Studies on polycyclic aromatic hydrocarbons in surface sediments of Mithi River near Mumbai, India: Assessment of sources, toxicity risk and biological impact

Distribution, sources and ecological risk assessment of polycyclic aromatic hydrocarbons in water and sediments from Tiber River and estuary, Italy

“…6). The average level of total TEQ PAHs found in sediment samples of the Tiber River and its Estuary was lower than in the sediments of Bahia Blanca, Argentina (Oliva et al, 2015) and in the sediments of Loire River, France (Bertrand et al, 2015); but were similar to those found in in the sediments of Mithi River, India (Singare, 2015) and the sediments of Cauca River, Colombia (Sarria-Villa et al, 2016). This showed that TEQ PAHs values of the Tiber River and its Estuary were in a low level and indicates that less ecological risk exists in the Tiber River basin.…”

“…The difference between PAH pattern in water and sediments may be due to molecular weight and bacterial degradation. High molecular weight PAHs were more resistant to degradation and could been efficiently transport to and easily accumulate in the sediments largely unaltered Singare, 2015;Zhao et al, 2015). Contrariwise, low molecular weight PAHs were mostly in the dissolved aquatic phase due to their high water solubility and due to benthic recycling, that prevented their incorporation into the bottom sediments.…”

“…PAHs sources can be divided into three classes according to their characteristic fingerprints (Pérez-Fernández et al, 2015;Singare, 2015;Sarria-Villa et al, 2016). The first group is from pyrolytic sources, which includes combustion of fossil fuels, vehicles using gasoline or diesel fuel, waste incineration and coke production, carbon black, coal tar pitch, asphalt and petroleum cracking.…”

“…Furthermore to pyrolytic and petrogenic sources, Per is also produced through in situ degradation of biogenic precursors (Baumard et al, 1998;Tobiszewski and Namiesnik, 2012;Pérez-Fernández et al, 2015;Singare, 2015). Indeed, Per is probably the most important diagenetic PAH encountered in sedimentary environments and, thus, a high abundance of Per relative to other PAHs can indicate an important natural origin of PAHs.…”

PAHs as quality markers of the sediments in the Lower Taquari sub-basin during the period of intervention in a contaminated site

“…A similar result was observed in surface sediments of Mithi River, India where a moderate impact of PAHs was reported based on the Sediment Quality Guidelines (SQG) value (Singare, 2015).…”