Hydrothermal petroleum of Lake Chapala, Citala Rift, western Mexico: Bitumen compositions from source sediments and application of hydrous pyrolysis

Valle, Pedro F. Zárate-del; Rushdi, Ahmed I.; Simoneit, Bernd R.T.

doi:10.1016/j.apgeochem.2006.01.002

Cited by 16 publications

(5 citation statements)

References 22 publications

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“…The oil concentrates mainly on the water surface in the form of oil slicks. The area of the lake covered with oil slicks is ~1 km 2 , and it almost has not changed since the discovery of oil seep in 2005. From 2005 to 2019, the concentration of n-alkanes in the surface water ranged between 0.2 and 8.3 µg/L, with an average value of 3.6 µg/L.…”

Section: Discussionmentioning

confidence: 99%

“…The distribution of petroleum hydrocarbons in Baikal water from the site of deep seepage is limited, and water pollution is localised. The total concentrations of n-alkanes at the reference station (St.1, Ʃ alk ≤ 0.15 µg/L; Russell and Rosell-Mele, 2005;Gorshkov et al, 2010) are up to 35 times lower than the maximum Ʃalk concentrations found in the water column and on the water surface near Cape Gorevoy Utes. PAH concentrations in the surface water layer at sites without oil slicks on the surface and deep layers are comparable with Ʃ PAH concentrations at reference stations and in the pelagic zone (7.0-36 ng/L; Gorshkov et al, 2018).…”

Section: Assessment Of Baikal Water Pollution Near the Deep Oil Seepmentioning

confidence: 91%

“…At sites with a flat bottom and near these structures, there were accumulations of liquid oil droplets that floated without any periodicity (Khlystov et al, 2009). According to estimates (Khlystov et al, 2007;Kontorovich et al, 2007), the amount of oil entering Baikal waters at this site does not exceed 4 t/y, which is not comparable to the volumes of industrial oil discharged into the surface waters of the world's oceans during technological disasters (Hazen et al, 2010;Vila Assessment of water pollution near the deep oil seep in Lake Baikal Yender and Stanzel, 2011). Nevertheless, constant oil emission, low water temperature and the long replacement period of lake water by tributaries (ca.…”

Section: Introductionmentioning

confidence: 92%

“…Moreover, diatoms Synedra acus subsp. radians, the dominant species of Baikal phytoplankton, accumulate PAHs in their lipid bodies (Pavlova et al, 2005;2012;Shishlyannikov et al, 2017;Gorshkov et al, 2020).…”

Section: Assessment Of Baikal Water Pollution Near the Deep Oil Seepmentioning

confidence: 99%

“…Natural oil seepage in freshwater lakes is associated with rift zones: Lake Tanganyika -with the East African Rift (Simoneit et al, 2000), Lake Chapala -with the Citala Rift (E-W) (Zarate-del Valle et al, 2006), and Lake Baikal -with the Baikal rift. High heat flux in the rift zone of Baikal (76 mW/m 2 on average, Golmshtok et al, 2000) contributes to the heating of sedimentary formations and stimulates the generation of hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of water pollution near the deep oil seep in Lake Baikal

Горшков

Izosimova

Pavlova

et al. 2020

LFWB

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Water purity was assessed at the site of a deep oil seepage near Cape Gorevoy Utes (Central Baikal). Polycyclic aromatic hydrocarbons (PAHs) and n-alkanes were determined in different types of oil-containing samples collected at this section of Lake Baikal. The set of studied samples included: (i) samples of water from the surface water layer; (ii) samples of water from different depths; (iii) oil on the water surface; (iv) oil from a sediment core. In the surface water layer and the water column, the total concentration of n-alkanes ranged from 0.2 to 5.3 µg/L and did not exceed the 0.1 maximum permissible concentration (MPC fish = 50 µg/L) established for hydrocarbons in water bodies of fishery importance. PAHs with carcinogenic properties were less than 0.1 ng/L. The total concentration of PAHs found in the water column did not exceed 110 ng/L; toxic equivalent (TEQ) values ranged from 0.001 to 0.110 ng/L. The distribution of petroleum hydrocarbons from the seepage site was limited, and water pollution was localised. The low level of water pollution is associated with natural mechanisms in the Baikal ecosystem. Microbiological community and phytoplankton make a decisive contribution to the purity of Baikal water, and oil fractionation during deep discharge contributes to the bioavailability of petroleum hydrocarbons.

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Section: Discussionmentioning

confidence: 99%

Section: Assessment Of Baikal Water Pollution Near the Deep Oil Seepmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 92%

Section: Assessment Of Baikal Water Pollution Near the Deep Oil Seepmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of water pollution near the deep oil seep in Lake Baikal

Горшков

Izosimova

Pavlova

et al. 2020

LFWB

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Hydrous Pyrolysis

Lewan¹

2017

Selective Neck Dissection for Oral Cancer

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Anaerobic oxidation of petroleum hydrocarbons in enrichment cultures from sediments of the Gorevoy Utes natural oil seep under methanogenic and sulfate-reducing conditions

et al. 2021

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This article presents the rst experimental data on the ability of microbial communities from sediments of the Gorevoy Utes natural oil seep to degrade petroleum hydrocarbons under anaerobic conditions. Like in marine ecosystems associated with oil discharge, available electron acceptors, in particular sulfate ions, affect the composition of the microbial community and the degree of hydrocarbon conversion. The cultivation of the surface sediments under sulfate-reducing conditions led to the formation of a more diverse bacterial community and greater loss of n-alkanes (28%) in comparison to methanogenic conditions (6%). Microbial communities of both surface and deep sediments are more oriented to degrade polycyclic aromatic hydrocarbons (PAHs), to which the degree of the PAH conversion testi es (up to 46%) irrespective of the present electron acceptors. Uncultured microorganisms with the closest homologues from thermal habitats, sediments of mud volcanoes and environments contaminated with hydrocarbons mainly represented microbial communities of enrichment cultures. The members of the phyla Firmicutes, Chloro exi, and Caldiserica (OP5), as well as the class Deltaproteobacteria and Methanomicrobia, were mostly found in enrichment cultures and belong to the "core" of microorganisms The in uence of gas-saturated uids may be responsible for the presence in the bacterial 16S rRNA gene libraries of the sequences of "rare taxa": Planctomycetes, Ca. Atribacteria (OP9), Ca. Armatimonadetes (OP10), Ca. Latescibacteria (WS3), Ca. division (AC1), Ca. division (OP11), and Ca. Parcubacteria (OD1), which can be involved in hydrocarbon oxidation.

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Hydrothermal petroleum of Lake Chapala, Citala Rift, western Mexico: Bitumen compositions from source sediments and application of hydrous pyrolysis

Cited by 16 publications

References 22 publications

Assessment of water pollution near the deep oil seep in Lake Baikal

Assessment of water pollution near the deep oil seep in Lake Baikal

Hydrous Pyrolysis

Anaerobic oxidation of petroleum hydrocarbons in enrichment cultures from sediments of the Gorevoy Utes natural oil seep under methanogenic and sulfate-reducing conditions

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