Modification of activated carbon with magnetic Fe3O4 nanoparticle composite for removal of ceftriaxone from aquatic solutions

Recently, Antibiotics have been extensively applied in various industries including agricultural, pharmaceutical and veterinary. Great concerns of antibiotics are about discharge into environment, especially water sources supplied for water demand over the world. The present study was developed to investigate the performance of powder activated carbon modified with magnetite nanoparticles (PAC-MNPs) in removal of Ceftriaxone from aquatic solutions with response surface methodology (RSM). A co-precipitation was applied to synthesize magnetized powdered activated carbon and its characteristics were analyzed with TEM, SEM and XRD. The effects of independent parameters pH (3�11), initial Ceftriaxone values (10�100 mg/L), temperature (298�313 K), and adsorbent dosage (1.05�2 g/L) on removal efficiency were analyzed by RSM based Box-Benhken Design (BBD). The optimum conditions for maximum removal of Ceftriaxone (97.18 with desirability of 0.9720) were recorded from desirability function (DF) at pH: 3.14, contact time: 90 min, adsorbent dosage: 1.99 g/L, initial concentration: 10 mg/L and temperature: 298 K. The survey of isotherms and Kinetics indicated that the experimental data are fitted to Langmuir and second-pseudo-order models. Thermodynamic studies revealed that the CTX removal was spontaneous and exothermic. Regeneration experiments were performed for 6 cycles and the results indicate a removal efficiency loss of <10. © 201

Modification of activated carbon with magnetic Fe<inf>3</inf>O<inf>4</inf>nanoparticle composite for removal of ceftriaxone from aquatic solutions

Abstract Recently, Antibiotics have been extensively applied in various industries including agricultural, pharmaceutical and veterinary. Great concerns of antibiotics are about discharge into environment, especially water sources supplied for water demand over the world. The present study was developed to investigate the performance of powder activated carbon modified with magnetite nanoparticles (PAC-MNPs) in removal of Ceftriaxone from aquatic solutions with response surface methodology (RSM). A co-precipitation was applied to synthesize magnetized powdered activated carbon and its characteristics were analyzed with TEM, SEM and XRD. The effects of independent parameters pH (3−11), initial Ceftriaxone values (10–100 mg/L), temperature (298–313 K), and adsorbent dosage (1.05–2 g/L) on removal efficiency were analyzed by RSM based Box-Benhken Design (BBD). The optimum conditions for maximum removal of Ceftriaxone (97.18% with desirability of 0.9720) were recorded from desirability function (DF) at pH: 3.14, contact time: 90 min, adsorbent dosage: 1.99 g/L, initial concentration: 10 mg/L and temperature: 298 K. The survey of isotherms and Kinetics indicated that the experimental data are fitted to Langmuir and second-pseudo-order models. Thermodynamic studies revealed that the CTX removal was spontaneous and exothermic. Regeneration experiments were performed for 6 cycles and the results indicate a removal efficiency loss of <10%. Keywords Adsorption Powdered activated carbon (PAC) Fe3O4 Ceftriaxine Response Surface Methodology (RSM

In situ functionalization of a cellulosic-based activated carbon with magnetic iron oxides for the removal of carbamazepine from wastewater

The main goal of this work was to produce an easily recoverable waste-based magnetic activated carbon (MAC) for an efficient removal of the antiepileptic pharmaceutical carbamazepine (CBZ) from wastewater. For this purpose, the synthesis procedure was optimized and a material (MAC4) providing immediate recuperation from solution, remarkable adsorptive performance and relevant properties (specific surface area of 551 m2 g-1 and saturation magnetization of 39.84 emu g-1) was selected for further CBZ kinetic and equilibrium adsorption studies. MAC4 presented fast CBZ adsorption rates and short equilibrium times (< 30-45 min) in both ultrapure water and wastewater. Equilibrium studies showed that MAC4 attained maximum adsorption capacities (qm) of 68 ± 4 mg g-1 in ultrapure water and 60 ± 3 mg g-1 in wastewater, suggesting no significant interference of the aqueous matrix in the adsorption process. Overall, this work provides evidence of potential application of a waste-based MAC in the tertiary treatment of wastewaters.publishe

Modification of activated carbon with magnetic Fe3O4 nanoparticle composite for removal of ceftriaxone from aquatic solutions

