Abstract:Magnetic carboxyl functional nanoporous polymer (MCFNP) was chemically fabricated by incorporation of magnetic Fe3O4 precursor into the carboxyl functional nanoporous polymer (CFNP). The as-synthesized MCFNP was characterized and used as an adsorbent for rapid adsorption removal of methylene blue (MB) from wastewater. Several experimental parameters affecting the adsorption efficiency were investigated including initial pH, adsorbent dosage, initial MB concentration, contact time and temperature. The adsorptio… Show more
“…For instance, q m for a magnetic cellulose-graphene oxide composite (MCGO) was found 70.03 mg g À1 and for a polycatechol modied Fe 3 O 4 magnetic nanoparticles (Fe 3 O 4 /PCC MNPs) was measured 60.06 mg g À1 . 63,64 Magnetic carboxyl functional nanoporous polymer, MCFNP showed a maximum adsorption capacity of 57.74 mg g À1 for MB at 298 K. 65 This comparison of the measured yet again indicates the remarkable adsorption ability of our as-synthesized M3D-PAA-CCN for the cationic dye. Solution pH signicantly affects the adsorption capacity of cationic dye molecules and the zeta potential of adsorbents.…”
A low-cost, highly efficient, and recyclable magnetic nanocomposite has been developed from polyacrylic acid and carboxylated cellulose nanocrystals for the removal of cationic dyes from the wastewater.
“…For instance, q m for a magnetic cellulose-graphene oxide composite (MCGO) was found 70.03 mg g À1 and for a polycatechol modied Fe 3 O 4 magnetic nanoparticles (Fe 3 O 4 /PCC MNPs) was measured 60.06 mg g À1 . 63,64 Magnetic carboxyl functional nanoporous polymer, MCFNP showed a maximum adsorption capacity of 57.74 mg g À1 for MB at 298 K. 65 This comparison of the measured yet again indicates the remarkable adsorption ability of our as-synthesized M3D-PAA-CCN for the cationic dye. Solution pH signicantly affects the adsorption capacity of cationic dye molecules and the zeta potential of adsorbents.…”
A low-cost, highly efficient, and recyclable magnetic nanocomposite has been developed from polyacrylic acid and carboxylated cellulose nanocrystals for the removal of cationic dyes from the wastewater.
“…However, a chemical coupling may be present at the interface between the oxide and alloy and it will provide synergy between phases, which justifies the better adsorption capacity of the mixed phases compared to the same isolated phases (Figure 7). Table 3 shows the adsorption capacity of methylene blue from different adsorbents studied in the literature and compared with the present study [60][61][62][63][64][65]. It is possible to notice that the solid Fe 2 SiO 4 -Co 7 Fe 3 -SBA-15-700-2.0 which presented the best adsorption capacity has promising results compared to other solids containing Fe.…”
Section: Magnetic Properties (Vsm Mzfc and Mfc)mentioning
The mixture containing alloy and oxide with iron-based phases has shown interesting properties compared to the isolated species and the synergy between the phases has shown positive effect on dye adsorption. This paper describes the synthesis of Fe2SiO4-Fe7Co3-based nanocomposite dispersed in Santa Barbara Amorphous (SBA)-15 and its application in dye adsorption followed by magnetic separation. Thus, it was studied the variation of reduction temperature and amount of hydrogen used in synthesis and the effect of these parameters on the physicochemical properties of the iron and cobalt based oxide/alloy mixture, as well as the methylene blue adsorption capacity. The XRD and Mössbauer results, along with the temperature-programmed reduction (TPR) profiles, confirmed the formation of Fe2SiO4-Fe7Co3-based nanocomposites. Low-angle XRD, N2 isotherms, and TEM images show the formation of the SBA-15 based mesoporous support with a high surface area (640 m2/g). Adsorption tests confirmed that the material reduced at 700 °C using 2% of H2 presented the highest adsorption capacity (49 mg/g). The nanocomposites can be easily separated from the dispersion by applying an external magnetic field. The interaction between the dye and the nanocomposite occurs mainly by π-π interactions and the mixture of the Fe2SiO4 and Fe7Co3 leads to a synergistic effect, which favor the adsorption.
“…At the equilibrium, the ball-milled MoS 2 for 40 hours nanopowders have an adsorption capacity of ~113 mg g −1 . This value is significantly higher of the adsorption capacity for many examples of MB adsorbent described in the literature 60–63 .Figure 7MB adsorption onto the ball-milled MoS 2 for 40 hours ( a ) (the line is guide for eye); adsorption kinetic of MB onto the ball-milled MoS 2 for 40 hours compared with the pseudo-second-order model ( b ).…”
Two-dimensional (2D) nanomaterials have received much attention in recent years, because of their unusual properties associated with their ultra-thin thickness and 2D morphology. Besides graphene, a new 2D material, molybdenum disulfide (MoS2), has attracted immense interest in various applications. On the other hand, ball-milling process provides an original strategy to modify materials at the nanometer scale. This methodology represents a smart solution for the fabrication of MoS2 nanopowders extremely-efficient in adsorbing water contaminants in aqueous solution. This work reports a comprehensive morphological, structural, and physicochemical investigation of MoS2 nanopowders treated with dry ball-milling. The adsorption performances of the produced nanopowders were tested using methylene blue (MB) dye and phenol in aqueous solution. The adsorption capacity as a function of ball-milling time was deeply studied and explained. Importantly, the ball-milled MoS2 nanopowders can be easily and efficiently regenerated without compromising their adsorption capacity, so to be reusable for dye adsorption. The eventual toxic effects of the prepared materials on microcrustacean Artemia salina were also studied. The present results demonstrate that ball-milling of MoS2 offers a valid method for large-scale production of extremely efficient adsorbent for the decontamination of wastewaters from several pollutants.
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