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Pesquisa : D02.455.426.559.847.799 [Categoria DeCS]
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[PMID]:29478645
[Au] Autor:Rogula-Kozlowska W; Kozielska B; Majewski G; Rogula-Kopiec P; Mucha W; Kociszewska K
[Ad] Endereço:Institute of Environmental Engineering, Polish Academy of Sciences, 34 M. Sklodowska-Curie St., 41-819 Zabrze, Poland; The Main School of Fire Service, Faculty of Fire Safety Engineering, 52/54 Slowackiego St., 01-629 Warsaw, Poland. Electronic address: wioletta.rogula-kozlowska@ipis.zabrze.pl.
[Ti] Título:Submicron particle-bound polycyclic aromatic hydrocarbons in the Polish teaching rooms: Concentrations, origin and health hazard.
[So] Source:J Environ Sci (China);64:235-244, 2018 Feb.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The goal of the work was to investigate the concentrations of the 16 US EPA priority polycyclic aromatic hydrocarbons (PAH) bound to submicrometer particles (particulate matter, PM ) suspended in the air of university teaching rooms and in the atmospheric air outside. Two teaching rooms were selected in two Polish cities, Gliwice, southern Poland, and Warsaw, central Poland, differing with regard to the ambient concentrations and major sources of PM and PAH. The variabilities of indoor and outdoor 24-hr concentrations of PM -bound PAH, the ratio (I/O) of the indoor to outdoor 24-hr concentrations of PM -bound PAH, probable sources of PAH and the level of the hazard from the mixture of the 16 PAH (ΣPAH) to humans at both sites were analyzed. In both Warsaw and Gliwice, the mean concentrations of PM -bound ΣPAH were slightly higher in the atmospheric air than in the rooms. The indoor and outdoor concentrations of individual PAH in Gliwice were correlated, in Warsaw - they were not. Most probably, the lack of the correlations in Warsaw was due to the existence of an unidentified indoor source of gaseous PAH enriching PM in phenanthrene, fluorene, and pyrene. Although the ambient concentrations of PM -bound PAH were low compared to the ones observed earlier at both sites, they were much higher than in other urbanized European areas. However, because of low mass share of heavy PAH in ΣPAH, the various indicators of the health hazard from the 16 PAH mixture were low compared to other regions.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/análise
Poluição do Ar em Ambientes Fechados/análise
Exposição Ambiental/estatística & dados numéricos
Hidrocarbonetos Aromáticos Policíclicos/análise
Instituições Acadêmicas/estatística & dados numéricos
[Mh] Termos MeSH secundário: Poluição do Ar em Ambientes Fechados/estatística & dados numéricos
Fluorenos/análise
Seres Humanos
Material Particulado/análise
Fenantrenos/análise
Polônia
Pirenos/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants); 0 (Fluorenes); 0 (Particulate Matter); 0 (Phenanthrenes); 0 (Polycyclic Aromatic Hydrocarbons); 0 (Pyrenes); 3Q2UY0968A (fluorene); 448J8E5BST (phenanthrene); 9E0T7WFW93 (pyrene)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180227
[St] Status:MEDLINE


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[PMID]:29254896
[Au] Autor:Bizet F; Ipuy M; Bernhard Y; Lioret V; Winckler P; Goze C; Perrier-Cornet JM; Decréau RA
[Ad] Endereço:ICMUB Institute, University Bourgogne - Franche Comté, 9 Avenue Alain Savary, Sciences Mirande, 21078 Dijon, France.
[Ti] Título:Cellular imaging using BODIPY-, pyrene- and phthalocyanine-based conjugates.
[So] Source:Bioorg Med Chem;26(2):413-420, 2018 01 15.
