Article
Environmental Sciences
Dmitry E. Lakhmanov, Aleksandr Yu. Kozhevnikov, Sergey A. Pokryshkin, Igor P. Semiletov, Dmitry S. Kosyakov
Summary: This study represents the first investigation in 25 years of the lesser-known Siberian arctic seas, revealing the highest levels of PAHs in the Laptev Sea and a generally safe environmental situation in the region.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Dmitry E. Lakhmanov, Aleksandr Yu Kozhevnikov, Sergey A. Pokryshkin, Igor P. Semiletov, Dmitry S. Kosyakov
Summary: This study conducted the first research in 25 years on the least studied and hard-to-reach areas of Siberian Arctic seas. It found that the concentration of polycyclic aromatic hydrocarbons (PAHs) is comparable to the data from the 1990s, indicating a long-term persistence of pollution despite a decline in global PAH emissions. The main sources of PAHs are coal/biomass and liquid fuel combustion.
MARINE POLLUTION BULLETIN
(2022)
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
Environmental Sciences
Yan Lin, Zhengnan Cen, Jinping Peng, Huimin Yu, Peng Huang, Qinghui Huang, Zhibo Lu, Mengyang Liu, Hongwei Ke, Minggang Cai
Summary: Due to its unique environment and geographic location, Svalbard has been identified as a potential pollution reservoir in the Arctic. This study found the presence of microplastics and polycyclic aromatic hydrocarbons (PAHs). Textile materials and fisheries-related debris were identified as possible sources of microplastics and anthropogenic particles. PAHs in soils were mainly derived from traffic emissions and diesel combustion from a local power plant, while ship emissions were the dominant source of PAHs in sediments. Anthropogenic input was confirmed to be higher in Ny-Alesund, while transportation through ocean currents may contribute to the higher abundance of microplastics in Rijpfjorden.
MARINE POLLUTION BULLETIN
(2022)
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
Environmental Sciences
Jennifer F. Provencher, Philippe J. Thomas, Birgit M. Braune, Bruce Pauli, Gregg Tomy, Ifeoluwa Idowu, Patrick O'Hara, Mark L. Mallory
Summary: Seabirds in the Arctic are exposed to various environmental contaminants. This study focused on polycyclic aromatic compounds (PACs), which have received less attention compared to other contaminants. The study found that fulmars generally had higher PAC concentrations than murres, and the concentrations of most PAC groups were higher in birds from 2007/08 compared to 2018. The exception was the higher concentrations of alkylated congeners of heterocyclic aromatic compounds in murres from 2018, indicating recent exposure to refined petroleum products.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zhiyang Lu, Weijun Tian, Surong Zhang, Meile Chu, Jing Zhao, Bingkun Liu, Kun Yang, Huimin Cao, Zhuo Chen
Summary: This study investigated the spatiotemporal distribution, source, and ecological risk of PAHs and SPAHs in surface sediments in Laizhou Bay. The results showed seasonal differences in concentrations of PAHs and SPAHs and a spatial distribution trend of estuary > coast > offshore. Combustion sources, including petroleum, coal, and biomass, were identified as the main contributors to PAHs and SPAHs. The risk level of PAHs was low-to-moderate, while SPAHs posed a moderate-to-high ecological risk.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
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
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
Anne Corminboeuf, Jean-Carlos Montero-Serrano, Richard St-Louis
Summary: The study of marine and on-land sediment samples from the Canadian Arctic Archipelago revealed low concentrations of polycyclic aromatic hydrocarbons (PAHs), mainly originating from natural petrogenic sources and posing a low ecological risk.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Anna Pouch, Agata Zaborska, Mikolaj Mazurkiewicz, Aleksandra Winogradow, Ksenia Pazdro
Summary: This study examined contamination levels of PCBs, HCB, and PAHs in Arctic fjords, and found that the concentrations of contaminants in seawater depend on the physicochemical properties of the compounds, local human activities, and occurrence of glacier meltwaters. While most seawater samples had harmless levels of HCB and PAHs, some suspended particulate matter samples showed toxic levels of these compounds.
MARINE POLLUTION BULLETIN
(2021)
Review
Environmental Sciences
Jamie M. Dearnley, Charles Killeen, Rebecca L. Davis, Vince P. Palace, Gregg T. Tomy
Summary: This article reviews the metabolism and toxicity of polycyclic aromatic compounds (PACs) in fish and presents various methods for analyzing metabolite-containing bile. Recent environmental monitoring studies demonstrate the utility of this technique in assessing oil spill pollution, establishing baseline exposure, and evaluating pollution in urban waterways.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
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
Chemistry, Inorganic & Nuclear
Huimin Zhong, Cong Jiang, Jiahui Zou, Guancheng Zhu, Yanyan Huang
Summary: In this study, CeO2-based porous carbonaceous frameworks (CeO2 PCFs) were used as antioxidant nanozymes to scavenge reactive oxygen species and absorb benzo[a]pyrene. CeO2 PCFs exhibited excellent superoxide dismutase-like and catalase-like activity, effectively eliminating superoxide radical, hydroxyl radical, and hydrogen peroxide. The 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) free radical scavenging assay confirmed the free radical scavenging ability of CeO2 PCFs. Furthermore, CeO2 PCFs with large surface area and porous structure efficiently adsorbed benzo[a]pyrene. The designed CeO2 PCFs can serve as new antioxidant nanozymes for scavenging reactive oxygen species and adsorbing polycyclic aromatic hydrocarbons (PAHs).
