Browsing by Publisher "Scibulcom Ltd."

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    Uptake characteristics of Pb(II), Cu(II) and Zn(II) by natural magnetite: Application to river samples
    (Scibulcom Ltd., 2017) Erdem Yayayuruk A.; Yayayuruk O.; Kocak C.C.; Kocak S.
    Natural magnetite was investigated for the removal of Pb(II), Cu(II) and Zn(II) ions from water samples. The optimum experimental conditions including pH, sorbent amount and contact time have been established. Langmuir isotherm model was found to be more suitable to represent the experimental equilibrium than Freundlich isotherm model. The experimental kinetic data were a better fit with pseudo-second order reactions rather than pseudo-first order equation. The sorbent selectively removed Pb(II), Cu(II) and Zn(II) ions in the presence of several competitor ions (≥ 98%). The application of the sorbent for the removal of Pb(II), Cu(II) and Zn(II) ions from ultrapure and river waters gave applicable results (> 90%) with high accuracy and precision. Thus, natural magnetite was found to be useful for the removal of these metal ions and its low toxicity, good biocompatibility, small size and being inexpensive makes it a good promising candidate material for water treatment studies.
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    Construction and architecture students perceptions of renewable energy and determination of awareness level of its usage
    (Scibulcom Ltd., 2018) Mihlayanlar E.; Yuksek I.
    Turkey has enormous solar and wind energy potential, but has not utilised them sufficiently so far. Both reducing the prices of the renewable energy devices to a reasonable level with the help of technological development fulfilled in the renewable energy sector and also provision of government promotion, can help to increase the renewable energy utilisation. However, renewable energy sources can be accepted and used by people only if both everybody knows them and also their utilisation fields and environmental advantages are known very well. In this study, it is aimed to measure students (Architecture Faculty and Technical Education Faculty (TEF)) awareness level for renewable energy. For this, a survey which includes some questions about general information and usage forms of renewable energy in buildings was prepared. Then, results were evaluated by transferring the survey data to Microsoft Excel software. As a result of the study, it is determined that the students studying in the faculty have a certain awareness about renewable energy, and that the architecture students among the faculties seem well aware of transferring the renewable energy technologies to building design and applications than the TEF students. @ 2018 Scibulcom Ltd. All Rights Reserved.
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    Proposed index for drought assessment: Modified reconnaissance drought index (mRDI)
    (Scibulcom Ltd., 2018) Yilmaz B.
    Many drought indices have been developed for drought analysis, one of which is the Reconnaissance Drought Index (RDI) that is widely used all over the world due to its inherent capability of sensitivity and resilience. Since the RDI takes into account both the cumulative precipitation and the potential evapotranspiration that is marked as the main advantage. In this study, a modified version of RDI (mRDI) is proposed to evaluate RDI time series by reliability-resilience-vulnerability-max extent metrics. The use of these performance indices incorporates the frequency, recovery period, probable severity and extremity of droughts. As in many sustainability indexes, the high (low) values of mRDI indicate being in a good (bad) status of the region with respect to drought conditions. The application of mRDI is illustrated for four different provinces of Turkey with different precipitation and temperature regimes. The long-term (between 1970–1971 and 2015–2016 water years) monthly precipitation and mean temperature data were used in the study. The 12 months-RDI time series, which used for calculations of mRDI, were obtained by the use of DrinC software. The study revealed that the mRDI is a valuable index, and it allows evaluating not only the recent conditions, but also the historical droughts in a single metric. It provides additional insights for the studies dealing with socioeconomic droughts, ecologic droughts, moreover, mRDI can be used as an efficient indicator in water resources management and agriculture insurance issues. © 2018, Scibulcom Ltd.. All rights reserved.