[Is] ISSN:1464-3391
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Fluorescent Probes aimed at absorbing in the blue/green region of the spectrum and emitting in the green/red have been synthesized (as the form of dyads-pentads), studied by spectrofluorimetry, and used for cellular imaging. The synthesis of phthalocyanine-pyrene 1 was achieved by cyclotetramerization of pyrenyldicyanobenzene, whereas phthalocyanine-BODIPY 2c was synthesized by Sonogashira coupling between tetraiodophthalocyanine and meso-alkynylBODIPY. The standard four-steps BODIPY synthesis was applied to the BODIPY-pyrene dyad 3 starting from pyrenecarbaldehyde and dimethylpyrrole. H, C, F, BNMR, ICP, MS, and UV/Vis spectroscopic analyses demonstrated that 2c is a mixture of BODIPY-Pc conjugates corresponding to an average ratio of 2.5 BODIPY per Pc unit, where its bis, tris, tetrakis components could not be separated. Fluorescence emission studies (µM concentration in THF) showed that the design of the probes allowed excitation of their antenna (pyrene, BODIPY) in the blue/green region of the spectrum, and subsequent transfer to the acceptor platform (BODIPY, phthalocyanine) followed by its emission in the green/red (with up to 140-350 nm overall Stokes shifts). The fluorescent probes were used for cellular imaging of B16F10 melanoma cells upon solubilization in 1% DMSO containing RPMI or upon encapsulation in liposomes (injection method). Probes were used at 1-10 µM concentrations, cells were fixed with methanol and imaged by biphoton and/or confocal microscopy, showing that probes could achieve the staining of cells membranes and not the nucleus.
[Mh] Termos MeSH primário: Compostos de Boro/química
Corantes Fluorescentes/química
Indóis/química
Melanoma/diagnóstico
Pirenos/química
[Mh] Termos MeSH secundário: Animais
Corantes Fluorescentes/síntese química
Camundongos
Estrutura Molecular
Células Tumorais Cultivadas
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene); 0 (Boron Compounds); 0 (Fluorescent Dyes); 0 (Indoles); 0 (Pyrenes); 9E0T7WFW93 (pyrene); V5PUF4VLGY (phthalocyanine)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180220
[Lr] Data última revisão:
180220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171220
[St] Status:MEDLINE


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[PMID]:29406113
[Au] Autor:Ni N; Shi R; Liu Z; Bian Y; Wang F; Song Y; Jiang X
[Ad] Endereço:Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China. Electronic address: nni@issas.ac.cn.
[Ti] Título:Effects of biochars on the bioaccessibility of phenanthrene/pyrene/zinc/lead and microbial community structure in a soil under aerobic and anaerobic conditions.
[So] Source:J Environ Sci (China);63:296-306, 2018 Jan.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The immobilization of co-contaminants of organic and inorganic pollutants by biochar is an efficient remediation strategy. However, the effect of biochar amendments on the bioaccessibility of the co-contaminants in dry versus flooded soils has rarely been compared. In batch experiments, bamboo-derived biochar (BB) had a higher sorption capacity for phenanthrene (Phe)/pyrene (Pyr)/zinc (Zn) than corn straw-derived biochar (CB), while CB had a higher sorption capacity for lead (Pb) than BB. After 150days of incubation, the amendments of 2% CB, 0.5% BB and 2% BB effectively suppressed the dissipation and reduced the bioaccessibility of Phe/Pyr by 15.65%/18.02%, 17.07%/18.31% and 25.43%/27.11%, respectively, in the aerobic soils. This effectiveness was more significant than that in the anaerobic soils. The accessible Zn/Pb concentrations were also significantly lower in the aerobic soils than in the anaerobic soils, regardless of treatments. The Gram-negative bacterial biomass and the Shannon-Weaver index in the aerobic soil amended with 2% CB were the highest. The soil microbial community structure was jointly affected by changes in the bioaccessibility of the co-contaminants and the soil physiochemical properties caused by biochar amendments under the two conditions. Therefore, dry land farming may be more reliable than paddy soil cultivation at reducing the bioaccessibility of Phe/Pyr/Zn/Pb and enhancing the soil microbial diversity in the short term.
