TY - JOUR
T1 - Adsorption of chromium (VI) by strong alkaline anion exchange fiber in a fixed-bed column
T2 - Experiments and models fitting and evaluating
AU - Wang, Wenqing
AU - Li, Mingyu
AU - Zeng, Qingxuan
N1 - Publisher Copyright:
© 2015 Published by Elsevier B.V.
PY - 2015/5/28
Y1 - 2015/5/28
N2 - Continuous fixed-bed column studies for Cr (VI) removal from aqueous solutions were carried out by using Strong Alkaline Anion Exchange Fiber (SAAEF) as an absorbent. The effects of initial concentration, pH value, bed depth, temperature and flow rate were examined. The results showed a forward breakthrough point and decreasing exhaustion time with initial concentration, pH value and flow rate increasing. The optimum bed depth could be calculated when the loading density is about 0.20 g cm-3. The Thomas, Adams-Bohart, Yoon-Nelson and Clark models were applied to predict the adsorption under varying experimental conditions. The Thomas model was in good agreement with the experimental data in representing the whole breakthrough curve while the Adams-Bohart model was valid when ct/c0 < 0.5 and the Yoon-Nelson and Clark models were less satisfactory.
AB - Continuous fixed-bed column studies for Cr (VI) removal from aqueous solutions were carried out by using Strong Alkaline Anion Exchange Fiber (SAAEF) as an absorbent. The effects of initial concentration, pH value, bed depth, temperature and flow rate were examined. The results showed a forward breakthrough point and decreasing exhaustion time with initial concentration, pH value and flow rate increasing. The optimum bed depth could be calculated when the loading density is about 0.20 g cm-3. The Thomas, Adams-Bohart, Yoon-Nelson and Clark models were applied to predict the adsorption under varying experimental conditions. The Thomas model was in good agreement with the experimental data in representing the whole breakthrough curve while the Adams-Bohart model was valid when ct/c0 < 0.5 and the Yoon-Nelson and Clark models were less satisfactory.
KW - Adsorption
KW - Fixed-bed column
KW - Hexavalent chromium
KW - Strong alkaline anion exchange fiber
UR - http://www.scopus.com/inward/record.url?scp=84930201641&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2015.05.022
DO - 10.1016/j.seppur.2015.05.022
M3 - Article
AN - SCOPUS:84930201641
SN - 1383-5866
VL - 149
SP - 16
EP - 23
JO - Separation and Purification Technology
JF - Separation and Purification Technology
ER -