3,637 results match your criteria heavy pahs

Anaerobic degradation of high-concentration polycyclic aromatic hydrocarbons (PAHs) in seawater sediments.

Mar Pollut Bull 2021 Mar 31;167:112294. Epub 2021 Mar 31.

School of Marine Science & Technology, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.

Recurring oil spill accidents have been a global challenge and contribute to PAHs' heavy accumulation in marine sediments. The rapid bioremediation of PAHs with high concentrations in marine sediments has rarely been studied. In this study, four representative PAHs in crude oil were tested for fast anaerobic biodegradation. Read More

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Intermediate Volatile Organic Compound Emissions from Residential Solid Fuel Combustion Based on Field Measurements in Rural China.

Environ Sci Technol 2021 Apr 2. Epub 2021 Apr 2.

Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.

Residential solid fuel combustion (RSFC) is a key cause of air pollution in China. In these serial studies, field measurements of RSFC from 166 rural households in eastern China were conducted to update the database of emission factors (EFs) and chemical profiles of gaseous and particulate organic pollutants, and the present study focuses on the intermediate volatile organic compounds (IVOCs), which are precursors of secondary organic aerosol (SOA). The results show that the averaged EFs of IVOCs (EF) for crop straw, fuelwood, and coal are 550. Read More

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Red Blood Cell Cytotoxicity Associated to Heavy Metals and Hydrocarbons Exposure in Flounder Fish from Two Regions of the Gulf of Mexico.

Bull Environ Contam Toxicol 2021 Mar 23. Epub 2021 Mar 23.

Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional - Unidad Mérida, Km. 6 Antigua Carretera a Progreso, CORDEMEX, CP 97310, Mérida, Yucatán, Mexico.

In this study, the genotoxic effect of contaminants was assessed through detection of DNA damage using the micronucleus (MNs) test in erythrocytes from 149 flounder fish collected in two regions of the Gulf of Mexico (GoM). The frequency of microcytes (MCs) was also evaluated in the same group of fish collected from the Perdido Foldbelt (PF) and the Yucatan Platform (YP). The MCs frequency was different among locations of the YP (p = 0. Read More

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Extracts from Dated Lake Sediment Cores in the Athabasca Oil Sands Region Alter EROD Activity and Gene Expression in Avian Hepatocytes.

Environ Toxicol Chem 2021 Mar 10. Epub 2021 Mar 10.

Ecotoxicology and Wildlife Health Division, Environment and Climate Change Canada, National Wildlife Research Centre, Carleton University, Ottawa, ON, Canada, K1A 0H3.

Increases in oil sands mining operations in the Athabasca oil sands region have resulted in increased concentrations of polycyclic aromatic compounds (PAC) and heavy metals in aquatic systems located near surface mining operations. In this present study, sediment cores were collected from three lakes with varying proximity to surface mining operations to determine the differences in PAC concentrations. Sediment cores were separated into two sections - current mining (top [T]; 2000-2017) and pre-mining (bottom [B]; pre-1945) - and extracts were prepared for in vitro screening using a well-established chicken embryonic hepatocyte (CEH) assay. Read More

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[Characteristics of Sludge and Associated Risk Assessment of Urban Sewage Treatment Plants].

Huan Jing Ke Xue 2021 Apr;42(4):1956-1966

Beijing Municipal Ecological and Environmental Monitoring Center, Beijing 100048, China.

In urban solid waste management, the scientific and reasonable disposal and utilization of sewage sludge is becoming more and more important. It can be said that the pollution status and chemical properties of sewage sludge in urban sewage treatment plants can provide a basis for the scientific disposal and utilization of sludge. In this study, the characteristics of pH, moisture content, Cd, Cr, Cu, Zn, Pb, As, Hg, Ni, mineral oil, volatile phenol, PAHs, organic matter, nitrogen, phosphorus, and potassium were evaluated in sewage sludge collected from 49 sewage treatment plants in a certain city. Read More

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Seasonal variations of polycyclic aromatic hydrocarbons in coastal sediments of a marine resource hot spot: the case of pars special economic energy zone, Iran.

Environ Geochem Health 2021 Mar 19. Epub 2021 Mar 19.

Water Engineering Department, Bu-Ali Sina University, Hamedan, Iran.

Polycyclic aromatic hydrocarbons (PAHs) are an important group of compounds of major environmental concern, which are in the class of persistent organic pollutants. Therefore, the key purpose of this research was to analyze seasonal fluctuations and to determine the probability of polycyclic aromatic hydrocarbons in coastal sediments of the Iranian Marine Resource Center based on the evaluation of 16 US-EPA important PAH compounds. These compounds have been collected from intertidal sediments located in the marine resources of southern Iran in different seasons. Read More

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Highly Contaminated Marine Sediments Can Host Rare Bacterial Taxa Potentially Useful for Bioremediation.

