scholarly journals Polycyclic aromatic hydrocarbons as markers of environmental and hydrological processes (identification problems and research experience)

2020 ◽  
Vol 163 ◽  
pp. 03005
Author(s):  
Aleksandr Khaustov ◽  
Margarita Redina ◽  
Inna Nemirovskaya
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
River Water ◽  
Aromatic Hydrocarbons ◽  
Hydrological Processes ◽  
Natural Environments ◽  
Research Experience ◽  
Black And White ◽  
Water Testing ◽  
Polycyclic Aromatic ◽  
Almost All

The efficiency of the study of polycyclic aromatic hydrocarbons (PAHs) as markers of many environmental and hydrological processes is disclosed. On the example of the interaction between sea and river water the flows of substances and problems of their detection in media, as well as the laws of fractionation during phase transitions at geochemical barriers (GCB) are presented. The authors have collected an extensive database for almost all types of natural environments. Own research was conducted at specialized water testing sites (springs, a mud volcano, brine of a lake, the Northern Dvina River, water of Black and White Seas, water bodies of the Moscow Region and Albena region (Bulgaria), etc. This allowed substantiating the optimal markers and creating effective methods for identifying a complex of hydrological processes.

Trace level determination of polycyclic aromatic hydrocarbons in river water with automated pretreatment HPLC

2013 ◽  
Vol 36 (6) ◽  
pp. 1128-1134 ◽  
Author(s):  
Yoshiyuki Watabe ◽  
Takuya Kubo ◽  
Tetsuya Tanigawa ◽  
Yoshihiro Hayakawa ◽  
Koji Otsuka ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
River Water ◽  
Aromatic Hydrocarbons ◽  
Trace Level ◽  
Polycyclic Aromatic ◽  
Trace Level Determination

scholarly journals Reversed Phase SPE and GC-MS Study of Polycyclic Aromatic Hydrocarbons in Water Samples from the River Buriganga, Bangladesh

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Md. Saddam Nawaz ◽  
Farhana Khanam Ferdousi ◽  
Mohammad Arifur Rahman ◽  
A. M. Shafiqul Alam
Keyword(s):  
Gas Chromatography ◽  
Polycyclic Aromatic Hydrocarbons ◽  
River Water ◽  
Flow Rate ◽  
Aromatic Hydrocarbons ◽  
Water Samples ◽  
Research Work ◽  
Reversed Phase ◽  
Fused Silica ◽  
Polycyclic Aromatic

Polycyclic aromatic hydrocarbons (PAHs) are semivolatile organic compounds (SVOCs) categorized as persistent organic pollutants (POPs). PAHs are ubiquitous in terrestrial, atmospheric, and particularly aquatic environments throughout the world and have been detected in lakes, ground waters, and rivers. This research work involved the analysis of five PAHs, anthracene, fluorene, naphthalene, phenanthrene, and pyrene, in water sample collected from the river Buriganga, Bangladesh. The extraction of water samples was carried out by reversed phase solid-phase extraction (RP-SPE) technique with C-18 SPE cartridges. A solvent mixture of dichloromethane and hexane (1 : 2) with a flow rate of 0.5 mL/min was used as eluent. Percentage recoveries of five PAHs for this technique were in the range of 81.47 ± 1.16 to 98.60 ± 0.61%. PAHs quantification was achieved by using an ion trap gas chromatography mass spectrometer (GC-MS) interfaced to gas chromatography (GC) equipped with a fused silica capillary column. Helium was used as carrier gas with a flow rate of 1.0 mL/min. The commonly detected PAH compounds in the river water were anthracene, naphthalene, and phenanthrene at the concentration ranges of 0.451 to 3.201, 0.033 to 3.1131, and 0.320 to 2.546 μg/mL, respectively. The results reflect that PAHs presented in this river water were mostly from petrogenic and pyrogenic sources.

scholarly journals Initial microbial degradation of polycyclic aromatic hydrocarbons

2016 ◽  
Vol 22 (3) ◽  
pp. 293-299 ◽  
Author(s):  
Jelena Milic ◽  
Jelena Avdalovic ◽  
Tatjana Solevic-Knudsen ◽  
Gordana Gojgic-Cvijovic ◽  
Tanja Jednak ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Environmental Pollutants ◽  
Bacterial Isolates ◽  
Rdna Sequences ◽  
16S Rdna Sequences ◽  
Polycyclic Aromatic ◽  
Almost All ◽  
Rhodococcus Sp

The group of polycyclic aromatic hydrocarbons (PAHs) are very hazardous environmental pollutants because of their mutagenic, carcinogenic and toxic effects on living systems. The aim of this study was to examine and compare the ability and efficiency of selected bacterial isolates obtained from oil-contaminated areas to biodegrade PAHs. The potential of the bacteria to biodegrade various aromatic hydrocarbons was assessed using the 2,6-dichlorophenol-indophenol assay. Further biodegradation of PAHs was monitored by gravimetric and gas-chromatographic analysis. Among the eight bacterial isolates, identified on the basis of 16S rDNA sequences, two isolates, Planomicrobium sp. RNP01 and Rhodococcus sp. RNP05, had the ability to grow on and utilize almost all examined hydrocarbons. Those isolates were further examined for biodegradation of phenanthrene and pyrene, as single substrates, and as a mixture, in vitro for ten days. After three days, both isolates degraded a significant amount phenanthrene, which has a simpler chemical structure than pyrene. Planomicrobium sp.RNP01 commenced biodegradation of pyrene in the PAH mixture only after it had almost completly degraded phenanthrene. The isolated and characterized bacteria, Planomicrobium sp. RNP01 and Rhodococcus sp. RNP05, have shown high bioremediation potential and are likely candidates to be used for degradation of highly toxic PAHs in contaminated areas.