[Mh] Termos MeSH primário: Microbiologia do Solo
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Carvão Vegetal
Chumbo/análise
Chumbo/toxicidade
Fenantrenos/análise
Fenantrenos/toxicidade
Pirenos
Solo/química
Poluentes do Solo/toxicidade
Zinco/análise
Zinco/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Phenanthrenes); 0 (Pyrenes); 0 (Soil); 0 (Soil Pollutants); 0 (biochar); 16291-96-6 (Charcoal); 2P299V784P (Lead); J41CSQ7QDS (Zinc)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180216
[Lr] Data última revisão:
180216
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


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[PMID]:28934337
[Au] Autor:Teruya K; Oguma A; Nishizawa K; Kamitakahara H; Doh-Ura K
[Ad] Endereço:Department of Neurochemistry, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
[Ti] Título:Pyrene conjugation and spectroscopic analysis of hydroxypropyl methylcellulose compounds successfully demonstrated a local dielectric difference associated with in vivo anti-prion activity.
[So] Source:PLoS One;12(9):e0185357, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Our previous study on prion-infected rodents revealed that hydroxypropyl methylcellulose compounds (HPMCs) with different molecular weights but similar composition and degree of substitution have different levels of long-lasting anti-prion activity. In this study, we searched these HPMCs for a parameter specifically associated with in vivo anti-prion activity by analyzing in vitro chemical properties and in vivo tissue distributions. Infrared spectroscopic and thermal analyses revealed no differences among HPMCs, whereas pyrene conjugation and spectroscopic analysis revealed that the fluorescence intensity ratio of peak III/peak I correlated with anti-prion activity. This correlation was more clearly demonstrated in the anti-prion activity of the 1-year pre-infection treatment than that of the immediate post-infection treatment. In addition, the intensity ratio of peak III/peak I negatively correlated with the macrophage uptake level of HPMCs in our previous study. However, the in vivo distribution pattern was apparently not associated with anti-prion activity and was different in the representative tissues. These findings suggest that pyrene conjugation and spectroscopic analysis are powerful methods to successfully demonstrate local dielectric differences in HPMCs and provide a feasible parameter denoting the long-lasting anti-prion activity of HPMCs in vivo.
[Mh] Termos MeSH primário: Derivados da Hipromelose/química
Derivados da Hipromelose/farmacologia
Proteínas Priônicas/antagonistas & inibidores
Pirenos/química
[Mh] Termos MeSH secundário: Animais
Transporte Biológico
Encéfalo/efeitos dos fármacos
Encéfalo/metabolismo
Impedância Elétrica
Derivados da Hipromelose/metabolismo
Derivados da Hipromelose/farmacocinética
Macrófagos/metabolismo
Camundongos
Peso Molecular
Proteínas Priônicas/metabolismo
Espectroscopia de Infravermelho com Transformada de Fourier
Baço/efeitos dos fármacos
Baço/metabolismo
Relação Estrutura-Atividade
Distribuição Tecidual
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Prion Proteins); 0 (Pyrenes); 3NXW29V3WO (Hypromellose Derivatives); 9E0T7WFW93 (pyrene)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171018
[Lr] Data última revisão:
171018
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170922
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0185357


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[PMID]:28738309
[Au] Autor:Simkovitch R; Gajst O; Zelinger E; Yarden O; Huppert D
[Ad] Endereço:Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel.
[Ti] Título:Irradiation by blue light in the presence of a photoacid confers changes to colony morphology of the plant pathogen Colletotrichum gloeosporioides.
[So] Source:J Photochem Photobiol B;174:1-9, 2017 Sep.
