Article
Engineering, Chemical
Lucia Mateus, Esteban A. Taborda, Carlos Moreno-Castilla, Maria Victoria Lopez-Ramon, Camilo A. Franco, Farid B. Cortes
Summary: This study focuses on the synthesis, use, and reuse of magnetic copper ferrite nanospheres (CFNS) to reduce the viscosity of extra-heavy oil. The CFNS were synthesized with a mean particle size of 150 nm and showed potential for repeated cycles of asphaltene adsorption and desorption. Rheology tests indicated that CFNS at a concentration of 500 mg/L achieved the highest viscosity reduction of 18%, with SiO2 nanoparticles showing similar results. The microstructure of extra-heavy oil changed significantly upon the addition of CFNS, as observed through a decrease in elastic and viscous moduli.
Article
Chemistry, Multidisciplinary
Seyed Amir Sabet, Mohammadreza Omidkhah, Arezou Jafari
Summary: This study investigates the viscosity reduction of extra-heavy crude oil using nanocatalysts and finds that nanosilica is the most efficient catalyst. Additionally, the application of microwave radiation leads to a significant reduction in reaction time for upgrading extra-heavy crude oil.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Emil R. Saifullin, Seyedsaeed Mehrabi-Kalajahi, Chengdong Yuan, Mikhail A. Varfolomeev, Nikolay O. Rodionov, Sarvar Talipov, Kamil G. Sadikov
Summary: This study investigates the influence of different organic ligands on the catalytic activity of copper-based organic salts. It is found that copper stearate and copper decanoate exhibit higher catalytic activity, with copper decanoate having the lowest activation energy during the oxidation process.
Article
Multidisciplinary Sciences
M-C Clochard, O. Oral, T. L. Wade, O. Cavani, M. Castellino, L. Medina Ligiero, T. Elan
Summary: This study reports the detection of Zn(II) in oil-polluted seawater using square-wave anodic stripping voltammetry (SW-ASV) with thin gold electrodes sputtered onto nanoporous poly(acrylic acid)-grafted-poly(vinylidene difluoride) (PAA-g-PVDF) membranes. The PAA grafted nanopores were found to efficiently trap Zn(II) ions. The SW-ASV protocol involved an accumulation step and a stripping step, and revealed the redox potential of Zn at -0.8 V. The calibration allowed for the determination of Zn(II) content in raw production water.
SCIENTIFIC REPORTS
(2022)
Article
Energy & Fuels
Qian-Hui Zhao, Shuai Ma, Jian-Xun Wu, Wei-Feng Chang, Sheng-Fei Zhang, Xin-Ge Sun, Bing Zhou, Zeng-Min Lun, Keng H. Chung, Quan Shi
Summary: Most heavy crude oils undergo degradation and produce naphthenic acids, which are polar compounds that affect oil viscosity. The relationship between the molecular composition of naphthenic acids and oil viscosity is not well understood. This study analyzed a clean heavy oil with low heteroatom content but high naphthenic acid content. It was found that naphthenic acids with 2-3 rings and 15-35 carbon atoms are the dominant components, and the viscosity of the distillation fraction increases exponentially with boiling point.
Article
Green & Sustainable Science & Technology
Noomene Sleimi, Insaf Bankaji, Rim Kouki, Nesrine Dridi, Bernardo Duarte, Isabel Cacador
Summary: The issue of trace metal elements remains relevant and causes environmental problems. The choice of extraction methods has a significant impact on the levels of these elements in vegetal tissues. Our study demonstrates the importance of specific extraction procedures for different metals and shows variations in trace metal levels depending on the extraction techniques used.
