conventional treatments of food waste such as incineration, landfilling, and composting require large land areas and induce contamination in air, soil,... 相似文献
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Praveen Tudu Tanushree Gaine Shouvik Mahanty Sayantani Mitra Subarna Bhattacharyya Punarbasu Chaudhuri 《环境质量管理》2023,32(3):79-96
Reduction in air pollution level was prime observation during COVID-19 lockdown globally. Here, the study was conducted to assess the impact of lockdown on the elemental profile of PM10 in ambient aerosol to quantify the elemental variation. To quantify the variation, phase-wise sampling of air pollutants was carried out using the gravimetric method for PM10, while NO2 and SO2 were estimated through the chemiluminescence and fluorescent spectrometric method respectively. The elemental constituents of PM10 were carried out using an Inductively Coupled Plasma Optical Emission Spectrometer and their source apportionment was carried out using the Positive Matrix Factorization model. The results showed that PM10, NO2 and SO2 reduced by 86.97%, 83.38%, and 88.60% respectively during the lockdown sampling phase. The highest mean elemental concentration reduction was found in Mn (97.47%) during the lockdown. The inter-correlation among the pollutants exhibited a significant association indicating that they originate from the same source. The metals like Mn and Cu were found at a higher concentration during the lockdown phase corresponding to vehicular emissions. The comparative analysis of the elemental profile of PM10 concluded that the lockdown effectuated in reduction of the majority of elements present in an aerosol enveloping metropolitan like Kolkata. 相似文献
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