NOHUT SAMANI TARLA ATIĞININ SULU ÇÖZELTİLERDEN METİLEN MAVİSİ GİDERİMİNDE DÜŞÜK MALİYETLİ BİYOSORBENT OLARAK DEĞERLENDİRİLMESİ

Yapılan bu çalışmada tarımsal bir atık olan nohut samanı, sulu çözeltilerden boyar madde gideriminde biyosorbent olarak değerlendirilmiştir. Çözelti pH’ı, biyosorbent miktarı, başlangıç boyar madde derişimi, temas süresi ve çözelti sıcaklığının biyosorpsiyon işlemine olan etkileri incelenmiştir. Ayrıca, metilen mavisi biyosorpsiyonuna ait denge izoterm, termodinamik ve kinetik çalışmalar gerçekleştirilmiştir. Biyosorpsiyon denge verilerinin Freundlich izotermi ile uyumlu olduğu belirlenmiş, biyosorpsiyonu en iyi ifade edebilen kinetik modelin ise sözde(yalancı) ikinci dereceden model olduğu saptanmıştır. Hesaplanan termodinamik parametreler, biyosorpsiyonun 20-50 °C aralığında kendiliğinden gerçekleşen endotermik bir işlem olduğunu göstermiştir. Metilen mavisi biyosorpsiyonu için nohut samanının maksimum tek tabaka biyosorpsiyon kapasitesi 108,7 mg/g olarak belirlenmiştir. Sonuç olarak, nohut samanının sulu çözeltilerden metilen mavisi gideriminde çevreye dost, düşük maliyetli ve etkili bir biyosorbent olarak kullanılabileceği belirlenmiştir.

Anahtar Kelimeler:

Biyosorpsiyon, boyar madde, nohut samanı, izoterm, kinetik, termodinamik

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