Accepted Manuscript Molecular mechanism of anionic dyes adsorption on cationized

Accepted Manuscript
Molecular mechanism of anionic dyes adsorption on cationized
rice husk cellulose from agricultural wastes
Zhihong Jiang, Dongying Hu
PII:
S0167-7322(18)34124-2
DOI:
https://doi.org/10.1016/j.molliq.2018.11.153
Reference:
MOLLIQ 10063
To appear in:
Journal of Molecular Liquids
Received date:
9 August 2018
Revised date:
7 November 2018
Accepted date:
28 November 2018
Please cite this article as: Zhihong Jiang, Dongying Hu , Molecular mechanism of anionic
dyes adsorption on cationized rice husk cellulose from agricultural wastes. Molliq (2018),
https://doi.org/10.1016/j.molliq.2018.11.153
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ACCEPTED MANUSCRIPT
1 
Molecular 
mechanism 
of 
anionic 
dyes 
adsorption on cationized rice husk cellulose 
from agricultural wastes 
Zhihong Jiang • Dongying Hu* 
School of Resources, Environment and Materials, Guangxi University, 
No. 100 Daxue East Road, Nanning 530004, China. 
*Corresponding author (Dongying Hu). Tel: +86-771-3232200. 
E-mail address: hdygxu@163.com (Dongying Hu) 
848391032@qq.com (Zhihong Jiang) 
ACCEPTED MANUSCRIPT

ACCEPTED MANUSCRIPT
2 
Abstract 
Cationized rice husk cellulose (CRHC) were designed and synthesized by 
introducing hydroxypropyloctadecyldimethylammonium group onto rice husk 
cellulose (RHC) molecular structure. Structure and morphology of samples were 
characterized by FTIR, XRD and SEM. The characterization results showed that the 
molecular structure and morphology of RHC have changed and the quaternary 
ammonium group was successfully grafted onto the RHC molecular structure. 
Adsorption studies were conducted to evaluate the adsorption performance and related 
mechanism of Diamine Green B (DG-B), Acid Black 24 (AB-24) and Congo Red (CR) 
onto CRHC. The adsorption process was well described by Pseudo-second-order and 
Langmuir models. The Langmuir maximum adsorption capacity of DG-B, AB-24 and 
CR on the CRHC was found to be 207.15, 268.88 and 580.09 mg g
-1
at 303.15 K, 
respectively. The possible adsorption mechanism might be due to the combination of 
molecular structure characteristics of adsorbents and adsorbates, electrostatic 
attraction, hydrogen bonding, and the competition of OH
−
ions. CRHC has a good 
reusability and high adsorption performance for dye removal. The thermodynamic 
parameters indicated the adsorption process is a spontaneous and feasible purification 
process, increasing the temperature is conducive to the adsorption process.