Article
Environmental Sciences
Elizabeth Allmon, Grace Carter, Robert Griffitt, Maria S. Sepulveda
Summary: Research on the cardiotoxic effects of oil on fish has mainly focused on rapidly developing pelagic species, with little emphasis on estuarine species with longer embryological periods. This study fills a knowledge gap by exposing sheepshead minnow embryos to oil and measuring cardiac responses through identifying cardiotoxic phenotypes and calculating cardiac output, finding significant increases in pericardial edema and reduced cardiac output at both oil doses. The methods described in this study allow for more physiologically relevant measures of cardiac performance in early life stages.
Article
Engineering, Chemical
Chunqing Xia, Qinglong Liu, Ling Zhao, Lan Wang, Jingchun Tang
Summary: This study investigated the degradation of petroleum hydrocarbons in soil using FeS@BC and FeS activated persulfate (PS). The results showed that the FeS@BC/PS system had a higher removal rate for total petroleum hydrocarbons, polycyclic aromatic hydrocarbons, and n-alkanes compared to the FeS/PS system. Radical quenching experiment and Electron Paramagnetic Resonance revealed that the dominant active substance is sulfate free radical produced by PS during activation. The FeS@BC/PS system has great potential for the remediation of petroleum-contaminated soil.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Zi Jia, Zucheng Wang, Kaijun Lu
Summary: Snow acts as an ideal scavenger of polycyclic aromatic hydrocarbons (PAHs), leading to the accumulation of a large amount of PAHs in snowpacks. However, the fate of PAHs in snow, especially in the context of global climate change, is still unclear. This study investigated the photolysis of 16 priority PAHs listed by the US EPA in snow samples in the field. The results showed that over 50% of PAHs were lost during 6 hours of photolysis, with high molecular weight PAHs being photolyzed faster than low molecular weight PAHs.
ATMOSPHERIC RESEARCH
(2023)
Article
Engineering, Environmental
Jialu Fan, Xianbo Sun, Yongdi Liu, Dongye Zhao, Xiaodi Hao, Wen Liu, Zhengqing Cai
Summary: The photochemical behavior of naphthalene, a model PAH, was investigated under simulated sunlight irradiation in seawater with different dissolved organic matter (DOM). The results showed that naphthalene could undergo direct photolysis and degradation reactions induced by DOM and reactive oxygen species. The presence of fulvic acid and humic acid in DOM promoted the degradation kinetics of naphthalene. However, high levels of DOM led to reduced degradation rates. The study also identified degradation intermediates and found that some of them were more toxic than the original naphthalene.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Zan Wang, Haiyang Hu, Zhan Zhang, Yongming Xu, Ping Xu, Hongzhi Tang
Summary: A new strain, Shinella sp. FLN 14, capable of utilizing fluorene as a sole carbon source and effectively co-metabolizing various PAHs and heterocyclic derivatives was isolated and characterized. The strain exhibited high PAHs degradation activity and showed potential for bioremediation of PAHs-contaminated environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Astronomy & Astrophysics
Nina Kopacz, Maria Angela Corazzi, Giovanni Poggiali, Ayla von Essen, Vincent Kofman, Teresa Fornaro, Hugo van Ingen, Eloi Camprubi, Helen E. King, John Brucato, Inge Loes ten Kate
Summary: In this study, the photochemical evolution of polycyclic aromatic hydrocarbons (PAHs) in Fe-rich clay environments on early Earth and Mars was simulated in experiments. The results showed that ultraviolet radiation catalyzed the degradation of certain PAHs in these environments, leading to the formation of PAH cations. These findings are significant for the studies on the origins of early Earth and Mars, as well as the detection of organic molecules on Mars.
