Influence of a cationic surfactant on adsorption of p-nitrophenol by a magsorbent based on magnetic alginate beads

Abstract

The paper focuses on the removal of p-nitrophenol by an adsorption process. A magnetic adsorbent was synthesized by encapsulation of magnetic functionalized nanoparticles using alginate as a green biopolymer matrix. A cationic surfactant, cetylpyridinium chloride (CPyCl), was used to confer a hydrophobic character to the magnetic beads and thus to promote their adsorption efficiency. The effect of different parameters such as initial concentrations of both PNP and CPyCl, contact time and solution pH value on the adsorption of PNP in the presence of CPyCl was investigated. It should be noted that combination of magnetic and adsorption properties in a same material is an interesting challenge which could overcome the recovery problems of pollutant-loaded adsorbent. min whereas 90% adsorption was attained within 2 hours. It should be noted that combination of magnetic and adsorption properties in a same material is an interesting challenge which could overcome the recovery problems of pollutant-loaded adsorbent.

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

“…A cationic surfactant, cetylpyridinium chloride (CPyCl), is used to confer a hydrophobic character to the magnetic beads and thus to promote their adsorption efficiency [261]. Magnetic porous silica-GO hybrid composites (Fe3O4@mSiO2/GO) show good performance in removing p-nitrophenol from aqueous solution [262].…”

Biocarbon Derived from Opuntia ficus indica for p-Nitrophenol Retention

“…Regardless of the parameter under study, the experiments were performed in a batch reactor by contacting a mass of the active carbon with 10 mL of p-NP solution (C i , mg/L) and brought to the desired temperature and pH. The mixture is stirred, and after the given time, the samples are centrifuged and the residual concentration is measured using the method detailed by Obeid et al [18]. This method involves mixing equal volumes of the p-NP solution to be analyzed and a solution of sodium carbonate (0.5 mol/L) to ensure complete conversion to phenolate ions.…”

“…These techniques include the biological degradation [9], chemical precipitation [10], degradation [11][12][13][14][15], and adsorption on solid supports [1,5,16,17]. Among these techniques, adsorption has proved to be the easiest with good efficiency [1,8,18] and the most used adsorbents to eliminate a wide variety of pollutants are activated carbons due to their highly developed porosity, good thermal stability, and variable surface area [19][20][21][22][23][24]. However, activated carbon is expensive, and its regeneration for possible reuse remains limited and makes it more expensive.…”

Adsorption Removal of Various Nitrophenols in Aqueous Solution by Aminopropyl-Modified Mesoporous MCM-48

“…Different water treatment technologies have been used to remove the nitrophenols and their analogues, including electrochemical reduction, photocatalytic degradation, electro-Fenton degradation, catalytic oxidation, reverse osmosis, biological treatment, membrane separation, and adsorption. − Among these methods, adsorption is still considered the preferred method, especially for the effluents with moderate to low pollutant concentrations due to the advantages of cost-effective, highly efficient, and simple operation. ,, Moreover, it is possible to recover the adsorbent and adsorbate. Hence, the adsorption of nitrophenols and its analogues on different adsorbents has been widely investigated by researchers. ,,,,− …”