Oil contamination in surface sediment of Anzali Wetland in Iran is primarily even carbon number n-alkanes

Azimi-Yancheshmeh, Rokhsareh; Riyahi-Bakhtiari, Alireza; Savabieasfahani, Mozhgan

doi:10.1007/s10661-017-6294-7

Cited by 10 publications

(6 citation statements)

References 66 publications

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“…The highest WST in different years was observed in the central area of Anzali wetland, which is probably affected by water temperature the rivers are around the wetland. Considering that 52% of the entrance is from the Siah darvishan to the center and 44% of the inputs are from Pirbazar, Pasikhan and Khomamrood from the east of the wetland [31,32]. Also after the center, the eastern part of the wetland also has temperature fluctuations, which can be due to less water volume and the presence of vegetation cover in this area.…”

Section: Resultsmentioning

confidence: 99%

Mapping Changes of Water Quality Parameters Pattern in Anzali International Wetland Using Remote Sensing

Zefrehei

Hedayati

Fallah

2021

J. of Wat. & Envir. Tech.

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In this study, the environmental monitoring of Anzali international wetland (based on water surface temperature (WST), chlorophyll-a (Chl-a) and transparency (secchi disk depth (SDD)) parameters) using Landsat images in the period 1985-2018 has been studied. Based on the results of zoning maps, in 2018 and 2013, WST fluctuations are higher, with the lowest water temperature observed in 2007.Based on Chl-a, the trend for this parameter is increasing from 1985 to 2018. Also, from 1985 to 2018, we saw a decrease in transparency (SDD), which could indicate an increase in opacity and concentration of suspended and organic particles in the wetland, which was consistent with the results of chlorophyll-a. Graph examination of wetland showed more changes belonged to the central and eastern parts of the wetland. The results of this study indicate that in the Anzali international wetland, comparing the values of the parameters studied, there are not good conditions for water quality and the need for a solution and management policies to improve the condition of this unique ecosystem is necessary more than ever.

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Section: Resultsmentioning

confidence: 99%

Mapping Changes of Water Quality Parameters Pattern in Anzali International Wetland Using Remote Sensing

Zefrehei

Hedayati

Fallah

2021

J. of Wat. & Envir. Tech.

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“…Many studies have been conducted in recent years for source identification of PAHs in the southern coasts of Caspian Sea (Tolosa et al, 2004;Nemirovskaya et al, 2006;Nemirovskaya and Brekhovskikh ., 2008;Nemati Varnosfaderany et al, 2014;Nemati Varnosfaderany et al, 2015;Shirneshan et al, 2016a,b;Azimi et al, 2017). Results of most of these studies denote the petrogenic origin of PAHs in the southern coasts of the Caspian Sea.…”

Section: Introductionmentioning

confidence: 93%

Polycyclic aromatic hydrocarbon source fingerprints in the environmental samples of Anzali—South of Caspian Sea

Azimi

Bakhtiari

Tauler

2020

Environ Sci Pollut Res

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The major emission sources of polycyclic aromatic hydrocarbons (PAHs) in Anzali city, apportionment of these sources and transfer of PAHs through street dust and runoff to rivers and finally the Caspian Sea were studied. PAHs in environmental samples including street dust, runoff and river sediment samples as well as in major sources of hydrocarbons in urban area including vehicles exhaust, gasoline and diesel fuels, engine oils of automobiles and boats, asphalt and tire debris were extracted by Soxhlet and liquid-liquid extraction in solid and liquid phase and were analyzed by GC-MS. Significance of each source in PAHs emission in the area was identified by chemical fingerprinting. According to the spatial distribution of PAHs in receptor samples stations of street dust and runoff located in the center of the city with high traffic of vehicles had higher concentrations of PAHs than stations in the out bonds of the city. In the river sediment samples, the stations located in the port area had the highest concentrations of PAHs. Results of chemical fingerprinting showed that especially in street dust and runoff samples, the isometric patterns of PAHs were rather similar to those in the proposed major sources, showing that they may have been originated from them, especially from asphalt and tire.On the contrary, river sediment samples were confirmed to receive inputs from other unknown independent sources.

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“…The important presence of petroleum components (e.g., branched alkanes pristane and phytane) compared with nC 17 and nC 18 , respectively, looks as a track of motor vehicle emission (Hamilton et al 1984 ; Alexandrino et al 2019 ; Alkhafaji 2021 ), or petrol spill from contaminated sediments, soils, and waters (Jeng 2006 ; Stortini et al 2009 ; Wang et al 2011 ; Shirneshan et al 2016 ; Azimi-Yancheshmeh et al 2017 , Hernández-Guzmán et al 2021 ). These ratios are adopted also to index the maturity of petroleum and bitumen affecting sediments (Omotoye et al 2016 ; Gao et al 2021 ).…”

Section: The State-of-the-art Of Research About Molecular Signatures ...mentioning

confidence: 99%

Molecular signatures of organic particulates as tracers of emission sources

Cecinato

Bacaloni

Romagnoli

et al. 2022

Environ Sci Pollut Res

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Chemical signature of airborne particulates and deposition dusts is subject of study since decades. Usually, three complementary composition markers are investigated, namely, (i) specific organic compounds; (ii) concentration ratios between congeners, and (iii) percent distributions of homologs. Due to its intrinsic limits (e.g., variability depending on decomposition and gas/particle equilibrium), the identification of pollution sources based on molecular signatures results overall restricted to qualitative purposes. Nevertheless, chemical fingerprints allow drawing preliminary information, suitable for successfully approaching multivariate analysis and valuing the relative importance of sources. Here, the state-of-the-art is presented about the molecular fingerprints of non-polar aliphatic, polyaromatic (PAHs, nitro-PAHs), and polar (fatty acids, organic halides, polysaccharides) compounds in emissions. Special concern was addressed to alkenes and alkanes with carbon numbers ranging from 12 to 23 and ≥ 24, which displayed distinct relative abundances in petrol-derived spills and exhausts, emissions from microorganisms, high vegetation, and sediments. Long-chain alkanes associated with tobacco smoke were characterized by a peculiar iso/anteiso/normal homolog fingerprint and by n-hentriacontane percentages higher than elsewhere. Several concentration ratios of PAHs were identified as diagnostic of the type of emission, and the sources of uncertainty were elucidated. Despite extensive investigations conducted so far, the origin of uncommon molecular fingerprints, e.g., alkane/alkene relationships in deposition dusts and airborne particles, remains quite unclear. Polar organics resulted scarcely investigated for pollution apportioning purposes, though they looked as indicative of the nature of sources. Finally, the role of humans and living organisms as actual emitters of chemicals seems to need concern in the future.

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Oil contamination in surface sediment of Anzali Wetland in Iran is primarily even carbon number n-alkanes

Cited by 10 publications

References 66 publications

Mapping Changes of Water Quality Parameters Pattern in Anzali International Wetland Using Remote Sensing

Mapping Changes of Water Quality Parameters Pattern in Anzali International Wetland Using Remote Sensing

Polycyclic aromatic hydrocarbon source fingerprints in the environmental samples of Anzali—South of Caspian Sea

Molecular signatures of organic particulates as tracers of emission sources

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