Polycyclic Aromatic Hydrocarbons (PAHs) in Surface Sediments of Two Polluted Lagoons in Saudi Arabia

Rasiq, K.T.; El-Maradny, Amr; Bashir, M. El-Amin; Orif, Mohamed I.

doi:10.15244/pjoes/75202

Cited by 19 publications

(2 citation statements)

References 44 publications

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“…The OM sources in coastal lagoons are primarily from terrestrial inputs, primary producer phytoplankton, grazer zooplankton, and decaying species (Müller and Mathesius, 1999;Yamamuro, 2000;Zink et al, 2004;Aké-Castillo et al, 2008;Vizzini and Mazzola, 2008;Ortega-Arbulú et al, 2019). Organic pollutants are also sources of OM in lagoons and depend on the location and the lagoon type (Parolini et al, 2010;Moreno-González et al, 2013;León et al, 2017;Rasiq et al, 2018Rasiq et al, , 2019. Common sources of organic pollutants include agricultural, industrial, and human activities (El- Sayed, 2002; Al-Farawati, 2010; Ali et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, these activities affect the natural habitats of the lagoon and the sedimentary OM content and distribution. The main recent studies have focused on organic contaminants (Alansari, 2019;Ibrahim and Al-Farawati, 2023;Rasiq et al, 2018;Rushdi et al, 2019;Turki and Mudarris 2008), but no study has investigated the types and sources of natural OM input in the lagoon.…”

Section: Introductionmentioning

confidence: 99%

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Natural aliphatic lipids and sterols in sediments from Obhur Lagoon, Red Sea coast of Saudi Arabia: Concentrations, spatial distributions, and sources

Rushdi,

Alharbi,

Rasul

et al. 2024

Preprint

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Samples from the upper surface sediments of Obhur Lagoon - north Jeddah were collected to determine the concentrations, spatial distribution, and sources of natural lipids. The lagoon was divided into three zones based on their immediate ecosystems: Z I (adjoining inland), Z II (the region between Z I and the adjacent coastal Z III), and Z III (coastal region). The major natural biogenic lipid compounds of the total extractable organic matter (TEOM) were n-alkanes (partial), fatty acids, fatty alcohols, and steroids. The n-alkanes of biogenic sources were mainly from terrestrial higher plant wax and decreased from about 38% to 12% from Z I to Z III. Their aquatic algal and diatom sources increased from ~ 1% to 8% for Z I to Z III and microbial inputs decreased from ~ 3% to 0.5% for Z I to Z III. Relative concentrations of fatty acid inputs from higher plants varied from ~ 6% in Z I, 4% in Z II, and 5% in Z III; from aquatic algae sources ~ 80% in all regions; and from microbes ~14-12% with a slight decrease from Z I to Z III. The terrestrial input of fatty n-alcohols decreased from ~ 32% to 11% for Z I to Z III, from ~ 62% to 45% in Z I to Z III from aquatic algae and diatom sources, whereas microbial inputs varied around 10%. Steroid inputs from terrestrial plants were in decreasing order from Z I (37%) to Z III (16%), whilst from the aquatic biota, they increased from Z I (58%) to Z III (76%). The microbial inputs of steroids were in the order of Z III (11.5%) > Z II (9.9%) > Z I (9.4%). The contributions of the total natural lipids from terrestrial sources decreased from Z I (42.8%) to Z III (19.2%), whereas the aquatic source component increased from Z I (53.0%) to Z III (77.4%). The results indicate that the lagoon biogeochemistry is influenced by the immediate ecosystems, hydrodynamic of the lagoon, and human and social activities in the area.

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