[Is] ISSN:1873-2682
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:We used the photoacid 8-hydroxy-1,3,6-pyrenetrisulfonate (HPTS) that converts blue photons to acidic protons in water, with an efficiency of close to 100%, and determined that this treatment conferred changes to colony morphology of the plant pathogen Colletotrichum gloeosporioides. The time elapsed until hyphal collapse is noticed depends on both the laser intensity in mW/cm , and the concentration of HPTS in the Agar hydrogel. The time elapsed until hyphal collapse is noticed varies by only ±8% at HPTS concentrations of 500µM and at lower concentrations of HPTS the variance increases as the inverse of the concentration. We found that the effect on C. gloeosporioides was photoacid concentration and irradiation dose dependent. In the presence of 500µM of HPTS within the agar hydrogel-based medium, hyphae collapsed after 37±3.5min of irradiation at 405nm at an intensity of 25mW/cm . We propose two mechanisms for such photo-alteration of C. gloeosporioides. One is based on the pH drop in the extracellular environment by the photo-protolytic process that the photoacid molecule undergoes. The second mechanism is based on an intracellular mechanism in which there is an uptake of HPTS into the interior of the fungus. We suggest that both mechanisms for photo-alteration which we found in this study may occur in plants during fungal infection.
[Mh] Termos MeSH primário: Colletotrichum/efeitos dos fármacos
Colletotrichum/efeitos da radiação
Luz
Plantas/microbiologia
Pirenos/farmacologia
Ácidos Sulfônicos/farmacologia
[Mh] Termos MeSH secundário: Colletotrichum/citologia
Meios de Cultura/química
Concentração de Íons de Hidrogênio
Pirenos/química
Ácidos Sulfônicos/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (8-hydroxy-1,3,6-pyrenetrisulfonic acid); 0 (Culture Media); 0 (Pyrenes); 0 (Sulfonic Acids)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171012
[Lr] Data última revisão:
171012
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170725
[St] Status:MEDLINE


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[PMID]:28686888
[Au] Autor:Zeng J; Zhu Q; Wu Y; Chen H; Lin X
[Ad] Endereço:Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Beijing East Road, 71, Nanjing 210008, PR China; Joint Open Laboratory of Soil and the Environment, Hong Kong University and Institute of Soil Science, Chinese Academy of Sciences, N
[Ti] Título:Characterization of a polycyclic aromatic ring-hydroxylation dioxygenase from Mycobacterium sp. NJS-P.
[So] Source:Chemosphere;185:67-74, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Ring-hydroxylating dioxygenases (RHDs) play a critical role in the biodegradation of polycyclic aromatic hydrocarbons (PAHs). In this study, genes pdoAB encoding a dioxygenase capable of oxidizing various PAHs with up to five-ring benzo[a]pyrene were cloned from Mycobacterium sp. NJS-P. The α-subunit of the PdoAB showed 99% and 93% identity to that from Mycobacterium sp. S65 and Mycobacterium sp. py136, respectively. An Escherichia coli expression experiment revealed that the enzyme is able to oxidize anthracene, phenanthrene, pyrene and benzo[a]pyrene, but not to fluoranthene and benzo[a]anthracene. Furthermore, the results of in silico analysis showed that PdoAB has a large substrate-binding pocket satisfying for accommodation of HMW PAHs, and suggested that the binding energy of intermolecular interaction may predict the substrate conversion of RHDs towards HMW PAHs, especially those may have steric constraints on the substrate-binding pocket, such as benzo[a]pyrene and benzo[a]anthracene.
[Mh] Termos MeSH primário: Biodegradação Ambiental
Dioxigenases/genética
Mycobacterium/metabolismo
[Mh] Termos MeSH secundário: Antracenos
Benzo(a)pireno/metabolismo
Fluorenos
Hidroxilação
Mycobacterium/genética
Fenantrenos
Hidrocarbonetos Aromáticos Policíclicos/metabolismo
Pirenos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anthracenes); 0 (Fluorenes); 0 (Phenanthrenes); 0 (Polycyclic Aromatic Hydrocarbons); 0 (Pyrenes); 3417WMA06D (Benzo(a)pyrene); 360UOL779Z (fluoranthene); 448J8E5BST (phenanthrene); 9E0T7WFW93 (pyrene); EC 1.13.11.- (Dioxygenases); EH46A1TLD7 (anthracene)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170708
[St] Status:MEDLINE


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[PMID]:28646397
[Au] Autor:Perez-Maldonado IN; Ochoa-Martinez AC; Orta-Garcia ST; Ruiz-Vera T; Varela-Silva JA
[Ad] Endereço:Laboratorio de Toxicología Molecular, Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Coordinación para la Innovación y Aplicación de la Ciencia y la Tecnología (CIACYT), Universidad Autónoma de San Luis Potosí, Avenida Sierra Leona No. 550, Colonia Lomas Segunda Sección, 78210, San Lu
[Ti] Título:Concentrations of Environmental Chemicals in Urine and Blood Samples of Children from San Luis Potosí, Mexico.
