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001-es BibID:	BIBFORM121071
035-os BibID:	(WoS)000534219700064 (Scopus)85081536147
Első szerző:	Irfan, Muhammad (PhD Environmental Sciences)
Cím:	An unintended challenge of microplastic pollution in the urban surface water system of Lahore, Pakistan / Muhammad Irfan, Abdul Qadir, Mehvish Mumtaz, Sajid Rashid Ahmad
Dátum:	2020
ISSN:	0944-1344 1614-7499
Megjegyzések:	Plastics are widely considered to be a major threat particularly in the urban areas owing to extensive use of plastic products. The current study is the first investigation to highlight the microplastics (MPs) pollution from the freshwater (Ravi River) located in the predominant urban center, i.e., Lahore, Pakistan. The concentration profile was quantified from surface water (n=19) and sediments (n=19) collected from different drains and canals of predominant freshwater resources in Lahore, Pakistan. The highest content of MPs was observed in the sullage carrier with mean concentration of 16,150 ? 80 MPs/m3 and 40,536 ? 202 MPs/m2 in the water and sediments respectively. The lowest level was detected in the link canals with mean concentration of 190 ? 141 MPs/m3 in the water and 683 ? 479 MPs/m2 in the sediments. The proportion of large size MPs (300 ?m?5 mm) was maximum in the upstream section of Ravi river, whereas fine size MPs (50?150 ?m) were dominant in the downstream section. In terms of shapes, the fragments were predominant with a relative abundance of 56.1% and 83.1% followed by fibers with a relative abundance of 38.6% and 11.8%in the water and sediments respectively. The chemical composition analysis showed that most of the fibers, fragments, and beads were polyethylene while the sheets were composed of polypropylene. Nevertheless, the foams isolated from the samples were composed of polystyrene. Within 24 h, about 2.4 ? 2.4 billion microplastic pieces were estimated to be transported from a single water channel into the river. The highest discharge of MPs was estimated from the sullage carrier with about 7 billion pieces/day.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Microplastic pollution Freshwater microplastics Surface water Metropolitan city Pakistan
Megjelenés:	Environmental Science And Pollution Research. - 27 : 14 (2020), p. 16718-16730. -
További szerzők:	Qadir, Abdul Mumtaz, Mehvish Ahmad, Sajid Rashid
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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