TITLE:
Adsorption of Cr(III) from an Aqueous Solution by Chitosan Beads Modified with Sodium Dodecyl Sulfate (SDS)
AUTHORS:
Munkhpurev Bat-Amgalan, Zoltuya Khashbaatar, David Eva Vanessa Anak, Muhammad Nabil Md Sari, Naoto Miyamoto, Naoki Kano, Hee-Joon Kim, Ganchimeg Yunden
KEYWORDS:
Chitosan Beads, Sodium Dodecyl Sulfate (SDS), Trivalent Chromium Ions (Cr(III)), Adsorption, Adsorption Isotherms, Adsorption Kinetics
JOURNAL NAME:
Journal of Environmental Protection,
Vol.12 No.11,
November
26,
2021
ABSTRACT: This study is to prepare chitosan beads modified with sodium dodecyl sulfate (SDS) to effectively remove Cr(III) from an aqueous solution. The characterizations of SDS-chitosan by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), Fourier transform-infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) proved the successful synthesis of the adsorbent. The adsorption of Cr(III) on the SDS material was investigated by varying experimental conditions such as pH, contact time and adsorbent dosage. The maximum adsorption capacity of SDS-chitosan for Cr(III) was estimated to be 3.42 mg?g-1. The results of adsorption kinetics and isothermal models show that the adsorption process conforms to the pseudo-second-order and Langmuir isotherm models, indicating that the adsorption is single-layer chemical adsorption. Thermodynamic analyses indicate that the adsorption of Cr(III) is an endothermic reaction. These results show that the new adsorbent has obvious application prospect to eliminate Cr(III).