[So] Source:Bull Environ Contam Toxicol;99(2):258-263, 2017 Aug.
[Is] ISSN:1432-0800
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Human biomonitoring (HBM) is an appreciated tool used to evaluate human exposure to environmental, occupational or lifestyle chemicals. Therefore, the aim of this study was to evaluate the exposure levels for environmental chemicals in urine and blood samples of children from San Luis Potosí, Mexico (SLP). This study identifies environmental chemicals of concern such as: arsenic (45.0 ± 15.0 µg/g creatinine), lead (5.40 ± 2.80 µg/dL), t,t-muconic acid (266 ± 220 µg/g creatinine), 1-hydroxypyrene (0.25 ± 0.15 µmol/mol creatinine), PBDEs (28.0 ± 15.0 ng/g lipid), and PCBs (33.0 ± 16.0 ng/g lipid). On the other hand, low mercury (1.25 ± 1.00 µg/L), hippuric acid (0.38 ± 0.15 µg/g creatinine) and total DDT (130 ± 35 ng/g lipid) exposure levels were found. This preliminary study showed the tool's utility, as the general findings revealed chemicals of concern. Moreover, this screening exhibited the need for HBM in the general population of SLP.
[Mh] Termos MeSH primário: Exposição Ambiental/análise
Poluentes Ambientais/metabolismo
[Mh] Termos MeSH secundário: Arsênico/sangue
Arsênico/urina
Criança
Exposição Ambiental/estatística & dados numéricos
Monitoramento Ambiental
Poluentes Ambientais/sangue
Poluentes Ambientais/urina
Feminino
Éteres Difenil Halogenados/sangue
Éteres Difenil Halogenados/urina
Hipuratos/sangue
Hipuratos/urina
Seres Humanos
Masculino
México
Bifenilos Policlorados/sangue
Bifenilos Policlorados/urina
Pirenos/sangue
Pirenos/urina
Ácido Sórbico/análogos & derivados
Ácido Sórbico/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Halogenated Diphenyl Ethers); 0 (Hippurates); 0 (Pyrenes); 3KD92ZL2KH (muconic acid); DFC2HB4I0K (Polychlorinated Biphenyls); N2H6O5V707 (1-hydroxypyrene); N712M78A8G (Arsenic); TE0865N2ET (hippuric acid); X045WJ989B (Sorbic Acid)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170822
[Lr] Data última revisão:
170822
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170625
[St] Status:MEDLINE
[do] DOI:10.1007/s00128-017-2130-6


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[PMID]:28641227
[Au] Autor:Li Y; Long L; Ge J; Yang LX; Cheng JJ; Sun LX; Lu C; Yu XY
[Ad] Endereço:Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, 50 Zhongling Street, Nanjing, 210014, China; Institute of Food Quality and Safety, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China.
[Ti] Título:Presence, distribution and risk assessment of polycyclic aromatic hydrocarbons in rice-wheat continuous cropping soils close to five industrial parks of Suzhou, China.
