Application of Magnetically Activated Carbon for the Separation of Nicotinic Acid from Aqueous Solution

Abstract

The adsorption of nicotinic acid molecules from their solution in the aqueous phase was studied in batch mode by using magnetically activated carbon (M-AC) as the adsorbent. Activated carbon was magnetized by a coprecipitation method. The effects of the amount of adsorbent (0.25 to 5 g•L −1 ), initial acid concentration (2.46 to 14.77 g•L −1 or 0.02 to 0.12 mol•L −1 ), contact time (0 to 120 min), and temperature (298 to 333 K) on the percentage removal were investigated. Theoretically (from the Langmuir isotherm), an adsorption capacity of 23.28 g•g −1 was obtained by M-AC for acid removal. Equilibrium isotherms such as the Langmuir, the Freundlich, and the Temkin were applied to determine equilibrium parameters and to fit the equilibrium data, out of which the Langmuir gave the best match to the results. Nicotinic acid adsorption kinetics was modeled with pseudo-first order, pseudo-second order, and intraparticle diffusion models. The kinetic data was best described by the pseudo-second-order model. Thermodynamic parameters such as ΔH o , ΔS o , and ΔG o were calculated, and their values pointed out that the adsorption of acid molecules onto M-AC was exothermic and the process was spontaneous.

Surface Interactions during the Removal of Emerging Contaminants by Hydrochar-Based Adsorbents

“…Maximum adsorption capacities (Q 0 ) in the range of 15.2-97.8 mg g −1 were obtained. These values are quite larger than those obtained by Datta [21], Ayrancy and Dumas [28], and Qureshi et al [29], who used commercial adsorbents with high values of surface area.…”

“…On the other hand, nicotinic acid (IUPAC name: pyridine-3-carboxylic acid, commonly named Vitamin B3) is used as a medicine to decrease the risk of anemia and cardiovascular events [20], although it has also been associated with carcinogenic effects. Very few studies have been devoted to the investigation of nicotinic acid removal by adsorption processes onto commercial ACs [21], and, to date, none of them have used biomass-based adsorbents.…”

Removal of Bisphenol-A Using Amine-Modified Magnetic Multiwalled Carbon Nanotubes: Batch and Column Studies

“…The raw MWCNTs were magnetized by the same procedure as followed in the previous study. , The process started with oxidation of 7 g of MWCNTs in 100 mL of HNO 3 (69%), after which they were subjected to constant stirring in a mixture of FeSO 4 ·7H 2 O and FeCl 3 for the precipitation of Fe 3 O 4 at 373 K. The ratio Fe 2+ and Fe 3+ was maintained as 1:2, and the mass ratio of (Fe 2+ + Fe 3+ ) and AC was kept at 4:1. The precipitation of Fe 3 O 4 only takes place when the pH of the solution is maintained between 10 and 12. , To maintain the pH, 5 M NaOH solution was added dropwise. After 2 h of stirring, the solution is kept for aging at 373 K for 4 h. The magnetized MWCNTs (m-MWCNTs) were then filtered out and washed with deionized water and ethanol to remove the excess iron, followed by drying at 373 K in a hot-air oven.…”

Sulardan Vitamin Arıtımı: Nikotinik Asit Adsorpsiyonu

“…Nikotinik asitin adsorpsiyonu konusunda literatürde çok sınırlı sayıda çalışma bulunmaktadır. Datta ve diğ., nikotinik asit adsorpsiyonunu manyetik aktif karbon kullanarak incelemişlerdir [16]. Dancu ve diğ., nano boyuttaki hidroksiapatit ve modifiye edilmiş hidroksiapatit kullarak nikotinik asit adsorpsiyonunu çalışmışlardır [17].…”

“…Bununla birlikte kimya, biyokimya ve terapötik alanda geniş bir uygulaması bulunmaktadır. Gıda katkılarında, hayvan yemlerinde, kozmetikte ve bilim teknolojinin diğer bir çok alanında genişleyen uygulama alanları vardır [16]. Ayrıca dislipidemi tedavisinde yaygın olarak kullanılmakta ve yüksek kolestrol seviyelerini düşürmek ve kontrol etmeye yardımcı olacak çok önemli bir hipolipidemik ilaç olduğu düşünülmektedir [17].…”