keyword
MENU ▼
Read by QxMD icon Read
search

Coke

keyword
https://www.readbyqxmd.com/read/28213229/fast-method-to-quantify-pahs-in-contaminated-soils-by-direct-thermodesorption-using-analytical-pyrolysis
#1
C Biache, C Lorgeoux, A Saada, S Colombano, P Faure
A method for polycyclic aromatic hydrocarbon (PAH) quantification, based on pyrolysis at 450°C combined with gas chromatography coupled with mass spectrometry and flame ionization detection (Py-GC-MS/FID), was developed and compared to a conventional PAH quantification method using accelerated solvent extraction and GC-MS analyses. The PAH contents of three coking plant soils, one gas plant soil, two wood-treating facility soils and one certified reference material (CRM - BCR 524) were determined using both methods...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28194458/an-assessment-of-hydrocarbon-species-in-the-methanol-to-hydrocarbon-reaction-over-a-zsm-5-catalyst
#2
Suwardiyanto, Russell F Howe, Emma K Gibson, C Richard A Catlow, Ali Hameed, James McGregor, Paul Collier, Stewart F Parker, David Lennon
A ZSM-5 catalyst is examined in relation to the methanol-to-hydrocarbon (MTH) reaction as a function of reaction temperature and time-on-stream. The reaction profile is characterised using in-line mass spectrometry. Furthermore, the material contained within a catch-pot downstream from the reactor is analysed using gas chromatography-mass spectrometry. For a fixed methanol feed, reaction conditions are selected to define various stages of the reaction coordinate: (i) initial methanol adsorption at a sub-optimum reaction temperature (1 h at 200 °C); (ii) initial stages of reaction at an optimised reaction temperature (1 h at 350 °C); (iii) steady-state operation at an optimised reaction temperature (3 days at 350 °C); and (iv) accelerated ageing (3 days at 400 °C)...
February 14, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28192674/designing-visual-aids-that-promote-risk-literacy
#3
Rocio Garcia-Retamero, Edward T Cokely
Background Effective risk communication is essential for informed decision making. Unfortunately, many people struggle to understand typical risk communications because they lack essential decision-making skills. Objective The aim of this study was to review the literature on the effect of numeracy on risk literacy, decision making, and health outcomes, and to evaluate the benefits of visual aids in risk communication. Method We present a conceptual framework describing the influence of numeracy on risk literacy, decision making, and health outcomes, followed by a systematic review of the benefits of visual aids in risk communication for people with different levels of numeracy and graph literacy...
February 1, 2017: Human Factors
https://www.readbyqxmd.com/read/28187969/seasonal-changes-of-polycyclic-aromatic-hydrocarbons-in-response-to-hydrology-and-anthropogenic-activities-in-the-pearl-river-estuary-china
#4
Feng Liu, Lixia Niu, Hui Chen, Ping Li, Feng Tian, Qingshu Yang
The behaviours of PAHs (containing 2-6 aromatic rings) in the Pearl River estuary were examined each month in 2011. This study was designed to investigate the abundance of 16 priority PAHs and their response to the seasonal dynamics of anthropogenic activities and hydrological cycles. Monthly mean concentrations of ∑16PAHs in water and suspended particulate matter (SPM) were 88.31ng/L and 252.31ng/L respectively, with higher concentrations in the wet season (April to September). Heavy precipitation in the wet season resulted in relatively increased PAH input via riverine discharges and atmospheric deposition...
February 7, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28186749/aedes-aegypti-larvicidal-sesquiterpene-alkaloids-from-maytenus-oblongata
#5
Seindé Touré, Charlotte Nirma, Michael Falkowski, Isabelle Dusfour, Isabelle Boulogne, Arnaud Jahn-Oyac, Maïra Coke, Didier Azam, Romain Girod, Céline Moriou, Guillaume Odonne, Didier Stien, Emeline Houël, Véronique Eparvier
Four new sesquiterpene alkaloids (1-4) with a β-dihydroagrofuran skeleton and a new triterpenoid (5) were isolated from an ethyl acetate extract of Maytenus oblongata stems. Their structures were elucidated using 1D and 2D NMR spectroscopy as well as MS and ECD experiments. The M. oblongata stem EtOAc extract and the pure compounds isolated were tested for larvicidal activity against Aedes aegypti under laboratory conditions, and compounds 2 and 3 were found to be active.
