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
Engineering, Environmental
Peng-Tuan Hu, Dong-Hai Liu, Zhi-Guo Cao, Hong Wei, Fu-Jie Zhu, Wan-Li Ma, Zi-Feng Zhang, Li-Yan Liu, Jing-Lan Feng, Yong-Feng Li, Yu-Fei Li, Yi-Fan Li
Summary: For decades, the floating catkins produced by willow and poplar trees have been criticized for spreading germs and causing fires. A research project conducted in Harbin, China investigated whether and how willow catkins could adsorb atmospheric polycyclic aromatic hydrocarbons (PAHs). The results revealed that both airborne and ground catkins preferred to adsorb gaseous PAHs rather than particulate PAHs. The removal loading of atmospheric PAHs by catkins in Harbin was estimated to be 1.03 kg/year.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Yan Li, Ning Li, Xiangling Zhang, Ke Liu, Zhenyi Jia, Genmei Wang
Summary: PAHs, particularly in lake sediments, pose a significant threat to human health and ecological security due to their persistence and high toxicity. The improved PMF-PC model showed high accuracy in numerical simulation and spatial distribution consistency of PAHs compared to existing receptor models. The contributions of different sources to PAHs in Taihu Lake sediments were determined, with fossil fuel sources being more concentrated near the shore.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(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
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
Environmental Sciences
Kazuichi Hayakawa, Ning Tang, Atsushi Matsuki, Yayoi Inomata, Akira Toriba, Edward G. Nagato
Summary: A method was proposed to calculate source contributions to atmospheric PAHs and NPAHs, distinguishing between high and low temperature combustion sources, providing greater clarity on source identification.
Article
Biochemistry & Molecular Biology
Tatiana D. Silva, Celia Alves, Helena Oliveira, Iola F. Duarte
Summary: This study comprehensively characterized PM10 from residential and traffic-impacted areas in a Portuguese city and investigated its biological effects on lung epithelial cells. The results showed that PM10 extracts could induce cellular toxicity, oxidative stress, mitochondrial damage, and cell cycle arrest, as well as modulate intracellular metabolic processes. Interestingly, PM10 samples rich in toxic substances had a greater impact on cell metabolism.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
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
Carme Pacin, Javier Martinez-Abaigar, Encarnacion Nunez-Olivera, Jesus R. Aboal, Flavia De Nicola, J. Angel Fernandez
Summary: Testing the innovative and cost-effective Mosspheres as passive air samplers for monitoring and mapping polycyclic aromatic hydrocarbons (PAHs) proved their high sensitivity and suitability. The study detected low concentrations of PAHs, with only a few enriched points exceeding legal thresholds near industrial areas and busy roads. However, Mosspheres were able to detect spatial structure for several PAHs and construct high-resolution pollution maps, supporting their widespread application and potential inclusion in European Directives on air quality control.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Lizhi Wang, Wei Du, Xiao Yun, Yuanchen Chen, Xi Zhu, Huizhong Shen, Guofeng Shen, Junfeng Liu, Xuejun Wang, Shu Tao
Summary: A portable emission sampling system was used to measure the emission factors of 29 polycyclic aromatic hydrocarbons (PAHs) for five types of marine vessels. The EFs were higher for small fishing boats and lower for tug boats. Particulate-phase PAHs accounted for a significant proportion of the total emissions.
ENVIRONMENTAL POLLUTION
(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
Astronomy & Astrophysics
Congcong Zhang, Xiaoyi Hu, Yuanyuan Yang, Yang Chen, Junfeng Zhen, Liping Qin
Summary: This study investigates the gas-phase hydrogen/deuterium exchange on large cationic polycyclic aromatic hydrocarbons (PAHs) through ion-molecule collision reactions. The results show the efficient formation of deuterated PAH cations and confirm the competition between deuteration and dedeuteration. A kinetic model is constructed to simulate the reaction processes under astrophysical conditions, suggesting that deuterated cationic PAHs are scarce in the interstellar medium.
