Showing 1-30 of 33 results for "131326"
J I Cacho et al.
Talanta, 195, 796-799 (2019-01-11)
A device for headspace sorptive extraction (HSSE) combined with gas chromatography separation and mass spectrometry detection (GC-MS) is presented. The gadget is based on a simple magnetic disk that permits the stir bar to be placed at the top of...
G R Liu et al.
Bulletin of environmental contamination and toxicology, 86(5), 535-538 (2011-03-29)
Six species of unintentionally produced persistent organic pollutions comprised of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, polychlorinated biphenyls, polychlorinated naphthalenes, hexachlorobenzene and pentachlorobenzene in soils collected from Shanxi province, China were determined. The sum toxic equivalent ranged from 0.14 to 2.20 with...
Ian J Allan et al.
The Science of the total environment, 423, 125-131 (2012-03-17)
Freely dissolved pore water concentrations of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), penta- and hexachlorobenzene (PeCB and HCB), octachlorostyrene (OCS), p,p'-DDE and p,p'-DDD were measured in bottom sediments from three sites in Norway. Sediments were from Aker Brygge, site...
Yongfang Li et al.
Environmental monitoring and assessment, 184(5), 3085-3094 (2011-06-30)
As facile "environmental media", the outdoor dust may reflect the changes of contaminants in environment more promptly. In the present study, selected organochlorine contaminants (OCs) include hexachlorocyclohexanes (HCHs), dichlorodiphenyltrichloroethanes (DDTs), hexachlorobenzene (HCB), and pentachlorobenzene (PeCB) were detected in 20 outdoor...
Zhong-Zhi Yang et al.
Bulletin of environmental contamination and toxicology, 86(1), 38-42 (2010-12-17)
Five higher chlorinated benzenes (CBs), include hexachlorobenzene (HCB), pentachlorobenzene (PeCB) and three isomers of tetrachlorobenzens, were analyzed in 20 outdoor dust samples collected from a fast developing city, Xinxiang. Only HCB was detected in all outdoor dust samples. The dominate...
Gloria Grueiro Noche et al.
Analytical and bioanalytical chemistry, 405(21), 6739-6748 (2013-06-20)
A fully automated method consisting of microextraction by packed sorbent (MEPS) coupled directly to programmed temperature vaporizer-gas chromatography-mass spectrometry (PTV-GC-MS) has been developed to determine the 12 chlorobenzene congeners (chlorobenzene; 1,2-, 1,3-, and 1,4-dichlorobenzene; 1,2,3-, 1,2,4-, and 1,3,5-trichlorobenzene; 1,2,3,4-, 1,2,3,5-...
Lance J Schuler et al.
Environmental toxicology and chemistry, 26(6), 1248-1257 (2007-06-19)
The whole-body residues of pentachlorobenzene (PCBz) and fluoranthene (FLU) in Hyalella azteca and Chironomus tentans were determined for a variety of chronic sublethal effects. The endpoints evaluated for H. azteca included 28-d growth and survival and 42-d growth, survival, and...
Marek Matejczyk et al.
Chemosphere, 82(7), 1017-1023 (2010-11-23)
The leachates from 22 municipal solid waste (MSW) landfill sites in Southern Poland were characterized by evaluation of chemical, microbiological and ecotoxicological parameters. Chemical analyses were mainly focused on the identification of the priority hazardous substances according to Directive on...
A A Toropov et al.
European journal of medicinal chemistry, 43(4), 714-740 (2007-07-17)
Simplified molecular input line entry system (SMILES) has been utilized in constructing quantitative structure-property relationships (QSPR) for octanol/water partition coefficient of vitamins and organic compounds of different classes by optimal descriptors. Statistical characteristics of the best model (vitamins) are the...
Barry C Kelly et al.
Science (New York, N.Y.), 317(5835), 236-239 (2007-07-14)
Substances that accumulate to hazardous levels in living organisms pose environmental and human-health risks, which governments seek to reduce or eliminate. Regulatory authorities identify bioaccumulative substances as hydrophobic, fat-soluble chemicals having high octanol-water partition coefficients (K(OW))(>/=100,000). Here we show that...
Ewa Ł Gregoraszczuk et al.
Reproductive toxicology (Elmsford, N.Y.), 31(4), 494-499 (2011-02-08)
In the current study, we determined in vitro accumulation of hexachlorobenzene (HCBz) and pentachlorobenzene (PeCBz) in porcine ovarian follicles, the effect on steroidogenesis and the expression of enzymes responsible for steroid synthesis. Sixty percent of the HCBz and almost 100%...
Yanling Qiu et al.
Chemosphere, 75(1), 78-82 (2009-01-21)
An existing substitution reaction method was improved as part of a system to measure the persistency of selected chemicals in the environment by evaluating their chemical reactivity. Hexachlorobenzene (HCB), pentachlorobenzene, 1,2,4,5-tetrachlorobenzene and 1,2,4-trichlorobenzene were selected as model compounds. Sodium methoxide...
Didem Okutman Tas et al.
Biotechnology and bioengineering, 105(3), 574-587 (2009-10-07)
The distribution of product isomers during the sequential reductive dechlorination of pentachloroaniline (PCA) and pentachlorobenzene (PeCB) was examined based on calculated thermodynamic, chromatographic, and electronic properties and then compared to the product distribution achieved by enrichment cultures. The dechlorination pathway...
Hongmei Hu et al.
Journal of chromatographic science, 52(5), 375-382 (2013-05-07)
A simple, rapid, sensitive and high throughput method is described, based on solid-phase disk extraction (SPDE) and gas chromatography-electron capture detection, for the determination of chlorobenzens (CBs) in water samples. The proposed SPDE sample pretreatment method was initially optimized and...