Front Microbiol 2021 1;12:584850. Epub 2021 Mar 1.

Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy.

Coastal areas impacted by high anthropogenic pressures typically display sediment contamination by polycyclic aromatic hydrocarbons (PAHs) and heavy metals (HMs). Microbial-based bioremediation represents a promising strategy for sediment reclamation, yet it frequently fails due to poor knowledge of the diversity and dynamics of the autochthonous microbial assemblages and to the inhibition of the target microbes in the contaminated matrix. In the present study, we used an integrated approach including a detailed environmental characterization, high-throughput sequencing and culturing to identify autochthonous bacteria with bioremediation potential in the sediments of Bagnoli-Coroglio (Gulf of Naples, Mediterranean Sea), a coastal area highly contaminated by PAHs, aliphatic hydrocarbons and HMs. Read More

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Giant Toads (Rhinella marina) From the Industrial Zones of Low Basin of the Coatzacoalcos River (Veracruz, MX) Presents Genotoxicity in Erythrocytes.

Bull Environ Contam Toxicol 2021 Mar 15. Epub 2021 Mar 15.

Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), CIACyT - Facultad de Medicina, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550, Lomas 2a. Sección, 78210, San Luis Potosí, México.

The lower basin of Coatzacoalcos River is one of the most polluted regions of the southern Gulf of Mexico. Organochlorine compounds, polybrominated diphenyl ethers, polycyclic aromatic hydrocarbons, and heavy metals have been registered in this region. In the present study, genotoxicity was evaluated in the blood of giant toads (Rhinella marina) from Coatzacoalcos' rural and industrial zones, and compared with laboratory toads. Read More

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Field study on the soil bacterial associations to combined contamination with heavy metals and organic contaminants.

Sci Total Environ 2021 Mar 8;778:146282. Epub 2021 Mar 8.

South China Institute of Environmental Sciences, Ministry of Ecology and Environment, 7 West Street, Yuancun, Guangzhou 510655, PR China. Electronic address:

The understanding of soil microbial associations to combined contamination would substantially benefit the restoration of damaged ecosystems, which is currently limited at the field scale. In this study, we investigated the soil bacterial associations to combined contamination with metals (Cd, Cu, Hg, Pb, and Zn), polyaromatic hydrocarbons (PAHs), and polybrominated diphenyl ethers (PBDEs). Samples were collected from field sites under five land-use patterns with electronic waste recycling. Read More

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Synergistic, antagonistic, and additive effects of heavy metals (copper and cadmium) and polycyclic aromatic hydrocarbons (PAHs) under binary and tertiary combinations in key habitat-forming kelp species of Chile.

Environ Sci Pollut Res Int 2021 Apr 11;28(14):18300-18307. Epub 2021 Mar 11.

Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile.

Heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) are persistent toxicants in coastal environments. Notably, in comparison to individual metal toxicity, knowledge about the effects of HMs and PAHs mixtures on kelps remains scarce. Accordingly, we performed in vitro experiments to determine the individual and combined effects of Cu, Cd, and PAHs on spore release, settlement, and germination on Macrocystis pyrifera and Lessonia spicata, two key-habitat forming kelp species of the coast of the Valparaíso Region in Chile. Read More

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Five-Year Enhanced Natural Attenuation of Historically Coal-Tar-Contaminated Soil: Analysis of Polycyclic Aromatic Hydrocarbon and Phenol Contents.

Int J Environ Res Public Health 2021 Feb 25;18(5). Epub 2021 Feb 25.

Department of Environmental Management, Faculty of Environmental Management and Agriculture, West Pomeranian University of Technology in Szczecin, Słowackiego Str. 17, 71-434 Szczecin, Poland.

The objective of this study was to assess the soil pollution on an industrial wasteland, where coal-tar was processed in the period between 1880 and 1997, and subsequent to assess the decline in the content of phenols and polycyclic aromatic hydrocarbons (PAHs) during enhanced natural attenuation. The soil of the investigated area was formed from a layer of uncompacted fill. Twelve sampling points were established in the investigated area for collecting soil samples. Read More

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February 2021

Persistent contamination of polycyclic aromatic hydrocarbons (PAHs) and phthalates linked to the shift of microbial function in urban river sediments.

J Hazard Mater 2021 Feb 17;414:125416. Epub 2021 Feb 17.

Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, College of Life Science and Technology, Jinan University, Guangzhou 510632, China. Electronic address:

Urban rivers were heavily polluted, which resulted in blackening and odorization (i.e., black-odor rivers). Read More

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February 2021

Size-distribution-based assessment of human inhalation and dermal exposure to airborne parent, oxygenated and chlorinated PAHs during a regional heavy haze episode.

Environ Pollut 2020 Aug 24;263(Pt A):114661. Epub 2020 Apr 24.

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China. Electronic address:

The adverse health effects of haze and particle-bound contaminants in China have recently caused increasing concern, and particle size plays a significant role in affecting human exposure to haze-correlated pollutants. To this background, size-segregated particulate samples (nine size fractions (<0.4, 0. Read More

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Traffic-related microplastic particles, metals, and organic pollutants in an urban area under reconstruction.

Sci Total Environ 2021 Feb 7;774:145503. Epub 2021 Feb 7.

VTI, Swedish National Road and Transport Research Institute, SE-581 95 Linköping, Sweden; Geology and Geotechnics, Department of Architecture and Civil Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.

In urban environments, particularly areas under reconstruction, metals, organic pollutants (OP), and microplastics (MP), are released in large amounts due to heavy traffic. Road runoff, a major transport route for urban pollutants, contributes significantly to a deteriorated water quality in receiving waters. This study was conducted in Gothenburg, Sweden, and is unique because it simultaneously investigates the occurrence of OP, metals, and MP on roads and in stormwater from an urban area under reconstruction. Read More

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February 2021

Polycyclic aromatic hydrocarbons in yerba mate () infusions and probabilistic risk assessment of exposure.

Toxicol Rep 2021 3;8:324-330. Epub 2021 Feb 3.

Instituto Polo Tecnológico de Pando, Facultad de Química, Universidad de la República, Camino Aparicio Saravia s/n, 91000 Pando, Canelones, Uruguay.

The aim of this study was to assess the risk of exposure to polycyclic aromatic hydrocarbons (PAH) from yerba mate infusions in Uruguay using the margin of exposure approach (MOE) and a probabilistic method (Monte Carlo simulation). Servings/day, portion size, weekly frequency of mate consumption and body weight were the factors considered. The amount in infusions of benz[a]pyrene (B[a]P), PAH2 (sum of chrysene and B[a]P), and PAH4 (sum of benz[a]anthracene, chrysene, benz[b]fluoranthene and B[a]P) were used as markers of PAH exposure. Read More

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February 2021

Fate of antibiotic resistance genes and metal resistance genes during the thermophilic fermentation of solid and liquid swine manures in an ectopic fermentation system.

Ecotoxicol Environ Saf 2021 Apr 13;213:111981. Epub 2021 Feb 13.

Institute of Plant Protection and Microbiology, Zhejiang Academy of Agriculture Science, Hangzhou, Zhejiang, PR China.

Environmental pollution due to resistance genes from livestock manure has become a serious issue that needs to be resolved. However, little studies focused on the removal of resistance genes in simultaneous processing of livestock feces and urine. This study investigated the fate of antibiotic resistance genes (ARGs), metal resistance genes (MRGs), and class 1 integron-integrase gene (intI1) during thermophilic fermentation of swine manure in an ectopic fermentation system (EFS), which has been regarded as a novel system for efficiently treating both feces and urine. Read More

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The Role of Methyl Groups in the Early Stage of Thermal Polymerization of Polycyclic Aromatic Hydrocarbons Revealed by Molecular Imaging.

Energy Fuels 2021 Feb 12;35(3):2224-2233. Epub 2021 Jan 12.

Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 E., Annandale, New Jersey 08801, United States.

The initial thermal reactions of aromatic hydrocarbons are relevant to many industrial applications. However, tracking the growing number of heavy polycyclic aromatic hydrocarbon (PAH) products is extremely challenging because many reactions are unfolding in parallel from a mixture of molecules. Herein, we studied the reactions of 2,7-dimethylpyrene (DMPY) to decipher the roles of methyl substituents during mild thermal treatment. Read More

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February 2021

The impact of air pollution on skin and related disorders: A comprehensive review.

Dermatol Ther 2021 Mar 12;34(2):e14840. Epub 2021 Feb 12.

Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

As the largest organ in the body, human skin is constantly exposed to harmful compounds existing in the surrounding environment as the first-line barrier. Studies have indicated that exposure to high concentrations of many environmental factors, such as ultraviolet (UV) radiation, outdoor air pollutants, including polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), particulate matter (PM), heavy metals, gaseous pollutants, such as carbon monoxide (CO), nitric oxides (NO ), sulfur oxide (SO ), ozone (O ), and indoor air pollutants (solid fuels consumption), might interrupt the skin's normal barrier function. Besides, the intensity of the pollutants and the length of exposure might be a contributing factor. Read More

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Magnetic solid phase extraction of heterocyclic aromatic hydrocarbons from environmental water samples with multiwalled carbon nanotube modified magnetic polyamido-amine dendrimers prior to gas chromatography-triple quadrupole mass spectrometer.