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Environmental
Ki Jeon Nam, Qian Li, Sung Ku Heo, Shahzeb Tariq, Jorge Loy-Benitez, Tae Yong Woo, Chang Kyoo Yoo
Summary: This study assesses the potential risks posed by PAHs using climate change scenarios based on deep learning, and a multimedia fugacity model was employed to describe the future fate of PAHs. The assessment indicates that cancer risks would increase by more than 50%, exceeding the lower risk threshold in the southern and western regions. Developing PAH regulatory policies highlighted the necessity of increasing PAHs monitoring stations and controlling fossil fuel usage based on the domestic and global conditions under climate change scenarios.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Jinmu Luo, Yunman Han, Yuan Zhao, Yufei Huang, Xinrui Liu, Shu Tao, Junfeng Liu, Tao Huang, Linfei Wang, Kaijie Chen, Jianmin Ma
ENVIRONMENTAL POLLUTION
(2020)
Article
Environmental Sciences
Jinmu Luo, Yunman Han, Yuan Zhao, Xinrui Liu, Yufei Huang, Linfei Wang, Kaijie Chen, Shu Tao, Junfeng Liu, Jianmin Ma
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Xinrui Liu, Xiaodong Zhang, Yufei Huang, Kaijie Chen, Linfei Wang, Jianmin Ma, Tao Huang, Yuan Zhao, Hong Gao, Shu Tao, Junfeng Liu, Xiaohu Jian, Jinmu Luo
Summary: The study shows that the direct radiative forcing (DRF) of agriculture-emitted BC associated with the Green Revolution in India has significantly increased since the onset of the revolution, especially in the post-revolution period. This highlights the importance of emission mitigation from agricultural sources in reducing the impact of BC emissions on climate change.
Article
Environmental Sciences
Yuan Zhao, Li Wang, Tao Huang, Shu Tao, Junfeng Liu, Hong Gao, Jinmu Luo, Yufei Huang, Xinrui Liu, Kaijie Chen, Linfei Wang, Jianmin Ma
Summary: The Chinese government's lockdown measures significantly affected emissions of atmospheric pollutants, researchers used an unsupervised learning algorithm to study the impact of COVID-19 on PM2.5 levels. The rate of decrease in PM2.5 was 3.5 times faster in northern China compared to southern China, with southern China experiencing a 3.5 times decrease in PM2.5 levels compared to the north.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Min Wu, Jinmu Luo, Tao Huang, Lulu Lian, Tianlei Chen, Shijie Song, Zhanxiang Wang, Shuxin Ma, Chaoran Xie, Yuan Zhao, Xiaoxuan Mao, Hong Gao, Jianmin Ma
Summary: Vegetation burning caused by wildfires can release significant quantities of aerosols and toxic chemicals, posing health risks. BaP, the most toxic congener of PAHs, emitted from African wildfires has increased and contributed to global pollution, primarily from anthropogenic sources. High emissions and concentrations of BaP were identified in sub-Saharan Africa, potentially posing health risks. African BaP emissions from wildfires can contaminate Europe and other regions depending on atmospheric pathways.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Xiaohu Jian, Xiaodong Zhang, Yijie Liu, Xinrui Liu, Kaijie Chen, Linfei Wang, Jixiang Li, Yuan Zhao, Jinmu Luo, Ruiyu Zhugu, Jianmin Ma
Summary: The estimate of radiative forcing induced by land-use change is still uncertain due to the lack of reliable data with high spatiotemporal resolution. By comparing high and low resolution data sets, it was found that the updated data set reduces negative radiative forcing and indicates higher radiative forcing and more substantial warming.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Green & Sustainable Science & Technology
Shijie Song, Boqi Chen, Tao Huang, Shuxin Ma, Luqian Liu, Jinmu Luo, Huizhong Shen, Jiaxin Wang, Liang Guo, Min Wu, Xiaoxuan Mao, Yuan Zhao, Hong Gao, Jianmin Ma
Summary: This study estimated the global emissions of benzo[a]pyrene (BaP) from forest and grassland fires from 2001 to 2020 and simulated the contributions of wildfire-induced BaP emissions to BaP contamination in the Arctic. The results showed that global wildfires contributed 29.3% to annual averaging BaP concentrations in the Arctic and that wildfires significantly enhanced BaP concentrations in the Arctic after 2011. The study also identified local wildfire biomass emissions as the largest source of BaP in the Arctic, followed by emissions from Northern Asia and Northern North America.
ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
(2022)