[So] Source:Chemosphere;184:753-761, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Polycyclic aromatic hydrocarbons (PAHs) accumulated in agricultural soils are likely to threaten human health and ecosystem though the food chain, therefore, it is worth to pay more attention to soil contamination by PAHs. In this study, the presence, distribution and risk assessment of 16 priority PAHs in rice-wheat continuous cropping soils close to industrial parks of Suzhou were firstly investigated. The concentrations of the total PAHs ranged from 125.99 ng/g to 796.65 ng/g with an average of 352.94 ng/g. Phenanthrene (PHE), fluoranthene (FLT), benzo [a] anthracene (BaA) and pyrene (PYR) were the major PAHs in those soil samples. The highest level of PAHs was detected in the soils around Chemical plant and Steelworks, followed by Printed wire board, Electroplate Factory and Paper mill. The composition of PAHs in the soils around Chemical plant was dominated by 3-ring PAHs, however, the predominant compounds were 4, 5-ring PAHs in the soils around other four factories. Meanwhile, the concentration of the total PAHs in the soils close to the factories showed a higher level of PAHs in November (during rice harvest) than that in June (during wheat harvest). Different with other rings of PAHs, 3-ring PAHs in the soils around Chemical plant and Steelworks had a higher concentration in June. The results of principal component analysis and isomeric ratio analysis suggested that PAHs in the studied areas mainly originated from biomass, coal and petroleum combustion. The risk assessment indicated that higher carcinogenic risk was found in those sites closer to the industrial park.
[Mh] Termos MeSH primário: Agricultura
Monitoramento Ambiental
Hidrocarbonetos Aromáticos Policíclicos/análise
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: Antracenos
Carcinógenos/análise
China
Carvão Mineral/análise
Fluorenos
Seres Humanos
Indústrias
Oryza
Petróleo/análise
Fenantrenos
Pirenos
Medição de Risco
Solo/química
Triticum
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anthracenes); 0 (Carcinogens); 0 (Coal); 0 (Fluorenes); 0 (Petroleum); 0 (Phenanthrenes); 0 (Polycyclic Aromatic Hydrocarbons); 0 (Pyrenes); 0 (Soil); 0 (Soil Pollutants); 360UOL779Z (fluoranthene); 448J8E5BST (phenanthrene); 9E0T7WFW93 (pyrene); EH46A1TLD7 (anthracene)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170623
[St] Status:MEDLINE


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[PMID]:28600683
[Au] Autor:Rimayi C; Chimuka L; Odusanya D; de Boer J; Weiss JM
[Ad] Endereço:Department of Water and Sanitation, Resource Quality Information Services (RQIS), Roodeplaat, P. Bag X313, Pretoria, 0001, South Africa. rimayic@dws.gov.za.
[Ti] Título:Source characterisation and distribution of selected PCBs, PAHs and alkyl PAHs in sediments from the Klip and Jukskei Rivers, South Africa.
[So] Source:Environ Monit Assess;189(7):327, 2017 Jul.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A study of the distribution of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) utilising 16 priority PAHs, benzo(e)pyrene, perylene, 19 alkylated PAHs and 31 ortho substituted PCBs in South Africa is presented. It was aimed to (a) deduce characteristic contamination patterns for both PCBs and PAHs and (b) provide the first comprehensive dataset for establishment of source characterisation of PCBs and PAHs. This is in line with new South African legislation on mandatory monitoring of PCB and PAH emissions. Bar charts, principal component analysis (PCA) and biplots were utilised to identify signature contamination patterns and distribution of PCBs and PAHs within the Jukskei and Klip Rivers. Sediments from the Jukskei and Klip River catchments both showed distinct contamination signatures for hexa to nonachlorinated PCBs, characteristic of contamination by Aroclor 1254 and 1260 technical mixtures. PCB signature patterns in order of abundance were 138 > 180 > 206 > 153 > 187 > 149 and 138 > 153 > 180 > 149 > 187 > 110 > 170 for the Jukskei and Klip River sediments, respectively. The upstream Alberton point had the highest Σ31 PCB and Σ (parent+alkyl) PAH concentrations in the Klip River of 61 and 6000 µg kg dry weight (dw), respectively. In the Jukskei River, the upstream Marlboro point had the highest Σ31 PCB concentration of 19 µg kg dw and the N14 site recorded the highest Σ (parent+alkyl) PAH concentration of 2750 µg kg dw. PAH concentrations in both the Jukskei and Klip Rivers were significantly higher than the PCB concentrations. Fluoranthene, phenanthrene and pyrene were found in the highest concentrations in both the Jukskei and Klip River sediments. Both the Jukskei and Klip River sediments showed trends of a mixed pyrogenic-petrogenic PAH source contamination.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Bifenilos Policlorados/análise
