标题：4-Aminoacetophenone Intercalated CoAl Layered Double Hydroxides: Synthesis, Characterization and Adsorptive Removal of Cd(II) ions from Water Samples
期刊名称：Pakistan Journal of Analytical & Environmental Chemistry
印刷版ISSN：1996-918X
电子版ISSN：2221-5255
出版年度：2021
卷号：22
期号：1
页码：139-149
DOI：10.21743/pjaec/2021.06.14
语种：English
出版社：National Centre of Excellence in Analytical Chemsitry
摘要：In the present study, CoAl-NO3 Layered Double Hydroxides (CoAl-NO3-LDH) was synthesizedand an enolate anion of 4-Aminoacetophenone (AAP) was intercalated into LDH following thereconstruction approach. The CoAl-NO3-LDH and CoAl-AAP-LDH were characterized byFourier-Transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electronmicroscope (SEM) and energy dispersive X-ray (EDX) analyses. CoAl-AAP-LDH worked wellfor 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 suchas Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherms fitted well to adsorptiondata 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 werecalculated and found to be 34.40 and 19.44 mg g-1, respectively. Sorption energy was calculatedand found to be 9.13 kJ mol-1, indicating chemisorption or ion exchange sorption mechanism. Themethod worked well for the adsorption of Cd(II) ions from wastewater samples.
