Abstract
The composites of hydroxyapatite and SiO2 were successfully synthesized. The hydroxyapatite was prepared from golden snail shells (Pomacea canaliculata L). The hydroxyapatite and hydroxyapatite-SiO2 composites were characterized using XRD, FTIR, SEM-EDS. Furthermore, hydroxyapatite and hydroxyapatite-SiO2 composites were used to remove Pb(II) from aqueous solution. Various adsorption parameters such as pH of the solution, contact time, and initial Pb(II) concentration were used to study the adsorption process. The optimum pH of the solution for removal of Pb(II) by hydroxyapatite and hydroxyapatite-SiO2 composite at pH 6 and contact time at 60 minutes. Both adsorbents follow the Langmuir isotherm. The maximum adsorption capacity of the hydroxyapatite-SiO2 composite is greater compare to hydroxyapatite, respectively 135.14 and 123.46 mg/g. The pseudo-second order kinetic model had a correlation coefficient (R2) greater than the pseudo-first order so pseudo-second order kinetic is better to describe adsorption kinetics
Highlights
The composites of hydroxyapatite and SiO2 were successfully synthesized
The XRD pattern of the hydroxyapatite-SiO2 composite is a combination of hydroxyapatite and silica peak, and there is no shift in the 2θ
In this study, hydroxyapatite was successfully synthesized from golden snail shells (Pomacea canaliculata L)
Summary
The composites of hydroxyapatite and SiO2 were successfully synthesized. The hydroxyapatite was prepared from golden snail shells (Pomacea canaliculata L). The adsorption capacity can be increased by combined hydroxyapatite with other materials to become a composite. The pHpzc was determined from the graph of the ΔpH(pHfpHi) versus pHi. Batch Adsorption Process The effect of the pH solution is carried out in the range 2-10 was determined by adding 20 mg of hydroxyapatite-SiO2 composite to 25 mL Pb(II) solution with a concentration of 50 mg/L.
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.