Article
Engineering, Environmental
Lige Zhang, Xiaoyu Qiu, Ling Huang, Jijun Xu, Weiwei Wang, Zhao Li, Ping Xu, Hongzhi Tang
Summary: The PDMC bacterial consortium efficiently degrades PAHs and demonstrates excellent stability in small-scale wastewater bioremediation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Food Science & Technology
Luana Schmidt, Osmar Damian Prestes, Paula Rossini Augusti, Jose Claudio Fonseca Moreira
Summary: Olive oil and olive pomace, as main components of the Mediterranean diet, contain phenolic compounds that contribute to various health benefits. These compounds, such as oleuropein, tyrosol, and hydroxytyrosol, are believed to prevent and control diseases like cardiovascular diseases and cancer. However, olives and their products can be contaminated by mycotoxins, pesticide residues, and polycyclic aromatic hydrocarbons. Phenolic compounds in olive oil and pomace can reduce the toxicity of these contaminants, but the pollutants may also affect the beneficial properties of these products. Further studies are needed to understand the interactions between bioactive and toxic compounds in olive oil and pomace for a better understanding of their health benefits.
Review
Environmental Sciences
Meng Qiao, Weixiao Qi, Huijuan Liu, Jiuhui Qu
Summary: Oxygenated polycyclic aromatic hydrocarbons (OPAHs) have higher concentrations and toxicity in water environments, posing significant ecological risks to surface water ecosystems.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Safaa M. Ezzat, Nashwa A. Ahmed
Summary: This study isolated Janibacter terrae strain S1N1 from the River Nile, Egypt, and found that it has the potential to degrade petroleum crude oil. The researchers also discovered that the degradation efficiency can be boosted through photostimulation. After 48 hours of incubation, 96.5% of the substrate was degraded by the bacteria.
Article
Chemistry, Physical
Thomas Liu, Baptiste Carles, Christine Elias, Claire Tonnele, Daniel Medina-Lopez, Akimitsu Narita, Yannick Chassagneux, Christophe Voisin, David Beljonne, Stephane Campidelli, Loic Rondin, Jean-Sebastien Lauret
Summary: In this study, we conducted single-molecule spectroscopy at cryogenic temperatures to investigate the optical properties of graphene quantum dots (GQDs). We found that temperature has an effect on the spectral characteristics of GQDs, and we used density functional theory calculations to explain these observations. Additionally, we discovered that the vibrational features can serve as a unique fingerprint for identifying GQDs.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Xiushang Xu, Amy L. Vonder Haar, Rengo Yoshioka, Qizheng Zhang, Serhii Vasylevskyi, Andrew J. Musser, Akimitsu Narita
Summary: A benzo[rst]pentaphene derivative, BPP-MeOPA, was synthesized and characterized by NMR and single-crystal X-ray analysis. Investigation of its photophysical properties, including transient absorption spectroscopy, revealed improved absorption and emission features from an S-1 state with excitonic and charge-transfer character by introducing MeOPA groups.
CHEMICAL COMMUNICATIONS
(2023)
Article
Environmental Sciences
Bingxin Xie, Jihong Qin, Hui Sun, Shu Wang, Xin Li
Summary: This study focuses on the distribution and leaching behavior of polycyclic aromatic hydrocarbons (PAHs) in oil-based residues of shale gas drilling cuttings. The results show that the concentration of 4-ring PAHs is the highest, and the concentration of PAHs decreases with increasing particle size of the residues. The leachate from the tested residues shows different PAH concentrations during the leaching process, with each leached PAH accounting for 1.50-3.20% of the total PAHs. The leaching characteristics of PAHs are best described by the first-order diffusion model (FRDM), with the leaching rate initially controlled by surface wash-off and then by diffusion.
Article
Chemistry, Organic
Yushi Ohno, Shogo Ando, Daisuke Furusho, Ryoyu Hifumi, Yuuya Nagata, Ikuyoshi Tomita, Shinsuke Inagi
Summary: Here, a facile and selective synthesis of cationic azatriphenylene derivatives was achieved through electrochemical intramolecular cyclization, where the key step involves atom-economical C-H pyridination without a transition-metal catalyst or an oxidant. This proposed strategy provides a practical approach for introducing cationic nitrogen (N (+)) into pi-electron systems, thus expanding the molecular design of N (+)-doped polycyclic aromatic hydrocarbons.
