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
Environmental Sciences
Punniyakotti Parthipan, Liang Cheng, Perumal Dhandapani, Punniyakotti Elumalai, Mingzhi Huang, Aruliah Rajasekar
Summary: In this study, the degradation efficiency of mixed PAHs, especially anthracene, pyrene, and benzo(a)pyrene, was enhanced by using a biosurfactant and iron nanoparticles. The biosurfactant increased the bioavailability of PAHs in the aqueous environment, promoting bacterial settlement and growth. Iron nanoparticles increased bacterial biomass and PAHs adsorption, facilitating PAHs utilization by the bacterial consortia.
ENVIRONMENTAL POLLUTION
(2022)
Article
Chemistry, Multidisciplinary
Sasan Jahanshahi, Leila Badiefar, Mahvash Khodabandeh, Mohammad Ali Heidarnia, Bagher Yakhchali
Summary: A novel indigenous halotolerant strain, Pseudomonas sp, isolated from petrochemical wastewater in Iran, showed high potential for bisphenol A (BPA) biodegradation. This strain could efficiently degrade BPA at optimal temperature and pH conditions, and also degrade phenol and BPA in salty petrochemical wastewater. Analysis of intermediate metabolites during BPA degradation revealed a possible degradation pathway. Genetic analysis identified the strain as Pseudomonas pseudoalcaligenes.
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
Engineering, Environmental
Zhongping Sun, Li Wang, Sucai Yang, Yanping Xun, Tengfei Zhang, Wenxia Wei
Summary: This study investigated the thermally enhanced anoxic biodegradation of PAHs in subsurface soil and found that temperature positively affected bacterial abundance and PAHs removal rates, with higher temperatures leading to increased degradation rates of three- and four-ring PAHs compared to five- and six-ring PAHs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
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
Chemistry, Multidisciplinary
Jingnan Jin, Yahui Shi, Baozhong Zhang, Dongjin Wan, Qingye Zhang, Ying Li
Summary: In this study, a BaP-degrading strain Pannonibacter sp. JPA3 was isolated from oil well production water, which could remove 80% of BaP at an initial concentration of 100 mg L-1 after 35 days of culture. The metabolites BaP-4,5-dihydrodiol, BaP-4,5-epoxide, 5-hydroxychrysene, and 2-hydroxy-1-naphthoic acid were identified in the biodegradation process. A dioxygenase model was built and molecular docking was performed to investigate the interaction mechanism between BaP and dioxygenase. A hypothesis for the progressive degradation mechanism of BaP by this strain was proposed based on the identification of downstream metabolites. In conclusion, this study provided an efficient BaP degrader and a comprehensive reference for the study of degradation mechanisms at the molecular level.
Article
Environmental Sciences
Effrosyni Zafeiraki, Evangelos Moulas, Konstantinos M. Kasiotis, Evangelos Bakeas, Emmanouil Dassenakis
Summary: This study investigates the occurrence, distribution, sources, and ecotoxicological risk of polycyclic aromatic hydrocarbons (PAHs) in sediment samples collected from three areas along the Hellenic coastline. The results reveal that Piraeus harbor is the most contaminated area, followed by Saronikos Gulf and Heraklion. Most sampling sites show evidence of combustion as the source, with petroleum contamination also indicated in Piraeus harbor. Risk assessment indicates low or no adverse health effects for exposed biota in Saronikos Gulf and Heraklion, while BaP is identified as the main contributor to carcinogenic and mutagenic risk in Piraeus harbor.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Environmental
Huan Gao, Manli Wu, Heng Liu, Ting Zhang, Xuhong Zhang
Summary: The physicochemical responses of the PAH-degrading strain Pseudomonas aeruginosa (P. aeruginosa) G24 under PAHs stress were investigated. After 21 days of incubation, P. aeruginosa G24 achieved removal rates of 43.8% for phenanthrene (Phe) and 36.8% for pyrene (Pyr). The damages to P. aeruginosa G24 during PAH degradation included increased zeta potential and permeability on the bacterial surface, increased cell apoptosis, reduced EPS contents, as well as injured cell membrane structures.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
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.
Article
Public, Environmental & Occupational Health
Seth McCormick, John E. Snawder, I-Chen Chen, Jonathan Slone, Antonia M. Calafat, Yuesong Wang, Lei Meng, Marissa Alexander-Scott, Michael Breitenstein, Belinda Johnson, Juliana Meadows, Cheryl Fairfield Estill
Summary: This study investigated the occupational exposure levels of PAHs among RCTS workers, finding that their air and skin concentrations were significantly higher than previous levels for asphalt workers, further confirming the potential risks associated with PAH exposure.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2022)
Article
Marine & Freshwater Biology
Philip Tanabe, Constance A. Mitchell, Vanessa Cheng, Qiqing Chen, David C. Volz, Daniel Schlenk
Summary: Exposure to 2-hydroxychrysene at critical developmental time-points in medaka embryos led to a concentration-dependent decrease in hemoglobin and significant mortality, while exposure to 6-hydroxychrysene only resulted in a decrease in hemoglobin at the highest concentration. Liver development and function may play a role in the developmental toxicity of 2-hydroxychrysene during the sensitive window of 52-100 hours post-fertilization.
