Geochemical features of altered carbonaceous mudstones from Troyanovo-3 mine borehole (Maritsa Iztok lignite field, Bulgaria)

Milakovska, Zlatka; Stefanova, M.; Vladislavov, Georgi; Маринов, Стефан

doi:10.1016/j.coal.2022.104058

Cited by 6 publications

(4 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mitigating factor may also have an important role in the lack of concentrations in the spring due to rainfall. The presence of carbon compounds with odd numbers is due to the source of algae and phytoplankton, where many researchers indicated that the source of the compounds C15, C17 and C19 in the aquatic environment is phytoplankton and algae [24,25] , and the study did not show the predominance of any of the carbon-numbered alkanes compounds As for alkanes with even numbers of carbon, compounds (C18, C20, and C22) were dominant, which may be sourced from zooplankton [26] , while Volkman et al [27] indicated that diatoms in pure cultures produce alkanes compounds with the predominance of C18 and C20 compounds within Short and medium chains. As for the values of the carbon preference index (CPI), which is the ratio of odd to even carbon compounds, the results showed that it was less than one in the Al-Mashab site throughout the study period, which indicates the human source of hydrocarbons in that site [6].…”

Section: Resultsmentioning

confidence: 88%

Presence and distribution of N - alkanes in the waters of some areas of the Shatt Al-Arab River, southern Iraq

Albidhani

Athbi

Al‐Saad

2022

Basrah Researches Sciences

View full text Add to dashboard Cite

The study dealt with (4) stations distributed along the Shatt Al-Arab, namely Al-Mashab, Al-Ashar, Abu Al-Khasib and Al-Faw. Samples were collected monthly over a whole year, starting from January 2012 until December of the same year to estimate and diagnose the n - alkanes in them using Gas Chromatography (GC) . The highest recorded concentrations were (154.92 , 167.34 , 104.56 , 191.00 ) µg/l in the stations ( Al - Mshab , Al - Ashar , Abu Al - Khasib and Al - Faw ) respectively during the month of December . The lowest recorded concentrations were (4.79, 5.46, 3.34, 5.00) µg/l in the same stations, respectively. In terms of seasonal changes, the results showed that the highest rate of normal alkanes was recorded during the winter months and the lowest during the summer months. As for the results of the evidence of the Carbon Preference Index (CPI )and the ratio of Pr/Ph compounds (Pristan / Phytan) it was more than one in some months and less than one in other months, which indicates the common sources of hydrocarbons in the water.

show abstract

Section: Resultsmentioning

confidence: 88%

Presence and distribution of N - alkanes in the waters of some areas of the Shatt Al-Arab River, southern Iraq

Albidhani

Athbi

Al‐Saad

2022

Basrah Researches Sciences

View full text Add to dashboard Cite

show abstract

“…Studies on the organic geochemistry of coalmudstone sequences from Maritsa Iztok Basin (MIB) by Bechtel et al (2005) and Milakovska et al (2021) showed clear distinction in the biomarker community and also in their relations in the sequences from the different basin locations. In a previous investigation on samples from a borehole from Trojanovo-3 Mine of Maritsa Iztok Basin Milakovska et al (2022) found variations in the geochemical features of the carbonaceous mudstones induced by OM transformation and alteration processes. In the present paper, the stratigraphic occurrence of biomarkers is presented for the same core samples.…”

Section: Introductionmentioning

confidence: 95%

“…The mudstone samples were collected from different levels -underlaying, interlayering and covering the coal seams. All samples numbering and bulk characteristics were reported in our previous investigation (Milakovska et al, 2022). Detailed analytical information on schemes of isolation and fractionation is described in the article cited.…”

Section: Samples and Scheme Of Studymentioning

confidence: 99%

Geochemical study of the organic matter from the southern part of the Maritsa Iztok Basin

Milakovska,

Stefanova,

Vladislavov

et al. 2023

Rev. Bulg. Geol. Soc.

