Phosphate adsorption on chitosan-Fe-III-crosslinking: Batch and column studies

Citation
T. Fagundes et al., Phosphate adsorption on chitosan-Fe-III-crosslinking: Batch and column studies, J LIQ CHR R, 24(8), 2001, pp. 1189-1198
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry & Analysis","Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
ISSN journal
1082-6076 → ACNP
Volume
24
Issue
8
Year of publication
2001
Pages
1189 - 1198
Database
ISI
SICI code
1082-6076(2001)24:8<1189:PAOCBA>2.0.ZU;2-O
Abstract
Eutrophication is the over fertilization of a body of the water by nutrient s resulting in enhanced algae growth, and phosphate is usually identified a s the cause. In this work, the adsorption of phosphate on chitosan-iron(III )-crosslinked (CH-Fe-III-CL) was investigated in an experiment of solid-pha se extraction. The isotherm adsorption, kinetic adsorption, and pH study we re carried out in thermostatically-controlled batches. The dynamic studies were drivers in glass columns. Batch study shows that phosphate adsorption becomes constant after 60 min, 7.0 is optimal pH for phosphate adsorption. Affinity constant and maximum adsorption capacity determined by Langmuir eq uation were 44.4 L min(-1) and 131 mg g(-1). As expected, an increase in th e flowrate reduced the breakthrough volume (180 and 230 mL), exhaustion vol ume (380 and 420 mL), breakthrough sorption capacity (18 and 23 mg g(-1)), and exhaustion sorption capacity (32.4 and 61.4 mg g(-1)) for 2.5 mL min(-1 ) and 1.0 mL min(-1). Such a decrease can be ascribed to a lower residence time.