AQUATIC TOXICOLOGY
(2021)
Article
Engineering, Environmental
Darshita Ketan Pandya, Madhava Anil Kumar
Summary: PAHs are non-polar organic compounds omnipresent in the environment and released due to anthropogenic activities. The search for a technically feasible and cost-effective wastewater treatment is driven by stringent regulations and the need for sustainable development. Biological degradation, particularly biodegradation, is considered a potential remedial strategy for PAHs. The effectiveness of biological treatment is highly influenced by physio-chemical and environmental parameters, necessitating suitable optimization techniques for judicious functioning.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Microbiology
Feiyue Lou, Charles Obinwanne Okoye, Lu Gao, Huifang Jiang, Yanfang Wu, Yongli Wang, Xia Li, Jianxiong Jiang
Summary: This study conducted whole-genome sequencing of two novel bacterial strains, Klebsiella michiganensis EF4 and K. oxytoca ETN19, to investigate their genomic functions and degradation pathways of phenanthrene and pyrene. The EF4 strain degraded approximately 80% of phenanthrene and 60% of pyrene after 28 days of cultivation. The combination of EF4 and ETN19 showed even higher phenanthrene degradation efficiency, following a first-level kinetic model with a half-life of approximately 6 days. The two bacterial genomes contained enzymes and gene clusters associated with PAHs degradation, as well as transcription factors that regulate the expression of PAHs degradation genes and enzymes.
MICROBIOLOGICAL RESEARCH
(2023)
Article
Engineering, Environmental
Sara Tufi, Pim N. H. Wassenaar, Victoria Osorio, Jacob de Boer, Pim E. G. Leonards, Marja H. Lamoree
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2016)
Review
Environmental Sciences
Pim Nicolaas Hubertus Wassenaar, Leonardo Trasande, Juliette Legler
ENVIRONMENTAL HEALTH PERSPECTIVES
(2017)
Article
Environmental Sciences
Charles Bodar, Job Spijker, Johannes Lijzen, Susanne Waaijers-van der Loop, Richard Luit, Evelyn Heugens, Martien Janssen, Pim Wassenaar, Theo Traas
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2018)
Article
Green & Sustainable Science & Technology
Cora Fernandez-Dacosta, Pim N. H. Wassenaar, Ivana Dencic, Michiel C. Zijp, Ana Morao, Evelyn H. W. Heugens, Li Shen
JOURNAL OF CLEANER PRODUCTION
(2019)
Article
Environmental Sciences
Pim N. H. Wassenaar, Eric M. J. Verbruggen, Ellen Cieraad, Willie J. G. M. Peijnenburg, Martina G. Vijver
Article
Medicine, Legal
Pim N. H. Wassenaar, Emiel Rorije, Martina G. Vijver, Willie J. G. M. Peijnenburg
Summary: This study developed structural similarity models to identify potential substances of very high concern, showing high predictive performance on an internal dataset. The models were evaluated on an external dataset using expert opinions, providing detailed analysis of the model's strengths and limitations.
REGULATORY TOXICOLOGY AND PHARMACOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Pim N. H. Wassenaar, Emiel Rorije, Martina G. Vijver, Willie J. G. M. Peijnenburg
Summary: In this study, improvements were made to structural similarity models by grouping known SVHCs into more specific subgroups, re-optimizing similarity models, and providing confidence scores for predicted outcomes. These improvements are directly incorporated into a freely accessible web-based tool, which can assist risk assessors, academia, and industrial partners in screening and prioritizing chemicals for further action and evaluation.
JOURNAL OF COMPUTATIONAL CHEMISTRY
(2022)
Article
Environmental Sciences
Emiel Rorije, Pim N. H. Wassenaar, Jaap Slootweg, Lonneke van Leeuwen, Fleur A. van Broekhuizen, Leo Posthuma
Summary: Current regulatory chemical safety assessments do not account for the simultaneous exposure to multiple chemicals in the environment. This study uses data from European fresh water ecosystems to assess cumulative environmental risks caused by chemical mixtures. The findings highlight the need for adapting policies to achieve a toxic-free environment and the potential usefulness of a Mixture Allocation Factor (MAF) for managing chemical risks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Environmental Sciences
Pim Nicolaas Hubertus Wassenaar, Juliette Legler