Removal of metal ions from aqueous solutions by sorption onto rice bran

A new sorbent (raw rice bran) was investigated for heavy metal ions removal from aqueous solutions. Rice bran characterisation was carried out in order to identify the functional groups possibly involved in the metal binding. The binding process was studied in terms of binding capacity and metal aff...

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Veröffentlicht in:	Journal of hazardous materials 2005-01, Vol.117 (2), p.207-211
Hauptverfasser:	Montanher, S.F., Oliveira, E.A., Rollemberg, M.C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Biosorption Chemistry Exact sciences and technology Freundlich isotherm General and physical chemistry General purification processes Heavy metal ions Ions Metals, Heavy - isolation & purification Oryza - chemistry Pollution Rice bran Solid-liquid interface Solutions Sorption Detoxification - instrumentation Sorption Detoxification - methods Surface physical chemistry Wastewaters Water - chemistry Water Pollutants, Chemical - isolation & purification Water Pollution, Chemical - prevention & control Water treatment and pollution
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Beschreibung
Zusammenfassung:	A new sorbent (raw rice bran) was investigated for heavy metal ions removal from aqueous solutions. Rice bran characterisation was carried out in order to identify the functional groups possibly involved in the metal binding. The binding process was studied in terms of binding capacity and metal affinity. The adsorption equilibrium was well described by the Freundlich isotherm model. The negative Gibbs free energy values obtained in this study with rice bran confirm the feasibility of the process and the spontaneous nature of sorption.
ISSN:	0304-3894 1873-3336
DOI:	10.1016/j.jhazmat.2004.09.015