Mineralogical composition and total organic carbon quantification using x-ray fluorescence data from the Upper Cretaceous Eagle Ford Group in southern Texas

AAPG Bulletin ◽  
2019 ◽  
Vol 103 (12) ◽  
pp. 2891-2907 ◽  
Author(s):  
Ahmed Alnahwi ◽  
Robert G. Loucks
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Upper Cretaceous ◽  
Mineralogical Composition ◽  
Eagle Ford ◽  
X Ray

High-resolution hyperspectral-based continuous mineralogical and total organic carbon analysis of the Eagle Ford Group and associated formations in south Texas

AAPG Bulletin ◽  
2020 ◽  
Vol 104 (7) ◽  
pp. 1439-1462 ◽  
Author(s):  
Ahmed Alnahwi ◽  
Tobi Kosanke ◽  
Robert G. Loucks ◽  
James Greene ◽  
Xiuju Liu ◽  
...  
Keyword(s):  
High Resolution ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
South Texas ◽  
Eagle Ford ◽  
Total Organic Carbon Analysis ◽  
Carbon Analysis

Correlation of chemostratigraphy, total organic carbon, sequence stratigraphy, and bioturbation in the Woodford Shale of south-central Oklahoma

2018 ◽  
Vol 6 (1) ◽  
pp. SC43-SC54
Author(s):  
Sabrina M. Coleman ◽  
Douglas W. Jordan
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Sequence Stratigraphy ◽  
Algal Blooms ◽  
Bottom Water ◽  
Woodford Shale ◽  
X Ray ◽  
South Central ◽  
Technological Advances ◽  
Water Conditions

Technological advances in handheld X-ray fluorescence (HHXRF) have been instrumental in demonstrating the utility of chemostratigraphic data to create higher order sequence stratigraphic interpretations. This study seeks to identify the correlation between chemostratigraphy, total organic carbon, sequence stratigraphy, and bioturbation in the Woodford Shale of south-central Oklahoma using HHXRF and X-ray diffraction technologies. The use of multiproxy correlations allows for higher confidence identifying lateral changes in the Woodford Shale. Elemental data collected through HHXRF can be used as proxies to better understand the depositional environment of a formation. Titanium, Zr, K, and Al are all proxies for transgression and regression. Silica is associated with so many different elements that Si alone does not provide useful information; however, the ratio of Si/Al coupled with detrital proxies can give information on the presence of possible algal blooms, continentally derived sediment, or hiatal surfaces. Furthermore, relationships between other elements can give further understanding to bottom-water conditions at the time of deposition. This study examines the relationships between Mo, V, Ni, and P along with other elements and laboratory-collected data to further understand the bottom-water conditions during deposition of the organic-rich muds that make up the Woodford Shale in south-central Oklahoma. To some extent, it is then possible to correlate these higher-resolution understandings to open-hole well logs to increase our understanding, where the core is unavailable.

Effect of total organic carbon and aquatic humic substances on the occurrence of lead at the tap

2015 ◽  
Vol 52 (1) ◽  
pp. 2-10 ◽  
Author(s):  
Lisa D. Winning ◽  
Beata Gorczyca ◽  
Kenneth Brezinski
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Humic Substances ◽  
Free Chlorine ◽  
X Ray Diffraction ◽  
X Ray ◽  
Treated Water ◽  
Aquatic Humic Substances ◽  
Lead Release ◽  
The City

Homes with lead service lines (LSLs) in the City of Brandon, Manitoba, Canada, were found to exceed the provincial standard of 10 μg/L for lead in drinking water. Solids identified by X-ray diffraction of LSL scale were Pb5O8 and PbO2, indicating that lead(II) solids in the LSL scale have been oxidized to lead(IV) solids by free chlorine residuals. Natural organic matter (NOM) can reduce PbO2 within a few hours, and Brandon treated water has high levels of NOM at approximately 5–7.6 mg/L as total organic carbon (TOC). As water stagnates in the LSL during periods of no water use the free chlorine residual is depleted, permitting PbO2 to oxidize NOM and be reduced to more soluble lead(II) species, resulting in an increase in dissolved lead concentrations. Although it is generally believed that aquatic humic substances (AHS) are primarily responsible for the reductant capacity of NOM, removal of AHS from the treated water resulted in a 6% decrease in lead release from PbO2, while removal of 50% of total NOM resulted in a 75% decrease in lead release. AHS and TOC were not found to play a significant role in the reduction of PbO2 in this water.

scholarly journals Using BiVO4/CuO-Based Photoelectrocatalyzer for 4-Nitrophenol Degradation

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1322 ◽  
Author(s):  
Thiago Martimiano do Prado ◽  
Fernando Lindo Silva ◽  
Guilherme Grosseli ◽  
Pedro Sergio Fadini ◽  
Orlando Fatibello-Filho ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Hybrid Material ◽  
High Performance ◽  
X Ray Diffraction ◽  
Secondary Products ◽  
X Ray ◽  
Additional Information ◽  
Munk Function ◽  
Nitrophenol Degradation