Article
Chemistry, Multidisciplinary
Lucia Romero-Hernandez, Patricia Velez, Itandehui Betanzo-Gutierrez, Maria Dolores Camacho-Lopez, Rafael Vazquez-Duhalt, Meritxell Riquelme
Summary: The study evaluated the ability of fungal isolates obtained from deep-sea sediments in the Mexican EEZ of the Gulf of Mexico to degrade heavy crude oil (HCO) and extra-heavy crude oil (EHCO). Results showed that Alternaria sp. fungi were able to grow and efficiently degrade EHCO as the sole carbon source, demonstrating its potential for bioremediation in future studies.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Jessica I. Lozano-Navarro, Arturo Palacio-Perez, Edgardo J. Suarez-Dominguez, Josue F. Perez-Sanchez, Nancy P. Diaz-Zavala, Jose A. Melo-Banda, Alejandro Rodriguez-Valdes
Summary: The transport of extra-heavy crude oil is a significant challenge in the oil industry. One solution is the addition of compounds that reduce viscosity and asphaltenes self-aggregation. New 'green' additives, such as common geranium extracts, show promise in replacing traditional and toxic substances. Further investigation is needed to understand the effect of these extracts on crude oil properties.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Applied
Maria Luisa Astolfi, Elisabetta Marconi, Giulia Vitiello, Lorenzo Massimi
Summary: The study aimed to develop a fast and simple analytical method to quantify 45 elements in small mass samples of extra virgin olive oils. It was found that using a 5 mL reagent mixture F for sample digestion in a water bath produced satisfactory results, as validated from sample recovery experiments.
Article
Chemistry, Applied
Jianwei Wang, Xiaodong Tang, Jingjing Li, Lan Dai, Guizhong Deng, Zhiqi Zhang
Summary: The application of biomass in enhanced oil recovery of extra-heavy oil shows promise. This study discusses the promoting effect of sawdust on viscosity reduction of extra-heavy oil. Experimental results demonstrate that co-aquathermolysis of sawdust and extra-heavy oil can significantly reduce the viscosity, increase the H/C ratio and oxygen content of the oil. GC-MS analysis reveals that the dehydrogenation and deoxidation reactions of small molecular substances generated by sawdust provide hydrogen and oxygen sources for the upgrading of extra-heavy oil.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Environmental Sciences
Jaime Tapia-Gatica, Ivan Selles, Manuel A. Bravo, Catherine Tessini, Wilson Barros-Parada, Alexey Novoselov, Alexander Neaman
Summary: This study evaluates the risks of arsenic, copper, zinc, and lead contamination in the soil of two important mining areas in Chile and finds that arsenic poses the highest risk. Chile currently lacks specific legislation on legal limits for soil contamination by trace elements, but it is necessary to establish background concentrations and develop national legislation to regulate soil metal contamination.
Article
Energy & Fuels
Wanfen Pu, Chunyun Xu, Shuai Zhao, Ruofan Wang, Kurbanjan Arkin, Fang Zhang
Summary: This study comprehensively investigated the pyrolysis characteristics, kinetics, and thermodynamic parameters of extra-heavy oil. The results revealed a two-stage pyrolysis process and a shift in the pyrolysis reaction mechanism at a certain conversion degree. The thermodynamic analysis showed that the pyrolysis process absorbed large amounts of energy and caused a transition from an organized to a disordered state.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Mario Ramirez-de-Santiago, Edgar Cazares-Ibanez, Humberto Aguilar-Cisneros, Bernardo Carreon-Calderon
Summary: Heavy crude oils are mixed with lighter crude oils to reduce viscosity and ensure flow. This study presents a new correlation to calculate the rescaled parameter for the Arrhenius equation to determine the viscosity of heavy and light hydrocarbon mixtures. The proposed correlation is shown to be more accurate than Shu's correlation.
Article
Energy & Fuels
Shuai Zhao, Wanfen Pu, Jingjun Pan, Sen Chen, Liwei Zhang
Summary: This study analyzed the thermo-oxidative characteristics and kinetics of light, heavy, and extra-heavy oils using accelerating rate calorimetry (ARC). The results showed that light oil could be suitable for air injection, while heavy oil required higher ignition temperatures and longer ignition times. Extra-heavy oil had higher onset self-exothermic and auto-ignition temperatures, indicating the need for even higher ignition temperatures and longer ignition times in in-situ combustion (ISC) processes. The study also provided recommendations for heating heavy and extra-heavy oil reservoirs near the wellbore based on ARC results.
