Research articles
ScienceAsia 48 (2022):ID 588-595 |doi:
10.2306/scienceasia1513-1874.2022.077
Adsorption of Ni2+ on malic acid modified activated carbon
from Phragmites australis
Dongmei Hea, Jian Zhanga,*, Zhenxin Shangb, Chenglu Zhangb
ABSTRACT: To tackle the issue of environmental pollution caused by heavy metal ions, a novel malic acid modified
activated carbon (denoted as MA-AC) from (the plant) Phragmites australis has been successfully prepared with
high Ni2+
adsorption capacity (38.36 mg/g). The physical and chemical characteristics of MA-AC were evaluated
by N2
adsorption/desorption, Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), and X-ray
Photoelectron Spectroscopy (XPS). The results indicated that the MA-AC has more microporous structures and more
oxygen bearing functional groups than the unmodified AC (denoted as AC). The Ni2+
adsorption behaviors of the
adsorbents were investigated by batch experiments, which indicated that the MA-AC showed 38% higher Ni2+
adsorption capacity than the unmodified AC. The adsorption isotherms and the kinetics of the absorbents agreed
well with the Langmuir model and the pseudo-second-order model. The Ni2+
adsorption mechanisms of MA-AC were
investigated by FTIR and XPS analyses. The results from the analyses indicated that the enhanced surface adsorption
of Ni2+
on MA-AC are attributed to the chemistry between the Ni2+
and the oxygen-containing functional groups on
the surface.
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| a |
Department of Chemical Engineering and Materials, Jining University, Shandong 273155 China |
| b |
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and
Engineering, Shandong University, Jinan 250100 China |
* Corresponding author, E-mail: sduchemzhang@163.com
Received 8 Oct 2021, Accepted 3 Mar 2022
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