Article
Geosciences, Multidisciplinary
J. Michael Battalio, German Martinez, Claire Newman, Manuel de la Torre Juarez, Agustin Sanchez-Lavega, Daniel Viudez-Moreiras
Summary: The study uses measurements from Perseverance and Mars Science Laboratory to observe planetary waves on Mars with periods of 1.5-30 sols. These waves affect various atmospheric variables including temperature, winds, surface pressure, and relative humidity. The detection of waves in multiple variables within Gale and Jezero craters indicates that planetary-scale dynamics play a role in influencing local weather on Mars.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
M. Millan, A. J. Williams, A. C. McAdam, J. L. Eigenbrode, A. Steele, C. Freissinet, D. P. Glavin, C. Szopa, A. Buch, R. E. Summons, J. M. T. Lewis, G. M. Wong, C. H. House, B. Sutter, O. McIntosh, A. B. Bryk, H. B. Franz, C. Pozarycki, J. C. Stern, R. Navarro-Gonzalez, D. P. Archer, V Fox, K. Bennett, S. Teinturier, C. Malespin, S. S. Johnson, P. R. Mahaffy
Summary: The Sample Analysis at Mars (SAM) suite instrument on NASA's Curiosity rover has analyzed the chemical composition of samples from the GT clay-bearing unit at Gale crater on Mars. The analysis revealed a diverse range of organic molecules, including sulfur-bearing aliphatic and aromatic compounds. It also detected nitrogen-containing, oxygen-containing, and chlorine-containing molecules, as well as polycyclic aromatic hydrocarbons. The findings suggest that the clay minerals in the GT unit played a role in preserving ancient organic matter on Mars. These discoveries deepen our understanding of the habitability and potential for life on Mars.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Astronomy & Astrophysics
Moogega Cooper, Fei Chen, Lisa Guan, Akemi A. Hinzer, Gayane Kazarians, Cynthia Ly, Timothy B. Shirey, Kristina Stott
Summary: The Mars 2020 Flight System consists of various components such as a Cruise Stage and the Perseverance rover. The rover has successfully arrived at Jezero Crater and is carrying out scientific objectives, including the search for ancient life traces and the collection of rock and regolith samples. The mission has implemented measures to control biological contamination and protect the integrity of scientific results.
Article
Astronomy & Astrophysics
V. Megevand, J. C. Viennet, E. Balan, M. Gauthier, P. Rosier, M. Morand, Y. Garino, M. Guillaumet, S. Pont, O. Beyssac, S. Bernard
Summary: Experimental evidence shows that UV radiation can increase disorder and create defects in the molecular structure of sulfur-rich organics like cystine, ultimately degrading the Raman signal. Despite this, freshly excavated S-rich organics can still be detected using Raman instruments on Mars, and exploiting fluorescence signals may also allow for their detection due to the short lifetime of organic fluorescence. However, pristine S-rich organic compounds are unlikely to be found on Mars, only their degraded by-products.
Article
Chemistry, Physical
Zhentao Song, Limin Wang
Summary: In this study, the heterostructure of CoSx/Ag/Ag2S/ZnIn2S4 (CAAZ) was synthesized to improve the photocatalytic degradation efficiency of organic pollutants. The attachment of ZnIn2S4 nanosheets to the surface of CoSx hollow structure increased the reactive active sites, while the introduction of Ag/Ag2S nanoparticles accelerated the conduction rate of photogenerated charge between the interfaces.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Astronomy & Astrophysics
A. R. Azari, E. Abrahams, F. Sapienza, D. L. Mitchell, J. Biersteker, S. Xu, C. Bowers, F. Perez, G. A. DiBraccio, Y. Dong, S. Curry
Summary: The Mars Atmosphere and Volatile EvolutioN (MAVEN) mission has provided valuable insights into the dynamic space environment of Mars. The study reveals unexpected characteristics of Mars' magnetic field, influenced by the interplanetary magnetic field, remanent crustal fields, and an underestimated induced effect. The findings also indicate the significant influence of the crustal field and the IMF direction on the magnetotail morphology of Mars.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Geochemistry & Geophysics
Xun Geng, Qing Xu, Jiayao Wang, Chaozhen Lan, Fen Qin, Shuai Xing
Summary: This article describes the techniques and processes used to create geometrically controlled image mosaics for the candidate landing regions of China's first Mars exploration mission using Mars Express High-Resolution Stereo Camera images. The optimized algorithms resulted in high spatial resolution image mosaics.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Astronomy & Astrophysics
Yuanyuan He, Arnaud Buch, Cyril Szopa, Amy J. Williams, Maeva Millan, Charles A. Malespin, Daniel P. Glavin, Caroline Freissinet, Jennifer L. Eigenbrode, Samuel Teinturier, David Coscia, Jean-Yves Bonnet, Jennifer C. Stern, Fabien Stalport, Melissa Guzman, Naila Chaouche-Mechidal, Pin Lu, Rafael Navarro-Gonzalez, Vincent Butin, Jamila El Bekri, Herve Cottin, Sarah Johnson, Michel Cabane, Paul R. Mahaffy
Summary: This study investigated the products and decomposition mechanism of TMAH pyrolysis on Mars in the presence and absence of calcium perchlorate at different heating rates. Additionally, the impact of calcium perchlorate on the recovery rate of fatty acids with TMAH thermochemolysis was studied. Results show that calcium perchlorate has no significant effect on TMAH degradation and recovery rate of fatty acids, which is promising for future organic matter detection missions on Mars.
