Modeling and optimization of nonylphenol removal from contaminated water media using a magnetic recoverable composite by artificial neural networks

Abstract

Herein, activated carbon impregnated iron oxide nanoparticles (FeO/AC) were synthesized to determine their potentials for the adsorption of nonylphenol (NP) in aqueous solution with different experimental variables, namely the pH of the solution, contact time, adsorbent dosage and the initial NP concentration. Additionally, an artificial neural network system was used to find the relative importance of each of the aforementioned input variables on NP adsorption efficiency. Experimental findings indicated that the optimum solution pH for NP adsorption was 3.0. The equilibrium time of the adsorption process was 30 min. According to the results of isotherm and kinetic studies, among all applied models, the Liu and pseudo-first-order models showed the best fit with the experimental data. The pH of the solution, compared to other input variables, had the maximum impacts on NP adsorption efficiency. Under optimum conditions, the adsorption percentage decreased insignificantly from 99.6 to 92.6% after the fifth cycle. Also, the adsorption efficiencies of 70.7, 73.5 and 67.3% were observed for river water, tap water and wastewater effluent, respectively. Ultimately, from the findings of this study, it can be postulated that FeO/AC nanoparticles can be recommended as a promising and novel adsorbent to remove NP from polluted groundwater.

Synthesis and physicochemical characterization of new calcined layered double hydroxide Mg Zn Co Al-CO3; classical modeling and statistical physics of nitrate adsorption

“…Of all the above mentioned techniques, adsorption has proved itself to be the most effective method in the remedial process, especially when a cheap adsorbent is used [23]. It is not only cost-effective, and simple and flexible in design, it is also highly efficient and environmentally friendly, allowing wastewater to be re-used through the regeneration process [24]. According to the literature, Chitosan beads [25], nano-alumina [26], activated carbon [27], modified wheat residue [28], powdered activated carbon, are the most commonly adsorbents used for removing of nitrate .…”

Adsorptive decontamination of doxycycline hydrochloride via Prosopis juliflora activated carbon: Parameter optimization and disposal study

“…Activated carbon has been greeted more by ecologists as compared with other adsorbents, because it has great porosity, cost‐effectiveness feature, and a higher adsorption capacity towards the contaminants. It also gives excellent results even at low concentrations of the pharmaceutical contaminants (Salimi et al, 2017). In the era of carbon adsorbents, different woods were widely explored because of their several beneficial physical and chemical characteristics.…”

“…However, the molecular structure, specific surface area, surface charge, and affinity towards adsorbate are the most essential features for the effective performance of a particular adsorbent (Nielsen & Bandosz, 2016). Thus, adsorption is a significantly important process from technological point of view, due to micro and macro porous nature of the materials (Salimi et al, 2017). Several traditional sorbents have been utilized for the uptake of pharmaceutical pollutants.…”

Investigation of the usage potential of calcium alginate beads functionalized with sodium dodecyl sulfate for wastewater treatment contaminated with waste motor oil

“…Complete removal of 20 mg/L of Co (II) was obtained in the presence of 1.2 g/L of MGAC for 90 min. In another study, nonylphenol (NP) in aqueous solution was adsorbed on activated carbon impregnated iron oxide nanoparticles (Fe 3 O 4 /AC) (Salimi et al, 2017). The optimum solution pH was found to be 3.0 for NP adsorption with 30 min equilibrium time of the adsorption process.…”