Removal of Iron(II) Using Ni/Al Layered Double Hydroxide Intercalated with Keggin Ion

Abstract

Layered double hydroxide (LDH) Ni/Al-NO3 was synthesized using a coprecipitation method under base condition following with intercalation using Keggin ion [a-SiW12O40]4- to form Ni/Al-[a-SiW12O40] LDH. The LDHs were characterized using XRD, FTIR, BET, and pHpzc analyses. Furthermore, LDHs were applied as adsorbent of iron(II) from aqueous solution. The adsorption process was studied through the effect of adsorption time, the concentration of iron(II), and temperature adsorption. The results show the interlayer distance of LDHs was increased from 7.408 Å to 10.533 Å after intercalation process. The adsorption of iron(II) on LDHs showed that adsorption of iron(II) on both LDHs follows pseudo first-order kinetic model with R2 value is close to one. The adsorption process was spontaneous, with adsorption capacity up to 36.496 mg g-1.

Adsorption of Fe(II) by Layered Double Hydroxide Composite with Carbon-Based Material (Biochar and Graphite): Reusability and Thermodynamic Properties

“…1. Ni/Al LDH had diffraction patterns at 11.63° (003); 23.00° (006); 35.16° (012); 39.56° (015); 47.4° (018) and 61.59° (110) [22]. These patterns show the formation of well-known layer structures at 11.63° (003) and 61.59° (110).…”

Utilization of Rambutan Peel as s Potential Adsorbent for the Adsorption of Malachite Green, Procion Red, and Congo Red Dyes

“…NiAl-LDH was prepared by the coprecipitation method (Lesbani et al, 2020). The molar ratio used for the 3: 1 LDH synthesis from a mixed solution with Ni(NO 3 ) 2 .6H 2 O 3 M and Al(NO 3 ) 3 .9H 2 O 1 M is added to the beaker.…”

Photocatalytic Degradation of Malachite Green by NiAl-LDH Intercalated Polyoxometalate Compound

“…NiAl-LDH doping with Fe 3+ and reduced graphene oxide (RGO) improved photocatalytic performance on spoiling ciprofloxacin. Li et al [8] informed Pt that modified ZnAl-LDH as a photocatalyst that effectively degrades ciprofloxacin. Furthermore, there are other researchers who have attention to modified LDH as a photocatalyst, such as Bi2O3/LDHs doped with Pd(II) for degrading methylene blue [9], CoAl-LDH with Bi2O3 greatly degrades rhodamine B that reached the highest removal 90.36% [10], CrO4 2− to replace interlayer anion on MgAl-LDH was efficiently enhanced photocatalysis performance for degrading methylene blue [11].…”