Article
Environmental Sciences
Agnieszka Krzyszczak, Michal P. Dybowski, Magdalena Konczak, Bozena Czech
Summary: In recent years, there has been significant progress in the study of thermal transformation of waste into valuable materials such as biochar. High-temperature processes can lead to the formation of toxic polycyclic aromatic hydrocarbons (PAHs). However, the pyrolysis process can also result in the formation of derivatives containing oxygen, nitrogen, or sulfur, which may have higher toxicity than parent PAHs. The bioavailability of PAHs is an important parameter in the agricultural application of carbonaceous materials.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Natasha Klasios, Hannah De Frond, Ezra Miller, Meg Sedlak, Chelsea M. Rochman
Summary: The study found microplastics and other anthropogenic microparticles in bivalves from San Francisco Bay, with significant variations in abundance between different sites, and no correlation between the number of microparticles and PAH concentrations. Bivalves may be suitable as bioindicators for microplastic levels in sediment, but not in surface water.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Applied
Gizem Goker, Sezer Kiralan, Aziz Tekin, Ferruh Erdogdu
Summary: The study found that the formation of PAHs in olive pomace during drying is influenced by temperature and time, with the total PAH formation rate increasing with temperature. The activation energy and frequency factor values also increase as temperature rises.
Review
Environmental Sciences
A. Berthiaume, E. Galarneau, G. Marson
Summary: This article presents the current knowledge on Canadian PAC emission sources, with forest fires dominating the emissions nationally. Non-industrial sources are estimated to be the second largest contributor, showing moderate decreases in recent decades. Industrial point sources have seen considerable reductions, while fugitive emissions from other industrial sources remain a gap in our understanding. Overall, there is uncertainty in emissions data and regional/local scale examination is needed to determine the sources contributing most to human and ecosystem exposure.
ENVIRONMENTAL POLLUTION
(2021)
Article
Multidisciplinary Sciences
Wei Jin, Yuan Li, Li Lu, Dong Zhang, Shanying He, Jiali Shentu, Qiwei Chai, Lei Huang
Summary: The comprehensive water quality index (CWQI) is a mathematical statistic that reflects the pollution status of rivers based on several water quality indicators. This study established a CWQI for a typical river in eastern China, using 1-year monitoring data from 20 sampling sets. The predicted CWQI for each monitoring section indicates that most sections are moderately polluted, with some sections being seriously polluted. The analysis shows that TN, n-ary sumation PAHs, and n-ary sumation n-Alks are the main factors influencing water quality, particularly due to the impact of petroleum hydrocarbons in the middle and lower reaches.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Jennifer L. A. Keir, William Papas, Adam Wawrzynczak, Rocio Aranda-Rodriguez, Jules M. Blais, Paul A. White
Summary: This study evaluated the use of silicone wristbands as passive samplers to assess firefighters' exposures to polycyclic aromatic hydrocarbons (PAHs) during firefighting. The results showed that silicone wristbands could accurately capture exposures to various PAHs, but their effectiveness may be influenced by short sampling time, high temperatures, and high turbulence.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Tao Wang, Kai Xiang, Yuan Zeng, Haifeng Gu, Yufeng Guan, Shejun Chen
Summary: A study conducted in a subtropical rainforest in southern China found that forest canopies play a crucial role in scavenging airborne semi-volatile organic compounds. The study measured polycyclic aromatic hydrocarbons (PAHs) in the understory air, foliage, and litterfall, revealing spatial and temporal variations in PAH concentrations. The research provides important insights into the degradation and accumulation dynamics of PAHs in subtropical rainforests.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Amber L. Kramer, Shelby Dorn, Allison Perez, Courtney Roper, Ivan A. Titaley, Kaylee Cayton, Ronald P. Cook, Paul H-Y Cheong, Staci L. Massey Simonich
Summary: This study measured the oxidative potential of 135 individual PAHs in PM2.5 and found a mismatch between DTT50 results and computed reduction potential values. The GINI equality index correlated with Delta G(rxn) values, indicating a link between electron dispersion and thermodynamic reactions in PAHs. The additive prediction model did not accurately predict the DTT consumption in the assay, suggesting a more complex toxicity model for PAHs in ambient PM2.5.
