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1.
Mehmet Akgül Nadir Ayrilmis Osman Çamlıbel Süleyman Korkut 《Journal of Material Cycles and Waste Management》2013,15(2):195-201
The potential utilization of burned wood in the manufacture of medium density fiberboard (MDF) was investigated. For this aim, the MDF panels were made of various mixtures of burned pine wood (Pinus sylvestris L.), unburned beech (Fagus orientalis L.) and oak (Ouercus robur L.) woods under commercial conditions in an MDF company. The mixture ratio of the unburned beech and oak woods to the burned pine wood were 50/50 wt%. The mixing ratios of burned wood chips with unburned wood chips were 0:100, 25:75, 50:50, 75:25 and 100:0, %, respectively. A commercial urea–formaldehyde resin was used as a binder. The physical properties measured in the investigation included density and thickness swelling, while the mechanical properties examined were bending strength, modulus elasticity, internal bond, screw holding ability perpendicular to the plane of panel, and janka hardness perpendicular to the plane of the panel. Surface roughness and color of the panels were also measured. The results indicated that all the panels met the mechanical properties of general-purpose MDF requirements of EN 622-5. The surface roughness of the MDF panels containing burned wood decreased with increasing burned wood content but remained higher than the control panels. The dimensional stability of the MDF panels decreased with the incorporation of burned wood fibers as compared with the control MDF panels. 相似文献
2.
Nebile Daglioglu Ramazan Akcan Pinar Efeoglu Nihal Inandiklioglu Mete Korkut Gulmen Osman Demirhan 《毒物与环境化学》2013,95(6):954-961
The concentrations of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were determined in amniotic fluid of 200 pregnant women from the Cukurova region of Turkey. The concentrations of OCPs [hexachlorocyclohexane (HCH), hexachlorobenzene (HCB), dichlorodiphenyl trichloroethane (p,p′-DDT), and various metabolites], and different PCB congeners (28, 52, 101, 118, 138, 153, 180) were determined by gas chromatography with electron capture detection as follows: HCB 6.6 ± 4.7, ΣHCH 21.6 ± 14.2, ΣDDT 12.5 ± 7.5, and ΣPCBs 74.0 ± 54 ng mL?1. Correlations of maternal or gestational age and levels of OCPs and PCBs were not significant. The levels of these organochlorine compounds (OCs) were below detection limit for 5% of the samples, 80% contained more than one OC. This study illustrates that prenatal exposure of a fetus to OCs is prevalent in the Cukurova region. 相似文献
3.
Pata Ugur Korkut 《Environmental science and pollution research international》2019,26(20):20264-20276
Environmental Science and Pollution Research - In this study, the validity of the environmental Kuznets curve (EKC) hypothesis is examined with the newly developed bootstrap autoregressive... 相似文献
4.
Nazlıcan Ersin Arıca Enes Gören İsmail Ethem Kılınçlı Betül Mete Burak Daglioglu Nebile 《Environmental science and pollution research international》2022,29(10):13963-13970
Environmental Science and Pollution Research - Toxic heavy metals released into the environment through various industrial processes have potential adverse effects on the environment and human... 相似文献
5.
Composition of wet deposition in Kaynarca,Turkey 总被引:9,自引:0,他引:9
In this work, composition of wet deposition in Kaynarca, Turkey is studied by collecting precipitation samples during more than a 2-year period. August 1993-November 1995. Concentrations of the main cations Na+, Mg2+, Ca2+, K+, NH4+ and the main anions Cl-, NO3- and SO4(2-) together with pH were studied. The average pH value at Kaynarca was near neutral, 5.59. Results indicated that SO4(2-) concentration in precipitation was very high, as was Ca2+, neutralizing the acidity. Acidic wet deposition samples were generally obtained in winter. Enrichment factors for sea and soil indicate the strong effects of sea and soil, specifically limestone on the composition of precipitation. Non-sea salt fractions of SO4(2-) were found to range from 0.955 to 0.980, showing the effect of non-sea sources, especially emissions from fossil-fuel combustion, on the pH of samples. Trajectory analysis showed that cyclones originating from northwestern, central and eastern parts of Europe have generally high sulfate and nitrate concentrations and low pH. 相似文献
6.
In this study, SO2 dispersion over İzmit Gulf is simulated by California Puff (CALPUFF) model for three air pollution cases, which occurred
on January 28, February 12, and February 26, 1997. These days are generally characterized by dominant high-pressure systems
– pressure values reaching 1032 mb, low wind speeds and sometimes calm conditions, and low temperatures with a minimum of
0°C. Hourly simulations during those critical cases were carried out and results revealed very high concentrations of SO2 transported to the downwind regions of Tüpraş and Gebze, and values sometimes exceeded 1,000 μg/m3. Nighttime and morning simulations associated with inversion produced considerably higher values of SO2 than the afternoon simulations associated with breeze. Model verification was conducted by comparing the measured daily average
values of eight stations with the model predicted values at the same receptor points. Results showed that the model well predicted
the values at station Gebze in all three cases. The model sometimes underestimated and sometimes overestimated the concentrations
at other receptor stations. 相似文献
7.
8.
The present article uses the Autoregressive Distributed Lag (ARDL) bounds testing procedure to identify the impact of immigration and economic growth on electricity consumption in the case of North Cyprus using annual data from 1977 to 2007. The results suggest that both economic growth and immigration are in a long-run equilibrium relationship with electricity consumption. 相似文献
9.
Akkoyunlu Bülent O. Tayanç Mete Karaca Mehmet 《Water, Air, & Soil Pollution: Focus》2003,3(5-6):141-155
This study presents the chemical composition of bulk deposition during the period of February 1996–May 1997 and the chemical composition of sub-event wet deposition on 13 August 1997 in Gebze. Samples were analyzed for SO4
2-, NO3
-, Cl-,Ca2+, Mg2+, K+, Na+, and NH4
+ in addition to pH. The source of some ionic components in the bulk deposition such as K+ and Ca2+ were found to be the terrestrial regions, as expected. The (non-sea Cl-)/Cl- ratio of 0.05 suggests that the very large portion of Cl- in the bulkdeposition was of marine origin. The ratio of (non-sea SO4
2-)/SO4
2- varied between 0.86 and 0.99,indicating that the main source of sulfate was not the sea. It is found that the sulfate and calcium concentrations were highest in summer and lowest in fall. The analysis of bulk deposition also indicated that nearly 24% of the events were acidic (pH < 5.6). During sub-event wet deposition collectedon the same site pH decreased continually, and during the passageof cold front concentrations of Cl-, SO4
2- and NO3
- increased. 相似文献
10.
Environmental and Ecological Statistics - This paper empirically explores the dynamic relationships between financial development, globalization, energy consumption, economic growth, and ecological... 相似文献