Cr(In) Removal From Aqueous Solutions By Adsorption

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 ads...

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Veröffentlicht in:	Mühendislik bilimleri dergisi 2002, Vol.8 (3), p.387-393
1. Verfasser:	Mahramanlıoğlu,Mehmet
Format:	Artikel
Sprache:	eng
Schlagworte:	activated carbon activation adsorbent Adsorplayıcı madde Adsorpsiyon Adsorpsiyon, Cr (VI), Cr(III), Termodinamik parametreler, Adsorpsiyon izotermi adsorption Aktif karbon Aktivasyon carbonization[chemical reaction] chromium coal Eğitim Bilimleri Fizikokimya Inorganic Chemical Industry İnorganik Kimya Sanayii Karbonlama Kinetics Kinetik Krom Kömür Mühendislik pH effect pH etkisi Physical Chemistry Sıcaklık etkisi Temperature effect Termodinamik parametreler Thermodynamic parameters time dependence Zamana bağlılık
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Zusammenfassung:	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.
ISSN:	1300-7009 2147-5881