Nanocomposite-Based Aminated Polyethersulfone and Carboxylate Activated Carbon for Environmental Application. A Real Sample Analysis

Abstract

Aminated polyethersulfone (PES-NH 2 ) has been synthesized and used with carboxylated activated carbon (AC-COOH) as an adsorbent using two different methods: in situ and ex situ techniques. The chemical modification of polyethersulfone (PES) to introduce -NH 2 functions was used to overcome the hydrophobicity of PES which maximizes its use in water treatment applications whereas applying AC-COOH to this polymer provides a promising effective method as an adsorbent-separation technique to remove dye pollutants from wastewater. The structure and characterization of aminated polyethersulfone with carboxylated activated carbon (PES-NH 2 -AC-COOH) were identified using proton nuclear magnetic resonance ( 1 H-NMR), Fourier transform infrared (FT-IR spectroscopy), X-ray diffraction (XRD), thermal analysis (TA), and a scanning electron microscopy (SEM). The performance of PES-NH 2 in situ and ex situ with AC-COOH was tested for the adsorption of cationic (methylene blue) and anionic (acid red 1) dyes from an aquatic environment. The results of the study showed a better thermal stability for the PES-NH 2 with 20% AC-COOH with both in situ and ex situ techniques as well as an excellent adsorption performance in comparison with the bare PES-NH 2 . The resultant polymers displayed significantly high adsorption rates for the acid red dye (60% and 68%) and methylene blue dye (61% and 88%) by PES-NH 2 with AC-COOH using in situ and ex situ techniques, respectively, in comparison with the control (PES-NH 2 ) which showed lower adsorption rates for both dyes (21% for acid red and 33% for methylene blue). Lastly, the study experimental measurements found the most suitable model to describe the kinetic behavior of the acid red dye adsorption by our developed polymer (by PES-NH 2 with AC-COOH) to be the pseudo-second-order kinetic model.

Amino-Functionalized Fe3O4@SiO2 Core-Shell Magnetic Nanoparticles for Dye Adsorption

“…Only minor changes appear in the spectra of the Fe 3 O 4 @SiO 2 -NH 2 and Fe 3 O 4 @SiO 2 -NH 2 -EY samples. The appearance of a wide band near 3430 cm −1 is a more noticeable feature characteristic of the NH 2 amino group [ 14 ]. A small amount of covalently attached eosin Y in comparison with Fe 3 O 4 @SiO 2 -NH 2 NPs does not allow one to clearly see changes in the bending and stretching vibrations of the amino groups.…”

Poly(oligo(ethylene glycol) methyl ether methacrylate) Capped pH-Responsive Poly(2-(diethylamino)ethyl methacrylate) Brushes Grafted on Mesoporous Silica Nanoparticles as Nanocarrier

“…FTIR spectra confirmed the DOX loading into the nanocarriers via the clear appearance of two peaks at 1405 and 1576 cm −1 which were assigned to C–C stretches in the aromatic ring of the DOX molecule ( Figure S1 ). Furthermore, a significant increase in the peak at 1620 cm −1 was observed, which is assigned to N –H stretching mode [ 48 , 49 ]. The average particle size and zeta potential of DOX-loaded MSN-PDEAEMA were found to be similar to unloaded DOX ( Figure S2 ).…”

Nanocomposite Containing Cross‐linked Poly(Methyl‐Methacrylate)/Multiwall Carbon Nanotube as a Selective Y3+ Sensor Probe

“…The curves moved to slightly higher temperature upon increasing the CNTs loading. From the TGA curves the temperatures of 10, 25, and 50% weight loss, T 10 , T 25 , and T 50 , were obtained . In addition, from the DTG curves the maximum polymer degradation temperature PDT max were determined .…”