ENVIRONMENTAL POLLUTION
(2021)
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
Environmental Sciences
Li-Ping Tao, Xue Li, Ming-Zhu Zhao, Jing-Ru Shi, Si-Qi Ji, Wen-Yuan Jiang, Qiu-Ju Liang, Yu-Hang Lei, Yi-Yao Zhou, Rong Cheng, Zhe Shi, Wenhai Deng, Jiayin Zhu, Shu-Yun Zhang
Summary: Polycyclic aromatic hydrocarbons (PAHs), particularly chrysene, have toxic effects on the liver by increasing relative liver weight and elevated serum ALT levels; the hepatotoxicity of chrysene is dependent on the aryl hydrocarbon receptor (AhR), while Nrf2 plays a crucial role in protecting against oxidative liver injury induced by chrysene.
Article
Environmental Sciences
Gonasageran Naidoo, Krishnaveni Naidoo
Summary: The study found that different salinities and oil combinations affect mangrove growth, with increased salinity slowing growth and the combination of salinity and oil exacerbating growth reduction. In A. marina, oil absorption and translocation disrupted leaf membranes, ion accumulation, and salt secretion.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Public, Environmental & Occupational Health
Andrew P. W. Banks, Phong Thai, Michelle Engelsman, Xianyu Wang, Andres F. Osorio, Jochen F. Mueller
Summary: Firefighters are exposed to a variety of chemicals, including PAHs, when attending fire scenes. Exposure to PAHs was higher in particleboard fires compared to diesel pan fires. Urinary OH-PAH metabolites can be used to observe PAH exposure in compartment burns with high concentrations of PAHs, such as in particleboard fires. Overall, urinary OH-PAH concentrations were relatively low considering the potential exposure in these burns, suggesting that protective equipment and decontamination measures are effective in controlling exposure.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2021)
Article
Environmental Sciences
Ulrika Eriksson, Ivan A. Titaley, Magnus Engwall, Maria Larsson
Summary: Tire granulates recovered from end-of-life tires contain a complex mixture of toxic polyaromatic compounds (PACs), which are only partially monitored. This study used chemical analysis and bioassays to determine PAC concentrations and activities in tire granulates, revealing the presence of unknown bioactive compounds that contribute significantly to the effects observed. Further investigations are needed to identify and apportion these toxicants.
Article
Environmental Sciences
Bo Fang, Mercedes A. Bravo, Hong Wang, Lulu Sheng, Wenyi Wu, Yuanke Zhou, Xuan Xi, Truls ostbye, Qin Liu
Summary: This study found that PAH exposures may delay puberty timing in girls. Specific urinary PAH metabolite concentrations were significantly associated with delayed breast development, pubic hair development, and axillary hair development.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zheng Liu, Yuxin Sun, Yuan Zeng, Yufeng Guan, Yuqi Huang, Yuping Chen, Daning Li, Ling Mo, Shejun Chen, Bixian Mai
Summary: Measurements of hazardous semi-volatile organic compounds (SVOCs) in fine particulate matter (PM2.5) at Yongxing Island in the South China Sea showed low concentrations of polycyclic aromatic compounds (PACs), largely influenced by Southeast Asian countries and southern China. The atmospheric loss of SVOCs and enhanced formation of N/OPAHs from tropical regions were significant factors for the low PAC concentrations. Enhanced atmospheric reactions and insignificant local sources were further indicated through results and correlation analyses.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Laxmi Singh, Madhu Anand, Saroj Singh, Ajay Taneja
DRUG AND CHEMICAL TOXICOLOGY
(2020)
Article
Environmental Sciences
M. Anand, A. Taneja
ENVIRONMENTAL RESEARCH
(2020)
Article
Environmental Sciences
Balasubramanian Prithiviraj, Ajay Taneja, Paromita Chakraborty
Summary: Recent study in Agra, a non-metropolitan city in northern India, monitored atmospheric PCBs and found higher concentrations in summer compared to winter, with urban areas being the main source in summer and rural areas in winter. The analysis identified open burning as the major source of atmospheric PCBs, contributing to 80% of the total, while atmospheric transport, petrogenic combustion, and biomass burning accounted for the remaining 20%. The levels observed in the study were within the public health guidelines for inhalation unit risk and the United States Environmental Protection Agency's regional screening level high risk tier for ambient air.
