TY - JOUR
T1 - Production and application of a treated bentonite–chitosan composite for the efficient removal of humic acid from aqueous solution
AU - Dehghani, Mohammad Hadi
AU - Zarei, Ahmad
AU - Mesdaghinia, Alireza
AU - Nabizadeh, Ramin
AU - Alimohammadi, Mahmood
AU - Afsharnia, Mojtaba
AU - McKay, Gordon
N1 - Publisher Copyright:
© 2018
PY - 2018/12
Y1 - 2018/12
N2 - Humic acids have a significant undesirable influence on drinking water quality. In this study, we utilized a physically and chemically treated bentonite–chitosan composite (TBCH) for the removal of humic acid from aqueous solutions. Response surface methodology (RSM) using central composite design (CCD) was used to investigate the effects of pH, adsorbent dosage, humic acid concentration and contact time on the adsorption effectiveness of humic acid by TBCH. Isotherms, kinetics and thermodynamics have been also studied. An optimum condition for humic acid uptake was achieved at pH 4, 1.4 g/L adsorbent dosage, 40 mg/L humic acid concentration, and 115 min contact time. This study showed that modified bentonite and chitosan composite (TBCH) was a promising adsorbent for the removal of humic acid from aqueous solutions due to its significant removal efficiency, natural abundance and low cost; it may be an alternative to more costly available materials.
AB - Humic acids have a significant undesirable influence on drinking water quality. In this study, we utilized a physically and chemically treated bentonite–chitosan composite (TBCH) for the removal of humic acid from aqueous solutions. Response surface methodology (RSM) using central composite design (CCD) was used to investigate the effects of pH, adsorbent dosage, humic acid concentration and contact time on the adsorption effectiveness of humic acid by TBCH. Isotherms, kinetics and thermodynamics have been also studied. An optimum condition for humic acid uptake was achieved at pH 4, 1.4 g/L adsorbent dosage, 40 mg/L humic acid concentration, and 115 min contact time. This study showed that modified bentonite and chitosan composite (TBCH) was a promising adsorbent for the removal of humic acid from aqueous solutions due to its significant removal efficiency, natural abundance and low cost; it may be an alternative to more costly available materials.
KW - Adsorption
KW - Bentonite
KW - Chitosan
KW - Humic acid
KW - Optimization
KW - Response surface methodology
UR - http://www.scopus.com/inward/record.url?scp=85055709711&partnerID=8YFLogxK
U2 - 10.1016/j.cherd.2018.10.011
DO - 10.1016/j.cherd.2018.10.011
M3 - Article
AN - SCOPUS:85055709711
SN - 0263-8762
VL - 140
SP - 102
EP - 115
JO - Chemical Engineering Research and Design
JF - Chemical Engineering Research and Design
ER -