Wenbin Liu et al.
Chemosphere, 86(3), 248-251 (2011-10-25)
The production of chloranil is regarded as a potentially significant source of unintentional POPs. This research aimed to identify the contamination levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), hexachlorobenzene (HxCBz), pentachlorobenzene (PeCBz) and polychlorophenols in chloranil samples...
Alice Dvorska et al.
Environmental pollution (Barking, Essex : 1987), 156(2), 403-408 (2008-05-23)
The regional observatory Kosetice is a central European background station. Unique continuous monitoring from 1988 on is held here. POP (persistent organic pollutant) concentration values of air samples from Kosetice taken between 1996 and 2005 were statistically processed. Values of...
Heyun Fu et al.
Environmental pollution (Barking, Essex : 1987), 232, 402-410 (2017-10-03)
Dissolved black carbon (DBC), the soluble fraction of black carbon (BC), is an important constituent of dissolved organic matter pool. However, little is known about the binding interactions between hydrophobic organic contaminants (HOCs) and DBC and their significance in the...
Cui-Ying Liu et al.
Huan jing ke xue= Huanjing kexue, 34(4), 1583-1589 (2013-06-27)
A rice pot experiment was conducted in two soils, Hydragric Acrisols (Ac) and Gleyi-Stagnic Anthrosols (An). Three treatments including control and additions of 1% or 2% composting organic fertilizer were designed for each soil. The objective of this research was...
N Martí et al.
Marine pollution bulletin, 62(3), 615-625 (2011-02-08)
A comprehensive study aimed at evaluating the occurrence, significance of concentrations and spatial distribution of priority pollutants (PPs) along the Comunidad Valenciana coastal waters (Spain) was carried out in order to fulfil the European Water Framework Directive (WFD). Additionally, PP...
Lance J Schuler et al.
Chemosphere, 77(3), 399-403 (2009-08-14)
Nonpolar organic chemicals such as polycyclic aromatic hydrocarbons and chlorobenzenes are expected to act additively when exposed as a mixture. The present study examined the toxicity of fluoranthene (FLU) and pentachlorobenzene (PCBz) individually and in a binary mixture using the...
Ott Roots et al.
Environmental science and pollution research international, 17(3), 740-749 (2009-04-08)
Passive air sampling survey of the Central and Eastern Europe was initiated in 2006. This paper presents data on toxic organic compounds such as polychlorinated biphenyls (PCB 28, 52, 101, 118, 153, 138, and 180), hexachlorobenzene (HCB), pentachlorobenzene (PeCB), hexachlorocyclohexane...
Ian John Allan et al.
Journal of environmental monitoring : JEM, 13(9), 2420-2426 (2011-07-27)
Thirty two polychlorinated biphenyl congeners (PCBs), hexachlorobenzene (HCB) and pentachlorobenzene (PeCB) were analysed in passive sampler extracts from surface water-exposed semipermeable membrane devices (SPMDs) and in bed sediment samples from a small urban watercourse, the River Alna (Oslo, Norway). Performance...
Yong-Guang Du et al.
Huan jing ke xue= Huanjing kexue, 31(11), 2774-2779 (2011-01-22)
The formation processes of PCDD/Fs from pentachlorobenzene catalyzed by CuO under heating conditions were investigated. The results showed that, the amount of the formed PCDD/Fs increased with the temperature from 200 degrees C to 350 degrees C, and then decreased...
Zhiqiang Nie et al.
Chemosphere, 85(11), 1707-1712 (2011-10-26)
Magnesium production is considered to be one potential source of unintentional persistent organic pollutants (unintentional POPs). However, studies on the emissions of unintentional POPs from magnesium metallurgy are still lacking. Emissions of unintentional POPs, such as polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs), dioxin-like...
Zhenzhen Xu et al.
Chemosphere, 87(9), 1032-1038 (2012-01-28)
Pentachlorobenzene (PeCB) in simulated flue gas was destructed by a commercial V(2)O(5)-WO(3)/TiO(2) catalyst in this study. The effects of reaction temperature, oxygen concentration, space velocity and some co-existing pollutants on PeCB conversion were investigated. Furthermore, a possible mechanism for the...
Robert E Bailey et al.
Chemosphere, 75(5), 555-564 (2009-03-21)
There are no longer any large scale uses of pentachlorobenzene (PeCB). Current emissions of PeCB to the environment are estimated to be about 121000kgy(-1), based on published information. The largest sources appear to be combustion of solid wastes, 32000kgy(-1), biomass...
D E Balampanis et al.
Waste management (New York, N.Y.), 30(7), 1318-1324 (2010-03-17)
Waste thermal treatment in Europe is moving towards the utilisation of the combustible output of mechanical, biological treatment (MBT) plants. The standardisation of solid recovered fuels (SRF) is expected to support this trend and increase the amount of the generated...
Guorui Liu et al.
Environmental science & technology, 43(24), 9196-9201 (2009-12-17)
The coking process is considered to be a potential source of unintentionally produced persistent organic pollutants (UP-POPs). However, intensive studies on the emission of UP-POPs from the coking industry are still very scarce. Emission of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs), dioxin-like polychlorinated...
Synthesis of bridgehead fluorides by fluorodeiodination.
Della EW and Head NJ. et al.
The Journal of Organic Chemistry, 57(10), 2850-2855 (1992)
Daniel Carrizo et al.
Ecotoxicology and environmental safety, 71(1), 260-266 (2007-10-16)
The study of a population of 4-year-old children born between 1997 and 1999 in an urban area under strong inputs of pentachlorobenzene (PeCB) and hexachlorobenzene (HCB) suggested that the measured concentrations of pentachlorophenol (PCP) in serum may essentially result from...

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