Article
Environmental Sciences
Himanshi Rohra, Atar S. Pipal, Rahul Tiwari, Pawan Vats, Jamson Masih, Puja Khare, Ajay Taneja
Article
Chemistry, Multidisciplinary
Priyanka Agarwal, Madhu Anand, Paromita Chakraborty, Laxmi Singh, Jamson Masih, Ajay Taneja
Summary: This study aimed to explore the association between in-utero exposure to polycyclic aromatic hydrocarbons (PAHs) and infant birth weight. The results showed the presence of various PAHs in placental tissue, with pyrogenic PAHs being the predominant source of exposure in the studied population. Regression analysis revealed an inverse correlation between certain PAHs and birth weight, and a significant association between fluoranthene and the depletion trend of birth weight.
DRUG AND CHEMICAL TOXICOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Akshay Botle, Rakesh Kumar Singhal, Hirakendu Basu, V Manisha, Jamson Masih
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2020)
Article
Environmental Sciences
Disha Mishra, Ranu Yadav, Raghvendra Pratap Singh, Ajay Taneja, Rahul Tiwari, Puja Khare
Summary: This study focused on the preparation of lemongrass essential oil loaded chitosan and cellulose nanofibers composites for controlling indoor air bioaerosols. The composite system showed high encapsulation efficiency and citrals content, resulting in a significant reduction in culturable bacteria in indoor air aerosols. The diffusion of aroma molecules in indoor air enhanced the production of ROS, leading to the loss of membrane integrity of bacterial cells, indicating the potential of this composite system for controlling bacteria in respirable bioaerosols.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Atar Singh Pipal, Himanshi Rohra, Rahul Tiwari, Ajay Taneja
Summary: FESEMEDX was used for morphological characterization and elemental microanalysis of individual particles, revealing a bimodal size distribution between 0.2 and 1.0 μm. Parameter values such as circularity and aspect ratio indicated that particles were not perfectly spherical, and showed deviation from spherical to non-spherical shapes. Particles with higher area equivalent diameter were found to be more elongated in nature, with variations in elemental composition observed in different size ranges.
ATMOSPHERIC POLLUTION RESEARCH
(2021)
Article
Multidisciplinary Sciences
Stuti Dubey, Himanshi Rohra, Ajay Taneja
Summary: The study evaluated the effectiveness of two types of air purifiers equipped with High-Efficiency Particulate Air (HEPA) filters in reducing particulate matter (PM) and ion concentrations in a real-world indoor environment. Mechanical HEPA filters were found to be more effective in reducing PM and ion concentrations compared to ion-releasing air purifiers.
Article
Polymer Science
Ritwika Roy, Rohi Jan, Uttara Joshi, B. Rajiv, Ajay Taneja, P. Gursumeeran Satsangi
Summary: This study developed biopolymer-based composite nano-fibers with montmorillonite-clay mineral as nano-filler for mitigating airborne microbes. The results showed that these fibers had potential antimicrobial properties, biocompatibility, and controlled porous structure, making them suitable for air-filtration applications.
JOURNAL OF POLYMER RESEARCH
(2022)
Editorial Material
Environmental Sciences
Himanshi Rohra, Atar Singh Pipal, P. G. Satsangi, Ajay Taneja
Summary: This paper reviews the origin and development of atmospheric particle science and discusses its connection with the COVID-19 pandemic. The article emphasizes the increasing importance of applying unmet concepts and future research methods in particle science due to the growing interest in this field.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Kalpana Rajouriya, Ajay Taneja
Summary: Real-time monitoring of size-segregated particulate matter (PM) was conducted in the glass industrial city Firozabad using a portable aerosol spectrometer. The study found that the concentrations of PM10 and PM2.5 exceeded air quality standards and guidelines. Furthermore, children in both urban and rural areas were highly affected by lung diseases due to the deposition of PM in the head and tracheobronchial regions.
AIR QUALITY ATMOSPHERE AND HEALTH
(2023)
Article
Multidisciplinary Sciences
Jamson Masih, Ashwati Nair, Sneha Gautam, Rakesh Kumar Singhal, Hirakendu Basu, Swathi Dyavarchetty, Ashish Uzgare, Rahul Tiwari, Ajay Taneja
SN APPLIED SCIENCES
(2019)
