Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Erciyes Üniversitesi, Fen Bilimleri Enstitüsü, Türkiye
Tezin Onay Tarihi: 2023
Tezin Dili: Türkçe
Öğrenci: FATMA NUR KILIÇ
Danışman: Osman Sönmez
Özet:
Various factors, such as industrial activities, mining, and intensive agricultural practices, have increased heavy metal (HM) accumulation in the soil. Conventional chemical and physical techniques commonly used for HM removal often entail high costs and exhibit limited efficiency in pollutant remediation, especially in the post-treatment phase. Consequently, more environmentally friendly and practical approaches have gained attention. This study evaluates the bioremediation potential of the microalga Haematococcus pluvialis (H. pluvialis) and three different cultivars of Festuca arundinacea (F. arundinacea) (Nilüfer, Grande II, Jaguar 4G) in reducing soil concentrations of Cd, Pb, and Zn. The findings indicate that different doses of microalgal treatments generally enhanced the accumulation of Cd, Pb, and Zn in both shoots and roots of the tall fescue cultivars. Increased microalgal dosages were observed to lead to higher bioaccumulation factors for Cd and Zn, while that of Pb decreased. Moreover, for all three metals, increased microalgal doses elevated the translocation factor and the percentage of bioremediation. The efficiency of remediation varies depending on the tall fescue cultivars and the application doses, with Grande II showing the highest RE when combined with microalgal treatments. Additionally, post-harvest soil analysis revealed a reduction in available Cd, Pb, and Zn concentrations by approximately 57.14%, 20.31%, and 25.46%, respectively, compared to pre-harvest levels. There was also a decrease of roughly 2.69% in soil pH, alongside an increase of 5.34% in OM content. These results highlight the necessity of optimizing microalgal doses and demonstrate that the combination of 1.5 g kg⁻¹ H. pluvialis with the Grande II cultivar represents the most effective strategy for HM removal. While studies in the literature indicate the effectiveness of microalgae in removing HMs from wastewater, research on their application in soil remediation is limited, and no prior information exists regarding the use of H. pluvialis for soil-based HM removal. This study is expected to contribute to the literature on using H. pluvialis in soil remediation and serve as a foundation for future research in this area.