J Chromatogr A 2021 Feb 21;1639:461921. Epub 2021 Jan 21.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China.

Present study described a sensitive and efficient method for determination of heterocyclic aromatic hydrocarbons using multiwalled carbon nanotubes modified magnetic polyamido-amine dendrimers (MNPs@PAMAM-Gn@MWCNTs) as adsorbent for magnetic solid-phase extraction (MSPE) coupled with gas chromatography-triple quadrupole mass spectrometer (GC-MS/MS). Some pivotal parameters including PAMAM generation, adsorbent dosage, adsorption time, elution time and volume, pH and humic acid concentration were investigated to achieve the best adsorption efficiencies. Under the optimal conditions, 7-methylquinoline, dibenzothiophene and carbazole had good linearity in the concentration range of 0. Read More

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February 2021

Quantitative analysis of the main sources of pollutants in the soils around key areas based on the positive matrix factorization method.

Environ Pollut 2021 Jan 18;273:116518. Epub 2021 Jan 18.

Beijing Key Laboratory of Remediation of Industrial Pollution Sites, Environmental Protection Research Institute of Light Industry, Beijing Academy of Science and Technology, Beijing, 100089, China.

Quantitative identification of the main sources of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in soils around multiple types of key areas is of great significance for blocking pollution sources. However, there is a lack of more comprehensive relevant research. In this study, Beijing was taken as the research area and four main sources were identified using the positive matrix factorization (PMF) method. Read More

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January 2021

Micropollutants impair the survival of Oreochromis niloticus and threat local species from Iguaçu River, Southern of Brazil.

Environ Toxicol Pharmacol 2021 Apr 19;83:103596. Epub 2021 Jan 19.

Laboratório de Toxicologia Celular, Departamento de Biologia Celular, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531-970, Curitiba, PR, Brazil. Electronic address:

The wastewater contamination of urban rivers is a concern for biodiversity and a consequence from poor urban conservation policies. In the current study, the impact of urban and industrial activities was investigated in Iguaçu river (Southern Brazil) using juvenile Oreochromis niloticus, after trophic and chronic exposure (25, 50 and 100 %), over 81 days. After exposure liver, gills, gonads, brain, muscle, and blood were sampled for chemical, biochemical, histopathological, genotoxic and molecular analyses. Read More

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Distribution and possible sources of polycyclic aromatic hydrocarbons (PAHs) and metals in marine surface sediments off northern Mozambique.

Mar Pollut Bull 2021 Feb 16;163:111952. Epub 2021 Jan 16.

Instituto Nacional de Investigacão Pesqueira, Av. Mao Tsé Tung 309, Maputo, Mozambique; Ocean Science and Marine Food Security, Nelson Mandela University, Port Elizabeth 6001, South Africa.

Liquid natural gas (LNG) exploration has started off the coast of northern Mozambique, in the Rovuma Basin, East Africa. In advance of gas production, we collected in 2018 over 100 samples of surface sediments from 40 locations in the pristine and exploration areas at water depths of 5-2000 m. We have determined the levels of hydrocarbons (total hydrocarbon contents (THC) and 49 individual PAHs), heavy metals, arsenic, grain size and total organic carbon. Read More

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February 2021

Impact of environmental toxin exposure on male fertility potential.

Transl Androl Urol 2020 Dec;9(6):2797-2813

Department of Urology, University of Virginia, Charlottesville, VA, USA.

Idiopathic infertility is the most common individual diagnosis in male infertility, representing nearly 44% of cases. Research studies dating over the last half-century consistently demonstrate a decline in male fertility that is incompletely explained by obesity, known genetic causes, or diet and lifestyle changes alone. Human exposures have changed dramatically over the same time course as this fertility decline. Read More

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December 2020

Determination of polycyclic aromatic hydrocarbons in olives exposed to three different industrial sources and in their respective oils.

Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021 Mar 16;38(3):439-451. Epub 2021 Jan 16.

Department of Food Engineering, Ege University, Izmir, Turkey.

