Mikroalgler Kullanılarak Sığır Gübresinden Çinko (Zn) Giderimi

Öz

Sığır gübresi toprağı zenginleştirmek için yaygın olarak organik gübre olarak kullanılmaktadır; ancak içerdiği ağır metaller nedeniyle toprakta ağır metal birikimine yol açabilmekte ve çevresel problemlere neden olabilmektedir. Bu çalışma, sığır gübresinden çinko (Zn) giderimini mikroalgler ile araştırmış ve sıcaklık, pH, mikroalg konsantrasyonu ve temas süresine göre farklı koşullar altında giderim verimliliğini incelemiştir. Sonuçlar, sıcaklık arttıkça Zn giderim verimliliğinin azaldığını, buna karşın pH, mikroalg konsantrasyonu ve temas süresinin artmasının giderim verimliliğini artırdığını göstermiştir. pH 6.5, 0.5 g/L mikroalg konsantrasyonu, 28 °C sıcaklık ve 120 dakika temas süresi koşullarında %83 Zn giderimi elde edilmiştir. Çalışmada Zn giderimi, 27 örneklemeye dayalı Box–Behnken tasarımı ile Yanıt Yüzey Metodolojisi kullanılarak optimize edilmiştir. Deneysel değerler ile kuadratik model tarafından tahmin edilen değerler arasında anlamlı bir korelasyon gözlenmiştir (P < 0.05). Optimum koşullar (pH 6.8, 1.0 g/L, 28 °C, 120 dakika) %92’ye yakın giderim verimliliği sağlamıştır. Bu çalışma, mikroalglerin sığır gübresinden Zn giderimi için önemli bir potansiyele sahip olduğunu göstermiştir ve sığır gübresinden Zn gideriminde mikroalglerin uygulanmasına yönelik ileri araştırmalar için bir referans olarak hizmet etmesi beklenmektedir.

Anahtar Kelimeler

• Ağır Metaller
• Biyoremediasyon
• Çinko Giderimi
• Mikroalgler
• Sığır Gübresi

Destekleyen Kurum

Hacettepe Üniversitesi

Etik Beyan

Bu makalenin yayımlanmasıyla ilgili herhangi bir etik sorun bulunmamaktadır.

Teşekkür

Bu araştırma, Hacettepe Üniversitesi Çevre Mühendisliği Bölümü tarafından kendi kaynaklarıyla finanse edilmiştir. Çalışmada kullanılan sığır gübresini temin eden Dr. Kenan Dalkılıç ve Dr. Elvin Aghayev’e, ayrıca mikroalg kültürünü sağlayan Emine Çağla Tüylüoğlu’na teşekkür ederiz.

Removal of Zinc (Zn) from Cattle Manure by Using Microalgae

Öz

Cattle manure is widely used as an organic fertilizer to enrich soil; however, it can lead to heavy metal accumulation in the soil and cause environmental problems due to the heavy metals it contains. This study investigated the removal of zinc (Zn) from cattle manure by microalgae and examined the efficiency of removal under different contact times according to temperatures, pH and microalgae concentrations. The results revealed that Zn removal efficiency decreased with increasing temperature, while increasing pH, microalgae concentration, and contact time enhanced the process efficiency. The 83% Zn removal was achieved at a pH of 6.5, a microalgae concentration of 0.5 g/L, a temperature of 28 °C, and a contact time of 120 minutes. The study optimized Zn removal using Response Surface Methodology with a Box–Behnken design based on 27 samples. A significant correlation was observed between experimental and quadratic model-predicted values (P <0.05). Optimum conditions (pH 6.8, 1.0 g/L, 28 °C, 120 minutes) achieved ~92% removal efficiency. This study demonstrated that microalgae have significant potential for Zn removal in cattle manure and is anticipated to serve as a reference for further research on the application of microalgae for Zn removal from cattle manure.

Anahtar Kelimeler

• Cattle Manure
• Heavy Metals
• Microalgae
• Remediation
• Zinc Removal

Destekleyen Kurum

Hacettepe University

Etik Beyan

There are no ethical issues with the publication of this article.

Teşekkür

This research has been self-funded by the Department of Environmental Engineering, Hacettepe University. We would like to thank Dr. Kenan Dalkılıç and Dr. Elvin Aghayev for providing the cattle manure, and to Ms. Emine Çağla Tüylüoğlu for supplying the microalgae culture used in this study

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