The present work reports the degradation of 4-nitrophenol using BiVO4/CuO hybrid material synthesized by the precipitation of BiVO4 in the presence of CuO. Morphological and structural characterizations were performed using X-ray diffraction and scanning electronic microscopy coupled to energy dispersive X-ray spectroscopy. Through the calculation of the Kubelka–Munk function applied to diffuse reflectance spectrophotometry data, the hybrid material presented absorption edge of 1.85 eV. The formation of p-n heterojunction between BiVO4 and CuO renders the hybrid material suitable for the construction of a photoanode employed in hydroxyl radical generation. UV–vis spectrophotometry and high-performance liquid chromatography experiments were performed in order to monitor the degradation of 4-nitrophenol and the formation of secondary products. Additional information regarding the hybrid material was obtained through ion chromatography and total organic carbon analyses. The application of BiVO4/CuO-based photocatalyzer led to a 50.2% decrease in total organic carbon after the degradation of 4-nitrophenol. Based on the results obtained in the study, BiVO4/CuO has proved to be a promising material suitable for the removal of recalcitrant compounds in water treatment plants.

scholarly journals CHARACTERIZATION OF THE ASSISTÊNCIA MEMBER, IRATI FORMATION, PARANÁ BASIN, BRAZIL: ORGANIC MATTER AND MINERALOGY / CARACTERIZAÇÃO DO MEMBRO DO ASSISTÊNCIA, FORMAÇÃO IRATI, BACIA DO PARANÁ, BRASIL: MATÉRIA ORGÂNICA E MINERALOGIA

2016 ◽  
Vol 3 (1) ◽  
pp. 36-45 ◽  
Author(s):  
Werlem Holanda ◽  
Sergio Bergamaschi ◽  
Anderson Costa dos Santos ◽  
René Rodrigues ◽  
Luiz Carlos Bertolino
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Fuel Oil ◽  
Insoluble Residue ◽  
X Ray ◽  
Irati Formation ◽  
Paraná Basin ◽  
Rock Eval ◽  
Parana Basin

Currently, the Irati Formation, in Paraná Basin, Brazil, represents one of the world's largest reserves of oil shale. Among the shale-derived products stands out the fuel oil, gas, naphtha, fuel, liquefied gas, and sulfur, in addition to byproducts that can be used by the asphalt, cement, agricultural, and ceramics industries. This study describes and illustrates features of organic-rich shales of the Lower Permian Assistência Member, Irati Formation, scanning electron microscopy (SEM) was combined with energy-dispersive x-ray spectrometric (EDS), x-ray diffraction (XRD), total organic carbon (TOC), total sulfur (S), insoluble residue (IR) and Rock-Eval pyrolysis to characterize the mineral composition, organic matter distribution and different types of pore at the micrometer scale. These analyses were performed on samples from well SP-32-PR located in the Sapopema township, Northeast Paraná State, in South of Brazil. The investigations demonstrated that the Assistance Member has high total organic carbon (TOC) content, generation potential (S2) and hydrogen index (HI), but is in an immature stage. The mineralogical content of the Assistência Member presents intervals rich in quartz, plagioclase, carbonates and clay minerals. Pores distribution includes intraparticle within organic matter and interparticle pores in pyrite framboids, surrounding quartz grains and between organic matter and mineral grains. ResumoAtualmente, a Formação Irati, na Bacia do Paraná, no Brasil, representa uma das maiores reservas mundiais de Petróleo de xisto. Entre os produtos derivados do xisto, destacam-se o óleo combustível, gás, nafta, combustível, gás liquefeito e enxofre, além de subprodutos que podem ser utilizados pelas indústrias de asfalto, cimento, agricultura e cerâmica. Este estudo descreve e ilustra características de xistos ricos em matéria orgânica do Membro Permiano Inferior Assistência, Formação Irati. Microscopia eletrônica de varredura (SEM) foi combinada com Espectrometria de Raios-X de energia dispersiva (EDS), Difração de Raios-X (XRD), carbono orgânico total (COT), enxofre total (S), resíduo insolúvel (IV) e pirólise Rock-Eval para a caracterização da composição mineral, distribuição da matéria orgânica e diferentes tipos de poros à escala micrométrica. Essas análises foram realizadas em amostras do poço SP-32-PR localizadas no município de Sapopema, no nordeste do Paraná, no sul do Brasil. As investigações demonstraram que o Membro de Assistência possui elevado teor de carbono orgânico total (TOC), potencial de geração (S2) e índice de hidrogênio (HI), mas está em um estágio imaturo. O conteúdo mineralógico do Membro Assistência apresenta intervalos ricos em quartzo, plagioclásio, carbonatos e minerais argilosos. A distribuição dos poros inclui intra-partículas na matéria orgânica e poros inter-partículas em framboides de pirita, nos grãos de quartzo circundantes e na matéria orgânica e noutros grãos minerais.

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