Magnetic magnesium oxide composites for rapid removal of polycyclic aromatic hydrocarbons and cadmium ions from water

2020 ◽  
Vol 17 (7) ◽  
pp. 479
Author(s):  
Dongqin Tan ◽  
Jing Jin ◽  
Cuicui Guo ◽  
Dhanjai ◽  
Jiping Chen
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Three Dimensional ◽  
Precipitation Method ◽  
Precipitation Process ◽  
Cadmium Ions ◽  
Potential Applications ◽  
Equilibrium Data ◽  
Polycyclic Aromatic ◽  
Almost All

Environmental contextRemediation of wastewater containing polycyclic aromatic hydrocarbons and metals is essential to limit adverse effects on the environment and human health. Using a simple precipitation method, we prepared porous magnetic MgO hybrids for use as a material for removing pollutants from wastewater. The material showed excellent removal performance for 12 polycyclic aromatic hydrocarbons and cadmium ions, and thus has potential applications in wastewater treatment. AbstractHierarchical porous magnetic MgO hybrids (Fe3O4/MgO) are controllably synthesised based on a facile precipitation process. The resulting material displays a three-dimensional architecture with nest-like morphology, large surface area (135.2m2 g−1) and uniform mesochannels (5–35nm). The adsorption equilibrium data of target polycyclic aromatic hydrocarbons (PAHs) on Fe3O4/MgO sorbents are described by the Langmuir isotherm model. The composites show a strong tendency for the removal of PAHs owing to their porous structure that possesses an excellent affinity for PAHs. Under the optimal conditions, a removal of more than 70% is achieved for 12 PAHs. The materials also exhibit a good removal ability of cadmium (Cd2+) from water with fast adsorption (<5min) and high removal percentage (>80%). Moreover, the composites possess sufficient magnetism for separation. To demonstrate the performance of the sorbents, Fe3O4/MgO is exposed to aqueous samples spiked with low concentrations of PAHs and Cd2+. In almost all cases, the composites are superior to the commercially available sorbents as well as un-functionalised Fe3O4 nanoparticles. Therefore, this work provides a promising approach for the simultaneous removal of PAHs and Cd2+ from water using multifunctional MgO microspheres.

scholarly journals Distribution and sources of polycyclic aromatic hydrocarbons in the aquatic environment: a multivariate analysis

2010 ◽  
Vol 63 (2) ◽  
pp. 211-218 ◽  
Author(s):  
Joil José Celino ◽  
Henry Xavier Corseuil ◽  
Marilda Fernandes ◽  
Karina Santos Garcia
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Surface Water ◽  
Aromatic Hydrocarbons ◽  
Principal Component ◽  
Mean Value ◽  
Gas Chromatography Mass Spectrometry ◽  
The Us ◽  
Polycyclic Aromatic ◽  
Sewage Contamination ◽  
Almost All

Fourteen polycyclic aromatic hydrocarbons (PAHs) included in the US Environmental Protection Agency's (EPA) priority pollutant list were analyzed using gas chromatography-mass spectrometry (GC--MS). Surface water sampling was undertaken in the Paraguaçu Estuary (Bahia), northern Brazil. Total PAH concentrations varied from 0.0029 to 0.1079 ng/L in the surface waters (main rivers, tributaries) with a mean value of 0.0344 ng/L. Such concentrations can be taken as background values for the studied region. The PAH profiles were dominated by low molecular weight PAHs (two- and three-ring components) in surface water samples. It indicated that PAHs in surface water may have its origin from oil or sewage contamination (petrogenic input). The collected data showed that petrogenic input was predominant at almost all the stations investigated. To discriminate pattern differences and similarities among the samples, a principal component analysis (PCA) was performed using a correlation matrix. PCA revealed the latent relationships among all the surface water from the investigated stations.

Polycyclic Aromatic Hydrocarbons in Kajal and Surma Eye Cosmetic Preparations

1988 ◽  
Vol 7 (2) ◽  
pp. 195-197 ◽  
Author(s):  
J.P. Jani ◽  
C.V. Raiyani ◽  
N.M. Desai ◽  
S.K. Kashyap
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Black And White ◽  
Median Level ◽  
Polycyclic Aromatic

Levels of polycyclic aromatic hydrocarbons (PAH) were determined in Kajal and Surma eye cosmetic preparations. All the preparations showed the presence of the majority of priority PAH in varying levels. The median level of a total 18 identified PAH in kajal was 851.3 μg/g. The level of total PAH in black, whitish black and white surma preparations were 243.34, 230.60 and 45.40 μg/g respectively.

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