Author/Authors :
Gong، R نويسنده College of Life Science, Anhui Normal University, Wuhu, 241000, P. R. China , , Li، N نويسنده College of Life Science, Anhui Normal University, Wuhu, 241000, P. R. China , , Cai، W نويسنده College of Life Science, Anhui Normal University, Wuhu, 241000, P. R. China , , Liu، Y نويسنده College of Life Science, Anhui Normal University, Wuhu, 241000, P. R. China , , Jiang، J نويسنده The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, Xuzhou Normal University, Xuzhou, 221116, P. R. China ,
Abstract :
In this study, cross linked chitosan resin (CCR) was prepared by cross linking chitosan
with glutaraldehyde, and then ?-ketoglutaric acid-modified chitosan resin (KCR) was obtained by
modifying CCR with ?-ketoglutaric acid. The sorption behavior of methylene blue (MB) on KCR and
CCR from aqueous solution was investigated. The effect of various experimental parameters (e.g.
initial pH, sorbent dose, dye concentration, contact time, and temperature) was examined. The
maximal MB sorption ratio on KCR and CCR was respectively reached beyond pH 8 and at pH 8. The
MB removal ratio on KCR and CCR increased with increasing sorbent dose but decreased with
increasing dye concentration. The isothermal data of MB sorbed on KCR and CCR followed the
Langmuir model. The MB sorption process could be described by the pseudo-second-order kinetic
model. The thermodynamic study indicated that the MB sorption process was spontaneous and
exothermic.
