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Filename: controllers/Detail.php
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File: /var/www/html/application/controllers/Detail.php
Line: 249
Function: _error_handler
File: /var/www/html/index.php
Line: 316
Function: require_once
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Message: Trying to access array offset on value of type null
Filename: controllers/Detail.php
Line Number: 249
Backtrace:
File: /var/www/html/application/controllers/Detail.php
Line: 249
Function: _error_handler
File: /var/www/html/index.php
Line: 316
Function: require_once
Severity: Warning
Message: Trying to access array offset on value of type null
Filename: controllers/Detail.php
Line Number: 249
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File: /var/www/html/application/controllers/Detail.php
Line: 249
Function: _error_handler
File: /var/www/html/index.php
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Function: require_once
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Message: Trying to access array offset on value of type null
Filename: controllers/Detail.php
Line Number: 249
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File: /var/www/html/application/controllers/Detail.php
Line: 249
Function: _error_handler
File: /var/www/html/index.php
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Filename: models/Detail_model.php
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Line: 71
Function: strpos
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Function: insertAPISummary
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Filename: helpers/my_audit_helper.php
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File: /var/www/html/application/helpers/my_audit_helper.php
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Function: str_replace
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Function: formatAIDetailSummary
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Filename: controllers/Detail.php
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File: /var/www/html/index.php
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Filename: controllers/Detail.php
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Filename: controllers/Detail.php
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Filename: controllers/Detail.php
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Filename: controllers/Detail.php
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File: /var/www/html/index.php
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Filename: controllers/Detail.php
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Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment; they are of concern due to their toxic properties. Anthropogenic activities could contribute in a significant way to the total burden of PAHs in remote mountain areas. In this work, we document the analysis of PAHs deposition through sedimentary records obtained in three remote Andean lakes located in south central Chile. Sediment cores were taken in one of the deepest sections of each lake, ranging from 45 to 135 m depth. Sediments were carefully extruded in 1-cm layers for PAHs and dating analysis (210Pb and 137Cs). Sixteen Environmental Protection Agency prioritary PAHs were analyzed using high-performance liquid chromatography with fluorescence detection. Dating of sediments was possible for only two lakes (Laja and Galletue). The superficial composition of PAHs in each lake is rather similar with a characteristic dominance of perylene; levels ranged 355 to 3050 ng g(-1) d.w. Depositional fluxes averaged 118 microg m2 year(-1) in Laja Lake in contrast to that in Galletue Lake, where average fluxes reach 434 microg m2 year(-1). Dating back to 50 years, PAH profiles did not experience drastic changes despite the rapid development of industrialization over the past 30 years in the surrounding region, indicating that levels and composition remains fairly similar to those of the present. Finally, determined fluxes were in the lower range of depositional fluxes calculated for lakes located in the industrialized northern hemisphere.
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http://dx.doi.org/10.1016/j.ecoenv.2005.07.025 | DOI Listing |
Arh Hig Rada Toksikol
December 2024
1University of Zagreb Faculty of Pharmacy and Biochemistry, Department of Medical Biochemistry and Haematology, Zagreb, Croatia.
Tattooing has become a popular global trend in industrialised countries, with the highest prevalence rates of up to 30-40 % in the adult population younger than 40 years. Common tattoo inks may contain heavy metals, polycyclic aromatic hydrocarbons, and primary aromatic amines, toxic if exceeding permissible limits. It is estimated that about 14.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China. Electronic address:
Polycyclic aromatic hydrocarbons (PAHs) are persistent pollutants in aquatic environments that can accumulate in marine organisms and pose potential health risks to humans through trophic transfer in the food webs. However, the accumulation and health risks of PAHs in organisms at different trophic levels remain unclear. This study investigated the accumulation and trophic transfer of PAHs in 40 marine organisms from Beibu Gulf (China), and assessed their health risks.
View Article and Find Full Text PDFWater Res X
January 2025
MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, PR China.
Hydrophobic organic pollutants in aqueous environments are challenging to biodegrade due to limited contact between microorganisms, the pollutants and the electron acceptor, particularly under anaerobic or anoxic conditions. Here, we propose a novel strategy that uses inexpensive, dual-function elemental sulfur (S) to enhance biodegradation. Using petroleum hydrocarbons as the target pollutants, we demonstrated that hydrophobic and nonpolar S° can concentrate hydrocarbons while simultaneously serving as an electron acceptor to enrich hydrocarbon-degrading bacteria.
View Article and Find Full Text PDFEnviron Pollut
December 2024
School of Fisheries, Ludong University, Yantai 264025, China; Research and Development Center of Science, Technology and Industrialization of Seahorses, Ludong University, Yantai 264025, China. Electronic address:
As a flagship taxa for marine ecosystems, seahorses possess a unique reproductive strategy of "male pregnancy". They are severely threatened by marine petroleum-based pollution but the molecular mechanism involved remains unclear. We evaluated the toxic effects and mechanisms of sub-acute exposure to benzo[a]pyrene (BaP), a representative polycyclic aromatic hydrocarbon (PAH), at three environmental related dosages (0.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
University of Copenhagen, Department of Chemistry, Universitetsparken 5, DK-2100, Copenhagen, DENMARK.
The introduction of 4,5-dihydroazuleno[2,1,8-ija]azulene as a central core between two 1,4-dithiafulvene (DTF) units provides a novel class of extended tetrathiafulvalene (TTF) electron donors. Herein we present the synthesis of such compounds with the azulenoazulene further expanded by annulation to benzene, naphthalene, or thiophene rings. Moreover, unsymmetrical donor-acceptor chromophores with one DTF and one carbonyl at the central core are presented.
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