| Title: | Emissions of non-methane volatile organic compounds from a landfill site in a major city of India: impact on local air quality |
| Author(s): | Dave PN; Sahu LK; Tripathi N; Bajaj S; Yadav R; Patel K; |
| Address: | "Sardar Patel University, Vallabh Vidyanagar, 388 120, India. Physical Research Laboratory, Ahmedabad, 380009, India. Indian Institute of Technology, Gandhinagar Palaj, Gandhinagar, 382355, India. Amity University, Noida, 201313, India. Indian Institute of Tropical Meteorology (IITM), Pashan, Pune, 411008, India" |
| DOI: | 10.1016/j.heliyon.2020.e04537 |
| ISSN/ISBN: | 2405-8440 (Print) 2405-8440 (Electronic) 2405-8440 (Linking) |
| Abstract: | "Emissions from landfills are a significant source of non-methane volatile organic compounds (NMVOCs) in urban environments. NMVOCs play an important role in atmospheric chemistry, and elevated concentrations of some compounds are responsible for air quality deterioration. This study is based on the measurements of a suite of 20 C(2)-C(8) NMVOCs at 21 upwind and downwind sites of the largest landfill in western India. Ethane, ethylene and aromatics were the dominant compounds; the concentrations of BTEX in the downwind regions were up to three times higher than their concentrations at upwind sites. The emission ratios of BTEX and other NMVOCs were different from those for residential, commercial, and industrial sources characterizing the emissions from burning and decomposition of organic material. The slope of DeltaToluene/DeltaBenzene of 0.64 is about three times higher than that determined at the main road junctions of the city. Ranking by Prop-Equiv, the top NMVOCs were isoprene, cis-2-Butene, m + p-xylenes, propylene, ethylene and trans-2-Butene account for 72-75% of the total Prop-Equiv concentrations. Alkenes played the dominant role in ozone formation, followed by aromatic and alkane groups. In addition to landfill emissions, contributions from traffic-related emissions to ambient concentrations of aromatic VOCs were also significant at some sites. Although the experiment was not designed to characterize the emissions from a specific source, the analysis suggests the substantial contributions from both decomposition and burning of landfill materials. The main difficulty in characterizing VOC emissions from landfills is the spatial and temporal variability of emissions from a large area" |
| Keywords: | Air quality Environmental chemistry Environmental hazard Environmental impact assessment Environmental pollution Environmental science Fossil fuel India Landfill NMVOCs Pollution Td-gc-fid Urban; |
| Notes: | "PubMed-not-MEDLINEDave, Pragnesh N Sahu, Lokesh Kumar Tripathi, Nidhi Bajaj, Samiksha Yadav, Ravi Patel, Kashyap eng England 2020/08/08 Heliyon. 2020 Jul 27; 6(7):e04537. doi: 10.1016/j.heliyon.2020.e04537. eCollection 2020 Jul" |
