4-Aminoacetophenone Intercalated CoAl Layered Double Hydroxides: Synthesis, Characterization and Adsorptive Removal of Cd(II) ions from Water Samples

  • Abdul Rafy Bhatti Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan
  • Ali Nawaz Siyal Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan
  • Muhammad Hassan Agheem
  • Qadeer Khan Panhwar Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan
  • Adnan Ahmed Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan
  • Muhammad Yar Khuhawar Institute of Chemistry, University of Sindh, Jamshoro 76080, Pakistan

Abstract

In the present study, CoAl-NO3 Layered Double Hydroxides (CoAl-NO3-LDH) was synthesized
and an enolate anion of 4-Aminoacetophenone (AAP) was intercalated into LDH following the
reconstruction approach. The CoAl-NO3-LDH and CoAl-AAP-LDH were characterized by
Fourier-Transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron
microscope (SEM) and energy dispersive X-ray (EDX) analyses. CoAl-AAP-LDH worked well
for adsorption of Cd(II) ions from aqueous samples at optimum pH 7, adsorbent dosage 25 mg,
concentration of Cd(II) ions 25 mg L-1 and shaking time 20 min at 25 °C. Different isotherms such
as Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherms fitted well to adsorption
data with correlation coefficient (R2) of 0.998, 0.982 and 0.992, respectively. Monolayered (Qm)
and multi-layered (KF) capacities of CoAl-AAP-LDH for adsorption of Cd(II) ions were
calculated and found to be 34.40 and 19.44 mg g-1, respectively. Sorption energy was calculated
and found to be 9.13 kJ mol-1, indicating chemisorption or ion exchange sorption mechanism. The
method worked well for the adsorption of Cd(II) ions from wastewater samples.

Published
Jun 23, 2021
How to Cite
BHATTI, Abdul Rafy et al. 4-Aminoacetophenone Intercalated CoAl Layered Double Hydroxides: Synthesis, Characterization and Adsorptive Removal of Cd(II) ions from Water Samples. Pakistan Journal of Analytical & Environmental Chemistry, [S.l.], v. 22, n. 1, p. 139-149, june 2021. ISSN 2221-5255. Available at: <http://pjaec.pk/index.php/pjaec/article/view/680>. Date accessed: 29 july 2021. doi: http://dx.doi.org/10.21743/pjaec/2021.06.14.