Cystoseira barbata İle Toryum Biyosorpsiyonu

Öz

Bu çalışmada, Cystoseira barbata’nın biyosorbent olarak kullanılmasıyla, sulu çözeltide bulunan Th (IV) radyoaktif iyonlarının giderilmesine çalışılmıştır. Kesikli ekstraksiyon yöntemi uygulanmış ve biyosorpsiyona pH, süre ve derişim etkileri incelenmiştir. Tutunma miktarının pH değişiminden pek etkilenmediği belirlenmiştir. Süre denemeleri sonucunda ise,  biyosorpsiyon işleminin ilk 150 dakika içerisinde dengeye ulaştığı görülmüştür.  Derişim denemeleri sonucunda elde edilen verilere, Langmuir ve Freundlich izoterm modelleri uygulanmış, q_m değeri 39,45 mg/g olarak bulunmuştur. Adsorpsiyon denemeleri sonucunda, adsorpsiyonun Freundlich izoterm modeline daha çok uyduğu belirlenmiştir. Yapılan SEM ve FTIR analizleri ile radyoaktif maddenin alg yüzeyinde meydana getirdiği değişiklikler gözlenmiş ve Th (IV) radyoaktif iyonlarının alg yüzeyinde hangi gruplara tutunduğu belirlenmiştir. 

Anahtar Kelimeler

• cystoseira barbata,toryum,biyosorpsiyon

Biosorption of radioactive thorium by Cystoseira barbata

Öz

In this study, it was tried to remove Th (IV) radioactive ions in aqueous solution by using Cystoseira barbata. Batch extraction method was applied and pH, contact time and concentration effects were investigated. It was determined that the amount of removal was not affected by pH change. As a result of time effects, it was observed that the biosorption process reached equilibrium with in the first 150 minutes. Langmuir and Freundlich isotherm models were applied and qm value was found to be 39,45 mg/g. The Freundlich isotherm model showed slightly stronger correlation than Langmuir isotherm. SEM and FTIR analysis were performed to find out the changes on the surface of algae loaded with Th (IV) radioactive ions and the groups Th (IV) attached on algae surface.

Anahtar Kelimeler

• Cystoseira barbata,Th,biosorption

Kaynakça

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