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11.
Sema Karanl?k Necat A?ca Mehmet Yal??n 《Environmental monitoring and assessment》2011,173(1-4):181-191
The purpose of the study was to investigate the total and bio-available contents of heavy metals (Cd, Co, Ni, and Pb) and to determine their spatial variability in the Amik Plain, Turkey. Samples of surface and subsurface soil were collected at 132 sites in the research area. All of the total metal concentrations except Ni were considerably lower than their maximum allowable concentrations. Mean available Pb concentrations at both depths were above the permissible limits, while the other metal concentrations were within the proposed limits. Semivariograms of all the total metal contents, pH, and available Ni and Pb content were best fitted to spherical models, while available Cd and Co contents were best fitted to exponential models. Block kriging was used to interpolate values at unmeasured locations, generating maps of spatial variation for each heavy metal and pH. 相似文献
12.
Distribution and bioaccumulation of organochlorine pesticides along the Black Sea coast 总被引:1,自引:0,他引:1
Sediment, mussel, and seawater samples were collected three times during 2001–2003 at nine sampling stations along the mid-Black
Sea coast of Turkey. The samples were analyzed with GC-ECD for contents of various organochlorine pesticides (OCPs) in the
environment. DDT and its metabolites were detected at concentrations significantly above the detection limits. The highest
concentrations of DDT metabolites measured in the sediment and mussel samples were 35.9 and 14.0 ng/g wet weight respectively.
Considerable levels of aldrin, dieldrin, endrin, heptachlor epoxide, lindane, endosulfan sulphate, and HCB were also detected
in the sediment, mussel, or seawater samples. Although these persistent toxic compounds have been banned for some years in
Turkey, they may still be used illegally in some regions, contributing to their significant levels in the environment. The
biota–sediment accumulation factor (BSAF) estimated for DDT and its metabolites in mussels was 2.9, which is nearly two times
higher than the benchmark of 1.7. In spite of such high BSAF values observed for these toxic compounds, their levels in mussels
were significantly below the international legal limits recommended by the Food and Agriculture Organization of the United
Nations. Edible biota from the waterbodies examined may thus still be considered safe for human consumption at this time.
However, as pollutants can biomagnify through the food chain over time, further routine sampling and analysis of biota along
the Black Sea coast are warranted in order to better assess the threat of OCPs to public health in the region. 相似文献
13.
Azra Bozcaarmutlu Sema Turna Canan Sapmaz Serpil Yenisoy-Karakaş 《Environmental monitoring and assessment》2014,186(12):8151-8160
The objective of this study was to determine the levels of 14 organochlorine pesticides (OCPs) in flathead mullet (Mugil cephalus) caught from the western Black Sea coast of Turkey. The fish samples were caught from five different locations of the western Black Sea coast of Turkey in August 2009. Organochlorine pesticides were extracted from the liver tissues, and then the levels of OCPs were measured using gas chromatography with an electron capture detector. Organochlorine pesticides were detected in all locations. The levels of total OCPs in fish samples ranged between 0.224 and 1.103 μg g?1 dry weight in the western Black Sea coast of Turkey. DDT, beta-HCH, and endosulfan I were the dominant OCPs in the fish samples. The levels of DDT in fish samples ranged between 0.081 and 0.186 μg g?1 dry weight. The levels of total HCH in fish samples ranged between 0.007 and 0.376 μg g?1 dry weight in the western Black Sea coast of Turkey. Although the usage of OCPs was banned in Turkey, the results of this study clearly indicated the presence of OCPs in the western Black Sea coast of Turkey and exposure of living organisms to these chemicals. 相似文献
14.
Madhavi Rajak Khageshwar Singh Patel Nitin Kumar Jaiswal Raj Kishore Patel Elza Bontempi Eduardo Yubero Laurent Matini Sema Yurdakul Pablo Martín-Ramos 《环境质量管理》2023,32(3):287-299
Soil quality in urban areas in India is degraded due to multiple anthropogenic activities. The objectives of this work are to determine the concentration variations, toxicity, and sources of carbons, metals, and ions in the surface soil of Raipur, the industrialized capital city of Chhattisgarh state, India. High concentrations of Al, K, Ca, Ti, Fe, and elemental carbon (EC) were registered. Relatively lower concentrations of V, Cr, Mn, Ni, Cu, Zn, Sr, Ba, Pb, organic carbon (OC), and carbonate carbon (CC), as well as ions (viz. F–, Cl–, NO3–, SO42–, Na+, K+, Mg2+, and Ca2+), were also recorded. EC was found to be one of the major pollutants, although enrichment factors pointed to high contamination with SO42–, K+, Mg2+, Cr, Mn, and Pb; and extreme contamination with NO3– and Ca2+. The spatial and temporal variations, enrichment factors, toxicity, and sources of the chemical species detected in the soil are discussed. 相似文献
15.
Topcu Sema Anteplioglu Umit Incecik Selahattin 《Water, Air, & Soil Pollution: Focus》2003,3(5-6):55-66
In this study, an assessment has been made on the wind speed; temperature and atmospheric pressure were analyzed by considering meteorological variables for selected high ozone cases. The Systems Applications International Meso-scale Model (SAIMM), a prognostic meteorological model was used to develop the 3-dimensional meteorological inputs to a chemical model. Meteorological conditions favorable for high ozone concentrations appear when Istanbul and the surrounding region is dominated by an anticyclonic pressure system. During the ozone favorabledays, south and southwesterly winds with low wind speed influence Istanbul. We presented wind field simulations for a case study in explaining the ozone formation mechanism over Istanbul. 相似文献
16.
In this study, high capacity Chestnut shell, a waste product from the chestnut sugar production industry, was successfully applied to remove Pb (II) and Cd (II) ions from aqueous solutions. Maximum adsorption capacities were found as 541.25?mg/g and 75.86?mg/g for Pb(II), and Cd(II) respectively. Several important parameters influencing the adsorption of Pb(II) and Cd(II) ions such as contact time, pH, temperature and effect of metal concentration were investigated systematically by batch experiments. Langmuir and Freundlich adsorption models were used to describe adsorption isotherms and constants. The thermodynamic parameters, such as standard free energy (ΔG°), standard enthalpy (ΔH°), and standard entropy (ΔS°), of the adsorption process were calculated. The adsorbents were characterised by scanning electron microscopy. It has been observed from the experimental results that in case of both Cd (II) and Pb (II), pseudo 2nd order kinetic model. From the results, Chestnut Shell are considered as an effective, low cost and environmental friendly adsorbent for the removal of Pb (II) and Cd (II) from wastewater. 相似文献
17.
Li Tianci Yang Congning Tantikhajorngosol Puttipong Sema Teerawat Shi Huancong Tontiwachwuthikul Paitoon 《Environmental science and pollution research international》2022,29(46):69402-69423
Environmental Science and Pollution Research - In this work, new CO2 solubility data on three types of aqueous amine blends were reported to complement existing databases. The experiments were... 相似文献