Cystoseira barbata İle Toryum Biyosorpsiyonu

Yıl 2019, Cilt: 21 Sayı: 62, 461 - 468, 21.05.2019

Yeliz Özüdoğru

https://doi.org/10.21205/deufmd.2019216212

Cited By: 2

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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