Article
Chemistry, Physical
Richard Djimasbe, Ildar R. Ilyasov, Michael Kwofie, Mohammed A. Khelkhal, Dmitrii A. Emelianov, Ameen A. Al-Muntaser, Muneer A. Suwaid, Mikhail A. Varfolomeev
Summary: The production of hydrogen from unconventional oil is an important area of research in the energy field, and this study focuses on synthesizing and applying promising catalysts based on nickel, cobalt, and nickel-cobalt alloys for hydrogen production from extra-heavy crude oil in the Tahe Oil Field in China. The results show that the presence of a catalyst, especially the Ni-CoAl2O3 catalyst, significantly increases the rate of hydrogen generation. Additionally, the use of supercritical water improves the yield and quality of upgraded oil.
Article
Fisheries
David Jose Nachon, Gilles Bareille, Hilaire Drouineau, Helene Tabouret, Catherine Taverny, Catherine Boisneau, Sylvain Berail, Christophe Pecheyran, Fanny Claverie, Francoise Daverat
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2020)
Article
Fisheries
Lou Frotte, Julien Ringelstein, Dominique Monti, Marie Robert, Christophe Pecheyran, Nadia Ameziane, Helene Tabouret
ECOLOGY OF FRESHWATER FISH
(2020)
Article
Ecology
Marilia Hauser, Fabrice Duponchelle, Theodore W. Hermann, Karin E. Limburg, Leandro Castello, Donald J. Stewart, Gislene Torrente-Vilara, Aurea Garcia-Vasquez, Carmen Garcia-Davila, Marc Pouilly, Christophe Pecheyran, Emmanuel Ponzevera, Jean-Francois Renno, Arthur S. Moret, Carolina R. C. Doria
FRESHWATER BIOLOGY
(2020)
Article
Chemistry, Analytical
Nagore Grijalba, Maite Maguregui, Nora Unceta, Hector Morillas, Bernard Medina, Ramon J. Barrio, Christophe Pecheyran
MICROCHEMICAL JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Mathilde Monperrus, Christophe Pecheyran, Valerie Bolliet
APPLIED SCIENCES-BASEL
(2020)
Article
Environmental Sciences
Pierre Poitevin, Laurent Chauvaud, Christophe Pecheyran, Pascal Lazure, Aurelie Jolivet, Julien Thebault
MARINE ENVIRONMENTAL RESEARCH
(2020)
Article
Multidisciplinary Sciences
Yossi Zaidner, Laura Centi, Marion Prevost, Norbert Mercier, Christophe Falgueres, Gilles Guerin, Helene Valladas, Mailys Richard, Asmodee Galy, Christophe Pecheyran, Olivier Tombret, Edwige Pons-Branchu, Naomi Porat, Ruth Shahack-Gross, David E. Friesem, Reuven Yeshurun, Zohar Turgeman-Yaffe, Amos Frumkin, Gadi Herzlinger, Ravid Ekshtain, Maayan Shemer, Oz Varoner, Rachel Sarig, Hila May, Israel Hershkovitz
Summary: The discovery of Middle Pleistocene Homo fossils at the open-air site of Nesher Ramla in Israel sheds light on the culture and behavior of Homo during that period, indicating a close similarity in stone-tool production technologies between Homo and early Homo sapiens in western Asia, suggesting possible cultural interactions between the two populations.
