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
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
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
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
Lei Zhang, Minghui Wang, Haiyang Cui, Jie Qiao, Dongsheng Guo, Biao Wang, Xiujuan Li, He Huang
Summary: The study demonstrates that humic acid (HA) or Tween80 can significantly enhance the degradation efficiency of phenanthrene (PHE) by B. subtilis ZL09-26, by jointly regulating specific cellular pathways and increasing metabolic pathways, thereby improving PHE transport, emulsification, and degradation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Plant Sciences
Gonasageran Naidoo, Krishnaveni Naidoo
Article
Plant Sciences
C. E. Martin, G. Naidoo
SOUTH AFRICAN JOURNAL OF BOTANY
(2018)
Article
Environmental Sciences
Gonasageran Naidoo, Krishnaveni Naidoo
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2018)
Article
Plant Sciences
G. Naidoo, K. K. Naidoo
Article
Environmental Sciences
Dimitri Veldkornet, Anusha Rajkaran, Swapan Paul, Gonasageran Naidoo
MARINE POLLUTION BULLETIN
(2020)
Article
Ecology
Gonasageran Naidoo
Summary: This study compared the responses of Phragmites mauritianus and P. australis to waterlogging stress, finding that P. australis has a competitive edge over P. mauritianus under waterlogged conditions.
AFRICAN JOURNAL OF ECOLOGY
(2021)
Article
Ecology
Gonasageran Naidoo
Summary: The growth of P. australis was significantly reduced in high salinity conditions, as evidenced by decreased plant height, biomass, photosynthesis, and CO2 exchange. While the plant showed tolerance to increasing salinity, its growth and productivity were significantly reduced.
AFRICAN JOURNAL OF ECOLOGY
(2021)
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
Plant Sciences
Lindokuhle Tshapa, Kuben Naidoo, Gonasageran Naidoo
Summary: The study compared morphological and physiological responses of Arundo donax and Phragmites australis grown in different soil moisture regimes. Both species showed reduced growth and root length under prolonged complete flooding, but exhibited higher photosynthetic rates in Arundo donax. Phragmites australis demonstrated higher tolerance to waterlogging stress compared to Arundo donax.
Article
Ecology
Kubendran Kista Naidoo, Gonasageran Naidoo
Summary: This study examined the role of photosynthetic characteristics in the success and spread of the invasive weed Chromolaena odorata. The results showed that this weed exhibits efficient light utilization and effective photoprotective mechanisms, enabling it to maximize carbon gain and gain a competitive advantage over other species.
AFRICAN JOURNAL OF ECOLOGY
(2023)
Review
Environmental Sciences
Gonasageran Naidoo
Summary: This review provides an overview of the importance, distribution, and ecosystem services of mangroves in Africa, as well as discussing the threats they face from human and natural factors. It also offers recommendations for the management and conservation of mangroves in each country.
MARINE POLLUTION BULLETIN
(2023)
Article
Plant Sciences
Danesha Naidoo, Yougasphree Naidoo, Gonasageran Naidoo, Farzad Kianersi, Yaser Hassan Dewir
Summary: Croton gratissimus (Lavender croton) has three distinct secretory structures, which include lepidote and glandular trichomes, and non-articulated unbranched laticifers. These structures produce secondary metabolites such as alkaloids, phenolic compounds, and lipids, which could potentially be used in traditional medicine.
Article
Water Resources
L. P. Tshapa, G. Naidoo, Sershen, K. K. Naidoo
Summary: This study investigated the addition of yeast to greywater for irrigation purposes and its effects on lettuce and maize. The results showed that yeast treatment improved seed germination and growth in soil conditions, leading to increased biomass and photosynthetic efficiency. Tapwater was more effective than greywater in promoting plant growth. This innovative approach has the potential to enhance water and food security for subsistence farmers.
