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Pata Ugur Korkut,Kartal Mustafa Tevfik 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.2
This study investigates the impacts of nuclear energy consumption on environmental quality from a different perspective by focusing on carbon dioxide (CO2) emissions, ecological footprint, and load capacity factor. In this context, the South Korea case, which is a leading country producing and consuming nuclear energy, is investigated by considering also economic growth, and the 1997 Asian crisis from 1977 to 2018. To this end, the study employs the autoregressive distributed lag (ARDL) approach. Different from previous literature, this study proposes a load capacity curve (LCC) and tests the LCC and environmental Kuznets curve (EKC) hypotheses simultaneously. The analysis results reveal that (i) the LCC and EKC hypotheses are valid in South Korea; (ii) nuclear energy has an improving effect on the environmental quality; (iii) renewable energy does not have a significant long-term impact on the environment; (iv) the 1997 Asian crisis had an increasing effect on the load capacity factor; (v) South Korea has not yet reached the turning point, identified as $55,411, where per capita income improves environmental quality. Overall, the results show the validity of the LCC and EKC hypotheses and prove the positive contribution of nuclear energy to South Korea's green development strategies.
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Oksuz Ahmet Emrecan,Yurddaskal Metin,Kartal Ugur,Dikici Tuncay,Erol Mustafa 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.6
In this paper, the photocatalytic activity of ZnO nanostructures formed by anodization method with diff erent parameters was investigated. The synthesis of ZnO nanostructures with diff erent morphology by varying anodic oxidation parameters containing electrolytes, molarity, voltage, and duration was analyzed. ZnO nanostructures were prepared through diff erent parameters consisting of six samples. The produced ZnO nanostructures were investigated by using X-ray diff raction, scan- ning electron microscopy, diff use refl ectance spectroscopy, and UV–Vis spectrophotometer. It was found that the morphology of ZnO structures was formed as nanorods, needle-like, fl ower-like, heterogeneous, and homogeneous of mixed structures. ZnO nanostructures were identified by matching X-Ray diffraction peaks due to the international center for diffraction data database. Experiments on photocatalytic degradation of methylene blue demonstrated that the photocatalytic activity of ZnO samples. The best photocatalytic performance was observed by the sample anodized for an hour in 0.05 M of KHCO 3 electrolytes with 40 V electrical potential. It was observed that the removal of methylene blue increased 3 times (photocatalytic degradation efficiency ~ 31% for methylene blue vs ~ 90% by the best sample) thanks to the obtained ZnO nanostructured photocatalysts. The results showed that an increment of the voltage has a significant effect on the photocatalytic activity of ZnO while keeping other parameters including molarity, time, and electrolyte type constant.
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