Self Cite

View full text Add to dashboard Cite

A sequence of carbonaceous mudstones interlayering three lignite seams is characterized by geochemical proxies. The core samples studied came from a borehole drilled in Trojanovo-3 Mine of Maritsa Iztok Basin. The n-alkane molecular composition is dominated by the > C29 long-chain homologues, with a strong “odd” over “even” homologue predominance. In addition to, the prevailing smooth signature of n-alkane distribution attests for one major organic matter source – land-derived higher plants. The sesqui- and di-terpenoid assemblage specifies the prevalence of Cupressaceae, Taxodiaceae, and Podocarpaceae species in the coal-forming mire. The lupane-type triterpenoids registered are a sign for Betulaceae family presence. Biomarkers for herb, macrophyte and algal/bacterial contribution are also recognizable.

show abstract

“…Lignite is the main locally available energy carrier in the Republic of Bulgaria. In the last decades, the national coal deposits have been thoroughly investigated [81][82][83][84] and characterized [84][85][86][87], along with the emissions of hazardous byproducts [88][89][90][91][92][93]. Over the decades, coal has been revealed as being capable of ensuring the national energy system security upon request.…”

Section: Need For Plausible Energy Transition In Bulgaria 41 Coal Pro...mentioning

confidence: 99%

Coal Share Reduction Options for Power Generation during the Energy Transition: A Bulgarian Perspective

Todorov,

Kralov,

Koprev

et al. 2024

Energies

View full text Add to dashboard Cite

The sustainable energy transition to a low-carbon and climate-neutral economy by 2050 requires a consistent increase in the share of renewable energy sources (RESs) at the expense of the share of fossil fuels. The coal power plants in the Republic of Bulgaria have provided about one third of the annually produced electric power for decades, utilizing mainly locally available sources of lignite. The present work aimed to review the progress of the energy transition, its rejection and acceptance at the national and international scene alongside the available research for cleaner coal combustion in Bulgaria, as well as discuss a Bulgarian perspective for coal share reduction options for power generation during the energy transition. A comprehensive review was carried out, based on freely accessible data such as research and open media articles, officially published field reports, legislative and strategic acts as well as validated statistical data. Three groups of critical gaps (socioeconomic, sociotechnical and cultural and political) were indicated, claimed to be capable of guiding the just transition. Key factors influencing the process dynamics were identified and categorized in the context of the critical gaps. The peculiar policy criteria for the carbon-intensive regions are as follows: the dominant energy carriers, existing infrastructure, involved actors and choice of strategy. The observations allowed us to conclude that in addition to the efforts achieved and ambitious political will, the identification of reliable technological and socioeconomic measures is needed more than ever (accompanied by interdisciplinary research involving the technical, social and environmental and policy factors), while renewables still have long way to go towards complete substitution of the fossil fuels for power generation, transport, and manufacturing. Limited literature was found for reducing the share of coal from currently operating Bulgarian coal-fired power plants (CFPPs). Herein, short- and/or medium-term measures for carbon emission reduction were discussed, capable of promoting the limited operation of existing CFPPs, thus paving the road towards a sustainable, long-term transition. These measures concerned the typically used power units in the largest CFPPs located at the Maritsa Iztok Mining Complex (MIMC). Analyses of the biomass production, supply and cost for the same type of power units were proposed, considering the use of 100% biomass. Estimated costs, unit efficiencies and power generation were discussed along with the evaluations about the land use, ensuring a given annual productivity of wood chips from fast growing plants, e.g., Paulownia.

show abstract

Geochemical features of altered carbonaceous mudstones from Troyanovo-3 mine borehole (Maritsa Iztok lignite field, Bulgaria)

Cited by 6 publications

References 57 publications

Presence and distribution of N - alkanes in the waters of some areas of the Shatt Al-Arab River, southern Iraq

Presence and distribution of N - alkanes in the waters of some areas of the Shatt Al-Arab River, southern Iraq

Geochemical study of the organic matter from the southern part of the Maritsa Iztok Basin

Coal Share Reduction Options for Power Generation during the Energy Transition: A Bulgarian Perspective

Contact Info

Product

Resources

About