Article
Chemistry, Analytical
Loic Martin, Asmodee Galy, Gaelle Barbotin, Fanny Claverie, Edwige Pons-Branchu, Chantal Tribolo, Norbert Mercier, Christophe Pecheyran
Summary: This study presents a new methodology for U/Th dating of carbonate materials using femtosecond laser ablation single-collector inductively coupled plasma sector field mass spectrometry (fsLA single-collector ICP-SFMS), isotopic mappings, and image processing. The method allows for analysis of samples with very low U levels and can work on small samples such as shell fragments. The accuracy of the method was evaluated by comparing the results with conventional U/Th dating techniques.
ANALYTICAL CHEMISTRY
(2022)
Article
Limnology
Julien Thebault, Aurelie Jolivet, Matthieu Waeles, Helene Tabouret, Sophie Sabarot, Christophe Pecheyran, Aude Leynaert, Klaus Peter Jochum, Bernd R. Schone, Lukas Frohlich, Valentin Siebert, Erwan Amice, Laurent Chauvaud
Summary: Human activities are increasingly impacting phytoplankton dynamics in coastal ecosystems globally, but there are major disparities among sites and through time. Studying chemical information archived in shells of Pecten maximus can provide insights into phytoplankton dynamics over larger scales.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Chemistry, Analytical
M. Carmen Garcia-Poyo, Sylvain Berail, Anne Laure Ronzani, Luis Rello, Elena Garcia-Gonzalez, Flavio V. Nakadi, Maite Aramendia, Javier Resano, Martin Resano, Christophe Pecheyran
Summary: This article investigates the importance of Cu fractionation and Cu isotopic composition in understanding Wilson's disease (WD) and proposes a machine learning model for diagnosis. The study finds that the relative exchangeable Cu (REC) parameter is crucial for distinguishing WD patients from others, and machine learning can achieve accurate and reliable diagnosis.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Chemistry, Analytical
Michael Susset, Axelle Leduc-Gauthier, Anne-Claire Humbert, Fabien Pointurier, Christophe Pecheyran
Summary: This study compares four different methods of sample preparation for quantitative multi-elemental analyses by LA-ICP-MS. The preparation of glass beads method showed similar signal stability and percentage above the threshold as NIST glasses, indicating its effectiveness. However, certain sample preparation methods may lead to contamination of specific elements.
ANALYTICAL SCIENCES
(2023)
Article
Fisheries
Helene de Pontual, Kirsteen M. MacKenzie, Helene Tabouret, Francoise Daverat, Kelig Mahe, Christophe Pecheyran, Karin Hussy
Summary: Although otoliths are widely used in fish ecology, fisheries management, and species conservation, the biomineralization process of otoliths remains poorly understood. This study investigated the spatial heterogeneity of elemental incorporation in otoliths of two species and revealed clear asymmetry in element concentrations. These findings highlight the need for further research on otolith biomineralization and provide recommendations for sampling strategies to avoid analytical biases.