ASTROPHYSICAL JOURNAL
(2022)
Article
Environmental Sciences
Linxuan Li, Yuan Cheng, Qili Dai, Baoshuang Liu, Jianhui Wu, Xiaohui Bi, Tong-Hyok Choe, Yinchang Feng
Summary: Chinese residential cooking emissions contain a diverse range of organic species that pose potential health risks, especially during grilling. Additional research and control measures are needed to reduce indoor air pollution and protect human health.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Environmental Sciences
Quang Tran Vuong, Phan Quang Thang, Takeshi Ohura, Sung-Deuk Choi
ATMOSPHERIC ENVIRONMENT
(2020)
Review
Biotechnology & Applied Microbiology
Quang Tran Vuong, Phan Quang Thang, Takeshi Ohura, Sung-Deuk Choi
REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY
(2020)
Article
Environmental Sciences
Kento Sei, Qi Wang, Masahiro Tokumura, Yuichi Miyake, Takashi Amagai
Summary: This study evaluated three commercial analytical columns and optimized the analytical conditions for GC-MS/MS to improve the analysis of PAHs and XPAHs. The results showed that the Rxi-PAH column was the most suitable for analyzing PAHs and XPAHs. Optimization of analytical conditions for GC-MS/MS resulted in higher analytical sensitivity compared to the traditional method GC-HRMS.
Article
Environmental Sciences
Kento Sei, Qi Wang, Masahiro Tokumura, Anwar Hossain, Mohammad Raknuzzaman, Yuichi Miyake, Takashi Amagai
Summary: This study investigated the occurrence of PM2.5-bound PAHs and XPAHs in the atmospheres of Bangladesh and Japan, with findings showing significantly higher risks in Bangladesh than in Japan, highlighting the urgent need for comprehensive monitoring and control of atmospheric pollutants in heavily polluted regions.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Applied
Anura Upasanta-Kumara Wickrama-Arachchige, Keerthi S. Guruge, Yuriko Inagaki, Hinako Tani, Tilak Siri Dharmaratne, Yasuaki Niizuma, Takeshi Ohura
Summary: The study found that edible aquatic species from the Indian Ocean near Sri Lanka and the Pacific Ocean near Japan contained various harmful substances, with some risks of biomagnification in certain species. Chlorinated and brominated pyrene were the predominant components in most samples, and consumption of some aquatic organisms may lead to incremental lifetime cancer risks exceeding acceptable levels for Sri Lankans.
Article
Environmental Sciences
Keerthi S. Guruge, Yukino A. Tamamura, Prasun Goswami, Rumi Tanoue, K. B. S. N. Jinadasa, Kei Nomiyama, Takeshi Ohura, Tatsuya Kunisue, Shinsuke Tanabe, Masato Akiba
Summary: This study investigated the presence of antimicrobials, ARB, and ARGs in hospital wastewaters and surface waters. Results showed that certain resistant genes were associated with personal care products, and disparities were observed in the release of ARB and ARGs into downstream waters based on specific factors such as site, treatment, and year.
Article
Environmental Sciences
Yoko Kawatsu, Jamson Masih, Takeshi Ohura
Summary: This study investigated the presence of chlorinated and brominated polycyclic aromatic hydrocarbons in fine aerosol particulate matter in urban and suburban sites in Mumbai. The results showed that pollution levels were significantly higher in urban areas compared to suburban areas, with different sources of pollution between the two locations.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2022)
Article
Environmental Sciences
Qi Wang, Masahiro Tokumura, Yuichi Miyake, Takashi Amagai
Summary: This study conducted recovery tests to measure 46 VOCs in a commercial activated carbon-silica gel active sampler, finding that a solvent mixture of 80% acetone and 20% carbon disulfide was the most effective for extracting 87% of the targeted VOCs from the adsorbents.