Article
Plant Sciences
Y. Naidoo, C. T. Sadashiva, G. Naidoo
BANGLADESH JOURNAL OF BOTANY
(2018)
Article
Ecology
Gonasageran Naidoo
AFRICAN JOURNAL OF ECOLOGY
(2018)
Article
Environmental Sciences
Atefeh Zendehboudi, Azam Mohammadi, Sina Dobaradaran, Gabriel E. De-la-Torre, Bahman Ramavandi, Seyed Enayat Hashemi, Reza Saeedi, Emran Moradpour Tayebi, Ahmad Vafaee, Amirhossein Darabi
Summary: This study investigated the characteristics and ecological risks of microplastics (MPs) in ballast water for the first time, and found high levels of MP pollution. These findings contribute to our understanding of the sources and risks of microplastics in marine ecosystems.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Rose Boahemaa Pinto, Linda Bogerd, Martine van der Ploeg, Kwame Duah, Remko Uijlenhoet, Tim H. M. van Emmerik
Summary: Catchment-scale plastic pollution assessments provide insights into the sources, sinks, and pathways of plastic pollution. We propose an approach to quantify macroplastic transport and density in the Odaw catchment, Ghana, and find that the urban riverine zone has the highest transport, while the urban tidal zone has the highest riverbank and land macroplastic density.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Aliya Baidourela, Qian Sun, Gongxin Yang, Umut Halik, Zhongkai Dong, Kaixu Cai, Guili Sun, Wenya Zhang, Sisi Cheng
Summary: The study focused on heavy metal pollution in the green vegetation of a suburban industrial area in Tuokexun County, Xinjiang, China. The results showed that the overall level of heavy metal pollution in the soil was minor, with mercury (Hg) being the most severe contamination, likely caused by human activities. The composition of heavy metal elements in trees was more stable compared to grass and shrubs, with varying concentrations across different vegetation. Shrubbery was found to be the most effective in heavy metal restoration, and there were disparities in heavy metal enrichment among different vegetation types.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
James H. Bridson, Hayden Masterton, Beatrix Theobald, Regis Risani, Fraser Doake, Jessica A. Wallbank, Stefan D. M. Maday, Gavin Lear, Robert Abbel, Dawn A. Smith, Joanne M. Kingsbury, Olga Pantos, Grant L. Northcott, Sally Gaw
Summary: Plastic pollution has significant environmental impacts, largely due to chemical additives. However, the behavior of plastic additives in marine environments is not well understood. A marine deployment experiment was conducted to investigate the effects of weathering on the extractables profile of four types of plastics in New Zealand over a period of nine months. The concentration of additives in polyethylene and oxo-degradable polyethylene was strongly influenced by artificial weathering, while polyamide 6 and polyethylene terephthalate showed minimal change. These findings emphasize the importance of considering leaching and weathering effects on plastic composition when assessing the potential impact and risk of plastic pollution in receiving environments.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Alan G. Scarlett, Francis D. Spilsbury, Steven J. Rowland, Marthe Monique Gagnon, Kliti Grice
Summary: This study used diamondoid hydrocarbon distributions to identify the sources of environmental oil contamination. A suite of 20 diamondoids was found to accumulate in fish adipose tissue. The scatter plots of indices between fish and exposure oils showed a close to ideal 1:1 relationship, which can be used to determine the origin of the oil.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Shan Jiang, Mengmeng Wan, Kun Lin, Yanshan Chen, Rui Wang, Liju Tan, Jiangtao Wang
Summary: In this study, the concentration, composition, distribution, and sources of PCBs in surface seawater of the Bohai Bay were analyzed. The results showed that PCBs in the Bohai Bay had high concentrations and were primarily derived from land-based sources such as port activities and river inputs. The PCBs in the Bohai Bay may come from commercial PCBs and their incineration products, municipal landfills, wood and coal combustion, and industrial activities, etc.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Icaro S. A. Porto, Saulo V. A. Dantas, Caio S. A. Felix, Francisco A. S. Cunha, Jailson B. de Andrade, Sergio L. C. Ferreira
Summary: This study evaluated the risks of mercury levels in sardines consumed by low-income population in Salvador, Brazil. The results showed that the mercury content in the sampled sardines posed no risks to human health. This study is significant as most sardines in Salvador come from Todos os Santos Bay, which has a history of mercury contamination.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Jiahui Chen, Chengyu Yuan, Guanqun Zhai, Guangcheng Chen, Heng Zhu, Jun Liu, Yong Ye
