Accumulation of polycyclic aromatic hydrocarbons (PAHs) in surface sediment residues of Mahanadi River Estuary: Abundance, source, and risk assessment. (October 2022)

• Record Type: Journal Article
• Authors: Ambade, Balram; Sethi, Shrikanta Shankar; Kurwadkar, Sudarshan; Mishra, Phoolendra; Tripathee, Lekhendra
• Is Part Of: Marine pollution bulletin. Volume 183(2022)
• Publication Date: 2022-10
• Subjects: PAHs -- Ecological toxicity -- Biomass combustion -- Toxic equivalent quotient; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2022.114073
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: In this study, we examined the distribution of polycyclic aromatic hydrocarbons (PAHs) in sediments from the Mahanadi River Estuary (MRE), identified sources, and evaluated the ecological toxicity. The PAHs distributions in MRE ranged from 13.1 to 685.4 ng g −1 (dry weight), with a mean value of 192.91 ± 177.56 ng g −1 (dry weight). Sediments at sites S11, S8, and S13 have the highest 3-rings, 4-rings, and 5-rings PAHs, respectively. In MRE, pyrene has a significantly higher concentration with a mean value of 30.51 ng g −1, followed by Fluoranthene (86.2 ng g −1 ), Chrysene (67.4 ng g −1 ), and Benzo( k )fluoranthene (54.2 ng g −1 ). Site S8 had a higher total PAH concentration than sites S11, S13, and S1. The diagnostic and principal component analysis suggests that PAHs originated from petroleum, oil, biomass, and coal combustion. Higher toxic and mutagenic equivalent quotients indicate potential aquatic toxicity and a need for continuous monitoring of MRE for PAHs pollution. Graphical abstract: Unlabelled Image Highlights: Mahanadi River Estuary (MRE) sediment samples showed PAHs deposition. PAHs deposition in the MRE is due to petroleum, oil, biomass, and coal combustion. MRE's proximity to industries, navigation routes, & discharges causes PAH pollution. Toxic and mutagenic equivalent quotients of PAHs in sediment samples show low risk. Continued long-term monitoring of PAHs in the MRE is crucial for its protection.