Atmospheric contamination of plant raw material with Polycyclic Aromatic Hydrocarbons (PAHs) helps explain their presence in edible vegetable oils. This study compared PAH contamination of Turkish olive fruits during their growing period on the tree and their respective oils from three different industrial sources (petroleum refinery, thermal power plant and heavy industry site). The method included liquid-liquid extraction solid-phase extraction for cleanup followed by HPLC with fluorescence detector. Read More

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Recent advances in biochar engineering for soil contaminated with complex chemical mixtures: Remediation strategies and future perspectives.

Sci Total Environ 2021 May 29;767:144351. Epub 2020 Dec 29.

School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK. Electronic address:

Heavy metal/metalloids (HMs) and polycyclic aromatic hydrocarbons (PAHs) in soil have caused serious environmental problems, compromised agriculture quality, and have detrimental effects on all forms of life including humans. There is a need to develop appropriate and effective remediation methods to resolve combined contaminated problems. Although conventional technologies exist to tackle contaminated soils, application of biochar as an effective renewable adsorbent for enhanced bioremediation is considered by many scientific researchers as a promising strategy to mitigate HM/PAH co-contaminated soils. Read More

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Sex-Specific Differences in the Toxic Effects of Heavy Fuel Oil on Sea Urchin ().

Int J Environ Res Public Health 2021 01 9;18(2). Epub 2021 Jan 9.

College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China.

The purpose of this study was to explore and compare the sex-specific differences in the toxic effects of water-accommodated fractions of 380# heavy fuel oil (HFO WAF) on the sea urchin . Sea urchins were acutely exposed to HFO WAF at different nominal concentrations (0%, 10% and 20%) for seven days. The results showed that females had a higher polycyclic aromatic hydrocarbons (PAHs) bioaccumulation in gonad tissues and that both the total antioxidant capacity (TAC) and lipid peroxidation (LPO) levels in the gonad tissues of females were much higher than those of males. Read More

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January 2021

Vaping and lung cancer - A review of current data and recommendations.

Lung Cancer 2021 03 2;153:11-20. Epub 2021 Jan 2.

Department of Pathology, St James' Hospital and Trinity College School of Medicine, Dublin, Ireland.

Objectives: Lung cancer is the most common cause of cancer mortality worldwide and, while tobacco smoke remains the primary cause, there is increasing concern that vaping and E-cigarette use may also increase lung cancer risk. This review concentrates on the current data, scholarship and active foci of research regarding potential cancer risk and oncogenic mechanisms of vaping and lung cancer.

Materials And Methods: We performed a literature review of current and historical publications on lung cancer oncogenesis, vaping device/e-liquid contents and daughter products, molecular oncogenic mechanisms and the fundamental, potentially oncogenic, effects of electronic cigarette smoke/e-liquid products. Read More

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The impact of the marine sewage outfalls on the sediment quality: The Black Sea and the Marmara case.

Saudi J Biol Sci 2021 Jan 8;28(1):238-246. Epub 2020 Oct 8.

Faculty of Fisheries, Recep Tayyip Erdogan University, 53100 Rize, Turkey.

Marine sewage outfalls are the cheapest method of disposal for municipalities with restricted funds, despite their negative effects on marine ecosystems. This study was conducted on the marine sewage outfalls of the Turkish cities Rize (Black Sea) and Yalova (Sea of Marmara). Heavy metals, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and organochlorine pesticides (OCPs) were investigated in the sediments for determine pollution degree. Read More

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January 2021

Application of in situ bioremediation strategies in soils amended with sewage sludges.

Sci Total Environ 2021 Apr 26;766:144099. Epub 2020 Dec 26.

Cell Biology in Environmental Toxicology (CBET) Research Group, Dept. Zoology and Animal Cell Biology, Faculty of Science and Technology & Research Centre for Experimental Marine Biology and Biotechnology PIE-UPV/EHU, University of the Basque Country UPV/EHU, E-48080 Bilbao, Basque Country, Spain. Electronic address:

Increasing soil loss and the scarcity of useful land requires new reusing strategies. Thus, recovery of polluted soils recovery offers a chance for economic and social regeneration. With this objective, different soil cleaning technologies have been developed during the last few decades. Read More

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Risk assessment and ecotoxicological diagnosis of soil from a chemical industry park in Nanjing, China.

Ecotoxicology 2021 Jan 6. Epub 2021 Jan 6.

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China.

Soil pollution due to the activities of industrial parks, is becoming an increasingly serious issue, particularly throughout China. Therefore, it is essential to explore the soil pollution characteristics and its ecotoxicological effects on model species, such as higher plant species, in typical industrial areas. In this study, concentrations of heavy metals and polycyclic aromatic hydrocarbons (PAHs) were examined in the soil collected from 10 sampling sites at a chemical industry park in Nanjing, China. Read More

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January 2021