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).
Highlights
Due to the emergence of industrialization and urbanization worldwide, heavy metals are excessively produced and discharged into the environment
The correlation coefficient R2 for the pseudo-second-order model was higher than the pseudo-first-order and intraparticle diffusion models. These results suggest that the sorption kinetics of the Cr(III) ion on sodium dodecyl sulfate (SDS)-chitosan could be described by the pseudo-second-order model, that the chemical adsorption could be the rate-limiting step of the process of the adsorption system
The following conclusions can be drawn considering the results of this work: 1) The optimal conditions of the adsorption of Cr(III) using the SDS-modified chitosan beads were determined
Summary
Due to the emergence of industrialization and urbanization worldwide, heavy metals are excessively produced and discharged into the environment. Chromium is one of the most common pollutants as it is widely used in many industries such as electroplating, leather tanning, textiles, steelworks, wood preservation, artificial fertilizers and nuclear power stations [5] [6] [7]. Chromium mainly exists in two stable oxidation states in nature, namely Cr(VI) and Cr(III)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