Article
Multidisciplinary Sciences
Yusuke Nakakuki, Takashi Hirose, Hikaru Sotome, Min Gao, Daiki Shimizu, Ruiji Li, Jun-Ya Hasegawa, Hiroshi Miyasaka, Kenji Matsuda
Summary: Helically twisted conductive nanocarbon materials are suitable for optoelectronic and electromagnetic molecular devices on the nanometer scale, showing a large effective conjugation length and ultrafast decay dynamics. The extended π-helicenes achieved a large effective conjugation length through helical fusion, leading to an absorption edge in the near-infrared region.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Susobhan Das, Subhankar Saha, Mrinmay Sahu, Amit Mondal, C. Malla Reddy
Summary: This study presents a rare example of a dynamic crystal involving the heavy transition metal rhenium, displaying initial two-face elasticity and elasto-plastic deformation at room temperature, followed by transformation into a rotator crystal phase at approximately 105 degrees C. The mechanical tests, X-ray diffraction, mu-Raman, and polarized light microscopy experiments reveal that the elasto-plastic deformation involves molecular rotations and slip, while malleability in the rotator phase is facilitated by reorientational motions and increased symmetry. Connecting plastically bendable crystals with rotator phases is important for designing multi-functional dynamic crystals.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Inorganic & Nuclear
Shreya Mahato, Amit Mondal, Mainak Das, Mayank Joshi, Partha Pratim Ray, Angshuman Roy Choudhury, C. Malla Reddy, Bhaskar Biswas
Summary: The study introduces a novel type of M(II)-Ce(IV) complex salts and highlights their potential in designing smart functional materials. Structural and morphological properties of the compounds are revealed through analytical and spectroscopic methods. The complex salts were utilized to construct Schottky devices to investigate their role in charge-transport phenomenon.
DALTON TRANSACTIONS
(2022)
Editorial Material
Engineering, Environmental
Bryan D. James, Mark E. Hahn, Christopher M. Reddy
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Shibani Mohata, Kaushik Dey, Surojit Bhunia, Neethu Thomas, E. Bhoje Gowd, Thalasseril G. Ajithkumar, C. Malla Reddy, Rahul Banerjee
Summary: Utilizing graphene as a grafting layer, a new method for preparing Janus-type COF-graphene thin films was proposed, demonstrating the fabrication of two distinct Janus-type films with heterogeneous surface morphologies and porosity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Environmental
Michael G. Mazzotta, Christopher M. Reddy, Collin P. Ward
Summary: The study found that marine microbes can degrade cellulose diacetate (CDA) based materials in a matter of months, challenging the belief that CDA-based materials persist in the ocean for decades. This discovery could lead to the identification of high-utility, biobased plastics with low environmental persistence.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Review
Chemistry, Analytical
Stephen A. Wise, Ryan P. Rodgers, Christopher M. Reddy, Robert K. Nelson, Elizabeth B. Kujawinski, Terry L. Wade, Andres D. Campiglia, Zhanfei Liu
Summary: Analytical techniques for chemical analysis of oil and its transformation products have greatly benefited from research following the Deepwater Horizon oil spill. Advanced gas chromatography and high-resolution mass spectrometry have provided a better understanding of the composition and complexity of oil, while novel separation approaches have increased the information available on spilled oil. The development of these techniques is important for future oil spills and investigations into the fate and effects of petroleum and dispersants.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2023)
Article
Energy & Fuels
Christopher M. Reddy, Robert K. Nelson, Ulrich M. Hanke, Xingqian Cui, Roger E. Summons, David L. Valentine, Ryan P. Rodgers, Martha L. Chacon-Patin, Sydney F. Niles, Carlos E. P. Teixeira, Luis E. A. . Bezerra, Rivelino M. Cavalcante, Marcelo O. Soares, Andre H. B. Oliveira, Helen K. . White, Robert F. Swarthout, Karin L. Lemkau, Jagos R. . Radovic
Summary: From August 2019 to June 2021, viscous oil residues appeared along the Brazilian coast, and the exact source of this mystery oil remains undetermined. However, analysis of samples collected from the coastal zone of Ceara state in 2019 suggests that the oil shares a common origin with samples collected from other regions of Brazil. Possible sources include illegal discharges from vessels, leaking offshore platforms, natural seeps, and historic shipwrecks. The composition of the oil samples indicates a blending of different petroleum products.