Recently, Antibiotics have been extensively applied in various industries including agricultural, pharmaceutical and veterinary. Great concerns of antibiotics are about discharge into environment, especially water sources supplied for water demand over the world. The present study was developed to investigate the performance of powder activated carbon modified with magnetite nanoparticles (PAC-MNPs) in removal of Ceftriaxone from aquatic solutions with response surface methodology (RSM). A co-precipitation was applied to synthesize magnetized powdered activated carbon and its characteristics were analyzed with TEM, SEM and XRD. The effects of independent parameters pH (3�11), initial Ceftriaxone values (10�100 mg/L), temperature (298�313 K), and adsorbent dosage (1.05�2 g/L) on removal efficiency were analyzed by RSM based Box-Benhken Design (BBD). The optimum conditions for maximum removal of Ceftriaxone (97.18 with desirability of 0.9720) were recorded from desirability function (DF) at pH: 3.14, contact time: 90 min, adsorbent dosage: 1.99 g/L, initial concentration: 10 mg/L and temperature: 298 K. The survey of isotherms and Kinetics indicated that the experimental data are fitted to Langmuir and second-pseudo-order models. Thermodynamic studies revealed that the CTX removal was spontaneous and exothermic. Regeneration experiments were performed for 6 cycles and the results indicate a removal efficiency loss of <10. © 201

Modification of activated carbon with magnetic Fe3O4 nanoparticle composite for removal of ceftriaxone from aquatic solutions

Recently, Antibiotics have been extensively applied in various industries including agricultural, pharmaceutical and veterinary. Great concerns of antibiotics are about discharge into environment, especially water sources supplied for water demand over the world. The present study was developed to investigate the performance of powder activated carbon modified with magnetite nanoparticles (PAC-MNPs) in removal of Ceftriaxone from aquatic solutions with response surface methodology (RSM). A co-precipitation was applied to synthesize magnetized powdered activated carbon and its characteristics were analyzed with TEM, SEM and XRD. The effects of independent parameters pH (3�11), initial Ceftriaxone values (10�100 mg/L), temperature (298�313 K), and adsorbent dosage (1.05�2 g/L) on removal efficiency were analyzed by RSM based Box-Benhken Design (BBD). The optimum conditions for maximum removal of Ceftriaxone (97.18 with desirability of 0.9720) were recorded from desirability function (DF) at pH: 3.14, contact time: 90 min, adsorbent dosage: 1.99 g/L, initial concentration: 10 mg/L and temperature: 298 K. The survey of isotherms and Kinetics indicated that the experimental data are fitted to Langmuir and second-pseudo-order models. Thermodynamic studies revealed that the CTX removal was spontaneous and exothermic. Regeneration experiments were performed for 6 cycles and the results indicate a removal efficiency loss of <10. © 201

A new dendrimer-functionalized magnetic nanosorbent for the efficient adsorption and subsequent trace measurement of Hg (II) ions in wastewater samples

A new dendrimer-functionalized magnetic nanosorbent for the efficient adsorption and subsequent trace measurement of Hg (II) ions in wastewater samples was successfully synthesized. The synthesis is accomplished via the Michael addition reaction of the amino groups of the silica-coated magnetic nanoparticles (APTES-modified Fe3O4@SiO2) with the double bond of methyl acrylate followed by the amidation of the resulting methyl ester with ethylene diamine. Following that, some donor functional groups were attached to the dendrimer via a specific chemical reaction to offer a further selectivity to the dendrimer-based nanosorbent. Once the synthesis is accomplished, the as-prepared nanosorbent was characterized by several analytical techniques such as FT-IR, SEM, VSM, TGA and EDX. Following that, Hg (II) ions were adsorbed onto the active sites of the sorbent through the complexation with the dentates (-N, -S) of the dispersed sorbent, which seems to be the cornerstone of the adsorption process. In the next step, the ions were desorbed off the sorbent and measured by a cold vapor atomic absorption spectrometer (CV-AAS). The impact of a number of influential variables such as pH, sorbent dosage, adsorption time, elution features were assessed and subsequently optimized. Under the optimal conditions, a relatively wide linearity was obtained for the analyte of interest in the range of 0.08�6.0 μg/L with the correlation coefficients (R2) of 0.9922 and the method detection limit (MDL) was determined to be 0.03 μg/L. Satisfactory relative recoveries of the analyte varied within 90.0�106.7 with the relative standard deviations (RSD) of 2.1�5.3. In addition, a number of experiments with regard to the equilibrium adsorption isotherms of the target ion was performed which well fitted to the Langmuir isotherm model. Finally, the results indicated that the whole method was sensitive, effective and practical for the adsorption and trace measurement of Hg (II) in wastewater samples. © 202