February 24, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28186217/time-and-space-resolved-study-of-the-methanol-to-hydrocarbons-mth-reaction-influence-of-zeolite-topology-on-axial-deactivation-patterns
#6
Daniel Rojo-Gama, Samaneh Etemadi, Eliot Kirby, Karl Petter Lillerud, Pablo Beato, Stian Svelle, Unni Olsbye
Zeolites representing seven different topologies were subjected to life-time assessment studies as methanol to hydrocarbons (MTH) catalysts at 400 °C, P(MeOH) = 13 kPa and P(tot) = 100 kPa. The following topologies were studied: ZSM-22 (TON), ZSM-23 (MTT), IM-5 (IMF), ITQ-13 (ITH), ZSM-5 (MFI), mordenite (MOR) and beta (BEA). Two experimental approaches were used. In the first approach, each catalyst was tested at three different contact times, all giving 100% initial conversion. The life-time before conversion decreased to 50% at each contact time was measured and used to calculate critical contact times (i...
February 10, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28184397/carbon-induced-selective-regulation-of-cobalt-based-fischer-tropsch-catalysts-by-ethylene-treatment
#7
Peng Zhai, Pei-Pei Chen, Jinglin Xie, Jin-Xun Liu, Huabo Zhao, Lili Lin, Bo Zhao, Hai-Yan Su, Qingjun Zhu, Wei-Xue Li, Ding Ma
Various carbonaceous species were controllably deposited on Co/Al2O3 catalysts using ethylene as carbon source during the activation process for Fischer-Tropsch synthesis (FTS). Atomic, polymeric and graphitic carbon were distinguished by Raman spectroscopy, thermoanalysis and temperature programmed hydrogenation. Significant changes occurred in both the catalytic activity and selectivity toward hydrocarbon products after ethylene treatment. The activity decreased along with an increase in CH4 selectivity, at the expense of a remarkable decrease of heavy hydrocarbon production, resulting in enhanced selectivity for the gasoline fraction...
February 10, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28181800/vanadium-geochemistry-of-oil-sands-fluid-petroleum-coke
#8
Jake A Nesbitt, Matthew B J Lindsay
Vanadium has previously been linked to elevated toxicity of leachates derived from oil sands petroleum coke. However, geochemical controls on V mobility within coke deposits remain poorly constrained. Detailed examinations of porewater and solid-phase V geochemistry were therefore performed on oil sands fluid petroleum coke deposits in Alberta, Canada. Sample collection focused on both active and reclaimed deposits, which contained more than 3 × 10(7) m(3) of fluid petroleum coke. Dissolved V concentrations were highest (up to 3...
February 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28181029/smoking-modify-the-effects-of-polycyclic-aromatic-hydrocarbons-exposure-on-oxidative-damage-to-dna-in-coke-oven-workers
#9
Jin Yang, Hongjie Zhang, Huitao Zhang, Wubin Wang, Yanli Liu, Yanfeng Fan
PURPOSE: Coke oven emissions containing polycyclic aromatic hydrocarbons (PAHs) are predominant toxic constituents of particulate air pollution that have been linked to increased risk of lung cancer. Numerous epidemiological studies have suggested that oxidative DNA damage may play a pivotal role in the carcinogenic mechanism of lung cancer. Little is known about the effect of interaction between PAHs exposure and lifestyle on DNA oxidative damage. METHODS: The study population is composed by coke oven workers (365) and water treatment workers (144), and their urinary levels of four PAH metabolites and 8-hydroxydeoxyguanosine (8-OHdG) were determined...
February 8, 2017: International Archives of Occupational and Environmental Health
https://www.readbyqxmd.com/read/28177427/erlotinib-and-acid-suppressive-agents-is-it-worth-to-take-a-coke
#10
A Retamero, D Conde-Estévez
No abstract text is available yet for this article.
