Yazar "Aydin, Senar" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • Küçük Resim Yok
    Öğe
    Application of simple and low-cost toxicity tests for ecotoxicological assessment of industrial wastewaters
    (TAYLOR & FRANCIS LTD, 2015) Aydin, Mehmet Emin; Aydin, Senar; Tongur, Sueheyla; Kara, Gulnihal; Kolb, Marit; Bahadir, Muefit
    The objective of this study was to identify and to apply appropriate biotests having the advantages of being highly sensitive, easy to run, relatively inexpensive and able to substitute fish toxicity tests due to ethical reasons of animal welfare. To perform an ecotoxicological assessment of industrial wastewaters, different microbiotests were conducted to substitute the fish toxicity test with Lebistes reticulatus through Vibrio fischeri, Thamnocephalus platyurus, Daphnia magna, Lemna minor and Lepidium sativum representing different trophic levels in the aquatic and terrestrial ecosystems. Also, Algaltox F-TM with Pseudokirchneriella subcapitata and Protox F-TM with Tetrahymena thermophila tests were carried out. However, they could not be applied successfully for the wastewater samples. Wastewater samples from seven different industrial zones comprising different industries were subjected to characterization through measuring their physical-chemical parameters and their toxicity versus the above-mentioned organisms. T. platyurus, D. magna and L. reticulatus were the most sensitive test organisms investigated for the wastewaters. Considering toxic unit values, generally wastewater samples were toxic according to Thamnotox F-TM, Daphtox F-TM and fish toxicity tests. As an important outcome, it was concluded that Daphtox F-TM and Thamnotox F-TM could be a good alternative for the fish toxicity test, which is so far the sole toxicity test accepted by the Turkish Water Pollution Control Regulation.
  • Küçük Resim Yok
    Öğe
    The physical and physicochemical properties of some Turkish thermal muds and pure clay minerals and their uses in therapy
    (SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, 2017) Celik Karakaya, Muazzez; Karakaya, Necati; Aydin, Senar
    The physical and physicochemical properties of thermal muds (peloids) from 20 spas in Turkey were defined and compared with those of naturally pure clay minerals, smectite, illite, sepiolite, and kaolinite, to define the suitability of their use in pastes, masks, creams, and/or mud baths. The liquid and plastic limit values of the peloids show medium to high plasticity. The values of the pure clay minerals vary from 110 to 369 and 60 to 130, respectively, being higher than those of the peloid samples except for illite and kaolinite. The peloid samples show very soft, soft, semihard, hard, and fluid properties according to the consistency index. The CEC values of the peloids vary from 10.11 to 36.01 meq/100 g. The abrasivity of the peloids and clay minerals ranges from 0.58 to 3.12 mg/m(2) and 0.05 to 0.37 mg/m(2), respectively. The viscosity values of the peloid samples are variable and the thixotropic values are considerably higher in some peloid samples. In the pure clay minerals, sepiolite shows high values. The oil absorption capacity of sepiolite is higher than that of the other clay minerals. The peloids with high CEC, swelling, and absorption capacity may be suitable for the removal of oils, toxins, and contaminants from the skin.
  • Küçük Resim Yok
    Öğe
    Removal of lindane from an aqueous solution by using aminopropyl silica gel-immobilized calix[6]arene
    (ELSEVIER SCIENCE BV, 2013) Tor, Ali; Aydin, Mehmet Emin; Aydin, Senar; Tabakci, Mustafa; Beduk, Fatma
    An aminopropyl silica gel-immobilized calix[6]arene (C[6]APS) has been used for the removal of lindane from an aqueous solution in batch sorption technique. The C[6]APS was synthesized with p-tert-butylcalix[6]arene hexacarboxylate derivative and aminopropyl silica gel in the presence of N,N'-diisopropyl carbodiimide coupling reagent. The sorption study was carried out as functions of solution pH, contact time, initial lindane concentration, C[6]APS dosage and ionic strength of solution. The matrix effect of natural water samples on the sorption efficiency of C[6]APS was also investigated. Maximum lindane removal was obtained at a wide pH range of 2-8 and sorption equilibrium was achieved in 2 h. The isotherm analysis indicated that the sorption data can be represented by both Langmuir and Freundlich isotherm models. Increasing ionic strength of the solutions increased the sorption efficiency and matrix of natural water samples had no effect on the sorption of lindane. By using multilinear regression model, regression equation was also developed to explain the effects of the experimental variables. (C) 2013 Elsevier B.V. All rights reserved.
  • Küçük Resim Yok
    Öğe
    TOXICITY ASSESSMENT OF LANDFILL LEACHATES WITH A BATTERY OF BIOASSAYS
    (PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2015) Aydin, Mehmet Emin; Aydin, Senar; Bahadir, Muefit; Kolb, Marit; Tongur, Suheyla; Kara, Gulnihal
    In this study, the toxicity of the leachate from the municipal landfill was evaluated and assigned to its chemical composition. Leachate samples were collected considering different seasons and assessed for their toxicity by using Thamnotox with Thamnocephalus platyurus, Daphtox with Daphnia magna, Vibrio fischeri, Lemna minor, and Lepidium sativum. Leachate samples were also characterized measuring their physical and chemical parameters. Relationships between the chemical composition and the toxicity of leachate samples were established. EC50, values for Thamnotox, Lemna minor, and Lepidium sativum were negatively correlated with the COD content. There were significant correlations between the TOC with EC50 values of Vibrio fischeri and Lemna minor tests. Vibrio fischeri wasthe most sensitive test organism investigated for the landfill leachate. Considering toxic unit values, leachate samples were highly to very highly acute toxic, according to all the tests carried out.