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SULU ÇÖZELTİLERDEN ADSORPSİYON İLE Cr (III) UZAKLAŞTIRILMASI

Cr(III) REMOVAL FROM AQUEOUS SOLUTIONS BY ADSORPTION

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Abstract (2. Language): 
The adsorption of Cr (III) on the adsorbent produced from lignite coal was studied as a function of time, amount of adsorbent, pH and temperature. Cr (III) adsorption data obeyed Freundlich, Langmuir and Lagergren equations. The values of AH0, AS0 and AG0 were calculated. The results showed that adsorption is endothermic. The negative free energy values indicate that the process of Cr (III) adsorption is spontaneous and favoured at high temperatures. The adsorption of Cr (III) in the presence of different cations was also studied at 200 C. The results were correlated with the ionic potential of cations.
Abstract (Original Language): 
Linyit kömüründen elde edilen adsorbent üzerine Cr (III) adsorpsiyonu zamanın, adsorbent miktarının, pH'nın ve sıcaklığın fonksiyonu olarak çalışıldı. Cr (III) adsorpsiyon verileri Freundlich, Langmuir ve Lagergren eşitliklerine uydu. AH0, AS0 ve AG0 değerleri hesaplandı. Sonuçlar adsorpsiyonun endotermik olduğunu gösterdi. Negatif serbest enerji değerleri Cr (III) adsorpsiyonunun kendiliğinden olduğunu ve yüksek sıcaklıklarda daha uygun olduğunu gösterdi. Cr (III) adsorpsiyonu, çeşitli katyonların varlığında 20 °C'de çalışıldı. Sonuçlar katyonların ionik potensiyelleri ilişkilendirildi.
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