AIR QUALITY ATMOSPHERE AND HEALTH
(2021)
Article
Environmental Sciences
Quang Tran Vuong, Ji-Min Son, Phan Quang Thang, Takeshi Ohura, Sung-Deuk Choi
Summary: This study proposed the GC-RT technique as an effective method to determine the physicochemical properties of polycyclic aromatic hydrocarbons and their derivatives. The technique provided data on octanol-air partition coefficients, sub-cooled liquid vapor pressures, internal energies of phase transfer, and enthalpies of vaporization for the compounds studied. The study also found that certain functional groups in the derivatives significantly increased the activity in octanol for the corresponding parent compounds.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Anura Upasanta-Kumara Wickrama-Arachchige, Keerthi S. Guruge, Hinako Tani, Tilak Siri Dharmaratne, Marappullige P. Kumara, Yasuaki Niizuma, Takeshi Ohura
Summary: This study investigated 36 elements in 29 different edible aquatic species in Sri Lanka and categorized them based on their toxicity and intake levels. The study found that some elements had a negative correlation with trophic levels in the ecosystems, while others had a positive correlation. Some organisms exceeded the maximum allowable limit for certain elements. For the widely consumed yellowfin tuna, the risk index was below the recommended limit, indicating that consumption of yellowfin tuna does not pose a health risk to Sri Lankan adults.
Article
Environmental Sciences
Prasun Goswami, Anura Upasanta-Kumara Wickrama-Arachchige, Momoka Yamada, Takeshi Ohura, Keerthi S. Guruge
Summary: Recent studies have found the presence of halogenated derivatives of PAHs in dairy products, which may pose a risk to human health. This study analyzed milk and creaming powder samples from Sri Lanka and Japan and identified several halogenated PAHs. The findings suggest that HPAHs may have additive effects on the PAHs-associated health risk to humans.
Article
Environmental Sciences
Yuki Imai, Fumikazu Ikemori, Yuri Yoshino, Takeshi Ohura
Summary: This study investigates the occurrence of Chlorinated polycyclic aromatic hydrocarbons (ClPAHs) in different size-segregated particles and evaluates their sources and factors affecting the concentrations using source tracers. The results show that ClPAHs are mainly found in the finest particles, similar to other pollutants such as PAHs, hopanes, and levoglucosan. The concentrations of ClPAHs are significantly correlated with total PAHs and specific hopanes, suggesting industrial activities and vehicular emissions as the dominant sources.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Water Resources
Andre Freire Cruz, R. G. S. Wijesekara, K. B. S. N. Jinadasa, Benjamin J. Gonzales, Takeshi Ohura, Keerthi S. Guruge
Summary: The study investigated the composition and richness of bacterial communities in different water sources in Sri Lanka and the Philippines, showing significant differences between hospital wastewater, fish farming sites, and sewage effluents. The results suggest that water sources have a strong influence on bacterial community composition and richness.
FRONTIERS IN WATER
(2021)
Article
Biochemistry & Molecular Biology
Chihiro Imaeda, Yasuaki Niizuma, Takeshi Ohura
Summary: This study investigated the potential of using swallow feces as a bioindicator to evaluate soil pollution from anthropogenic sources. The analysis found consistent concentrations of trace elements and similar compositions of pollutants between soil and fecal samples, but differences in the sources and metabolic pathways of PAHs and ClPAHs in swallows. Predictions based on partial least squares analysis showed significant correlations in contaminant levels between soil and fecal samples.
ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY
(2021)
Article
Food Science & Technology
Kento Sei, Qi Wang, Masahiro Tokumura, Shinji Suzuki, Yuichi Miyake, Takashi Amagai
Summary: This study investigated the levels of PAHs and XPAHs in smoke-dried bonito purchased in the Japanese market in 2020. The total concentrations of PAHs were found to be relatively high, while those of XPAHs were lower. Due to the low consumption of smoke-dried bonito, the incremental lifetime cancer risk of PAH4 from dietary consumption of this product was the lowest compared to other smoked foods.
ACS FOOD SCIENCE & TECHNOLOGY
(2021)
