TY - JOUR
T1 - Enhancing the adsorption capacities of acid dyes by chitosan nano particles
AU - Cheung, W. H.
AU - Szeto, Y. S.
AU - McKay, G.
PY - 2009/2
Y1 - 2009/2
N2 - In the present study, nanochitosan emulsion has been produced in a suspension form by adding tripolyphosphate solution into a chitosan solution drop-wise. The adsorption capacities of four acid dyes, namely, Acid Orange 10 (AO10), Acid Orange 12 (AO12), Acid Red 18 (AR18) and Acid Red 73 (AR73) on nanochitosan, have been determined to be 1.77, 4.33, 1.37 and 2.13 mmol l-1, respectively. The nanochitosan dye capacities were compared with normal chitosan capacities which were 1.54, 2.66, 1.11 and 1.25 mmol l-1 for AO10, AO12, AR18 and AR73, respectively. In all cases, the nanochitosan has a higher capacity. The mechanism of acid dye adsorption and the effect of pH are also discussed.
AB - In the present study, nanochitosan emulsion has been produced in a suspension form by adding tripolyphosphate solution into a chitosan solution drop-wise. The adsorption capacities of four acid dyes, namely, Acid Orange 10 (AO10), Acid Orange 12 (AO12), Acid Red 18 (AR18) and Acid Red 73 (AR73) on nanochitosan, have been determined to be 1.77, 4.33, 1.37 and 2.13 mmol l-1, respectively. The nanochitosan dye capacities were compared with normal chitosan capacities which were 1.54, 2.66, 1.11 and 1.25 mmol l-1 for AO10, AO12, AR18 and AR73, respectively. In all cases, the nanochitosan has a higher capacity. The mechanism of acid dye adsorption and the effect of pH are also discussed.
KW - Acid dyes
KW - Adsorption
KW - Chitosan
KW - Nanochitosan
UR - http://www.scopus.com/inward/record.url?scp=55549120511&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2008.07.071
DO - 10.1016/j.biortech.2008.07.071
M3 - Article
C2 - 18829305
AN - SCOPUS:55549120511
SN - 0960-8524
VL - 100
SP - 1143
EP - 1148
JO - Bioresource Technology
JF - Bioresource Technology
IS - 3
ER -