Abstract
A La(III)-loaded granular ceramic adsorbent, consisting mainly of different forms of metal oxide minerals, was developed for phosphorus removal from aqueous solution. Batch experiments were performed to investigate the effects of various experimental parameters, such as contact time (3–48h), initial phosphorus concentration (5–25mg/L), pH (2.0–12.0), temperature (20, 30 and 40°C) and anions on phosphorus adsorption. The adsorption process was well described by a pseudo-second-order kinetic model and equilibrium was achieved at 30h. The adsorption data closely fitted the Langmuir isotherm model at temperatures ranging from 20°C to 40°C. Thermodynamic study indicated a spontaneous, favorable and exothermic adsorption on the La(III)-loaded granular ceramic adsorbent. The optimum pH for phosphorus removal ranged from 7.0 to 9.0. Phosphorus adsorption was impeded by the presence of F−, followed by Cl−, SO42− and NO3− and the adsorption process appeared to be controlled by a chemical precipitation process. The mechanism may involve ion complexation during subsequent adsorption of phosphorus on lanthanum hydroxides.
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 callMore From: Journal of the Taiwan Institute of Chemical Engineers
Disclaimer: 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.
