Abstract
Selective dissolution is widely used to adjust the surface state of LaMnO3 perovskite oxides. In this study, LaMnO3(LMO) with B-Site vacancies was synthesized using ascorbic acid to selectively remove Mn cations and enhance phosphate adsorption. The optimized LMO with Mn defects (LMO-AA3) presented large surface area, plenty of mesoporosity and suitable electronic structure. Particularly, the adsorption capacity (113.48 mg/g) of LMO-AA3 was about10 times that of LMO. Adsorption experiments showed adsorption occurred both chemically and physically on the heterogeneous adsorption surfaces, as the pseudo-second-order kinetic model and the Redlich-Peterson isotherm model predicted. The stimulated mechanism of LMO-AA3 achieved phosphate absorption through enhancing electrostatic attraction and ligand exchange by –OH groups. Regeneration testing showed that LMO-AA3 can be used for both high and low-concentration purification of phosphate. The selectively remove Mn cations method may offer an appropriate choice for enhancing the material characteristics of effective phosphate capture.
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.