January 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28163792/effect-of-feedstock-and-catalyst-impurities-on-the-methanol-to-olefin-reaction-over-h-sapo-34
#11
Charlotte Vogt, Bert M Weckhuysen, Javier Ruiz-Martínez
Operando UV/Vis spectroscopy with on-line mass spectrometry was used to study the effect of different types of impurities on the hydrocarbon pool species and the activity of H-SAPO-34 as a methanol-to-olefins (MTO) catalyst. Successive reaction cycles with different purity feedstocks were studied, with an intermittent regeneration step. The combined study of two distinct impurity types (i.e., feed and internal impurities) leads to new insights into MTO catalyst activation and deactivation mechanisms. In the presence of low amounts of feed impurities, the induction and active periods of the process are prolonged...
January 9, 2017: ChemCatChem
https://www.readbyqxmd.com/read/28131481/association-of-polycyclic-aromatic-hydrocarbons-metabolites-and-risk-of-diabetes-in-coke-oven-workers
#12
Liangle Yang, Kai Yan, Dan Zeng, Xuefeng Lai, Xuguang Chen, Qin Fang, Huan Guo, Tangchun Wu, Xiaomin Zhang
Elevated polycyclic aromatic hydrocarbons (PAHs) metabolites have recently been linked to increased risk of diabetes in the general population, but little is known about the risk of diabetes due to high pollution levels of PAHs exposure. We aimed to examine whether occupational exposure to PAHs would be one of the important risk factors for diabetes in the coke oven workers. A total of 1472 coke oven workers with complete data were qualified for the present study. We measured 12 urinary monohydroxy polycyclic aromatic hydrocarbons (OH-PAHs) by gas chromatography-mass spectrometry (GC-MS)...
April 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28117577/one-pot-synthesis-of-mesoporous-ni-ti-al-ternary-oxides-highly-active-and-selective-catalysts-for-steam-reforming-of-ethanol
#13
Alexandre A S Gonçalves, Patrícia B Faustino, José M Assaf, Mietek Jaroniec
One-pot synthesis of nanostructured ternary oxides of Ni, Al, and Ti was designed and performed via evaporation induced self-assembly (EISA). For the purpose of comparison, analogous oxides were also prepared by the impregnation method. The resulting materials were applied in two catalytic reactions: steam reforming of ethanol (SRE) for H2 production (subjected to prior activation with H2) and ethanol dehydration (ED; used without prior activation), to in situ analyze carbon accumulation by ethylene depletion when ethanol interacts with acidic sites present on the support...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28107720/enhanced-treatment-performance-of-coking-wastewater-and-reduced-membrane-fouling-using-a-novel-embr
#14
Bei Jiang, Cong Du, Shengnan Shi, Liang Tan, Meidi Li, Jiaxin Liu, Lanlan Xue, Xiangyu Ji
A novel EMBR (electric field applied in MBR) by placing stainless steel mesh cathode inside a flat membrane module and stainless steel mesh anode outside the module was built and operated to enhance the treatment performance of coking wastewater containing phenol, pyridine and quinoline and reduce the membrane fouling. The degradation rates of COD, phenol, pyridine and quinoline in EMBR with electric field (reactor A) were significantly higher than the sum of EMBR without electric field (reactor B) and only electro-catalytic degradation during the long-term treatment, confirming that a coupling effect was existed between biodegradation and electro-catalytic degradation process...
April 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28107710/in-vivo-assesment-of-the-genotoxic-and-oxidative-stress-effects-of-particulate-matter-on-echinogammarus-veneris
#15
Melissa Marcoccia, Lucilla Ronci, Elvira De Matthaeis, Andrea Setini, Cinzia Perrino, Silvia Canepari
Seven types of atmospheric dusts (road dust, soil dust, brake dust, desert dust, pellet ash and coke and certified material NIST1648a - urban dust) have been tested for their genotoxicity on specimens of Echinogammarus veneris, a small aquatic amphipod. Experiments were carried out in vivo, by exposing the animals for 24 h to water containing 25 mg/L of dust. Each dust has been chemically analyzed for ions, elemental carbon, organic carbon and for the soluble and insoluble fractions of elements. Non-specific damages to DNA have been evaluated by the comet test, while oxidative damages have been estimated by coupling the comet test with formamido pyrimidine DNA glycosylase reaction...