JOURNAL OF FISH BIOLOGY
(2023)
Article
Chemistry, Analytical
Flavio Nakadi, M. Carmen Garcia-Poyo, Christophe Pecheyran, Martin Resano
Summary: High-resolution continuum source graphite furnace atomic absorption spectrometry (HR CS GFAAS) provides wavelength information that can be used to effectively address potential spectral overlaps. The Time-Absorbance Profile (TAP) method can be deployed to correct for spectral overlaps without the need for additional measurements or prior knowledge of the overlapping species.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Chemistry, Analytical
M. Carmen Garcia-Poyo, Christophe Pecheyran, Luis Rello, Elena Garcia-Gonzalez, Sharay Alonso Rodriguez, Flavio V. Nakadi, Maite Aramendia, Martin Resano
Summary: Accurate quantification of copper can be achieved using four different devices, with HemaXis DB10 and HemaPEN performing better at low copper levels. The proposed method allows patients to prepare their own samples for fast analysis, showing good agreement between venipuncture and dried blood spot specimens for copper determination.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Chemistry, Analytical
Emilie Berard, Christophe Pecheyran, Philippe Dillmann, Stephanie Leroy, Enrique Vega, Alan Williams, Catherine Verna, Valerie Toureille
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2020)
Article
Chemistry, Analytical
Michel Rocha Baqueta, Augusto Cesar Costa-Santos, Ana Paula Rebellato, Gisele Marcondes Luz, Juliana Azevedo Lima Pallone, Federico Marini, Alexsandro Lara Teixeira, Douglas N. Rutledge, Patricia Valderrama
Summary: This study reports the essential element composition of new Brazilian Canephora coffees and applies chemometric tools for analysis. The results demonstrate the suitability of this method for origin and species discrimination based on the inorganic fraction of coffee.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mengjie Li, Jiapeng Wang, You Zhou, Yang Chen, Lingying Xia
Summary: A novel photoelectrochemical biosensor based on gold nanoparticles and specific structures was developed for highly sensitive detection of mercury ion. The multiple sandwich structures hindered electron supply and light harvesting, resulting in a weakened PEC signal, while the specific structures extinguished the PEC signal, enabling quantitative detection of Hg2+. The sensor exhibited high selectivity and stability, with potential applications in environmental detection, biological analysis, and medical research.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mohamed A. Korany, Rasha M. Youssef, Marwa A. A. Ragab, Mostafa A. Afify
Summary: A stability-indicating fit-for-purpose method was developed for the determination of HC, TL, and PS in syrup dosage form. The method successfully separated CL from THY and quantified the analytes using HPLC-DAD. The robustness of the method was assessed through statistical analysis and self-validation.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Lingling Lin, Minyu Li, Ping Li, Chenqing Ye, Huanglong Zhuang, Shaohuang Weng, Feng Chen
Summary: This study developed a highly sensitive and selective electrochemical sensor for simultaneous detection of dopamine and uric acid. The sensor exhibited excellent anti-interference and stability, and could accurately measure dopamine and uric acid in human urine samples.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Peifang Chen, Caiyun Jiang, Zhouping Wang, Hong-zhen Lian, Xiaoyuan Ma
Summary: In this study, a high-performance SERS-active aptasensor was successfully developed for the quantitative analysis of AFB1 in cereal grains, which is of great significance in the field of food safety.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
E. Abas, C. Marina-Montes, C. Perez-Marin, J. Puimedon, J. Anzano
Summary: This study conducted a comprehensive measurement of natural and anthropogenic radionuclides in soil, water, and air in different locations around Deception Island in Antarctica. The results revealed significant levels of 210Pb and anthropogenic 137Cs in soil samples near old human settlements and facilities, as well as detectable levels of 137Cs and 60Co in water samples from old hunting areas. The findings also suggested potential resuspension processes based on higher-than-expected air quality results.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Joao Franciso Allochio, Nayara A. dos Santos, Nathalia dos S. Conceicao, Clara S. D. Baptista, Keyller B. Borges, Valdemar Lacerda Jr, Wanderson Roma
Summary: This study developed a fiber spray ionization mass spectrometry (FSI-MS) method, which shows great potential in detecting illicit drugs. Compared with paper spray ionization mass spectrometry (PSI-MS), FSI-MS demonstrates higher sensitivity in COC detection.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Dina A. Ahmed, Ola G. Hussein, Mamdouh R. Rezk, Mohamed Abdelkawy, Yasmin Rostom
