TY - JOUR
T1 - Adsorption of lead(II) onto magnetic chitosan@calcium phosphate rock biocomposite
AU - Billah, Rachid El Kaim
AU - Islam, Md Aminul
AU - Khan, Moonis Ali
AU - Nazal, Mazen K.
AU - Bahsis, Lahoucine
AU - Achak, Mounia
AU - Mahmoud, Alaa El Din
AU - Aziz, Md Abdul
AU - Jeon, Byong Hun
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2025/2/15
Y1 - 2025/2/15
N2 - A new magnetic chitosan@calcium phosphate rock (MCs@CPR) biocomposite was synthesized to be an efficient adsorbent for lead (II) adsorption from water. The composite was characterized by XRD, FTIR, SEM, XPS, BET, and point of zero charge (pHPZC) analysis. Batch adsorption experiments were performed under various conditions including contact time, pH, initial Pb(II) concentration, adsorbent dose, and temperature. Equilibrium data were fitted to kinetic and isotherm models while theoretical calculations were performed to gain insight into adsorption mechanism. The pseudo-second-order model well represented the kinetic data, while the monolayer adsorption capacity was 234.19 mg g−1 at 25 °C. The Pb(II) uptake process was spontaneous and endothermic. Theoretical calculations exhibited a good correlation between the simulated and the experimental data. Pb(II) adsorption involved electrostatic interaction, ion exchange, pore filling, surface complexation, van der Waals (vdW) interaction, and precipitation. The presence of co-existing ions reduced Pb(II) uptake capacity. The composite showed reusability capability up to four cycles. The composite can be a promising adsorbent to decontaminate other emerging contaminants from actual wastewater.
AB - A new magnetic chitosan@calcium phosphate rock (MCs@CPR) biocomposite was synthesized to be an efficient adsorbent for lead (II) adsorption from water. The composite was characterized by XRD, FTIR, SEM, XPS, BET, and point of zero charge (pHPZC) analysis. Batch adsorption experiments were performed under various conditions including contact time, pH, initial Pb(II) concentration, adsorbent dose, and temperature. Equilibrium data were fitted to kinetic and isotherm models while theoretical calculations were performed to gain insight into adsorption mechanism. The pseudo-second-order model well represented the kinetic data, while the monolayer adsorption capacity was 234.19 mg g−1 at 25 °C. The Pb(II) uptake process was spontaneous and endothermic. Theoretical calculations exhibited a good correlation between the simulated and the experimental data. Pb(II) adsorption involved electrostatic interaction, ion exchange, pore filling, surface complexation, van der Waals (vdW) interaction, and precipitation. The presence of co-existing ions reduced Pb(II) uptake capacity. The composite showed reusability capability up to four cycles. The composite can be a promising adsorbent to decontaminate other emerging contaminants from actual wastewater.
KW - Adsorption
KW - Calcium phosphate rock
KW - Chitosan
KW - Hematite
KW - Lead (II)
KW - Wastewater
UR - http://www.scopus.com/inward/record.url?scp=85211216237&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2024.130249
DO - 10.1016/j.matchemphys.2024.130249
M3 - Article
AN - SCOPUS:85211216237
SN - 0254-0584
VL - 332
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 130249
ER -