Summary: This study investigated the combined influences of species selection and site elevation on greenhouse gas fluxes from restored mangrove soils. The results suggest that Avicennia marina should be selected for mangrove restoration to minimize carbon release and reduce the influence of greenhouse gas fluxes on the global greenhouse effect.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Emmanuel Onyeabor, Uju Obuka
Summary: The Gulf of Guinea region in Africa is a significant area for coastal countries, playing a vital role in their economic and environmental development. This study aims to reduce marine plastic pollution in the region by utilizing legal instruments.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Yuanli Liu, Stephan Luttjohann, Alvise Vianello, Claudia Lorenz, Fan Liu, Jes Vollertsen
Summary: Large area attenuated total reflectance-Fourier transform infrared spectroscopy (LAATR-FTIR) is a novel technique for detecting small microplastics, with limited accuracy for large microplastics. However, it shows promise in homogeneous matrices. The spectra quality is comparable between transmission mode and LAATR mode.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Phuc T. D. Le, Andrew M. Fischer, Britta D. Hardesty, Heidi J. Auman, Chris Wilcox
Summary: This study explores the relationship between ocean currents and the accumulation of floating marine debris (FMD) and finds that higher concentrations of FMD are associated with frontal frequencies (FF). FMD is primarily trapped in accumulation zones between fronts and the coastline, which have high biodiversity value.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Rosa Sawan, Perine Doyen, Florence Viudes, Rachid Amara, Celine Mahfouz
Summary: Few studies have examined the impact of urbanization and meteorological events on microplastics discharged into the sea through rivers. Surface water samples were collected from two Lebanese rivers, with differing degrees of urbanization, during dry and wet periods. The results showed that the most industrialized river had a significantly higher abundance of microplastics compared to the less-industrialized river. There was also a correlation between particle contamination and the season at each site, with microplastic concentrations highest on the first day of the wet season. These findings highlight the importance of considering meteorological events in accurately assessing plastic pollution influx into coastal waters.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Katherine R. Shaw, Jonathan L. Whitney, Eileen M. Nalley, Madeline C. Schmidbauer, Megan J. Donahue, Jesse Black, Raquel N. Corniuk, Kellie Teague, Rachel Sandquist, Catherine Pirkle, Rachel Dacks, Max Sudnovsky, Jennifer M. Lynch
Summary: This study examines the ingestion of plastic in reef fish in the Republic of the Marshall Islands. Plastic particles were found in the gastrointestinal tracts of multiple fish species. However, further analysis revealed that these particles were actually natural materials and posed no threat to human consumers.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Revati Hardikar, C. K. Haridevi, Shantaj Deshbhratar
Summary: This study investigated the variability in phytoplankton functional structure using a trait-based approach and explored the relationship between species traits and environmental factors, as well as their impact on ecosystem functioning. The results revealed that morphological traits, temperature, and ammonia played a decisive role in the seasonal succession of phytoplankton species. It was found that certain traits favored higher biomass production but might hinder energy transfer efficiency. The strong correlation between environmental variables and phytoplankton functional structure supports the practical implementation of a trait-based approach in studying phytoplankton community dynamics under different environmental conditions.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Engki A. Kisnarti, Nining Sari Ningsih, Mutiara R. Putri, Nani Hendiarti, Bernhard Mayer
Summary: This study examines the movement patterns of plastic marine debris in Indonesian waters, revealing that Indonesia contributes significantly to transboundary marine debris in the Pacific Ocean, Indian Ocean, and the South China Sea. Most of the debris remains in Indonesian waters and moves back and forth due to the influence of monsoon currents.
MARINE POLLUTION BULLETIN
(2024)