Removal of phosphate and nitrate ions aqueous using strontium magnetic graphene oxide nanocomposite: Isotherms, kinetics, and thermodynamics studies

Abstract

Magnetic Fe3O4 nanoparticle decorated graphene oxide (GO) was modified with strontium nanoparticles (MGO‐Sr) and applied for enhanced removal of phosphate and nitrate ions from river and sewage water samples. The nanocomposite's features were investigated using Fourier transform‐infrared spectrometry, field emission‐scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, and X‐ray diffraction. The effective parameters, adsorption efficiency, regeneration, and field application of MGO‐Sr were also studied. Adsorption isotherm and kinetic models were applied for evaluation of experimental adsorption process. The data was in well comply with Langmuir isotherm and pseudo‐second‐order comparing with other models. Langmuir maximum adsorption capacity was obtained equal to 238.09 mg/g for phosphate and 357.14 mg/g for nitrate. Van't Hoff thermodynamic predicted an exothermic nature for adsorption process followed by a physisorption mechanism. The prepared nanocomposite provided a high‐removal efficiency toward phosphate and nitrate ions in river and sewage water. Hence, it is applicable in water remediation process.

A comprehensive review on nitrate and phosphate removal and recovery from aqueous solutions by adsorption

“…In the adsorbent design and adsorption process study, the thermodynamic parameters are required to understand the effect of temperature on the adsorption behavior of a pollutant on an adsorbent. It also helps to understand the possibility and nature of the adsorption process (Sereshti et al 2020). Some thermodynamic parameters related to the adsorption process are changes in standard free energy (ΔG o ), enthalpy (ΔH o ), and entropy (ΔS o ), which are calculated using thermodynamic equations.…”

“…A negative value of ΔH o indicates the exothermic nature of the sorption process (Chatterjee & Woo 2009;Deng & Shi 2015). A positive ΔS o value shows that randomness is enhanced whereas a negative value indicates a decrease in randomness at the solid/liquid interface during the adsorption process (Sereshti et al 2020). Negative values of ΔG o , ΔH o , and ΔS o show the exothermic and spontaneous nature of the adsorption process (Esmaeili Bidhendi et al 2019).…”

“…Endothermic (Rajeswari et al 2016;Rezaei Kalantary et al 2016;Song et al 2016), and exothermic nature of the adsorption process (Chatterjee & Woo 2009;Deng & Shi 2015) was observed by a positive and negative value of enthalpy (ΔH o ), respectively. A positive and negative value of entropy (ΔS o ) shows that randomness is enhanced while negative values of entropy (ΔS o ) show a decrement of randomness at the solid/liquid interface during the adsorption process (Sereshti et al 2020). Negative values of ΔG o , ΔH o , and ΔS o show the exothermic and spontaneous nature of the adsorption process (Esmaeili Bidhendi et al 2019).…”

High adsorption of methylene blue from water onto graphenic materials: Effect of degree of graphitization and analysis of kinetic models

“…Some advantages of the adsorption process are its low cost, ease of operation, efficiency, simple design, and the recovery and recycling of adsorbents. 5,[9][10][11][12][13][14] An adsorbent must have certain characteristics for its industrial application, such as high selectivity, high removal capacity, fast removal kinetics, a regenerative capacity, andthe most important factorlow cost.…”

Nano-Size Biomass Derived from Pomegranate Peel for Enhanced Removal of Cefixime Antibiotic from Aqueous Media: Kinetic, Equilibrium and Thermodynamic Study

“…Based on the frequent inability of conventional wastewater treatment methods to remove or reduce the number of unwanted antibiotics to the published control standards, several more effective treatment methods based on photocatalytic degradation [14][15][16], oxidation, biodegradation, electro-degradation, and adsorption have been introduced [17,18]. Adsorption is considered to be the most attractive treatment method owing to its significant benefits such as economic features, reliability, and its ability to prevent the entry of secondary toxic substances by restricting their transfer into the aquatic environment [19,20]. Researchers have studied the capabilities of different adsorbents in relation to antibiotic adsorption such as metal-organic framework, carbon-based material, montmorillonite, zeolite, graphene oxide and activated carbon [21][22][23][24].…”