January 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28068645/characteristics-of-pah-tar-oil-contaminated-soils-black-particles-resins-and-implications-for-treatment-strategies
#16
Clément Trellu, Anja Miltner, Rosita Gallo, David Huguenot, Eric D van Hullebusch, Giovanni Esposito, Mehmet A Oturan, Matthias Kästner
Tar oil contamination is a major environmental concern due to health impacts of polycyclic aromatic hydrocarbons (PAH) and the difficulty of reaching acceptable remediation end-points. Six tar oil-contaminated soils with different industrial histories were compared to investigate contamination characteristics by black particles. Here we provide a simple method tested on 6 soils to visualize and identify large amounts of black particles (BP) as either solid aggregates of resinified and weathered tar oil or various wood/coke/coal-like materials derived from the contamination history...
December 31, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28051131/nitrogen-doped-carbon-derived-from-zif-8-as-a-high-performance-metal-free-catalyst-for-acetylene-hydrochlorination
#17
Songlin Chao, Fang Zou, Fanfan Wan, Xiaobin Dong, Yanlin Wang, Yuxuan Wang, Qingxin Guan, Guichang Wang, Wei Li
Acetylene hydrochlorination is a major industrial technology for manufacturing vinyl chloride monomer in regions with abundant coal resources; however, it is plagued by the use of mercury(II) chloride catalyst. The development of a nonmercury catalyst has been extensively explored. Herein, we report a N-doped carbon catalyst derived from ZIF-8 with both high activity and quite good stability. The acetylene conversion reached 92% and decreased slightly during a 200 h test at 220 °C and atmospheric pressure...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28049073/variations-in-toxicity-of-semi-coking-wastewater-treatment-processes-and-their-toxicity-prediction
#18
Xiaoyan Ma, Xiaochang Wang, Yongjun Liu, Jian Gao, Yongkun Wang
Chemical analyses and bioassays using Vibrio fischeri and Daphnia magna were conducted to evaluate comprehensively the variation of biotoxicity caused by contaminants in wastewater from a semi-coking wastewater treatment plant (WWTP). Pretreatment units (including an oil-water separator, a phenols extraction tower, an ammonia stripping tower, and a regulation tank) followed by treatment units (including anaerobic-oxic treatment units, coagulation-sedimentation treatment units, and an active carbon adsorption column) were employed in the semi-coking WWTP...
April 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28043266/-relationship-between-urinary-polycyclic-aromatic-hydrocarbon-metabolite-and-cell-cycle-of-lymphocyte-in-coke-oven-workers
#19
B L Pan, H T Zhang, H J Zhang, W T Chen, J Yang
Objective: To investigate the relationship between urinary polycyclic aromatic hydrocarbon metabolite and cell cycle of lymphocyte in coke oven workers. Methods: 437 coke oven workers and 163 work-ers in water treatment department were recruited in this study. Flow cytometry was used to detect the cell cycle of lymphocyte. For the measurement of urinary metabolites, urine samples were treated with β-glucuronidase and analyzed using HPLC with a fluorescence detector. Results: The concentrations of urinary 2-naphthol, 2-hydroxyfluorene, 9-phenanthrol and 1-hydroxypyrene l in coke oven workers were significantly higher than those in control group (P<0...
November 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28040223/congener-profiles-distribution-sources-and-ecological-risk-of-parent-and-alkyl-pahs-in-surface-sediments-of-southern-yellow-sea-china
#20
Yanxia Lin, Wei Deng, Shengyong Li, Jiafu Li, Guoguang Wang, Dahai Zhang, Xianguo Li
Congener profiles, distribution and sources of parent and alkyl-polycyclic aromatic hydrocarbons (PAHs) in surface sediments of Southern Yellow Sea (SYS), China were investigated. The ecological risk of parent-PAHs to aquatic organisms were evaluated based on sediment quality guidelines (SQGs), risk quotient (RQ), organic carbon (OC)-normalized analysis and mean effects range-median quotient (M-ERM-Q). The concentrations of 33 PAHs were analyzed, including 14 parent PAHs (without naphthalene and acenaphthylene), 16 alkyl-PAHs (7 methylphenanthrenes, 3 methylanthracenes, 3 methylfluoranthenes, and 3 methylpyrenes), dibenzothiophene, retene and perylene...
February 15, 2017: Science of the Total Environment
keyword
keyword
91917
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"