Summary: The main goal of this study was to develop two green chromatographic techniques, HPLC and TLC, for the determination of alcaftadine (ALF) in pharmaceutical formulation and biological samples. The developed HPLC technique showed high efficiency and minimal environmental impact, successfully identifying ALF in the presence of its degradate. The TLC method provided a stability indicating study for ALF and was determined to be safe, green, and eco-friendly.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Abdullah Taner Bisgin
Summary: A green, speedy, and handy method for separation and determination of four commonly used food colorants was established using vortex assisted sequential-simultaneous liquid phase micro-extraction (VA-SS-LPME). The method does not require any instrumental chromatographic techniques. The procedure includes sequential separation steps using different extractants and simultaneous UV-vis spectrophotometric determination steps. The method is environmentally friendly and applicable for determination of colorants in food and pharmaceuticals.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Yifan Zhang, Tong Zhang, Wenjing Ba, Li Liu, Yuan Rao, Xiaodan Zhang, Hanhan Zhang, Xiu Jin
Summary: This paper proposes a novel spectral transfer modelling method based on neural network architecture searching for the asymptomatic prediction of Akizuki pear cork spot disorder. The experiments show that the model by this method is more effective, achieving an accuracy of 82.61%.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Krzysztof Greda, Maja Welna, Anna Szymczycha-Madeja, Pawel Pohl
Summary: For the first time, a dispersive micro-solid phase extraction (D-mu SPE) based on graphene oxide was used for the ultrasensitive determination of Cd. With this method, Cd can be efficiently extracted from a mixture of alkali and alkaline earth metals without the need for an elution step. The combination of D-mu SPE and SAGD OES significantly reduces matrix effects and improves the tolerance of Cd to alkali metals. The method shows simplicity in the measurement system and the commercially available nanosorbent used.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
P. K. Fathima Anjila, G. R. Tharani, Anand Sundaramoorthy, Venkat Kumar Shanmugam, Karthikeyan Subramani, Shanmugavel Chinnathambi, Ganesh N. Pandian, Vimala Raghavan, Andrews Nirmala Grace, Singaravelu Ganesan, Mangaiyarkarasi Rajendiran
Summary: This work proposes a rapid and sensitive spectroscopic method for detecting melamine in food products using rare-earth Terbium-doped Graphene Quantum Dots (Tb-GQDs) synthesized by microwave and simple chemical conjugation methods. The synthesized Tb-GQDs show a spherical shape with a size of approximately 6 nm and a quantum yield of 52%. The maximum detection limit for melamine concentration in milk and milk products is found to be 0.31 μM. The dual emitting Tb-GQDs provide a sensitive and effective platform for real-time detection of melamine in food samples, particularly in milk, and show promising potential in the food industry.
MICROCHEMICAL JOURNAL
(2024)
Review
Chemistry, Analytical
Piyush Dey, Mandeep Kaur, Akhil Khajuria, Dilmeet Kaur, Manpreet Singh, Hema Kumari Alajangi, Neha Singla, Gurpal Singh, Ravi Pratap Barnwal
Summary: Environmental issues, such as the uncontrolled release of dangerous pollutants, have significant impacts on human health. Traditional methods for detecting pollutants require specialized personnel and equipment, but nanotechnology has improved the performance of biosensors. This article discusses the use of nanotechnology in pollutant detection and the associated techniques.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Sa Dong, Qiuyun Shi, Lingjun Guan, Yulong Wang, Pengyan Liu, Cunzheng Zhang, Jianguo Feng
Summary: In this study, a highly sensitive indirect competitive chemiluminescence enzyme immunoassay (icCLEIA) method was developed for the determination of sodium pentachlorophenolate (PCP-Na) and its metabolite pentachlorophenol (PCP). The method showed high specificity and affinity with a detection limit of 0.0032 ng/mL for PCP-Na and 0.0192 ng/mL for PCP. The method had no cross reaction with other chlorophenols compounds except for PCP. The average recoveries in chicken, pork and fish samples were 81.3-105.8% with low coefficient of variation (CV).
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Palaniappan Ilayaraja, Murugan Manivannan, Paramasivam Parthiban
Summary: Nirmatrelvir, an antiviral drug used for the treatment of COVID-19, has been recommended by the World Health Organization. We developed an optimized analytical method for the quantification of Nirmatrelvir and its products, with high sensitivity and a wide linear range. The method also meets the requirements for greenness evaluation.
MICROCHEMICAL JOURNAL
(2024)