Hidrocarbonetos Aromáticos Policíclicos/análise
Rios/química
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Sedimentos Geológicos/análise
Sedimentos Geológicos/química
Pirenos
África do Sul
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Polycyclic Aromatic Hydrocarbons); 0 (Pyrenes); 0 (Water Pollutants, Chemical); 9E0T7WFW93 (pyrene); DFC2HB4I0K (Polychlorinated Biphenyls)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170718
[Lr] Data última revisão:
170718
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170611
[St] Status:MEDLINE
[do] DOI:10.1007/s10661-017-6043-y


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[PMID]:28582767
[Au] Autor:Kim PG; Roh JY; Hong Y; Kwon JH
[Ad] Endereço:Division of Environmental Science and Ecological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea.
[Ti] Título:Effects of soil water saturation on sampling equilibrium and kinetics of selected polycyclic aromatic hydrocarbons.
[So] Source:Chemosphere;184:86-92, 2017 Oct.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Passive sampling can be applied for measuring the freely dissolved concentration of hydrophobic organic chemicals (HOCs) in soil pore water. When using passive samplers under field conditions, however, there are factors that might affect passive sampling equilibrium and kinetics, such as soil water saturation. To determine the effects of soil water saturation on passive sampling, the equilibrium and kinetics of passive sampling were evaluated by observing changes in the distribution coefficient between sampler and soil (K ) and the uptake rate constant (k ) at various soil water saturations. Polydimethylsiloxane (PDMS) passive samplers were deployed into artificial soils spiked with seven selected polycyclic aromatic hydrocarbons (PAHs). In dry soil (0% water saturation), both K and k values were much lower than those in wet soils likely due to the contribution of adsorption of PAHs onto soil mineral surfaces and the conformational changes in soil organic matter. For high molecular weight PAHs (chrysene, benzo[a]pyrene, and dibenzo[a,h]anthracene), both K and k values increased with increasing soil water saturation, whereas they decreased with increasing soil water saturation for low molecular weight PAHs (phenanthrene, anthracene, fluoranthene, and pyrene). Changes in the sorption capacity of soil organic matter with soil water content would be the main cause of the changes in passive sampling equilibrium. Henry's law constant could explain the different behaviors in uptake kinetics of the selected PAHs. The results of this study would be helpful when passive samplers are deployed under various soil water saturations.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Hidrocarbonetos Aromáticos Policíclicos/análise
Poluentes do Solo/análise
Solo/química
[Mh] Termos MeSH secundário: Adsorção
Antracenos
Dimetilpolisiloxanos
Monitoramento Ambiental/métodos
Fluorenos
Cinética
Compostos Orgânicos
Fenantrenos
Hidrocarbonetos Aromáticos Policíclicos/química
Pirenos
Poluentes do Solo/química
Água/química
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anthracenes); 0 (Dimethylpolysiloxanes); 0 (Fluorenes); 0 (Organic Chemicals); 0 (Phenanthrenes); 0 (Polycyclic Aromatic Hydrocarbons); 0 (Pyrenes); 0 (Soil); 0 (Soil Pollutants); 0 (Water Pollutants, Chemical); 059QF0KO0R (Water); 360UOL779Z (fluoranthene); 448J8E5BST (phenanthrene); 63148-62-9 (baysilon); 9E0T7WFW93 (pyrene); EH46A1TLD7 (anthracene)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170606
[St] Status:MEDLINE



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