The effect of a molecular weight and an amount of PEGDA (poly(ethylene glycol)diacrylate) on a preparation of sodium methallyl sulfonate-co-PEGDA microspheres and sorption behavior of Co(II)

Oxidized g-C3N4/polyaniline nanofiber composite for the selective removal of hexavalent chromium

“…The Ea for physisorption varies between 5 to 40 kJ/mol and for chemisorption Ea range from 40 to 800 kJ/mol. The Ea for Cr(VI) adsorption on the Ox-g-C 3 N 4 /Pani-NF composite is 20.660 kJ/mol, indicating the involvement of physical forces in adsorption process 45 .…”

“…The obtained values of ΔG° at 30, 40, and 50 °C are −2.669, −3.054, and −4.307 kJ/mol, indicating the spontaneous nature of adsorption process and the feasibility of Cr(VI) adsorption on the Ox-g-C 3 N 4 /Pani-NF composite 44 . The values of ΔG° ranges from −20 to 0 kJ/mol and −80 to −400 kJ/mol are often for physisorption and chemisorption, respectively 45 . In this study, the obtained ΔG° values indicate that the adsorption of Cr(VI) onto Ox-g-C 3 N 4 /Pani-NF composite is physisorption.…”

“…The ΔH° for chemisorption is usually between 40 and 120 kJ/mol, while the obtained ΔH° value for Cr(VI) adsorption is 22.055 kJ/mol. Thus, the adsorptive removal of Cr(VI) by Ox-g-C 3 N 4 /Pani-NF composite is due to physisorption 45 , 47 .

Figure 7 Effect of reaction time and temperature on the removal of Cr(VI) by Ox-g-C 3 N 4 /Pani-NF composite.

…”

Clay Materials for Environmental Remediation

“…As the adsorbent, the polyethylene glycol must be polymerized to introduce several functional groups in its structure and subsequently functionalized with vinyl groups at the chain-ends such as polyethylene glycol diacrylate and these active vinyl groups may be crosslinked to form PEG based superabsorbent hydrogel (Kwak et al 2013;. The modification and shaping of these clay minerals into functional materials has received much attention over the past decades, especially in adsorption and separation process .…”

Facile Synthesis of Hydrogel-Based Ion-Exchange Resins for Nitrite/Nitrate Removal and Studies of Adsorption Behavior

“…Polyethylene glycol (PEG) is a non-toxic, non-immunogenic, biocompatible, hydrophilic hydrogel, and PEG derivatives—such as polyethylene glycol diacrylate—are most commonly functionalized with vinyl groups at the chain ends (PEGDA). PEGDA could photo-cross-link to form hydrogel adsorbents with biodegradable and high swelling characteristics that could be applied in recovery of heavy metals in waste waters and adsorption of dyes [ 47 , 48 , 49 , 50 ].…”