Abstract
Sodium alginate composite beads were synthesized using iron/nickel decorated palygorskite as filler by calcium chloride crosslink and applied to remove tetracycline (TC) from water efficiently. The beads were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The results suggested that the synergistic effect of nano iron/nickel and palygorskite could improve the adsorption performance of the beads for TC greatly. Batch adsorption experiments showed that the adsorption process fitted the Sips model and the maximum adsorption capacity of TC could reach 189.86 mg/g at 298 K, which was 31.6 times than that of pure sodium alginate and 4 times than that of palygorskite. The beads could be easily separated from water after adsorption using a mesh sieve. The adsorption mechanisms were mainly contributed to electrostatic attraction, π-π accumulation, hydrogen bond, silicate bond, chelation and ion exchange. In addition, the site energy distribution found that the surface of the adsorbents showed more heterogeneity at higher temperatures. The prepared beads could thus be used as a promising adsorbent for TC from water.
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.