Article
Engineering, Environmental
Anna N. Walsh, Michael G. Mazzotta, Taylor F. Nelson, Christopher M. Reddy, Collin P. Ward
Summary: Sunlight can chemically transform marine plastics into various products, but the impact of these light-driven transformations on microbial degradation is not well understood. This study examined the interplay between photochemical and biological degradation of cellulose diacetate (CDA) fabrics, revealing that photodegradation enhanced biodegradation and that the use of titanium dioxide (TiO2) accelerated the process. These findings highlight the importance of plastic formulation on its environmental fate and suggest that the synergy between photochemical and biological degradation should not be overlooked in assessing marine plastic persistence.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Heather O. LeClerc, Geoffrey A. Tompsett, Alex D. Paulsen, Amy M. McKenna, Sydney F. Niles, Christopher M. Reddy, Robert K. Nelson, Feng Cheng, Andrew R. Teixeira, Michael T. Timko
Summary: Food waste is a promising resource for renewable fuel production. The use of hydroxyapatite catalyst in hydrothermal liquefaction can increase biocrude yields and promote condensation reactions. Economic and environmental analysis shows that this technology can reduce greenhouse gas emissions and produce renewable diesel.
Article
Engineering, Environmental
Bryan D. James, Sibel I. Karchner, Anna N. Walsh, Neelakanteswar Aluru, Diana G. Franks, Kallen R. Sullivan, Christopher M. Reddy, Collin P. Ward, Mark E. Hahn
Summary: Sunlight can transform plastic into water-soluble products, which may have potential toxicity for vertebrate animals. In this study, we exposed zebrafish larvae to photoproduced and dark leachates from different types of polyethylene bags and films, and evaluated their acute toxicity and gene expression. While we observed no acute toxicity, RNA sequencing revealed differences in the number of differentially expressed genes for each leachate treatment. Gene ontology analysis suggested that the additive-free polyethylene leachates disrupted neuromuscular processes, particularly for the photoproduced leachates. We also found that the composition of photoproduced leachates from conventional bags differed due to titanium dioxide-catalyzed reactions, which may explain the fewer differentially expressed genes elicited by these leachates. This study highlights the product formulation-specific potential toxicity of photoproduced plastic products on gene expression in zebrafish larvae.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Danielle Haas Freeman, Sydney F. Niles, Ryan P. Rodgers, Deborah P. French-McCay, Krista Longnecker, Christopher M. Reddy, Collin P. Ward
Summary: Photochemical weathering changes the properties of petroleum oil, especially in cold water environments. Compared to weathering in the dark, photochemical weathering increases oil viscosity and water-soluble content, decreases oil-seawater interfacial tension, and slightly increases density. The physical properties and fate of photochemically weathered oil in a cold water spill may be significantly different from those in a warm water spill, which could impact oil spill response options.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Bryan D. James, Christopher M. Reddy, Mark E. Hahn, Robert K. Nelson, Asha de Vos, Lihini I. Aluwihare, Terry L. Wade, Anthony H. Knap, Gopal Bera
Summary: In May 2021, the M/V X-Press Pearl containership burned for 2 weeks, causing the largest maritime spill of resinpellets. The spill consisted of nurdles exposed to heat and combustion, burnt plastic pieces, and oil-plastic agglomerates. The burned plastic had a high content of polycyclic aromatic hydrocarbons (PAHs), suggesting the need to classify it as hazardous waste. The disaster highlights the need to re-evaluate the handling and disposal of plastic debris collected from beaches.
ACS ENVIRONMENTAL AU
(2023)
Article
Engineering, Environmental
Bryan D. James, Asha de Vos, Lihini I. Aluwihare, Sarah Youngs, Collin P. Ward, Robert K. Nelson, Anna P. M. Michel, Mark E. Hahn, Christopher M. Reddy
Summary: In late May 2021, a container ship caught fire near the coast of Colombo, Sri Lanka, resulting in a massive release of plastic nurdles. These nurdles underwent various changes due to combustion and heat exposure, including discoloration and partial combustion. The study's findings emphasize the need to explore the impact of partially combusted plastic on the environment and highlight the importance of timely information for managing and recovering from such spills.
ACS ENVIRONMENTAL AU
(2022)