In the present research, an ultrasound-assisted magnetic solid-phase extraction coupled with a gas chromatography-mass spectrometry hybrid system was developed for the extraction/determination of trace amounts of polycyclic aromatic hydrocarbons in high-consumption soft drinks and non-alcoholic beers in Iran using magnetite graphene oxide adsorbent. The magnetite graphene oxide was characterized by scanning electron microscope, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, and vibrating-sample magnetometer techniques. The highest extraction recovery (73.05%-95.56%) and enrichment factor (90.65-106.38) were obtained at adsorbent mass: 10 mg, adsorption time: 30 min, salt addition: sodium chloride 10% w/v, desorption time: 20 min, eluent type: hexane: acetone (1:1, v/v), and desorption solvent volumes: 200 μl. Under optimum conditions, the linearity range for polycyclic aromatic hydrocarbons determination was 0.2-200 ng/ml with a coefficient of determination > 0.993, the limit of detection = 0.09-0.21 ng/ml, the limit of quantitation = 0.3-0.7 ng/ml, and relative standard deviation < 8.1%, respectively. Relative recoveries in spiked real samples ranged from 94.67 to 109.45% with a standard deviation < 6.05%. The proposed method is effective, sensitive, and reusable and it is promising for the analysis of polycyclic aromatic hydrocarbons residues in environmental samples.
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http://dx.doi.org/10.1002/jssc.202200365 | DOI Listing |
J Allergy Clin Immunol Pract
December 2024
Department of Medicine, Division of Allergy and Immunology, University of Nebraska Medical Center, Omaha, NE. Electronic address:
As the effects of anthropogenic climate change have become more apparent, the influences of climate and extreme weather events on health have continued to gain attention. The fact Earth has warmed over the past century is indisputable and the rate of warming is more alarming. As a result of anthropogenic climate change an alteration in the air mixture has occurred over time.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
Post-graduation program in Ecology and Biodiversity Conservation, Federal University of Mato Grosso (UFMT), Mato Grosso, MT 78060-900, Brazil; Post-graduation program in Ecology. Department of Ecology and Zoology, Laboratory of Freshwater Biodiversity, Federal University of Santa Catarina (UFSC), Florianópolis, SC 88040-900, Brazil.
The frequency and intensity of wildfires have been increasing in many parts of the world, which may result in biodiversity loss. Wildfires can devastate plant communities, generating toxic ash that pollutes watercourses through runoff. However, our understanding of the effects of ash exposure on aquatic biodiversity is still limited.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China.
Immobilized microorganism technology is expected to enhance microbial activity and stability and is considered an effective technique for removing soil polycyclic aromatic hydrocarbons (PAHs). However, there are limited high-efficiency and stable bacterial preparations available. In this study, alkali-modified biochar (Na@CBC700) was used as the adsorption carrier, sodium alginate (SA) and polyvinyl alcohol (PVA) as embedding agents, and CaCl as the cross-linking agent to prepare immobilized Acinetobacter (CoIMB) through a composite immobilization method.
View Article and Find Full Text PDFJ Appl Microbiol
December 2024
Environmental Biotechnology Laboratory, Environmental Toxicology Group, FEST Division, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow-226001, Uttar Pradesh, India.
Aims: To isolate polyethylene terephthalate (PET) degrading bacteria and elucidate the underlying mechanisms of PET biodegradation through biochemical and genome analysis.
Methods And Results: A Rhodococcus rhodochrous IITR131 was found to degrade PET. Strain IITR131 genome revealed metabolic versatility of the bacterium and had the ability to form biofilm on PET sheet resulting in the cracks, abrasions, and degradation.
Environ Pollut
December 2024
Chalmers University of Technology, Gothenburg, 41296, Sweden.
Marine organisms are constantly exposed to complex chemical mixtures from natural and anthropogenic sources. One source that has raised concerns is the discharge water from ships equipped with exhaust gas cleaning systems, commonly known as scrubbers. During operation, ships with scrubbers discharge large volumes of scrubber water, known to adversely affect marine organisms, into the environment.
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