Article
Chemistry, Applied
Juan Xiao, Junwei Chen, Zuqiao Ou, Junhang Lai, Tongwen Yu, Yi Wang
Summary: In this study, a N-doped graphitic-carbon-coated iron nitride composite was investigated as a heterogeneous electro-Fenton catalyst for efficient removal of organics. The composite showed high activity and stability in decomposing H2O2 to center dot OH and exhibited outstanding performance in removing various organic pollutants with low iron leaching. This work highlights the potential of the MOF-derived Fe3N composite as an efficient catalyst for wastewater treatment.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Nanoscience & Nanotechnology
Bozhen Li, Yiming Li, Jiarui Ren, Fengli Dai, Yaping Zhang, Yufeng He, Pengfei Song, Rongmin Wang
Summary: HA nanowires (HAnW) were used as carriers and promoters to synthesize a HAnW@CoMOF heterojunction, which showed excellent degradation efficiency for organic pollutants, with a removal rate of 97% for tetracycline (TC). The catalytic mechanism involving the formation of Co-OH+ in the HAnW@CoMOF heterojunction was investigated. This study provides a green and effective catalyst for organic pollutant degradation.
ACS APPLIED NANO MATERIALS
(2021)
Article
Biotechnology & Applied Microbiology
Pengyu Zhu, Xiuyun Sun, Kaijin Zhu, Jie Wang, Junwei Bai
Summary: In this study, a stable and excellent composite catalyst CoOx/BiVO4 (Co-Pi/BiVO4) was prepared by electrodeposition to effectively degrade sulfur-containing organics in wastewater. The optimized Co(NO3)2:BiVO4 ratio of 1:3 achieved COD removal and desulfurization rates of 80% and >78%, respectively, under visible light. These values were higher than those achieved with CoOx/BiVO4 and BiVO4. The morphology, crystal form, chemical state, oxygen evolution, and electrical impedance of Co-Pi/BiVO4 were tested and compared with related substances, confirming its strong oxidation and stability. Additionally, the kinetic and degradation mechanisms of related catalysts were analyzed, and protonation pathways of hydroxyl radicals were constructed.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Geochemistry & Geophysics
Doyeon Kim, Paul Davis, Ved Lekic, Ross Maguire, Nicolas Compaire, Martin Schimmel, Eleonore Stutzmann, Jessica C. E. Irving, Philippe Lognonne, John-Robert Scholz, John Clinton, Geraldine Zenhaeusern, Nikolaj Dahmen, Sizhuang Deng, Alan Levander, Mark P. Panning, Raphael F. Garcia, Domenico Giardini, Ken Hurst, Brigitte Knapmeyer-Endrun, Francis Nimmo, W. Tom Pike, Laurent Pou, Nicholas Schmerr, Simon C. Staehler, Benoit Tauzin, Rudolf Widmer-Schnidrig, William B. Banerdt
Summary: The SEIS experiment on Mars provides direct information on the planet's interior structure and dynamics. Ground-motion measurements on Mars are affected by unique signals and environmental conditions, which should be considered for accurate seismic analysis. Understanding the physical processes behind nonseismic signals is crucial for extracting high-fidelity waveforms.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
Review
Astronomy & Astrophysics
Keigo Enya, Yoshitaka Yoshimura, Kensei Kobayashi, Akihiko Yamagishi
Summary: This paper reviews the exploration of space for searching life signatures, with a particular focus on the development of a fluorescence microscope for the search on Mars and other sites. The paper emphasizes the importance of considering the location, targets, and methods of searching for life signatures. The analysis of targeted characteristics, such as morphological similarities to terrestrial microorganisms and metabolic activities and carbon-based composition, can be performed using a fluorescence microscope and specific staining characteristics.
SPACE SCIENCE REVIEWS
(2022)
Article
Engineering, Environmental
Mingshuai Shao, Chao Zhang, Guangyu Cui, Xinyue Bai, Ning Wang, Xue Wang, Qindong Chen, Qiyong Xu
Summary: This study analyzed the organic biodegradability of hydrothermal liquid digestate and discussed the formation and degradation process of inhibitory substances. Results showed that inhibitory substances in the hydrothermal liquid digestate prolonged the lag phase of anaerobic digestion and prevented the utilization of some organics. However, after the degradation of most inhibitory substances, methane production and AD community structure were partially restored.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Chen Wang, Zewei Hu, Wei Lou, Mingjie Huang, Wei Xiang, Tao Zhou, Juan Mao, Xiaohui Wu
Summary: This study has shown that the Fenton fluidized bed (FFB) technology can successfully immobilize As ions on IC carriers, while also crystallizing ferric and mineralizing organic pollutants. The immobilization of As(V) on the IC carriers occurs rapidly through surface favorable bidentate complexion, while the removal of As(III) through adsorption is slow. The addition of Fe3+ inhibits As(V) immobilization but promotes oxidative crystallization of Fe(II) and As(III). As a result, efficient co-crystallization of As(V)/Fe(III) is achieved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)