Abstract:
:This article describes the use of a cationized starch-based material as new ion-exchanger adsorbent for the removal of C.I. Acid Blue 25 (AB 25) from aqueous solutions. Batch adsorption studies concerning the effects of contact time, pH and temperature are presented and discussed. Adsorption experimental data showed that: (i) the process was uniform and rapid: adsorption of dye reached equilibrium in 50 min in the wide pH range of dye solutions; (ii) adsorption kinetics followed the pseudo-second order model; (iii) the Langmuir model yielded a much better fit than the Freundlich model for the dye concentration range under study; (iv) this adsorbent exhibited interesting adsorption capacities: on the basis of the Langmuir analysis, the maximum adsorption capacity was determined to be 322 mg of dye per gram of material at 25 degrees C; (v) the adsorption capacity decreased with increasing temperature; and (vi) the negative value of free energy change indicated the spontaneous nature of adsorption.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Renault F,Morin-Crini N,Gimbert F,Badot PM,Crini Gdoi
10.1016/j.biortech.2008.02.011subject
Has Abstractpub_date
2008-11-01 00:00:00pages
7573-86issue
16eissn
0960-8524issn
1873-2976pii
S0960-8524(08)00127-2journal_volume
99pub_type
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journal_title:Bioresource technology
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